CN101556365A

CN101556365A - Lens module

Info

Publication number: CN101556365A
Application number: CNA2008103010584A
Authority: CN
Inventors: 简士哲
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: 2008-04-11
Filing date: 2008-04-11
Publication date: 2009-10-14

Abstract

The invention provides a lens module, comprising a lens barrel, a lens set arranged inside the lens barrel and a transparent lens cover. The lens cover is fixed at one end of the lens barrel, and is provided with an infrared cut-off filter unit.

Description

The camera lens module

Technical field

The present invention relates to a kind of camera lens module, relate in particular to a kind of camera lens module easy to assembly, simple in structure.

Background technology

At present, the camera lens module of most digital cameras is made of parts such as lens set, lens barrel and image sensor.As shown in Figure 1, a kind of traditional camera lens module 100 comprises lens set 120, lens barrel 140 and image sensor 160.Lens set 120 comprises the eyeglass 1201 that is used to focus on and is used for the ultrared cutoff filter of filtering (IR-cut filter) 1202 that eyeglass 1201 and cutoff filter 1202 are housed in lens barrel 140 inside.Image sensor 160 is installed in lens barrel 140 1 ends, and it comprises image sensor chip 1601, cover plate 1602 and substrate 1603.Wherein, image sensing chip 1601 is fixed on the substrate 1603, and cover plate 1602 is made by transparent materials such as glass, and the edge of cover plate 1602 is fixed on the edge of substrate 1603, and image sensing chip 1601 is encapsulated between cover plate 1602 and the substrate 1603.Pass cover plate 1602 after the filtration of the optical image signal that enters lens barrel 140 through the focusing of eyeglass 1201 and infrared intercepting filter 1202 and arrive image sensing chips 1601, image sensing chip 1601 is converted to the electron image signal with optical signalling.

Because the eyeglass 1201 of camera lens module 100, IR-cut filter optical filter 1202 and cover plate 1602 are generally made by glass or plastics, weight and volume are bigger, need occupy bigger assembly space and make troubles in the use, and increase the production cost of camera lens module 100.

Summary of the invention

In view of this, be necessary to provide a kind of camera lens module easy to assembly, simple in structure.

A kind of camera lens module comprises lens barrel, is arranged on the interior lens set of described lens barrel and the lens cap of printing opacity, and described lens cap is fixed on an end of described lens barrel, and described lens cap is provided with the infrared ray cut filter unit.

Compared with prior art, the IR-cut filter unit of the embodiment of the invention is arranged on the lens cap that is fixed on the lens barrel, rather than be arranged in the lens barrel, thereby make that the volume simple in structure, lens barrel in the lens barrel is less, and the camera lens module is easy to assembly, simple in structure.

Description of drawings

Fig. 1 is the synoptic diagram of camera lens module in the prior art.

Fig. 2 is the synoptic diagram of first embodiment of the invention camera lens module.

Fig. 3 is the synoptic diagram of second embodiment of the invention camera lens module.

Fig. 4 is the synoptic diagram of third embodiment of the invention camera lens module.

Fig. 5 is the synoptic diagram of fourth embodiment of the invention camera lens module.

Embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

See also Fig. 2, the camera lens module 10 that first embodiment of the invention provides comprises lens barrel 12, lens set 14, image sensor 16 and lens cap 18.

Lens barrel 12 is the cylindrical structure of hollow, and lens set 14 is contained in the lens barrel 12.

Image sensor 16 comprises image sensor chip 161, cover plate 162 and substrate 163.Wherein, image sensing chip 161 is fixed on the substrate 163, and cover plate 162 is made by transparent materials such as glass, and cover plate 162 is fixed on the substrate 163, so that image sensing chip 161 is encapsulated between cover plate 162 and the substrate 163.Cover plate 162 is installed in lens barrel 12 1 ends, and the light that enters lens barrel 12 arrives image sensing chip 161 through passing cover plate 162 after the lens set 14.

The end relative with image sensor 16 that lens cap 18 is fixed on lens barrel 12, it comprises body 180 and infrared ray cut filter unit 182.Body 180 is the tube structure of being made up of base 181 and sidewall 183, and IR-cut filter unit 182 is arranged on the base 181, and sidewall 183 is fixed on the lens barrel 12.

Base 181 has opposite first 1810 and second surface 1811, and first surface 1810 is away from lens barrel 12, and second surface 1811 is near lens barrel 12.In the present embodiment, infrared ray cut filter unit 182 is positioned on the whole first surface 1810, and infrared ray cut filter unit 182 also can be positioned on the zone of first surface 1810 corresponding lens set 14 opticators.Light incides on the lens set 14 then through infrared ray cut filter unit 182, body 180.

Certainly, infrared ray cut filter unit 182 also can be positioned on the second surface 1811.

Certainly, also can coat black paint to increase attractive in appearance or to prevent that light from entering in the zone outside infrared ray cut filter unit 182 corresponding lens set 14 opticators.

Body 180 can be made to increase the penetrability of light by transparent materials such as optics plastic material or optical glass.

Infrared ray cut filter unit 182 can be for being bonded in the optical filter on the body 180, also can be to adopt as electron beam evaporation methods to be deposited on thin layer on the body 180.

Because IR-cut filter unit 182 is positioned at lens barrel 12 outsides, can reduces the height of lens barrel 12, and make simple in structure in the lens barrel 12.

As shown in Figure 3, the camera lens module 20 that provides of second embodiment of the invention comprises lens barrel 12, lens set 14, image sensor 16 and lens cap 26.

Camera lens module 20 is with the difference of camera lens module 10: lens cap 26 comprises flat body 260 and the infrared ray cut filter unit 262, the anti-fingerprint film (anti-finger) 264 that are arranged on the body 260.

Body 260 has opposite first 2601 and second surface 2602, and first surface 2601 is away from lens barrel 12, and second surface 2602 is near lens barrel 12.Infrared ray cut filter unit 262 is positioned on the second surface 2602, and anti-fingerprint film 264 is positioned on the first surface 2601.

Selectively, infrared ray cut filter unit 262 and anti-fingerprint film 264 are successively set on the first surface 2601; Lens cap 26 also can adopt the structure identical with lens cap 18.

As shown in Figure 4, the camera lens module 30 that provides of third embodiment of the invention comprises lens barrel 12, lens set 14, image sensor 16 and lens cap 36.

Camera lens module 30 is with the difference of camera lens module 10: lens cap 36 comprises flat body 360 and is arranged on the infrared ray cut filter unit 362 on the body 360, anti-fingerprint film 364, antireflecting coating (AR coating) 366.

Body 360 has opposite first 3601 and second surface 3602, and incident light incides body 360 inside through first surface 3601, again through second surface 3602 outgoing.Infrared ray cut filter unit 362, antireflecting coating 366 and anti-fingerprint film 364 are successively set on the first surface 3601, and anti-fingerprint film 366 is positioned at outermost layer.

Selectively, anti-fingerprint film 364 is positioned on the first surface 3601, and antireflecting coating 366 and cutoff filter 362 are successively set on the second surface 3602, and perhaps infrared ray cut filter unit 362 is arranged on the second surface 3602, is positioned on the infrared ray cut filter unit 362 on the antireflecting coating 366.

Certainly, infrared ray cut filter unit 362, anti-fingerprint film 364, antireflecting coating 366 are not limited only to above-mentioned several arrangement mode, also can be other arrangement mode, as long as make anti-fingerprint film 364 be positioned at the outermost layer of first surface 3601.

As shown in Figure 5, the camera lens module 40 that provides of fourth embodiment of the invention comprises lens barrel 12, lens set 14, image sensor 16 and lens cap 46.

Camera lens module 40 is with the difference of camera lens module 30: the body 460 of lens cap 46 has a groove 4601, groove 4601 is circular configurations of the optical axis coincidence of center and lens set 14, infrared ray cut filter unit 462 is arranged in the groove 4601, and antireflecting coating 466, anti-fingerprint film 464 are successively set on the infrared ray cut filter unit 462.

Certainly, also can replace the groove 4601 on the body 460 to be used for holding infrared ray cut filter unit 462 by through hole.

In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims

1. a camera lens module comprises lens barrel, is arranged on the lens set in the described lens barrel, and it is characterized in that: further comprise the lens cap of a printing opacity, described lens cap is fixed on an end of described lens barrel, and described lens cap is provided with the infrared ray cut filter unit.

2. camera lens module as claimed in claim 1 is characterized in that: described lens cap comprises a flat body, and described body has a first surface away from described lens barrel, and described infrared ray cut filter unit is arranged on the described first surface.

3. camera lens module as claimed in claim 1 is characterized in that: described lens cap comprises a flat body, and described body has a second surface near described lens barrel, and described infrared ray cut filter unit is arranged on the described second surface.

4. camera lens module as claimed in claim 1 is characterized in that: the cylindrical shell of described lens cap for forming by base and sidewall, and described base has a first surface away from described lens barrel, and described infrared ray cut filter unit is arranged on the described first surface.

5. camera lens module as claimed in claim 1 is characterized in that: the cylindrical shell of described lens cap for being made up of base and sidewall, described base have a second surface near described lens barrel, and described infrared ray cut filter unit is arranged on the described second surface.

6. camera lens module as claimed in claim 1 is characterized in that: described lens cap has the accommodation space of a circle, and the center of described accommodation space and the optical axis coincidence of described lens set, described accommodation space are used for holding described infrared ray cut filter unit.

7. as each described camera lens module of claim 2 to 6, it is characterized in that: further comprise an antireflecting coating that is positioned on the described infrared ray cut filter unit.

8. camera lens module as claimed in claim 7 is characterized in that: described infrared ray cut filter unit is optical filter or is deposited on film on the described lens cap.

9. camera lens module as claimed in claim 7 is characterized in that: further comprise an anti-fingerprint film, described anti-fingerprint film is arranged on the described lens cap, and incident light at first incides described lens set then through described anti-fingerprint film.