DE102008021140B3 - Lens with a device for pivoting an optical assembly in the beam path of the lens - Google Patents

Abstract

The device for pivoting an optical assembly, in particular an extender (202), based on a drive and the interaction of a gear (212), a gear segment (220) and a spring bias (116). The drive of the device consists of a mounted outside of the lens housing rotary ring with teeth. This can easily be driven by a motor in the usual way. Therefore, the device is ideally suited for automation or motor control. The gear segment (220) coupled in driving the rotary ring and transmission of this movement through a gear (120, 118, 204, 206, 208, 210) partly in the gear (212), partly decoupled. In the decoupled state, a spring (116) pulls the gear (212) into one of two stable positions, depending on the position. In one of the positions of the optical assembly (202) is pivoted in the other swung out. Thus, the device provides a bistable system for pivoting the optical assembly (202), which is particularly suitable for motor drive.

Description

Field of the invention

The The invention relates to a device for pivoting an optical Assembly in the beam path of a lens.

typically, is the optical assembly a focal length extender. Focal length extender also referred to as extender or range extender. A field of application of Invention are lenses that include a focal length extender. It can be both recording lenses and projection lenses act. Main field of application of the invention are currently projection lens for the Cinema projection, in particular digital cinema projection.

at The cinema projection usually become projects two formats: On the one hand the digital widescreen format, which is a relationship Image width (B) to image height (H) of B: H = 1.896: 1. The digital widescreen format is also common as a 1.9: 1 format designated. On the other hand, the digital Cinemascope format is projected which has the format 2.37: 1. The aspect ratio is in the width around that required in the digital projection (anamorphic) Increased factor 1.25, d. H. 1.896 x 1.25 = 2.37.

Further details on the different image formats and their implementation in cinemas can be found in the WO 2007/093378 A2 , the contents of which are included by reference in this description. In the WO 2007/093378 A2 It is also described that it is helpful or sufficient to switch a focal length extender into a projection lens with a fixed focal length for switching between different image formats. A suitable projection lens and a suitable focal length extender, which can extend the focal length by the required factor of 1.25, is in the above WO 2007/093378 A2 described in detail. The content of this WO 2007/093378 A2 is incorporated by reference into this description.

State of the art

In The video and movie recording techniques also become extender designs used in shooting lenses. These allow, for example, a Doubling the focal length. The switching (the swinging in or out of the extender) between the focal lengths takes place in the known used extender constructions with the help of a lever construction. However, the known lever design are hardly suitable a mechanical or motorized operation.

An objective which has a motor which can be pivoted in and out in the beam path of the objective is shown in the publication (US Pat. JP6201979 A ) disclosed. The engine rotation is transmitted via a gearbox to the extender.

Another document ( JP102572A ) also describes a device for pivoting the extender of a lens. In this device, the rotation of the motor is transmitted via a transmission to the extender. A spring presses the swiveling the extender in one of the two desired states (extender on or swung out).

task The invention is to provide a device which is the machine or motorized Swiveling an optical assembly into the beam path of a Lens facilitates.

solution

These The object is achieved by the invention with the features of the independent claim solved. Advantageous developments of the invention are characterized in the subclaims.

The Lens has a device for pivoting an optical assembly in the beam path of the lens. This optical assembly is in particular an extender.

To the lens has a drive rotary ring on the outside of the lens housing is arranged and designed such that it can be driven by a motor is. Therefore has the drive rotary ring z. B. grooves or teeth on its outside, So is a gear or a cylindrical toothed ring.

critical for the Swiveling in or out of the optical assembly is a gear and a gear segment or their interaction.

One Drive or a rotation which acts on the drive rotary ring, will over transmit a gear to the gear segment. This interacts with the gear - see below. The gear, in turn, drives the optical via a gearbox Assembly, whereby this is switched on or swung out. The used Gearboxes have a suitable gear ratio. The translation is suitable the transmission z. B. then, if by about a quarter-turn of the drive rotary ring the optical assembly from the one bistable position is moved into the other.

The Gear and the gear segment and the transmission are designed such that upon rotation of the drive rotary ring, the gear segment in the Gear engages and this turns until the gear segment after a partial revolution decoupled from the gear.

The Gear is then, when it is decoupled from the gear segment, by an elastic element pulled into a stable position. The elastic Element is z. B. a coil spring.

Thereby The optical assembly is pivoted in the beam path of the lens.

to Achieving a stable location for The optical assembly is so the transmission just before the stop means Gear segment decoupled. When the direction of rotation changes, the transmission is coupled again and put the optical assembly in the other stable position. Again, the transmission is decoupled shortly before the stop.

The optical assembly may be due to the proposed mechanism between two stable states or swung out. Through the combined use of gear segment and elastic element, the drive rotary ring thus a bistable Drive system that ensures a bistable position for the optical assembly.

Thereby, that a drive rotary ring with possibly teeth on its outside is provided for pivoting the optical assembly, is the Device best for designed a mechanical or motorized operation. rotating rings can be operated well motor and are widely used in the field of motor exercise.

The optical assembly or the lens also has a diaphragm, which is coupled to the optical assembly in such a way that in the beam path of the lens is pivoted when the optical Assembly upon rotation of the drive rotary ring from the beam path of the lens is pivoted out. The aperture is out of the beam path pivoted out of the lens when the optical assembly is attached a rotation of the drive rotary ring in the beam path of the lens is pivoted into it. The aperture is formed in two pieces, with a firmly connected to the optical assembly section and with a movable section. The latter is designed such that the aperture when swinging out of the beam path of the lens folded by abutment of the movable portion of the lens housing becomes.

At the Swing out the optical assembly and swivel the aperture in the beam path of the lens is the moving section the aperture unfolded with the help of a thigh spring. When swinging the extender and swinging out the aperture, the aperture is over the housing stop folded again. This is due to the cramped installation space necessary inside the lens.

The Exact position of the optical module in the pivoted state with respect to the optical axis of the lens is using a adjustable stop set.

The If necessary, the optical module must still be replaced by moving an internal module Lens group on the respective projection distance in the respective Cinema room to be set. For this purpose, the lens has suitable means. These means are accessible from outside on the mounted lens. The fine adjustment The projection distance can therefore be provided by the customer. It is needed once per cinema room.

The displacement of the lens group is preferably carried out with an eccentric construction. This is characterized in that a driving sleeve with an end-side groove form-fitting in an eccentric sleeve and the eccentric sleeve are non-positively and positively mounted rotatably in the housing. The groove of the driving sleeve engages positively in a pin of the socket of the lens group. When turning the eccentric sleeve ver The drive sleeve is laterally, whereby the lens group is shifted in the lens along the optical axis.

Further Details and features will become apparent from the following description a preferred embodiment in conjunction with the subclaims.

The embodiment is shown schematically in the figures. Same reference numbers in the individual figures designate the same or functionally identical or with respect to their functions corresponding elements. In detail shows:

1A a perspective view of a lens with range extender;

1B a side view of a lens with range extender;

1C an external perspective view of the housing section for the extender (partial view of the lens);

2A a first perspective view of the extender in the active state (aperture inactive) with transmission chain;

2 B a second perspective view of the extender in the active state (aperture inactive) with transmission chain;

3 a detailed view (schematically) of the transmission chain of the extender;

4A a frontal view View of extender with unfolded aperture (range extender inactive);

4B a perspective view of the extended extender extender (range extender inactive);

4C a perspective view of the extender with active diaphragm (extender inactive);

5 a detailed view (sectional view) of the adjusting device for centering the inserted extender;

6A a detailed view (sectional view) of the housing outer wall with the fine tuning of the extender for Schnittweitereckungseinstellung;

6B a detail view (sectional view) of the extender with the Exzentervorrichtung for Schnittweitendeckungseinstellung;

7 a detailed view (vertical sectional view) of the housing section with the extender and the mechanics.

• Tab. 1 die Kennzahlen der Zahnräder des Getriebes;
• Tab. 2 die Kennzahlen der Übersetzungsverhältnisse und Antriebswinkel des Getriebes.

The technical data for the gear ratios of the extender mechanism are listed in Tables 1 and 2. In detail shows:

• Tab. 1, the ratios of the gears of the transmission;
• Tab. 2 the ratios of the gear ratios and drive angle of the transmission.

1A and 1B show a perspective and a side view of an advantageous embodiment of a projection lens 100 with a retractable extender 202 (please refer 2A ). The objective 100 has in addition to the usual, arranged in the housing optical modules via a drive rotary ring 102 , which is provided with a toothing (264 teeth), as well as a housing section 104 , in whose cramped installation space the extender (on 1A and 1B not shown) is arranged.

In the housing outer wall 105 of the housing section 104 are a few adjustment elements 106 arranged the extender. These include a clamping plate 108 and an annular disk 110 that are needed to match the projection distance. These are held by screws 608 and surround a cover screw 606 (for details see 6A ). As an aid to the vote on the projection distance is on the housing outer wall 105 in the area of the controls 106 also a table 112 applied, which allows a conversion between meters and feet. For fine-tuning the projection lens the operating elements are made possible by the projection distance encountered in the respective cinema 106 moving a lens group 612 within the extender. A more detailed explanation is in connection with 6B ,

The element 107 acts as a stop when the extender is swung out, ie not active.

As a drive for the process of switching on and off of the extender 202 serves the drive rotary ring 102 , which is outside the lens 100 motor or manually operated. It is in the lens 100 the extender 202 switched between two stable states or swung. The attachment of a toothing on the drive rotary ring 102 facilitates a motor actuation of the Extender-Einschwenkung.

1C shows a partial perspective view of the lens 100 namely the housing section 104 in which the extender 202 is arranged. In addition to the 1A and 1B known elements 106 and 112 Here are more elements of the housing section 104 visible, noticeable. In the housing outer wall 105 there is an adjustment device 114 for centering the swiveled extender, whose function is described below 5 is explained in more detail.

At the in 10 visible, the front part of the lens, front facing 115 of the housing section 104 is a tension spring in the form of a spiral spring 116 appropriate. Furthermore, stands out from this front 115 of the housing section 104 a drive shaft 118 with a gear mounted on it 120 and the pivot axis 121 of the extender.

For the coupling of the housing section 104 with further arranged in the direction of a projection screen housing elements of the lens 100 is a coupling element 122 with a thread 124 available.

The tension spring 116 is with one end 126 with the front 115 of the housing section 104 firmly connected. The other end 128 the tension spring 116 is with a pen 130 connected (see also 2 B ).

The pencil 130 can be within one at the periphery of the front 115 of the housing section 104 located curved groove (cutout) 132 move. By the force of the tension spring 116 The Extender will each be on one of the two stops 107 . 114 fixed. The interaction between the attacks 107 . 114 , the pen 130 and the tension spring 116 leads to a bistable system with regard to the possible positions of the pen 130 , where the groove 132 only serves as a support camp. This process will be in the following 2A and 2 B described.

In each case a perspective view of the assembly 200 of the extender with its mechanics point 2A and 2 B , The entire assembly consists of the actual extender 202 , which are the optical elements for switching the focal length of the projection lens 100 having. Furthermore, for the on and swinging the extender 202 required transmission chain with the gears 204 . 206 . 207 . 208 . 210 . 212 . 214 and 216 , as well as the collapsible panel 218 , The pivoting movement of the extender takes place about the pivot axis 121 ,

These Components must all fit in the given tight installation space of the lens.

Driving the transmission chain of the extender on the part of the drive rotary ring 102 takes place such that the drive rotary ring 102 via a coupled with him drive gear 304 (please refer 3 ) in the gear 120 engages, whereby the power transmission, starting from the drive rotary ring 102 on which gear chain of the extender is realized.

The power consumption of the drive rotary ring 102 via the gear 120 , About the drive shaft 118 the power transmission takes place on the other gears 204 . 206 . 207 . 208 . 210 . 212 . 214 and finally on the extender gear 216 , which frictionally on the extender 202 is attached and via which the power to switch (swinging in or out) directly to the extender 202 is transmitted.

In particular, the gear 208 and the gear 210 realize in cooperation with the gear 212 , the pen 130 and the tension spring 116 the mechanism of switching the extender to one or the other of the two stable states, the pin 130 decentralized, perpendicular to the rotation plane of the gear 212 non-positively on the gear 212 is appropriate. This will be explained in more detail below.

When turning the drive rotary ring 102 becomes the transmission chain of the extender 202 by means of the gears 120 . 204 . 206 . 207 . 208 . 210 . 212 . 214 and 216 set in motion.

The gear 210 is frictionally engaged with the gear 208 connected. As a special feature, the gear 210 a toothed area (gear segment) 220 and a smooth, untoothed area 222 on. The toothed area has 7 teeth. The full toothed wheel would have 22 teeth (see Tab. 1). In this respect, the toothed area covers an angle of about 115 °.

At the time when the gear 212 on the untoothed area 222 of the gear 210 meets, has the tension spring 116 coupled pen 130 at its circular motion on the gear 212 reaches the highest point of the circular path (or in the sideways movement within the groove 112 the maximum 132 the groove 132 achieved) and the tension spring 116 is curious.

If the pen 130 by means of the gear segment 220 and the gear 212 slightly turned beyond the maximum, decouple the gear segment 220 and the gear 212 ,

By the force of the spring 116 become the gears 212 . 214 and 216 moved on. The pencil 130 moves inside the curved groove (cut-out) 132 sideways from the minimum "A" 134 above the maximum 136 to the minimum "B" 138 (see also 1C ). During the movement of the pen 130 inside the groove 132 to the maximum 136 the groove 132 becomes the tension spring 116 curious; excited. After overcoming the maximum 136 the pen moves 130 to the minimum "B" 138 where the extender 202 to the stop 107 strikes. The tension spring 116 takes at least "B" 138 again their resting state.

The same applies to the reverse direction of movement.

This is how the extender reaches 202 one of the two stable states (or the pen 130 reaches the minimum "B" 138 or the minimum "A" 134 (sa description of 1C ) and is determined by the force of the spring 116 held in this position.

When the direction of rotation changes, the gear segment couples 220 back in the gear 212 and bring the extender 202 in the other stable position. Again, the gear segment 220 and the gear 212 again decoupled shortly before the stop.

Through this interaction between the transmission chain of the extender and the tension spring 116 will switch the extender during this process 202 from a stable state to the second stable state, ie the extender 202 is pivoted in or swung out.

The representations in the 2A and 2 B show the extender 202 in swung in (active) state.

3 shows the arrangement of all gears of the extender mechanism in a sectional view shown schematically. When implementing the extender drive by a motor, the engine power from the engine gear 302 on the drive rotary ring 102 transfer. This is frictionally with the drive gear 304 connected. The drive gear 304 transmits the driving force to the gear 120 , The gear 120 is over the axis 118 non-positively with the gear 204 connected. Thus, by the gear 120 over the gear 204 transmit the driving force to the gear chain of the Extender mechanism. About the gears 206 . 207 . 208 . 210 . 212 and 214 The transmission chain is the power transmission to Extenderzahnrad 216 , whereby the above-described pivoting in or out of the extender is effected.

The Reduction ratios the interacting gears of the drive, the output and the transmission chain are in the tables 1 and 2 listed.

In Tab. 1, the ratios of the gears of the transmission are shown. These are in particular in each case the diameter or the number of Teeth.

Tab. 2 shows the values of the gear ratios and drive angle of the gearbox. The following formulas apply to the calculation:
Gear ratio (total): i ges = w 1 / w n respectively. i ges = i 1 · i 2 * ... * i n ,

i₁, i₂, ..., i_n

das Verhältnis der Durchmesser (d) zweier benachbarter, ineinander greifender Zahnräder; und

w₁, w₂, ...

Antriebswinkel und

w_n

den Abtriebswinkel.

Where:

i ₁ , i ₂ , ..., i _n

the ratio of the diameters (d) of two adjacent intermeshing gears; and

w ₁ , w ₂ , ...

Drive angle and

w _n

the output angle.

Drive angle and output angle were based on the mutual dependencies between size of the installation space, minimizing the number of gears and ergonomic drive angle, with manual rotation of the drive rotary ring 102 , chosen.

The 4A to 4C show the extender 202 in different views (frontal and perspective views). In the actual extender 202 is a fixed aperture (not shown) integrated. When swinging the extender 202 therefore needs another aperture 218 be swung. As for the entire design within the case 104 Only limited space is available, is the aperture 218 divided in two. A half 402 is non-positive on the extender construction 202 fastened while the other half 404 pivotable about a swivel axis (screw) 406 is stored. The movable hinged half 404 the aperture 218 is when swinging the extender 202 with the help of a thigh spring 407 unfolded, leaving the aperture 218 their full size unfolds when they place the extender 202 in the beam path of the projection lens 100 is pivoted.

The arm 408 serves with its end plate 508 as a support or stop for the extender 202 in the swung-in state. In the pivoted state, the end plate is located 508 at the stop 114 at. More detailed explanations are given in connection with 5 ,

When swinging in the extender 202 however, the aperture will be 218 folded over a housing stop. Conversely, the aperture works 218 when swinging the extender 202 out again.

On the 4A to 4C is the extender 202 each in a swung out (inactive) state while the aperture 218 swung in (active). Ie. the aperture is unfolded to its full size. In 2A she is folded.

In 4C are also clearly the arrangement of the leaf spring 226 with the eccentric sleeve 224 for adjusting the eccentric to fine-tune the cutting width cover, as well as the clamping screws 228 the leaf spring visible, whose effects in 6B to be discribed.

We come to you now 5 , The extender 202 must be exactly centered in the pivoted state, so that the position of the optical axis of the extender 202 exactly with the optical axis of the projection lens 100 matches, as already mentioned. The exact position (centering) of the extender 202 in the pivoted state is with the adjusting device 114 guaranteed.

A detailed view (sectional view) of the adjusting device 114 for centering the inserted extender 202 is in 5 shown. In the housing outer wall 105 is the adjustment device 114 arranged, which serves as a stop for the swiveled extender. After removing the cover screw 502 and loosening the inside taper bolt 504 is with the now accessible from the outside slotted adjustment screw 506 the exact location of the stop 507 set for the extender in the pivoted state. For this purpose, the slotted adjustment screw (clamping screw) 506 arranged so that it is adjustable from outside the housing by turning with a special tool. During the adjustment process, the extender is replaced by the slotted adjusting screw 506 brought into the desired centered position. The contact of the adjusting screw 506 with the extender 202 is doing over a wear-resistant steel plate 508 realized.

The fixation of the extender adjustment or the slotted adjusting screw 506 done by countering the adjusting screw 506 with the inside cone screw 504 , where the cone screw 504 the slotted adjusting screw 506 spreads and thereby against the thread flanks of the sleeve 510 pressed. By this kind of fixing the slotted adjusting screw 506 an unwanted change of attitude is excluded. The setting described is made at the factory.

6A and 6B show detailed views (section views) of the elements of the fine tuning to the projection distance or the cutting width setting. It shows 6A those elements on the outside wall of the housing 105 are arranged while 6B showing the inside elements.

The cutting width adjustment is done with an eccentric (see 6B ), wherein the default setting is made by the manufacturer.

For presetting the ring disk 110 and the cover screw 606 removed, whereby the - with swung extender - underlying eccentric sleeve 224 becomes accessible. For this purpose, first the cover screw 606 away. Subsequently, a tool with mark in the slot of the eccentric sleeve 224 set. The eccentric sleeve 224 is rotated accordingly until the cutting width coverage is reached, d. h until the projected image is sufficiently sharp, with and without swung-in extenders.

Fine tuning to the projection distance is achieved by shifting a lens group 612 within the extender 202 with the aid of the eccentric sleeve 224 causes (see 6B ). This is a drive sleeve 614 with a frontal groove in the eccentric sleeve 224 rotatably mounted. The eccentric sleeve 224 , in turn, is in the housing of the extender 202 rotatably mounted.

The positional fixation of the eccentric sleeve 224 is by a leaf spring 226 causes, with the help of 4 clamping screws 228 attached to the extender housing and a fixing force on the eccentric sleeve 224 exerts, so that an unintentional adjustment of the eccentric sleeve 224 is prevented.

The lens group 612 is in a version 618 caught. The version 618 sits in the housing of the extender 202 and is axially displaceable in this. The version 618 has a pin 616 , The pin 616 engages in the groove of the driving sleeve 614 one. When turning the eccentric sleeve 224 shifts the drive sleeve 616 lateral and caused by driving the pin 616 an axial displacement of the socket 618 along the optical axis. This causes the desired cutting width adjustment.

Is the cutting coverage achieved the screws 608 and thus the clamping plate 108 Easily released, leaving the washer 110 can be turned. The value of the projection distance at which the slice coverage was set is now rotated to the mark on the tool. After that, the ring disk 110 through the clamping plate 108 by means of screws 608 fixed again. After completion of Schnittweitreckungseinstellung the eccentric sleeve 224 again through the cover screw 606 locked.

This completes the factory preset and the washer 110 properly oriented.

Because the cover screw 606 can be removed, it is possible the shift of the lens group 612 on the mounted lens 100 to be done from the outside. Therefore, the end adjustment can be performed by the user (customer), tailored to the particular distance between his projection lens and the projection screen. This is done for each cinema only once. When the final setting at the customer is again the cover screw 606 removed and with the erwähn th tool with brand the eccentric sleeve 224 turned. The mark is turned to the projection distance in the respective movie theater of the customer, on the ring disk 110 is specified.

The fundamental Focusing the projection lens on the cinema in the respective cinema Projection distance encountered is due to a shift of the entire projection lens within the cinema projector.

• – eine bikonkave Linse 704,
• – eine bikonvexe Linse 706,
• – eine positive Meniskuslinse 707,
• – eine negative Meniskuslinse 707a und
• – eine bikonkave Linse 708.

7 shows a detail view of a vertical sectional view of the housing portion 104 with the extender 202 and the associated mechanics. The power is from the drive rotary ring 102 on the gear 120 and further over the drive shaft 118 on the transmission chain 702 transfer. The pivoting in or out of the extender 202 or the aperture 218 takes place in cooperation between the force of the tension spring 116 and the power transmission via the transmission chain 702 , The pivoting movement of the extender 202 takes place around the axis 121 , In the extender housing 202 are five lenses 704 . 706 . 707 . 707a and 708 arranged, in the order given:

• - a biconcave lens 704 .
• - a biconvex lens 706 .
• - a positive meniscus lens 707 .
• - a negative meniscus lens 707a and
• - a biconcave lens 708 ,

The lenses 707 and 707a are in the version 618 arranged when fine-tuning the crop coverage using the eccentric sleeve 224 is shifted laterally.

100

lens

102

Drive rotary ring (Gear outside)

104

housing section the lens with the extender design

105

Housing outer wall

106

Operation elements to fine-tune the projection distance

107

attack for the swung-out extender

108

Clamping plate for fixing the annular disc 110

110

washer

112

table to adjust the projection distance

114

attack and adjustment device for centering adjustment

115

front 115 of the housing section 104

116

mainspring (Spiral spring)

118

drive shaft

120

gear

121

swivel axis of the extender

122

coupling element

124

thread

126

attachment end the tension spring with the front of the housing section

128

Fastening the tension spring with the concentric on the gear 212 arranged pin

130

asymmetrically arranged on the gear pin for tension spring 116

132

groove (Milled)

134

Minimum "A" of the groove

136

maximum the groove

138

Minimum "B" of the groove

200

module of the extender

202

Extender

204

gear the transmission chain

206

gear the transmission chain

207

gear the transmission chain

208

gear the transmission chain

210

gear the transmission chain (decoupling gear)

212

gear the transmission chain

213

support bearings

214

gear the transmission chain

216

gear the transmission chain (Extender gear)

218

collapsible cover

220

toothed portion (gear segment) of the gear 310

222

non-toothed area of the gear 310

224

Eccentric sleeve for Fine-tune to the projection distance

226

leaf spring

228

turnbuckles the leaf spring

302

motor gear

304

drive gear

402

part the swiveling aperture (attached to the extender design with a force fit half the aperture)

404

Part of the swiveling aperture (pivotable about the pivot axis 406 half of the aperture mounted on the extender design)

406

swivel axis (Screw)

407

Leg spring

408

poor

502

cover screw

504

cone screw

506

slotted Adjusting screw (clamping screw)

507

attack

508

wear-resistant steel plate

510

shell

604

washer

606

cover screw

608

Screws (3 pieces) for fastening of clamping plate 108

612

lens group

614

drive sleeve

616

spigot

618

version, in which the optical assembly is arranged

707

lens

707a

lens

702

transmission chain of the extender

704

lens

706

lens

708

lens

reference numeral symbol Diameter [mm] number of teeth 302 dm 23.00 46 102 d ₀ 132.00 264 304 d ₁ 81,00 162 120 d ₂ 9.00 18 204 d ₃ 8.00 16 206 d ₄ 20.00 40 207 d ₅ 11.00 22 208 d ₆ 23.00 46 210 d ₇ 11.00 22 212 d ₈ 23.00 46 214 d ₉ 11.00 22 216 d ₁₀ 18,00 36 Tab. 1 calculation values Translation (total) i _tot : i _tot = w ₁ / w _n = i ₁ · i ₂ · ... · i _n 1.99 i ₁ = d ₂ / d ₁ 0.11 i ₂ = d ₄ / d ₃ 2.50 i ₃ = d ₆ / d ₅ 2.09 i ₄ = d ₈ / d ₇ 2.09 i ₅ = d ₁₀ / d ₉ 1.64 w ₁ = w _n · i _ges. 91.41 w ₂ = w ₁ / i ₁ 822.71 w ₃ = w ₂ / i ₂ 329.08 w ₄ = w ₃ / i ₃ 157.39 w ₅ = w ₄ / i ₄ 75.27 w _n = w ₅ / i ₅ 46,00 Tab. 2

Claims (4)

Lens with a device for pivoting in an optical assembly ( 202 ) in the beam path of the lens ( 100 ): a) with a lens housing; b) with a drive rotary ring ( 102 ), which is arranged on the outside of the lens housing and designed such that it can be driven by a motor; c) with a gear ( 212 ) and a gear segment ( 220 ); d) by first means ( 118 . 120 . 204 . 206 . 207 . 208 ) for drive transmission from the drive rotary ring ( 102 ) on the gear segment ( 220 ); e) with second means ( 214 . 216 ) for driving transmission from the gear ( 212 ) on the optical assembly ( 202 ); f) where the gear ( 212 ), the gear segment ( 220 ) and the first means for drive transmission are designed such that upon rotation of the drive rotary ring ( 102 ) the gear segment ( 220 ) in the gear ( 212 ) and this turns until the gear segment ( 220 ) from the gear ( 212 ) decoupled; g) where the gear ( 212 ) when it comes from the gear segment ( 220 ) is decoupled by an elastic element ( 116 ) is pulled into a stable position; h) whereby the optical assembly ( 202 ) by the second means ( 214 . 216 ) for drive transmission in the beam path of the lens ( 100 ) is pivoted. Lens according to the preceding claim, characterized in that a diaphragm ( 218 ) with the optical assembly ( 202 ) is coupled in such a way that it enters the beam path of the objective ( 100 ) is pivoted when the optical assembly ( 202 ) upon rotation of the drive rotary ring ( 102 ) from the beam path of the lens ( 100 ) is panned out; and that the aperture ( 218 ) from the beam path of the lens ( 100 ) is pivoted out when the optical assembly ( 202 ) upon rotation of the drive rotary ring ( 102 ) in the beam path of the lens ( 100 ) is pivoted into it; the aperture ( 218 ) is formed in two pieces and one fixed to the optical assembly ( 202 ) connected section and a movable section ( 404 ), which is formed such that the aperture when swinging out of the beam path of the lens ( 100 ) by abutment of the movable section ( 404 ) is folded up on the lens housing. Lens according to one of the preceding claims, characterized in that the lens has an adjustable stop ( 507 ) for the exact definition of the lag of the optical assembly ( 202 ) with respect to the optical axis of the objective ( 100 ) in the pivoted state. Objective according to one of the preceding claims, characterized in that the objective ( 100 ) Medium ( 616 . 614 . 224 . 606 ) for moving a lens group ( 612 ) within the optical assembly ( 202 ) having.