CN103135154B

CN103135154B - Optical filter and use the camera lens module of this optical filter

Info

Publication number: CN103135154B
Application number: CN201110395000.2A
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: 2016-09-14
Anticipated expiration: 2031-12-02
Also published as: CN103135154A

Abstract

A kind of optical filter, including circular glass matrix, described glass basis has relative first surface and second surface, there is on described first surface one first anti-cracking structure of annular, having annular second anti-cracking structure on described second surface, the external diameter of described second anti-cracking structure is more than the diameter of described glass basis.The invention still further relates to a kind of camera lens module using above-mentioned 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 the infrared fileter for filtering infrared light and the lens being disposed adjacent with this infrared fileter.This infrared fileter is generally processed into by rounding by glass, owing to there is machining stress, the peripheral edge of this infrared fileter is fragile to be split, produce glass granules, therefore, when this infrared fileter is loaded this lens barrel, within the peripheral edge of this infrared fileter and this lens barrel, wall friction is chipping, thus the glass granules of generation drops down onto on these lens, thus Image lens module image quality.

Summary of the invention

In view of this, it is necessary to provide one to prevent the optical filter that fragment drops and the camera lens module using this optical filter.

A kind of optical filter, including circular glass matrix, described glass basis has relative first surface and second surface, there is on described first surface one first anti-cracking structure of annular, having annular second anti-cracking structure on described second surface, the external diameter of described second anti-cracking structure is more than the diameter of described glass basis.

A kind of camera lens module, including lens barrel and the optical filter being contained in described lens barrel image side, described optical filter includes circular glass matrix, described glass basis has relative first surface and second surface, described first surface is near thing side, and described second surface, near image side, described first surface has one first anti-cracking structure of annular, there is annular second anti-cracking structure, the external diameter of the described second anti-cracking structure diameter more than described glass basis and the external diameter less than described lens barrel on described second surface.

Compared to prior art, first anti-cracking structure of the embodiment of the present invention and the second anti-cracking structure are fitted on first surface and the second surface of optical filter, and the diameter of the second anti-cracking structure is more than the internal diameter of lens barrel, so, first anti-cracking structure and the second anti-cracking structure can increase the intensity of peripheral edge, when optical filter is loaded described lens barrel, the first anti-cracking structure and the second anti-cracking structure are possible to prevent the inwall collision of the glass basis of optical filter and lens barrel and produce glass granules and the space that falls between eyeglass and filtered and lens barrel falls on image sensor.

Accompanying drawing explanation

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.

Main element symbol description

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

Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

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

Eyeglass 13 and optical filter 14 are respectively positioned in lens barrel 11.The quantity of eyeglass 13 has varying number and structure along with camera lens module 10 specification and the difference of performance, such as, and the eyeglass group of one or more compositions.Optical filter 14 is according to the optical filter that the performance of camera lens module 10 can be infrared fileter, cutoff filter or other type, and is positioned at the least significant end of one end of lens barrel 11 image side.

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

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

Owing to the diameter of optical filter 14 is generally equivalent to be slightly less than the internal diameter of lens barrel 11, all represent the diameter of optical filter 14 in full with the internal diameter of lens barrel 11.

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

The external diameter minima of the first anti-cracking structure 15 is equal to the diameter of optical filter 14, and maximum is then not intended to, if other assembly not affected in camera lens module 10 (such as, spacer ring etc.)；The internal diameter size of the first anti-cracking structure 15 does not limits, as long as not affecting the performance of optical filter 14.

The glue-line that first anti-cracking structure 15 can be two-sided tape or glue coating is formed on glass basis 140, glue-line can be any form of colloid, such as, transparent UV glue, black hot-setting adhesive or toughness and be difficult to the colloid (e.g., bubble glue) done.

When the material of the first anti-cracking structure 15 is adhesive tape, the minimum 0.15mm of thickness, maximum is then not intended to, as long as thickness does not affect other assembly in camera lens module 10；When the material of the first anti-cracking structure 15 is glue, the minimum 0.03mm of thickness, maximum is then not intended to, as long as thickness does not affect other assembly in camera lens module 10.

The outer diameter D 2 internal diameter D1 more than lens barrel 11 of the second anti-cracking structure 16 and the outer diameter D 3 less than lens barrel 11, the maximum of outer diameter D 2 is then not intended to, if other assembly not affected in camera lens module 10；The internal diameter size of the second anti-cracking structure 16 does not limits, as long as not affecting the performance of optical filter 14.

The material of the second anti-cracking structure 16 is corresponding identical with the material of the first anti-cracking structure 15 and thickness 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 as the medium of terminal applies product (such as, camera, computer etc.), when allowing terminal applies product need to use camera lens module 10, can drive and turn on；Additionally, printed circuit board (PCB) 18 is also as the support plate of camera lens module 10, it is provided that enough areas can be attached to above by microscope base 12.

Owing to optical filter 14 is processed into by rounding for glass basis 140, after processing, the peripheral edge of glass basis 140 also has the machining stress of remnants, when colliding, is easier to chipping to produce glass fragment.First anti-cracking structure 15 and the second anti-cracking structure 16 are fitted on first surface 141 and the second surface 142 of optical filter 14 respectively, and the diameter of the second anti-cracking structure 16 is more than the internal diameter of lens barrel 11, so, first anti-cracking structure 15 and the second anti-cracking structure 16 can increase the intensity of peripheral edge, when optical filter 14 is loaded described lens barrel 11, first anti-cracking structure 15 and the second anti-cracking structure 16 are possible to prevent the inwall collision of the glass basis 140 of optical filter 14 and lens barrel 11 to produce the glass fragment space between eyeglass 13 and filtered 14 and lens barrel 11 that falls and fall on image sensor 17.

When the external diameter of the first anti-cracking structure 15 is slightly larger than the diameter of optical filter 14, the first anti-cracking structure 15 having more can fill the space between optical filter 14 and lens barrel 11 inwall, and glass fragment also will not be fallen on eyeglass 13 by space.

It addition, the first anti-cracking structure 15 and the second anti-cracking structure 16 are in addition to can preventing the glass fragment of optical filter 14 raw edges from directly dropping on image sensor 17, also can be by optical filter 14 produced portable stain (moving during transporting Particles) cling, use and eliminate the defect that the quality of image that portable stain caused is bad.

It is understood that those skilled in the art also can do other change etc. in spirit of the present invention is used in the design of the present invention, without departing from the technique effect of the present invention.These changes done according to present invention spirit, within all should being included in scope of the present invention.

Claims

1. a camera lens module, including lens barrel and the optical filter being contained in described lens barrel image side, described optical filtering Sheet includes that circular glass matrix, described glass basis have relative first surface and second surface, described First surface is near thing side, and described second surface is near image side, it is characterised in that on described first surface There is one first anti-cracking structure of annular, described second surface has annular second anti-cracking structure, described The external diameter of the second anti-cracking structure internal diameter more than described lens barrel and the external diameter less than described lens barrel.

2. the camera lens module as described in claim 1, it is characterised in that described first anti-cracking structure Diameter is equal or slightly larger than the diameter of described glass basis.