JP6746316B2 - Lens device, optical device using the same, and manufacturing method thereof - Google Patents

Description

The present invention relates to a lens device, an optical device using the same, and a manufacturing method thereof.

An optical device such as a projector is used in various postures such as a ceiling suspension hung from the ceiling and a tilting projection with a projection lens (lens device) directed downward or upward, in addition to stationary use such as a desk.

In addition, in a lens device mounted on a projector or the like, a so-called play (clearance) is provided between the cam follower and the rectilinear groove or the cam groove in order to smoothly move the lens unit during focusing or zooming. For this reason, when the projector is used in various postures as described above, there is a problem that the postures and positions of the plurality of lens units inside the device change depending on the posture of the projector due to backlash, and stable optical performance cannot be obtained. It was

As a technique for solving such a problem, the technique described in Patent Document 1 is known. Patent Document 1 is provided next to the lens unit, and a coil spring is provided between the lens unit and a moving ring that moves along the same locus as the lens unit, so that the lens unit moves in a predetermined direction regardless of the posture of the projector. A biasing arrangement is disclosed. With such a configuration, it is possible to suppress the influence of the change in the posture described above.

JP, 2013-257369, A

However, if the technique of Patent Document 1 is used to urge three lens units in a predetermined direction, for example, three moving rings are required, and the lens device may become large in the optical axis direction. Alternatively, if the distance between the three lens units is small, the moving ring described in Patent Document 1 may not be provided between the lens units.

Therefore, it is an object of the present invention to provide a lens apparatus that is more compact and can suppress the influence of a change in posture, an optical apparatus using the lens apparatus, and manufacturing methods thereof.

In order to solve the above problems, the lens device of the present invention,
A first tubular member having a plurality of cam grooves;
A second tubular member having a straight groove,
A first lens holding frame for holding a first lens unit, the first lens holding frame having a first cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves;
A second lens holding frame that holds a second lens unit, the second lens holding frame having a second cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves;
A third lens holding frame that holds a third lens unit, has a third cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves, and has an opening ; and A lens device in which a first lens holding frame, the second lens holding frame, and the third lens holding frame are arranged in this order,
One end is connected to the first lens holding frame, the other end is connected to the third lens holding frame, and the first lens holding frame and the third lens holding frame are connected to the lens device. First urging means for urging to apply a force in the optical axis direction and in a direction orthogonal to the optical axis ,
One end is connected to the second lens holding frame, the other end is connected to the third lens holding frame, and the second lens holding frame and the third lens holding frame are connected to the lens device. e Bei second biasing means for biasing to apply a force in a direction perpendicular to the optical axis and the optical axis, a,
The opening is provided with the third cam follower, the first urging means, and the second urging means when the third lens holding frame is viewed from the optical axis direction of the lens device. It is characterized in that it is formed at a position different from the position .

According to the present invention, it is possible to provide a more compact lens device capable of suppressing the influence of a change in posture, an optical device using the same, and a manufacturing method thereof.

The exploded perspective view of a lens unit. FIG. 3 is an exploded perspective view of three lens barrels and a coil spring. The perspective view of three lens-barrels which attached the coil spring and were united. 6A to 6C are views for explaining the method of manufacturing the lens device. FIG. 3 is a diagram for explaining the configuration of an optical device that can mount a lens device.

Preferred embodiments of the present invention will be exemplarily described below with reference to the drawings. However, the relative disposition of the components described in this embodiment should be appropriately changed depending on the configuration of the apparatus to which the present invention is applied and various conditions. That is, the present invention is not limited to the embodiments described below, and various modifications and changes can be made within the scope of the invention.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

(Structure of lens device)
FIG. 1 shows an exploded perspective view of the lens device 100 of this embodiment.

Reference numeral 101 denotes a first barrel that can hold the first lens group. Reference numeral 102 denotes a second group lens barrel (fourth lens holding frame) capable of holding the second lens group (fourth lens unit). Reference numeral 103 denotes a third lens barrel (first lens holding frame) capable of holding the third lens group (first lens unit). Reference numeral 104 denotes a fourth lens barrel (second lens holding frame) capable of holding the fourth lens group (second lens unit), and 105 denotes a fifth mirror capable of holding the fifth lens group (third lens unit). It is a cylinder (third lens holding frame). Reference numeral 106 denotes a sixth barrel that can hold the sixth lens group. Screw holes are provided on the surface of each lens barrel so that cam followers 1081 to 1086, which will be described later, can be mounted, and the cam followers are mounted on the lens barrel by screws.

The lens device 100 includes the first lens barrel to the sixth lens barrel in order from the enlargement side. The first lens group and the sixth lens group are immovable during zooming, and the second lens barrel, the third lens barrel, the fourth lens barrel, and the fifth lens barrel are spaced from each other during zooming. Move to change.

Reference numeral 111 is a fixed cylinder (second cylinder member), and 112 is a mount. A mount 112 is screwed to the rear end of the fixed barrel 111 in the optical axis direction (the end on the sixth lens barrel side). The mount 112 has a flange portion attached to the optical device body.

Reference numeral 113 denotes a focus cam ring as a first rotary ring which is arranged in the front side (first lens barrel side) region of the outer circumference of the fixed barrel 111, has a gear portion (not shown), and rotates about the optical axis. is there. Reference numeral 114 denotes a zoom cam ring (first cylinder member, cam cylinder) as a second rotary ring that is disposed in a rear side (sixth lens barrel side) region of the inner circumference of the fixed cylinder 111 and rotates around the optical axis. ).

Reference numeral 1081 denotes a first cam follower attached to the first lens barrel 101 with a screw, and reference numeral 1082 denotes a second cam follower (fourth cam follower) attached to the second lens barrel 102 with a screw. Reference numeral 1083 is a third cam follower (first cam follower) attached to the third lens barrel 103 with a screw, and 1084 is a fourth cam follower (second cam follower) attached to the fourth lens barrel 104 with a screw. Reference numeral 1085 denotes a fifth cam follower (third cam follower) attached to the fifth lens barrel 105 with a screw, and 1086 is a sixth cam follower attached to the sixth lens barrel 106 with a screw. The cam followers are provided in mutually different phases, and specifically, a total of three cam followers are mounted on each lens barrel at 120-degree intervals.

Reference numeral 115 denotes a zoom ring which has a gear portion (not shown), is arranged on the outer periphery of the fixed barrel 111, and is attached so as to rotate integrally with the zoom cam ring 114 via a connecting member (not shown). 116 is the optical axis of the lens unit 100.

121 is a motor unit as an actuator. The motor unit 121 includes a motor body such as a stepping motor, a DC motor, a vibration type motor, and a reduction gear box that decelerates and outputs the rotation of the motor body. The motor unit 121 is fixed to the holding member 122 with screws. By fixing the holding member 122 to the fixed cylinder 111 with a screw, the holding member 122 is in a state of meshing with the gear portion of the focus cam ring 113 and the gear portion of the zoom ring 115.

(Structure of focus mechanism)
Next, the focus mechanism will be described. The first lens barrel 101 holds a first lens group that is a focus position adjusting lens unit, and focusing is performed by moving the first lens barrel 101 in the direction of the optical axis 116 by a predetermined amount. The configuration for moving the first lens barrel 101 in the direction of the optical axis 116 is as follows.

Cam followers 1081 are attached to the outer periphery of the first lens barrel 101 at three locations at intervals of 120° in the circumferential direction. The cam followers 1081 provided on the first barrel 101 are fitted into the straight-moving grooves 111A arranged at three positions on the fixed barrel 111 at 120° intervals in the direction of the optical axis 116. Further, the cam follower 1081 fits into the cam grooves 113A arranged at three positions every 120° with the focus cam ring 113 having an angle with respect to the outer peripheral direction of the focus cam ring 113. The focus cam ring 113 is arranged with respect to the fixed barrel 111 in a state in which movement in the direction of the optical axis 116 is blocked by a bayonet coupling structure or the like, and is only rotatable around the optical axis 116.

When the motor unit 121 engaged with the gear portion of the focus cam ring 113 is driven, the drive is transmitted to the gear portion of the focus cam ring 113, and the focus cam ring 113 is rotationally driven. When the focus cam ring 113 rotates, the intersection of the cam groove 113A and the rectilinear groove 111A moves in the direction of the optical axis 116. By this movement, the first lens barrel 101 to which the cam follower 1081 is attached moves in the direction of the optical axis 116, and focusing is performed.

(Structure of zoom mechanism)
Next, the zoom mechanism will be described. The second lens barrel 102, the third lens barrel 103, the fourth lens barrel 104, and the fifth lens barrel 105 each hold a variable power lens as the second to fifth lens groups. Zooming is performed by moving the second lens barrel 102, the third lens barrel 103, the fourth lens barrel 104, and the fifth lens barrel 105 in the direction of the optical axis 116 by a predetermined amount. The configuration for moving the second to fifth lens barrels in the direction of the optical axis 116 is as follows.

Cam followers 1082 to 1085 are attached to the outer peripheries of the second lens barrel 102, the third lens barrel 103, the fourth lens barrel 104, and the fifth lens barrel 105 at three locations at intervals of 120° in the circumferential direction. The cam followers 1082 to 1085 provided on the lens barrels 102 to 105 are fitted into the straight-moving grooves 111B arranged in the fixed barrel 111 at three positions of 120° in the direction of the optical axis 116. Further, the first, second, third, and fourth cam grooves 114A, 114B, 114C formed by arranging the zoom cam ring 114 at three angles of 120° with respect to the outer circumferential direction of the zoom cam ring 114 are formed. , 114D, respectively.

The zoom cam ring 114 is arranged in a state in which movement in the direction of the optical axis 116 is blocked by the bayonet coupling structure or the like with respect to the fixed barrel 111 , and is rotatable around the optical axis. Further, the zoom cam ring 114 and the zoom ring 115 move together via a connecting member (not shown). When the motor unit 121 meshed with the gear portion of the zoom ring 115 is driven, the drive is transmitted to the gear portion of the zoom ring 115 and the zoom ring 115 is rotationally driven.

Further, the zoom cam ring 114 is rotationally driven via the connecting member. When the zoom ring 115 and the zoom cam ring 114 rotate, the intersection of the cam grooves 114A, 114B, 114C, 114D and the rectilinear groove 111B moves in the optical axis direction. By this movement, the second, third, fourth, and fifth lens barrels 102 to 105 to which the cam followers 1082 to 1085 are attached move in the direction of the optical axis 116, and zooming is performed.

The sixth lens barrel 106 holds a relay lens as a sixth lens group, is fixed to the rear end of the mount 112 via a cam follower 108, and does not move for zooming.

Further, as described above, the cam followers 1083, 1084, 1085 are fitted into the predetermined cam grooves (cam grooves 114B, 114C, 114D) and the rectilinear groove 111B among the plurality of cam grooves. In other words, the cam followers 1083, 1084, 1085 fit in different cam grooves. Although only one cam follower is shown in FIG. 1 for example, actually three cam followers are provided at intervals of 120 degrees.

(Structure of biasing means)
Next, the configuration of the biasing means in the present embodiment and the principle that makes it possible to suppress the influence and size increase of the posture change will be described with reference to FIGS.

2 and 3, 107 and 109 are coil springs. The coil springs 107 and 109 are provided to remove the play of both the cam followers 1083 to 1085 and the cam grooves 114A, 114B, 114C and 114D, and the cam followers 1083 to 1085 and the straight advance groove 111B.

As shown in FIGS. 2 and 3, the lens device 100 includes a coil spring 107 and a coil spring 109 as biasing means. Coil spring 107 one end provided in the third barrel 103, a first biasing means for the other end provided with a fifth barrel 105, the coil spring 109 is one end the fourth lens barrel 104 And the other end is a second urging means provided on the fifth lens barrel 105. The coil springs 107 and 109 are both elastic members, and exert an elastic force when the intervals between the lens barrels are widened and pulled.

With such a configuration, the elastic force acts between the third lens barrel 103 and the fifth lens barrel 105, and the elastic force acts between the fourth lens barrel 104 and the fifth lens barrel 105. As a result, each lens barrel can be biased in a predetermined direction regardless of the posture of the projector. That is, it is possible to suppress the influence of the change in the posture of the projector without providing the same number of moving rings as that described in Patent Document 1 described above with the lens barrel.

As a comparative example, consider a configuration in which the coil spring 107 is provided between the third barrel 103 and the fourth barrel 104. In the case of this configuration, the fourth lens barrel 104 is affected by both the elastic force of the coil spring 107 and the elastic force of the coil spring 109. Therefore, depending on the strength relationship between the elastic forces of the coil spring 107 and the coil spring 109, it may be difficult to urge the fourth lens barrel 104 in a predetermined direction regardless of the posture of the projector.

On the other hand, in the above-described embodiment, the coil spring 107 is provided between the third lens barrel 103 and the fifth lens barrel 105, and the coil spring 109 is formed between the fourth lens barrel 104 and the fifth lens barrel 105. It is provided in between. Therefore, only the elastic force of the coil spring 109 acts on the fourth lens barrel 104. More specifically, the coil spring 107 and the coil spring 109 are elastic members that generate elastic force in a direction that brings the two connected lens holding frames closer to each other.

It is not necessary for all the lens barrels to be biased in the same direction, and even if the posture of the projector changes, the cam followers provided in each lens barrel have a fixed direction for each lens barrel with respect to the rectilinear groove and the cam groove. Should be urged to.

(Lens device manufacturing method)
A method of manufacturing the lens device 100 will be described with reference to FIGS. 2 to 4. In particular, the third barrel 103, the fourth barrel 104, and the fifth barrel 105 will be described.

Reference numerals 103B and 105B are moving ring rotation restricting shafts. 104B is a third lens barrel and a fifth lens barrel rotation restricting hole. 116 is the optical axis of the lens unit 100.

The moving ring rotation restriction shaft 105B is inserted into the fourth-group barrel and fifth-group barrel rotation-regulating holes 104B, and the coil spring 109 is attached to the fourth barrel and the fifth barrel by screws. Further, the moving ring rotation restricting shaft 103B is inserted into the fourth group lens barrel and the fifth group lens barrel rotation restricting hole 104B, and the coil spring 107 is attached to the third lens barrel and the fourth lens barrel by screws. The third barrel 103, the fourth barrel 104, and the fifth barrel 105, which are integrated by attaching the coil spring 107 and the coil spring 109, are as shown in FIG.

The play amount of the movable ring rotation restricting shafts 103B and 105B and the third lens barrel and the fifth lens barrel rotation restricting hole 104B is set to be larger than the play amount of the cam follower 108 and the rectilinear groove 111B. If the magnitude relationship between the two play amounts is opposite, the moving ring rotation restricting shafts 103B and 105B contact the third lens barrel and the fifth lens barrel rotation restricting hole 104B even if the coil springs 107 and 109 are used to fill the play. Therefore, it is not preferable.

The integrated third barrel 103, fourth barrel 104, and fifth barrel 105 are inserted from the rear side of the fixed barrel 111 (sixth barrel side). First, as shown in FIG. 4A, the cam follower 108 is attached to the third lens barrel 103 from the outer periphery at the intersection of the straight advance groove 111B and the second cam groove 114B (first attaching step).

Next, as shown in FIG. 4B, the fifth lens barrel 105 is formed by using three notches (openings) 105C and tools (adjusting means) 130 at every 120° in the circumferential direction. Move 105 to the desired position. The cutouts 105C may be present in different phases centered on the optical axis.

That is, in the fifth lens barrel 105, a tool 130 whose position at which the cam follower 1084 of the fourth lens barrel 104 is mounted can be adjusted can be guided to the fourth lens barrel 104 from the fixed barrel 111 or the end side of the zoom cam ring 114. An opening is provided.

In this state, the cam follower 108 is attached to the fifth lens barrel 105 from the outer circumference at the intersection of the straight advance groove 111B and the fifth cam groove 114D (third attaching step).

Finally, as shown in FIG. 4C, the fourth lens barrel 104 is moved by accessing the fourth lens barrel 104 through three cutouts 105C at every 120° in the circumferential direction of the fifth lens barrel 105. Move to the desired position. In this state, the cam follower 108 is attached to the fourth lens barrel 104 from the outer periphery at the intersection of the straight advance groove 111B and the fourth cam groove 114C (second attaching step).

With the above-described assembly procedure, the cam follower can be fixed to the lens barrel that is always biased by only one lens barrel. As a result, it becomes easy to attach the cam follower 108 to each of the third barrel 103, the fourth barrel 104, and the fifth barrel 105, which are integrated. That is, it is preferable to perform the second mounting step last among the first mounting step, the second mounting step, and the third mounting step.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims. For example, in the above-described embodiment, the coil spring 109 is pulled to be used to generate the biasing force to remove the backlash, but the compression spring may be used to generate the biasing force to remove the backlash.

The coil spring 107 is provided between the third lens barrel 103 and the fifth lens barrel 105, and a new coil spring is provided between the third lens barrel 103 and the fourth lens barrel 104 instead of the coil spring 109. And so on. That is, in addition to the coil spring 107 as the first biasing means, one end is provided as the second biasing means in the fourth lens barrel 104, and the other end is provided as the third lens barrel 103 or the fifth mirror. It suffices to have an elastic member such as a coil spring provided on the cylinder 105.

The drawings shown in FIGS. 4A to 4C are merely simplified diagrams, and more specifically, as shown in FIGS. 2 and 3, the coil springs 107 and 109 are arranged in the optical axis direction and orthogonal to the optical axis. It is provided obliquely so as to exert elastic force in both directions. Therefore, for example, when the cam follower 1083 is attached to the third lens barrel 103, the positions at which the cam followers 1084 and 1085 are attached to the cam follower 1083 may be displaced in the direction orthogonal to the optical axis. That is, the fourth lens barrel 104 and the fifth lens barrel 105 may rotate with respect to the third lens barrel 103. In such a case, not only the adjustment of the positions of both lens barrels in the optical axis direction using the above-described tool 130, but also the adjustment of rotating both lens barrels may be performed.

(Projector configuration)
The configuration of a projector (optical device, projection display device) in which the above-described lens device 100 can be mounted will be described with reference to FIG.

A light source device (light source) 1 includes a light emitting tube 3 and a parabolic reflector 2 that reflects a light beam from the light emitting tube 3 into a parallel light beam and guides it to an illumination optical system 4.

Reference numeral 4 denotes an illumination optical system, which includes a first fly-eye lens 5A that splits the light flux from the light source device 1 into a plurality of partial light fluxes, and a second fly-eye lens that receives the light flux from the first fly-eye lens 5A. With 5B. Further, the illumination optical system 4 receives the light flux from the second fly-eye lens 5B and aligns it in a predetermined polarization direction with the polarization conversion element 6 and the light flux from the polarization conversion element 6 through the mirror 8 for color separation and synthesis. A condenser lens 7 leading to the system 9 is provided.

Reference numeral 9 denotes a color separating/combining system, which includes a dichroic mirror, a polarization beam splitter, a color combining prism, etc., which are not shown. Reference numeral 10 denotes a reflective liquid crystal panel (light modulator) that modulates the light from the color separation/combination system 9 based on the signal from the control board 11 and returns it to the color separation/combination system 9. Reference numeral 12 denotes a housing (holding member) for housing and holding the above-described components including the liquid crystal panel 10.

The light modulated by the liquid crystal panel 10 is guided to the lens device 100 as a projection lens via the color separation/combination system 9, so that a predetermined image is projected on a projection surface such as a screen.

The method of manufacturing the projector (optical device) having such a configuration may be configured by adding the step of mounting the lens device 100 to the housing 12 to the method of manufacturing the lens device described above.

(Other embodiments)
In the above-described embodiments, the configuration having six lens units is disclosed, but the present invention is not limited to such a configuration, and the present invention can be applied to a lens device having a configuration having seven lens units. Is. As an example, it is assumed that there are seven lens units, and that there is a lens device in which the lens unit on the most magnification side and the lens unit on the most reduction side are immovable for zooming. The configuration of the above-described embodiment may be applied to the lens holding frame that holds the fourth, fifth, and sixth lens units from the enlargement side in such a lens device.

It should be noted that the lens unit here refers to a group of a plurality of lenses or a single lens whose spacing between adjacent lens units changes during zooming, and a lens holding frame holds these lens units. In other words, a portion of the space between the lenses that changes during zooming serves as a partition for each lens unit. Note that, for example, a configuration may be adopted in which the lens unit that does not move during zooming has a plurality of lens holding frames that move on different trajectories during focusing.

Further, in the above-described embodiment, the configuration having six lens units is disclosed, but a configuration having a diaphragm may be used in addition to the lens units. This diaphragm may move integrally with a certain lens unit, or may move along a locus different from that of all lens units.

Further, in the above-described embodiment, the configuration in which the first tubular member having the straight groove is provided outside the second tubular member having the cam groove is disclosed, but the first tubular member is provided inside the second tubular member. The configuration may be such that the tubular member is provided.

Further, in the above-described embodiments, the configuration having the high-pressure mercury lamp as the light source is disclosed, but the configuration may be such that the blue laser diode and the phosphor are used as the light source.

Further, in the above-described embodiments, the projection lens mounted on the projector as the lens device has been illustrated, but the present invention is not limited to the projection lens and can be applied to, for example, a lens for a camera.

103 Third barrel (first lens holding frame)
104 Fourth lens barrel (second lens holding frame)
105 fifth lens barrel (third lens holding frame)
107 Coil spring (first urging means)
109 Coil spring (second urging means)
111 Fixed tube (second tube member)
114 zoom cam ring (first cylinder member)

Claims (11)

A first tubular member having a plurality of cam grooves;
A second tubular member having a straight groove,
A first lens holding frame having a first cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves, and holds the first lens unit;
A second lens holding frame for holding a second lens unit, the second lens holding frame having a second cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves;
A third lens holding frame that holds a third lens unit, has a third cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves, and has an opening ; and A lens device in which a first lens holding frame, the second lens holding frame, and the third lens holding frame are arranged in this order,
One end is connected to the first lens holding frame, the other end is connected to the third lens holding frame, and the first lens holding frame and the third lens holding frame are connected to the lens device. First urging means for urging to apply a force in the optical axis direction and in a direction orthogonal to the optical axis ,
One end is connected to the second lens holding frame, the other end is connected to the third lens holding frame, and the second lens holding frame and the third lens holding frame are connected to the lens device. e Bei second biasing means for biasing to apply a force in a direction perpendicular to the optical axis and the optical axis, a,
The opening is provided with the third cam follower, the first urging means, and the second urging means when the third lens holding frame is viewed from the optical axis direction of the lens device. The lens device is formed at a position different from the position . The opening is formed in the state where the first lens holding frame, the second lens holding frame, and the third lens holding frame are inserted into the first tubular member or the second tubular member. The position of the second lens holding frame is adjusted from the end side of the first tubular member or the second tubular member to the position in the optical axis direction by adjusting means capable of adjusting the position at which the second cam follower is mounted. A plurality of adjustable positions of the optical axis in the rotation direction are provided,
The lens device according to claim 1, wherein: Wherein the plurality of openings is a Switching Operation-out portion which is centered on the optical axis is provided for each 120 degrees in the circumferential direction,
The lens device according to claim 2, wherein: Of the plurality of cam grooves, a fourth lens holding frame for holding a fourth lens unit, which has a fourth cam follower fitted into a predetermined cam groove and the straight-moving groove, is used as the first tubular member or the above. Provided between the end of the second tubular member and the first lens holding frame,
The lens device according to any one of claims 1 to 3, wherein: The first lens holding frame, the second lens holding frame, and the third lens holding frame move so that the distance between adjacent holding frames during zooming changes.
The lens device according to any one of claims 1 to 4, wherein: The first biasing means and the second biasing means are elastic members,
The lens device according to any one of claims 1 to 5, wherein: The first urging means and the second urging means generate an elastic force in a direction to bring the two connected lens holding frames closer to each other.
The lens device according to claim 6, wherein: A light modulator,
The lens device according to claim 1, further comprising:
An optical device characterized by the above. A first tubular member having a plurality of cam grooves;
A second tubular member having a straight groove,
A first lens holding frame capable of mounting a first cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves and capable of holding a first lens unit;
A second lens holding frame to which a second cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves can be attached and which can hold a second lens unit;
A third lens holding frame capable of holding a third lens unit, in which a third cam follower fitted into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves can be mounted, and a plurality of openings. And a third lens holding frame having a portion, wherein the first lens holding frame, the second lens holding frame, and the third lens holding frame are arranged in this order. The manufacturing method of
Between the first lens holding frame and the third lens holding frame , the first lens holding frame and the third lens holding frame are arranged in the optical axis direction of the lens device and in a direction orthogonal to the optical axis. Attaching a first biasing means for biasing to exert a force on
Between the second lens holding frame and the third lens holding frame , the second lens holding frame and the third lens holding frame are arranged in the optical axis direction of the lens device and in a direction orthogonal to the optical axis. Attaching a second biasing means for biasing to exert a force on
Inserting the first lens holding frame, the second lens holding frame, and the third lens holding frame into the first tubular member or the second tubular member,
At least one of the position and the angle of the first lens holding frame is adjusted so that the first cam follower fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves. A first mounting step of mounting the cam follower on the first lens holding frame;
Through the plurality of openings, said second cam follower is fitted to a predetermined cam groove and the straight groove of the plurality of cam grooves by an adjustable adjustment means the position of the second lens holding frame A second mounting step of mounting at least one of the position and angle of the second lens holding frame to mount the second cam follower on the second lens holding frame.
At least one of the position and angle in the optical axis direction of the third lens holding frame is adjusted so that the third cam follower fits into a predetermined cam groove and the straight-moving groove of the plurality of cam grooves. A third mounting step of mounting the third cam follower on the third lens holding frame,
Bei to give a,
The opening is a position where the third cam follower, the first biasing means, and the second biasing means are arranged when the third lens holding frame is viewed from the optical axis direction of the lens device. A method of manufacturing a lens device, wherein the lens device is formed at a position different from that of. Of the first mounting step, the second mounting step, and the third mounting step, the second mounting step is performed last.
The method for manufacturing a lens device according to claim 9, wherein A first tubular member having a plurality of cam grooves;
A second tubular member having a straight groove,
A first lens holding frame capable of mounting a first cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves and capable of holding a first lens unit;
A second lens holding frame to which a second cam follower that fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves can be attached and which can hold a second lens unit;
A third lens holding frame capable of holding a third lens unit, in which a third cam follower fitted into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves can be mounted, and a plurality of openings. And a third lens holding frame having a portion, wherein the first lens holding frame, the second lens holding frame, and the third lens holding frame are arranged in this order. A method of manufacturing an optical device comprising:
Between the first lens holding frame and the third lens holding frame , the first lens holding frame and the third lens holding frame are arranged in the optical axis direction of the lens device and in a direction orthogonal to the optical axis. Attaching a first biasing means for biasing to exert a force on
Between the second lens holding frame and the third lens holding frame , the second lens holding frame and the third lens holding frame are arranged in the optical axis direction of the lens device and in a direction orthogonal to the optical axis. Attaching a second biasing means for biasing to exert a force on
Inserting the first lens holding frame, the second lens holding frame, and the third lens holding frame into the first tubular member or the second tubular member;
At least one of the position and the angle of the first lens holding frame is adjusted so that the first cam follower fits into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves. A first mounting step of mounting the cam follower on the first lens holding frame;
The second cam follower is fitted into a predetermined cam groove and the rectilinear groove of the plurality of cam grooves by the adjusting means capable of adjusting the position of the second lens holding frame through the plurality of openings. A second mounting step of mounting at least one of the position and angle of the second lens holding frame to mount the second cam follower on the second lens holding frame.
At least one of the position and angle in the optical axis direction of the third lens holding frame is adjusted so that the third cam follower fits into a predetermined cam groove and the straight-moving groove of the plurality of cam grooves. A third mounting step of mounting the third cam follower on the third lens holding frame,
E Bei the steps of: attaching the lens system relative to the holding member for holding the optical modulation element,
The opening is a position where the third cam follower, the first biasing means, and the second biasing means are arranged when the third lens holding frame is viewed from the optical axis direction of the lens device. A method for manufacturing an optical device, characterized in that the optical device is formed at a position different from that of.

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