CN2896314Y

CN2896314Y - Lens focal-distance compensation structure

Info

Publication number: CN2896314Y
Application number: CN200520136480.0U
Authority: CN
Inventors: 李敏哲
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2005-11-30
Filing date: 2005-11-30
Publication date: 2007-05-02
Anticipated expiration: 2015-11-30

Abstract

The utility model discloses a lens focus compensation structure, which is assembled in the camera lens equipped in the portable electronic product. The lens comprises a lens stand, a drawtube, a lens group and an expansion and shrinkage system and the lens is arranged in any of following clearances through the expansion and shrinkage system: the clearance between the lens stand and the drawtube, the clearance between the lens in the lens group and the clearance between the lens stand the portable electronic product. When the lens is exposed in outdoor temperature change, the focus of the lens in itself will change. Additionally, due to expansion of the lens stand and the drawtube, actual focus of the lens will change. Through carefully calculated expansion or shrinkage of the expansion and shrinkage system, the distance between the placement of the imaging focus of the lens group and the imaging plane can be made up, so that the imaging focus can accurately fall upon the imaging plane and obtain clear image.

Description

Lens focus compensation structure

Technical field

The utility model relates to a kind of camera head, relates in particular to a kind of lens focus compensation structure.

Background technology

At present since in recent years science and technology constantly break through and innovate research and development, make that the portable electronic product of consumer vigorously and fast develops especially in the daily life, for example individual action assistant (PDA), action telecommunication device promptly are commonly called as mobile phone (MOBILE PHONE).And under the consumption mode kenel of seeking change and innovation, the portable electronic product is no longer just possessed single kind of purposes, for example on PDA, mobile phone by camera head is housed, allow above-mentioned portable electronic product have to take pictures, function such as photography, so more can increase the horizontal competition power of the said goods on market.

And camera lens is one of primary clustering in the middle of camera head, and camera lens is made up of microscope base, lens barrel and lens set.Because members such as above-mentioned microscope base, lens barrel and lens set are to adopt miniaturization Design, therefore processing each other is also relative rigorous with the requirement of the assembly grade of tolerance, could allow the focal length of lens set accurately fall within on the imaging plane.When filmed image, image is seen through lens set and converges and be incident upon on the imaging plane, allows imaging plane obtain clear image.

Yet, pick-up lens is on reality is used, it is unintelligible still can image fog to take place, about this defect problem, ask for an interview following narration and explanation: the assembly crewman is when carrying out the assembling of pick-up lens, can carry out adjustments whether the lens set focal length in the camera lens accurately fall within on the imaging plane and test, guarantee that product meets before shipment to stipulate.Because commodity can be sent to all over the world and peddle, use now, and the temperature difference between the various places is very big, in addition be more to have the thing of excessive temperature differentials sooner or later at single area, often changed the volume of each assembly of camera lens because of the temperature difference, promptly influence the assembly position of each assembly, especially the camera lens at this is the miniaturization member, as long as the variation of temperature amount forces slightly greatly and is offset 0.1mm between lens focus and the imaging plane, promptly cause the focal length of lens set accurately to fall within on the imaging plane, and present smudgy clear state image.

The utility model content

The technical problems to be solved in the utility model provides a kind of camera lens, under extraneous temperature variation, its focal length is accurately fallen within on the imaging plane, and obtains sharp image.

For solving the problems of the technologies described above, the utility model discloses a kind of lens focus compensation structure, its assembly is in the middle of the portable electronic product has pick-up lens.And camera lens includes microscope base, lens barrel and lens set and breathing body, and is to be arranged in following 3 gaps any by the breathing body: between microscope base and the lens barrel, between the eyeglass of lens set and between microscope base and the portable electronic product.In view of the above, camera lens is under extraneous temperature variation, the focal length of lens set own can change, add collapsing of microscope base and lens barrel, the actual change apart from focus of camera lens can be by through the breathing measure expansion or the contraction of elaborate calculating, and the distance that can supply lens set imaging focal length drop point and imaging plane, make imaging focal length accurately fall within on the imaging plane, to obtain image clearly.

The utility model has been realized under difference variation owing to taked lens focus compensation structure, can not influenced the pick-up lens focal length and be incident upon imaging plane, and can obtain image clearly.

Description of drawings

Fig. 1 is that portable electronic product of the present utility model assembly has the tool camera lens to compensate the camera lens of structure apart from Jiao.

Fig. 2 is the enforcement view of embodiment 1 of the present utility model.

Fig. 3 is the enforcement view of embodiment 2 of the present utility model.

Fig. 4 is the breathing body flexural deformation synoptic diagram of embodiment 2 of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Embodiment 1

At first as shown in Figure 1, show that one has the portable electronic product 10 of pick-up lens.With the mobile phone is example.And the assembly of lens focus compensation structure is in the middle of the pick-up lens 20 of portable electronic product 10.Pick-up lens 20 includes a microscope base 21, a lens barrel 22, a lens set 23 and three breathing bodies 24, as shown in Figure 2, and wherein:

Microscope base 21 is positioned at directly over the imaging plane 11 of portable electronic product 10, and microscope base 21 has an engagement groove 211, and the trough wall surface of engagement groove 211 has helicitic texture, and engagement groove 211 groove bottom centre are provided with a hollow channel 212;

Lens barrel 22 has one in conjunction with ring portion 221, and has helicitic texture in conjunction with the outer ring surface of ring portion 221, and lens barrel 22 is to be screwed together in conjunction with ring portion 221 in the engagement groove 211 of microscope base 21;

Lens set 23 includes two pieces of eyeglasses 231, and eyeglass 231 configured in parallel are in lens barrel 22, and just in time is positioned at the place, hollow channel 212 tops of microscope base 21, and the imaging focal length drop point a of lens set 23 can be positioned on the imaging plane 11;

Breathing body 24, be along with microscope base 21 can linearly expand and the member that shrinks with the temperature variation of lens barrel 22, be example here with member in the form of a ring, 24 assembly of breathing body fit between portable electronic product 10 surface and microscope base 21 bottoms, engagement groove 211 groove bottom of microscope base 21 and combining between ring portion 221 bottom surfaces of lens barrel 22, and between the eyeglass 231 of lens set 23.

As shown in Figure 2: when the ambient temperature variable quantity be on the occasion of the time, can cause camera lens 20 each member position skew, and cause lens set 23 imaging focal length drop points towards imaging plane 11 bias internals, make to be offset to drop point b (the imaging focal length drop point a of lens set 23 is positioned on the imaging plane at normal temperatures) by the former drop point a of imaging focal length.

Yet, when above-mentioned condition takes place, can be by breathing body 24 along with microscope base 21 can linearly expand and the member that shrinks with lens barrel 22 temperature variation, allow breathing body 24 suitably expand, and pass to adjust engagement groove 211 groove bottom of position, microscope base 21 between portable electronic product 10 and the microscope base 21 and the position between ring portion 221 bottom surfaces that combines of lens barrel 22, and position between the eyeglass 231 of lens set 23.And then allow the imaging focal length of lens set 23 return to former drop point a by drop point b, make into lens set 23 imaging focal lengths and accurately fall within once more on the imaging plane 11, to obtain image clearly.

Embodiment 2

As shown in Figure 3, be to utilize groove edge at microscope base 21 engagement grooves 211 to be provided with the two relative grooves 213 that set, install groove 222 relatively and be provided with two at the top of lens barrel 22, and microscope base 21 sets installing between groove 222 groove bottom of groove 213 groove bottom and lens barrel 22 and is horizontal, and join and be fitted with a double-deck breathing body 24 in the groove 222 groove bottom mutual group that install that microscope base 21 sets groove 213 groove bottom and lens barrel 22, breathing body 24 is made of 241,242 of the lamellar bodies of two different materials, and has not collinearity breathing ability respectively.

As shown in Figure 3 and Figure 4: when the ambient temperature variable quantity be on the occasion of the time, can cause each member positions skew of camera lens 20, and cause lens set 23 imaging focal length drop points towards imaging plane 11 bias internals, make to be offset to drop point b by the former drop point a of imaging focal length;

When above-mentioned condition takes place, can be by breathing body 24 along with microscope base 21 can linearly expand and the member that shrinks with lens barrel 22 temperature variation, allow two lamellar bodies 241,242 of breathing body 24 set towards the installing groove 222 of lens barrel 22 and outwards suitably expansion bending (being lamellar body 241,242 ends outwards expands and crooked towards centre) of groove 213, recover as for the situ in the microscope base 21 and drive this lens barrel 22 simultaneously by microscope base 21.And then allow the imaging focal length of lens set 23 return to former drop point a by drop point b, make into lens set 23 imaging focal lengths and accurately fall within once more on the imaging plane 11, to obtain image clearly.

The utility model in the foregoing description 1 and embodiment 2, all be with temperature variation under state, the compensation of lens focus is described; And when temperature variation is negative value, only need to do with described that flowing mode is opposite to get final product, so do not adding to give unnecessary details at this; The breathing body can be materials such as steel, aluminium or plastics in addition.

Claims

1, a kind of lens focus compensation structure, its assembly are in the middle of the pick-up lens that the portable electronic product has, and described portable electronic product has an imaging plane, and it is characterized in that: described camera lens includes:

One microscope base;

One lens barrel that combines with the microscope base assembly;

One lens set is made of at least one piece of eyeglass, and is disposed in the lens barrel, and lens set imaging focal length drop point is positioned at the imaging plane of portable electronic product; And

At least one breathing body is arranged at one of following 3 gaps: between microscope base and the lens barrel, between the eyeglass of lens set and between microscope base and the portable electronic product.

2, lens focus compensation structure according to claim 1, it is characterized in that: described microscope base has an engagement groove; Described lens barrel has one in conjunction with ring portion, and described lens barrel is to be screwed together in conjunction with ring portion in the engagement groove of microscope base; And the setting of breathing body fits in the engagement groove groove bottom of microscope base and combining between the ring portion bottom surface of lens barrel.

3, lens focus compensation structure according to claim 1, it is characterized in that: the groove edge of described microscope base engagement groove is provided with at least one groove that sets, the top of described lens barrel is provided with at least one groove that installs, microscope base sets installing of groove groove bottom and lens barrel and is between the groove groove bottom horizontally, and microscope base sets the groove groove bottom mutual group that installs of groove groove bottom and this lens barrel and joins and be fitted with a breathing body.

4, lens focus compensation structure according to claim 3, it is characterized in that: the breathing body is made of the lamellar body of two different materials, and each lamellar body is respectively not collinearity breathing ability.