CN100351661C

CN100351661C - Single focus lens module

Info

Publication number: CN100351661C
Application number: CNB021594252A
Authority: CN
Inventors: 黄有执
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2002-12-31
Filing date: 2002-12-31
Publication date: 2007-11-28
Anticipated expiration: 2022-12-31
Also published as: CN1512210A

Abstract

The present invention relates to single focus lens modules, namely an imaging lens assembly with a mechanical shutter, which comprises the following modules counting from the object side to the image side: a presetting shutter module, an imaging lens and a lens mount, wherein the imaging lens is connected with the lens mount through screw threads; the presetting shutter module overlaps with the imaging lens; during assembly, the shutter module can be assembled after the focus of the imaging lens is regulated to the proper position with the screw threads. In this way, the present invention can simplify the structure of the single focus lens modules and increase the overall assembly precision, and therefore, enhances the overall quality and the accuracy of the function of image interception.

Description

The single-focus lens module

Technical field

The present invention is relevant with the single-focus lens module of digital photography equipment, is meant especially about a kind of single-focus lens module.

Background technology

Known to the skill of just going ahead of the rest, the conventional digital video camera uses each part of single-focus lens module, and it is a sampling image lens: wherein include the mechanical shutter structure by the arrangement of forming of thing side to the picture side in regular turn; Two microscope base assemblies: wherein comprise focus adjusting mechanism; Three electronics capture assemblies: wherein, photosensory assembly can be CCD or CMOS; Because mechanical shutter need pass through mechanical drive and conduction of current structure, be connected with main circuit board, so the ornaments direction must be fixed during use, can't rotate arbitrarily camera lens optical axis, therefore, during assembling for image position is correctly fallen within on the photosensory assembly, to obtain good image, need be on the microscope base assembly, setting can make sampling image lens not rotate, the focus adjusting mechanism that straight ahead retreats; But on the practice, this structure has following shortcoming:

1. focus adjusting mechanism, in order to make camera lens forward-reverse smoothly, each forms assembly must have the gap, thereby make between sampling image lens and photosensory assembly, produce the geometric error of accumulation, from sampling image lens between photosensory assembly, the mechanism element that uses is many more, geometric error is serious more, does not keep vertical thereby make between camera lens optical axis and photosensory assembly, and imaging surface produces.

2. the mechanical shutter body places sampling image lens, makes the group between the capture eyeglass upright, need also be not easy to keep the consistance of optical axis in the manufacturing, thereby be reduced the picture resolving power by the both sides assembling of shutter.

3. the mechanical shutter body places sampling image lens, because the mechanical shutter body, need actuating structure, interfere therefore existing design for avoiding actuating structure and focus adjusting mechanism to produce, usually actuating structure is positioned over before the aperture position, thereby the single-focus lens module thickness is increased.

Summary of the invention

Fundamental purpose of the present invention is to provide a kind of single-focus lens module, and its main idea is as follows: an aperture position with imaging lens, place the place ahead of first eyeglass, and can make mechanical shutter and imaging lens thus, be separated into two standalone modules; Two because imaging lens separates with the shutter body, therefore can use helicitic texture, and imaging lens is directly combined with microscope base, and uses rotation tomography camera lens mode to focus, and omits unnecessary focus adjusting mechanism part; After three focusings were finished, the shutter body directly was overlapped on the imaging lens, thereby guarantees the ornaments direction of shutter body, can not change because of the focusing process; Shutter disk does not change because of the focusing process to the lens aperture distance yet simultaneously; Thus, can promote assembly precision, improve the overall image quality.

For achieving the above object, the technical solution used in the present invention is as follows:

A kind of single-focus lens module includes the imaging mirror group structure of mechanical shutter, its by the thing side to being a preposition shutter module in regular turn as arranging forming of side, an imaging lens and a microscope base; Wherein:

This imaging lens has an aperture and is positioned at before first eyeglass, and this imaging lens uses screw thread to combine with this microscope base;

This preposition shutter module activates structure by shutter body and shutter and is constituted; The shutter body overlaps mutually with imaging lens in addition, includes base plate in this shutter body, upper cover plate, blade and fixed blade; This shutter activates structure and is positioned at after the blade, this this body front surface of shutter simultaneously, to the lens barrel front surface distance of imaging lens less than 2.0mm.

This shutter activate structure rear end to the distance of this body front surface of shutter less than 12mm.

This shutter activates constructs by the solenoid controlled driving lever for the blade that promotes in the shutter body.

This blade rear end to aperture distance less than 1mm.

This microscope base overlaps mutually with an electronics capture assembly.

This preposition shutter module includes two and activates structure, controls the movable and big or small aperture change action of shutter of this preposition shutter module; This two shutter activates structure then each free solenoid and a driving lever constitutes again.

A kind of Electrofax wherein comprises the single-focus lens module with mechanical shutter, and is a preposition shutter module in regular turn by arranging Electrofax surface to forming of sense electronics optical assembly, an imaging lens and a microscope base; Wherein:

This imaging lens has an aperture and is positioned at before first eyeglass, and this imaging lens is to use screw thread to combine with this microscope base, and the focal length of Xing Chenging is less than 15mm simultaneously;

This preposition shutter module activates structure by shutter body and shutter and is constituted; The shutter body overlaps mutually with imaging lens in addition, includes base plate, upper cover plate, blade and fixed blade in this shutter body; In addition this shutter activates structure and is positioned at after the blade, this this body front surface of shutter simultaneously, to the lens barrel front surface distance of imaging lens less than 2.0mm.

This shutter module to the distance of the aperture position of this single-focus lens module less than 1mm.

This microscope base overlaps mutually with an electronics capture assembly.

Further set forth, for making aforementioned single-focus lens module, reach the good quality of image, this single-focus lens module is still needed and is had following characteristics:

1. the focal length of camera lens is less than 15mm: because imaging lens is promptly fixing after focusing, so the focal length of camera lens is little, just can obtain the enough depth of field, when making actual use, can exempt the action of focusing.

2. the actuating of shutter module structure is positioned at after the blade: so can save single-focus lens module space, reach compact purpose.

3. the front surface of shutter module, with the lens barrel front surface of imaging lens, distance is less than 2.0mm: so can avoid the light openings of shutter assembly excessive, cause the shift motion lengthening of blade, speed reduces.

4. the actuating structure of shutter module bottom, with this body front surface of shutter, distance is less than 12mm: so can avoid shutter module actuating structure, produce with electronics capture assembly and microscope base and interfere.

5. the shutter module can be used solenoid, and the control driving lever promotes blade: so can simplify the shutter braking maneuver, shutter speed is increased.

6. shutter module, aperture position apart from the single-focus lens module, distance is less than 1mm: the shift motion of blade is dwindled, thereby shutter speed is increased, in the time of also can making simultaneously the single-focus lens module switch to little aperture, the image field edge can not produce shading, and relative brightness can not decay suddenly.

7. microscope base overlaps mutually with electronics capture assembly: so can reduce the connection assembly of imaging lens to electronics capture assembly, thereby increase assembly precision.

Use beneficial effect of the present invention to be:

1. when putting the aperture of shutter module before use, as long as prepare with the lens set fit; Can not influence eyeglass intercepting imaging function if any the center line that departs from the single-focus lens module yet.

2. eyeglass and microscope base adopt spiral lamination fit mode, and it can be when adjusting focal length, complex component are become very simple, degree of accuracy is improved, and then improve total quality, assembly precision overall precision.

Description of drawings

The assembled sectional view of Fig. 1 a preferred embodiment of the present invention.

The assembled sectional view of another preferred embodiment of Fig. 2 the present invention.

Fig. 3 the present invention is the assembled sectional view of a preferred embodiment again.

The primary clustering symbol description:

Single-focus lens module 10 preposition shutter modules 20

Activate structure 21 solenoids 211

Driving lever 212 shutter bodies 22

Upper cover plate 222

Blade 223 fixed blades 224

Imaging lens 30 lens barrels 31

Lens set 32 apertures 33

First eyeglass, 321 microscope bases 40

Electronics capture assembly 50

Distance A distance (B) distance C

Single-focus lens module 60 preposition shutter modules 61

Activate structure 611 612

Solenoid 614 driving levers 615

Imaging lens 62 microscope bases 63

Single focus mirror

Head module 70 preposition shutter modules 71

Imaging lens 72 microscope bases 73

Aperture 74 first eyeglasses 75

Embodiment

At first see also shown in Figure 1, the single-focus lens module 10 that a preferred embodiment of the present invention provided, the imaging mirror group structure that includes mechanical shutter, it is preposition shutter module 20, one imaging lens 30 and a microscope base 40 by the thing side to forming arrangement as side in regular turn; Wherein:

This preposition shutter module 20 activates structure 21 and one shutter body 22 by a shutter and is constituted, and this shutter activates structure 21 and includes a solenoid 211 and a driving lever 212, for this preposition shutter module of control; This shutter body 22 includes upper cover plate 222, blade 223, fixed blade 224, and base plate 225, and this shutter body 22 and imaging lens 30 (Taking Lens) overlap joint; This shutter activates structure 21 and is positioned at after the blade 223, simultaneously these shutter module 20 front surfaces to the front surface distance A of imaging lens 30 less than 2.0mm, and this shutter activate structure 21 rear ends to the distance (B) of shutter body 22 front surfaces less than 12mm; This shutter activates structure 21 and pulls this blade 223 by these solenoid 211 these driving levers 212 of control in addition; And this blade 223 to the distance C of these single-focus lens module 10 formed apertures less than 1mm.

This imaging lens 30 includes a lens barrel 31 and a lens set 32, and the aperture 33 of this imaging lens 30 is positioned at before first eyeglass 321, and this imaging lens 30 uses screw threads to combine with this microscope base 40, and the focal length of Xing Chenging is less than 15mm simultaneously.

This microscope base 40 is overlapped with an electronics capture assembly 50, and for example charge-coupled image sensor charge-coupled device is called for short CCD, and this imaging lens 30 adopts spiral lamination fit mode with this microscope base 40.

Then see also Fig. 2, the single-focus lens module 60 that the present invention's second preferred embodiment is provided, by the thing side is a preposition shutter module 61 as arranging forming of side in regular turn extremely, one imaging lens 62 and a microscope base 63, because these members are close with the member summary of the first preferred embodiment single-focus lens module 10, do not give unnecessary details in detail in this appearance, and its difference is; This preposition shutter module 61 is provided with two and activates structure 611,612, and 611,612 each free solenoids 614 are constructed in this two actuating and a driving lever 615 constitutes; This shutter activates the shutter activity of structure 611 these preposition shutter modules 61 of control, and this shutter activates the then big or small aperture change action of this preposition shutter module 61 of control of structure 612.

The third embodiment of the present invention as shown in Figure 3, promptly a kind of single-focus lens module 70 is preposition shutter module 71, one imaging lens 72 and a microscope base 73 by arranging thing side to forming of imaging side position in regular turn; Single-focus lens module 70 has an aperture 74, be made of the fixed blade of shutter module, and be positioned at before first eyeglass 75, and this imaging lens 72 uses screw threads to combine with this microscope base 73, and the focal length of Xing Chenging is less than 15mm simultaneously.

By above each preferred embodiment explanation, the characteristics that can conclude single-focus lens module of the present invention are as follows with the progressive effect of obviously promoting:

Claims

1. single-focus lens module includes the imaging mirror group structure of mechanical shutter, its by the thing side to being a preposition shutter module in regular turn as arranging forming of side, an imaging lens and a microscope base; Wherein:

2. according to claim 1 a described single-focus lens module, this shutter in the aforementioned preposition shutter module activate structure rear end to the distance of this body front surface of shutter less than 12mm.

3. according to claim 1 a described single-focus lens module, wherein this shutter activates and constructs by the solenoid controlled driving lever for the blade that promotes in the shutter body.

4. according to claim 1 a described single-focus lens module, wherein this blade rear end to the aperture distance less than 1mm.

5. according to claim 1 a described single-focus lens module, wherein this microscope base overlaps mutually with an electronics capture assembly.

6. according to claim 1 a described single-focus lens module, wherein this preposition shutter module includes two actuating structures, controls the movable and big or small aperture change action of shutter of this preposition shutter module; This two shutter activates structure then each free solenoid and a driving lever constitutes again.

7. an Electrofax wherein comprises the single-focus lens module with mechanical shutter, and is a preposition shutter module in regular turn by arranging Electrofax surface to forming of sense electronics optical assembly, an imaging lens and a microscope base; Wherein:

8. Electrofax according to claim 7, tool this preposition shutter module in its single-focus lens module, wherein this shutter activate construct rear end to the distance of this body front surface of shutter less than 12mm.

9. Electrofax according to claim 7, this shutter in its single-focus lens module activates constructs by the solenoid controlled driving lever for the blade that promotes in the shutter body.

10. Electrofax according to claim 7, wherein this blade rear end to aperture distance less than 1mm.

11. Electrofax according to claim 7, this microscope base in its single-focus lens module overlaps mutually with an electronics capture assembly.

Activate structure 12. Electrofax according to claim 7, the preposition shutter module of this in its single-focus lens module include two, control the movable and big or small aperture change action of shutter of this preposition shutter module; This two shutter activates structure then each free solenoid and a driving lever constitutes again.