CN103135154A

CN103135154A - Optical filter and lens module utilizing the same

Info

Publication number: CN103135154A
Application number: CN2011103950002A
Authority: CN
Inventors: 柯骏程
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2011-12-02
Filing date: 2011-12-02
Publication date: 2013-06-05
Anticipated expiration: 2031-12-02
Also published as: CN103135154B

Abstract

The invention discloses an optical filter. The optical filter comprises a round glass substrate, the glass substrate is provided with a first surface and a second surface, the first surface is opposite to the second surface, a ring-shaped first anti-fracture structure is arranged on the first surface, a ring-shaped second anti-fracture structure is arranged on the second surface, and the outer diameter of the second anti-fracture structure is greater that the diameter of the glass substrate. The invention further relates to a lens module utilizing the optical filter.

Description

Optical filter and use the camera lens module of this optical filter

Technical field

The present invention relates to a kind of optical filter and use the camera lens module of this optical filter.

Background technology

Existing camera lens module generally includes a lens barrel and one of is contained in this lens barrel and is used for the infrared fileter of filtering infrared light and the lens of a setting adjacent with this infrared fileter.This infrared fileter is processed into by rounding by glass usually, owing to there being machining stress, outside this infrared fileter, peripheral edge is easily cracked, produce glass granules, therefore, when packing this infrared fileter into this lens barrel, outside this infrared fileter within peripheral edge and this lens barrel wall friction chipping, the glass granules of generation drops down onto on these lens thus, thus Image lens module image quality.

Summary of the invention

In view of this, be necessary to provide a kind of camera lens module that prevents the optical filter that fragment drops and use this optical filter.

A kind of optical filter, comprise the circular glass matrix, described glass basis has relative first surface and second surface, one first anti-cracking structure that has annular on described first surface, have annular the second anti-cracking structure on described second surface, outside described the second anti-cracking structure, the footpath is greater than the diameter of described glass basis.

A kind of camera lens module, comprise lens barrel and be contained in described lens barrel as the optical filter of side, described optical filter comprises the circular glass matrix, described glass basis has relative first surface and second surface, described first surface is near the thing side, described second surface is near the picture side, one first anti-cracking structure that has annular on described first surface, have annular the second anti-cracking structure on described second surface, outside described the second anti-cracking structure, the footpath is greater than the diameter of described glass basis and less than footpath outside described lens barrel.

Compared to prior art, the first anti-cracking structure of the embodiment of the present invention and the second anti-cracking structure are fitted on the first surface and second surface of optical filter, and the diameter of the second anti-cracking structure is greater than the internal diameter of lens barrel, so, the first anti-cracking structure and the second anti-cracking structure can increase the intensity of peripheral edge, when packing optical filter into described lens barrel, the first anti-cracking structure and the second anti-cracking structure can prevent wall collision within the glass basis of optical filter and lens barrel and produce glass granules and drop on eyeglass and the space between optical filter and lens barrel is dropped on image sensor.

Description of drawings

Fig. 1 is the schematic diagram of embodiment of the present invention camera lens module.

Fig. 2 is the exploded view of embodiment of the present invention camera lens module.

Fig. 3 is the schematic cross-section of embodiment of the present invention camera lens module.

The main element symbol description

The camera lens module	10
		Lens barrel	11
External thread	110
		Microscope base	12
Internal thread	120
		Eyeglass	13
Optical filter	14
		Glass basis	140
First surface	141
		Second surface	142
The first anti-cracking structure	15
		The second anti-cracking structure	16
Image sensor	17
		Printed circuit board (PCB)	18

Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.

Embodiment

See also Fig. 1, Fig. 2 and Fig. 3, the camera lens module 10 that the embodiment of the present invention provides comprises lens barrel 11, microscope base 12, eyeglass 13, optical filter 14, the first anti-cracking structure 15, the second anti-cracking structure 16, image sensor 17 and printed circuit board (PCB) 18.

Eyeglass 13 and optical filter 14 all are positioned at lens barrel 11.The quantity of eyeglass 13 has varying number and structure along with the difference of camera lens module 10 specifications and performance, for example, and the eyeglass group of one or more compositions.Optical filter 14 can be the optical filter of infrared fileter, cutoff filter or other type according to the performance of camera lens module 10, and is positioned at the least significant end of an end of lens barrel 11 picture sides.

Lens barrel 11 has external thread 110, and microscope base 12 has internal thread 120, and lens barrel 11 is screwed onto in microscope base 12 by external thread 110 and internal thread 120.

So that glass basis 140 has filtering functions, and glass basis 140 is by the round as a ball circle that is processed to form by plated film on a glass basis 140 for optical filter 14.Glass basis 140 has relative first surface 141 and second surface 142, and first surface 141 is near the thing side, and second surface 142 is near the picture side.

Generally equal to be slightly less than the internal diameter of lens barrel 11 due to the diameter of optical filter 14, all represent in full the diameter of optical filter 14 with the internal diameter of lens barrel 11.

The first anti-cracking structure 15 is for toroidal and be fitted on first surface 141, and the second anti-cracking structure 16 is also for toroidal and be fitted on second surface 142.

The external diameter minimum value of the first anti-cracking structure 15 equals the diameter of optical filter 14, and maximal value does not limit, only otherwise affecting other assembly in camera lens module 10 gets final product (for example, spaced ring etc.); The internal diameter size of the first anti-cracking structure 15 is not done restriction, only otherwise the performance that affects optical filter 14 gets final product.

The glue-line that the first anti-cracking structure 15 can form on glass basis 140 for double sticky tape or glue coating, glue-line can be the colloid of arbitrary form, for example, the colloid that transparent UV glue, black hot-setting adhesive or toughness and being difficult for done (as, bubble glue).

When the material of the first anti-cracking structure 15 was adhesive tape, the thickness minimum was 0.15mm, and maximal value does not limit, as long as thickness does not affect other assembly in camera lens module 10; When the material of the first anti-cracking structure 15 was glue, the thickness minimum was 0.03mm, and maximal value does not limit, as long as thickness does not affect other assembly in camera lens module 10.

The D outer diameter 2 of the second anti-cracking structure 16 is greater than the inner diameter D 1 of lens barrel 11 and less than the D outer diameter 3 of lens barrel 11, the maximal value of D outer diameter 2 does not limit, only otherwise other assembly that affects in camera lens module 10 gets final product; The internal diameter size of the second anti-cracking structure 16 is not done restriction, only otherwise the performance that affects optical filter 14 gets final product.

The material of the second anti-cracking structure 16 is corresponding identical with material and the thickness of the first anti-cracking structure 15 with thickness, has identical thickness range under identical material.

In same camera lens module 10, the material of the first anti-cracking structure 15 and the second anti-cracking structure 16 can be the same or different, and thickness can be the same or different.

Printed circuit board (PCB) 18 is used for linking image sensor 17, and is used as the medium of terminal applies product (for example, camera, computing machine etc.), when allowing the terminal applies product need use camera lens module 10, can drive and conducting; In addition, printed circuit board (PCB) 18 also is used as the support plate of camera lens module 10, provides above enough areas can be attached to by microscope base 12.

Because optical filter 14 is processed into by rounding for glass basis 140, outside the rear glass basis 140 of processing, peripheral edge also has the machining stress of remnants, when bumping, is easier to chipping to produce glass fragment.the first anti-cracking structure 15 and the second anti-cracking structure 16 are fitted in respectively on the first surface 141 and second surface 142 of optical filter 14, and the diameter of the second anti-cracking structure 16 is greater than the internal diameter of lens barrel 11, so, the first anti-cracking structure 15 and the second anti-cracking structure 16 can increase the intensity of peripheral edge, when packing optical filter 14 into described lens barrel 11, the first anti-cracking structure 15 and the second anti-cracking structure 16 can prevent wall collision within the glass basis 140 of optical filter 14 and lens barrel 11 and produce that glass fragment drops on eyeglass 13 and the space between optical filter 14 and lens barrel 11 is dropped on image sensor 17.

When the external diameter of the first anti-cracking structure 15 was slightly larger than the diameter of optical filter 14, the first anti-cracking structure 15 that has more can be filled the space between optical filter 14 and lens barrel 11 inwalls, and glass fragment can not fallen on eyeglass 13 by the space yet.

In addition, the first anti-cracking structure 15 and the second anti-cracking structure 16 directly drop on image sensor 17 except the glass fragment that can prevent optical filter 14 raw edges, the portable stain (moving particles) that also optical filter 14 can be produced in the process of transporting clings, and uses and eliminates the bad defective of the quality of image that portable stain causes.

Be understandable that, those skilled in the art also can do other variation etc. and be used in design of the present invention in spirit of the present invention, as long as it does not depart from technique effect of the present invention and all can.The variation that these are done according to spirit of the present invention is within all should being included in the present invention's scope required for protection.

Claims

1. optical filter, comprise the circular glass matrix, described glass basis has relative first surface and second surface, it is characterized in that, one first anti-cracking structure that has annular on described first surface, have annular the second anti-cracking structure on described second surface, outside described the second anti-cracking structure, the footpath is greater than the diameter of described glass basis.

2. optical filter as claimed in claim 1, is characterized in that, outside described the first anti-cracking structure, the footpath is greater than the diameter of described glass basis.

3. optical filter as claimed in claim 1, is characterized in that, the material of described the first anti-cracking structure and the second anti-cracking structure is adhesive tape or glue.

4. optical filter as claimed in claim 3, is characterized in that, described glue is transparent UV glue, black hot-setting adhesive or toughness and is difficult for dried colloid.

5. optical filter as claimed in claim 1, is characterized in that, the thickness of described the first anti-cracking structure and the second anti-cracking structure is more than or equal to 0.03mm.

6. camera lens module, comprise lens barrel and be contained in described lens barrel as the optical filter of side, described optical filter comprises the circular glass matrix, described glass basis has relative first surface and second surface, described first surface is near the thing side, described second surface is near the picture side, it is characterized in that, one first anti-cracking structure that has annular on described first surface, have annular the second anti-cracking structure on described second surface, outside described the second anti-cracking structure, the footpath is greater than the diameter of described glass basis and less than footpath outside described lens barrel.

7. as the camera lens module as described in claim 6, it is characterized in that, the diameter of described the first anti-cracking structure equals or is slightly larger than the diameter of described glass basis.