CN102955218A

CN102955218A - Lens module

Info

Publication number: CN102955218A
Application number: CN2011102546257A
Authority: CN
Inventors: 林君鸿; 蔡泰生; 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: 2011-08-31
Filing date: 2011-08-31
Publication date: 2013-03-06

Abstract

The invention provides a lens module which comprises a lens barrel, and at least one lens and a light filter which are contained in the lens barrel, wherein the lens barrel comprises an object side and an image side which is back to the object side; the light filter is adjacent to the lens and is arranged on the image side of the lens barrel in a way of being relative to the lens; the light filter comprises a substrate; the substrate comprises a first surface facing the object side, and a second surface facing the image side; an anti-reflection film is coated on the first surface; and an infrared filter film is coated on the second surface. According to the lens module, due to the light filter, the anti-reflection film is coated on the first surface facing the object side, and the infrared filter film is coated on the second surface facing the image side, so that the dazzling can be effectively reduced.

Description

The camera lens module

Technical field

The present invention relates to a kind of camera lens module, particularly a kind of camera lens module with optical filter.

Background technology

The camera lens module comprises a lens barrel and is assembled at least one eyeglass and an optical filter in the described lens barrel that this anti-dazzling screen and this eyeglass are adjoining.Traditional optical filter all can established one or more layers infrared filtering film with the plating of the adjoining surface of eyeglass, and it is used for filtering only allows the wavelength be that the visible light of 420nm-680nm passes through through the Infrared of the light of this eyeglass.And when visible light was projecting on the infrared filtering film, nearly about 5% visible light can be reflected, and this part visible light can form dazzle in the image in imaging behind the process Multi reflection.

Summary of the invention

In view of this, be necessary to provide a kind of camera lens module of effective minimizing dazzle.

A kind of camera lens module, it comprises a lens barrel and is contained at least one eyeglass and an optical filter in this lens barrel.This lens barrel comprises the picture side that a thing side and and this thing side are opposing.This optical filter and this eyeglass are adjoining, and are arranged on the picture side of this lens barrel compared to this eyeglass.This optical filter comprises a substrate, and this substrate comprises one toward first surface and the second surface toward the picture side of thing side.Plating is provided with an anti-reflective film on this first surface, and plating is provided with an infrared filtering film on this second surface.

So, this optical filter is by establishing this anti-reflective film and establishing this infrared filtering film toward the second surface plating as side, effectively reducing the generation of dazzle toward the first surface plating of thing side.

Description of drawings

Fig. 1 is the cut-open view of the camera lens module that provides of embodiment of the present invention.

Fig. 2 is the penetrating light spectrogram of the infrared filtering film of the optical filter in the camera lens module among Fig. 1.

Fig. 3 is the reflected light spectrogram of the anti-reflective film of the optical filter in the camera lens module among Fig. 1.

The main element symbol description

The camera lens module	100
		Lens barrel	10

The thing side	11
		The picture side	12
Accommodation space	13
		Eyeglass	20
Optical filter	30
		Substrate	31
First surface	311
		Second surface	312
Anti-reflective film	32
		The infrared filtering film	33
Image sensor	40

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

Embodiment

As shown in Figure 1, be a kind of camera lens module 100 that embodiment of the present invention provides, it comprises a lens barrel 10, at least one eyeglass 20, an optical filter 30 and an image sensor 40.

Described lens barrel 10 is cylindric, and it comprises that a semi-enclosed thing side 11, one are untight as side 12 and one and described thing side 11 and the accommodation space 13 that all is connected as side 12.

Described at least one eyeglass 20 adopts plastic ejection moulding, and it is housed in the described accommodation space 13.In the present embodiment, described eyeglass module 100 comprises two eyeglasses 20, these two eyeglasses 20 are successively set in the lens barrel 10 along the light incident direction, and the thing side 11 of one of them eyeglass 20 contiguous these lens barrel 10 arranges, and the picture side 12 of another eyeglass 20 contiguous these lens barrels 10 arranges.

Described optical filter 30 is housed in the described accommodation space 13, and is arranged on and the sides of the adjoining eyeglass 20 of picture side 12 near picture sides 12.Described optical filter 30 comprises a substrate 31, an anti-reflective film 32 and an infrared filtering film 33.Described substrate 31 comprises one toward first surface 311 and the second surface 312 toward picture side 12 of thing side 11, and described anti-reflective film 33 platings are located on the described first surface 311, and described infrared filtering film 33 platings are located on the described second surface 312.

In the present embodiment, described substrate 31 is made by glass, and its thickness is 0.2mm-0.8mm.Be doped with the CuO particle in this substrate 31, but so that described substrate 31 absorption portion Infrared.Described anti-reflective film 32 comprises that first surface 311 from this substrate 31 is to replacing the 1st to the 4th stacking rete away from these first surface 311 directions, wherein the material of odd number rete is titania, the material of even number tunic is silicon dioxide, and concrete structure is as shown in table 1.Described infrared filtering film 33 comprises that second surface 312 from this substrate 31 is to replacing the 1st to the 54th stacking rete away from these second surface 312 directions, wherein the material of odd number rete is titania, the material of even number rete is silicon dioxide, and concrete structure is as shown in table 2.

Table 1 anti-reflection film structure

Rete	Material	Thickness (nm)
			The 1st rete	TiO2	11.52
The 2nd rete	SIO2	28.93
			The 3rd rete	TiO2	111.15
The 4th rete	SIO2	83.78

Table 2 infrared filtering membrane structure

Rete	Material	Thickness (nm)
			The 1st rete	TiO2	7.28
The 2nd rete	SIO2	18.67
			The 3rd rete	TiO2	86.78
The 4th rete	SIO2	142.53
			The 5th rete	TiO2	80.33
The 6th rete	SIO2	132.59
			The 7th rete	TiO2	81.28
The 8th rete	SIO2	128.33
			The 9th rete	TiO2	81.96
The 10th rete	SIO2	124.34
			The 11st rete	TiO2	83.38
The 12nd rete	SIO2	121.71
			The 13rd rete	TiO2	83.92
The 14th rete	SIO2	123.09
			The 15th rete	TiO2	84.08
The 16th rete	SIO2	124.78
			The 17th rete	TiO2	84.81
The 18th rete	SIO2	134.73
			The 19th rete	TiO2	97.58
The 20th rete	SIO2	192.39
			The 21st rete	TiO2	104.2
The 22nd rete	SIO2	148.59
			The 23rd rete	TiO2	83.66
The 24th rete	SIO2	143.14
			The 25th rete	TiO2	93.6
The 26th rete	SIO2	177.52
			The 27th rete	TiO2	105.92
The 28th rete	SIO2	158.12
			The 29th rete	TiO2	87.79
The 30th rete	SIO2	152.72
			The 31st rete	TiO2	96.32
The 32nd rete	SIO2	174.89
			The 33rd rete	TiO2	104.29
The 34th rete	SIO2	163.45
			The 35th rete	TiO2	100.46
The 36th rete	SIO2	180.21
			The 37th rete	TiO2	115.65
The 38th rete	SIO2	188.01
			The 39th rete	TiO2	117.25
The 40th rete	SIO2	191.74
			The 41st rete	TiO2	118.28
The 42nd rete	SIO2	192.04
			The 43rd rete	TiO2	116.57
The 44th rete	SIO2	192.79
			The 45th rete	TiO2	117.32
The 46th rete	SIO2	190.86
			The 47th rete	TiO2	118.16
The 48th rete	SIO2	190.44
			The 49th rete	TiO2	116.69
The 50th rete	SIO2	191.4
			The 51st rete	TiO2	114.71
The 52nd rete	SIO2	186.74
			The 53rd rete	TiO2	113.18
The 54th rete	SIO2	92.44

Be appreciated that described anti-reflective film 32 also can adopt other material and other film structure to realize antireflecting effect, be not limited to the technical scheme that present embodiment provides; Described infrared filtering film 33 also can adopt other material and other film structure to realize antireflecting effect, be not limited to the technical scheme that present embodiment provides; And described anti-reflective film 32 also can adopt different materials from described infrared filtering film 33, and does not require the material that use is identical.

Described image sensor 40 is used for being projected to its surperficial light and is converted into electrical signals, the picture end 12 of stating lens barrel 10 that it is arranged on, and with described picture end 12 sealings.Described optical filter 30 is between described eyeglass 20 and image sensor 40, and the second surface 312 of described substrate 31 is toward this image sensor 40.

As shown in Figure 2 to Figure 3, when light was projected to optical filter 30 through described eyeglass 20, because the light penetration of described anti-reflective film 32 is higher, meeting was so that most light penetration.When light when being projected to described infrared filtering film 33 behind the described anti-reflective film 32, described infrared filtering film 33 is the Infrared filtering in the light, and allows the visible light of 420nm-680nm pass through.But nearly 5% visible light can be reflected by infrared filtering film 33.And the light reflection that is reflected by infrared filtering film 33 because the reflectivity of the visible light of 32 couples of 420nm-680nm of described anti-reflective film is lower, is lower than 0.5% during to anti-reflective film 32.So that the light that is reflected by infrared filtering film 33 can not be projected to described image sensor 40 again through after the reflection of anti-reflective film 32, thereby effectively reduce the generation of dazzle.

Optical filter in the camera lens module provided by the invention is by establishing this anti-reflective film and establishing this infrared filtering film toward the second surface plating as side, effectively reducing the generation of dazzle toward the first surface plating of thing side.

Be understandable that, for the person of ordinary skill of the art, can make change and the distortion that other various pictures are answered by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.

Claims

1. camera lens module, it comprises a lens barrel and is contained at least one eyeglass and an optical filter in this lens barrel, this lens barrel comprises the picture side that a thing side and and this thing side are opposing, this optical filter and this eyeglass are adjoining, and be arranged on the picture side of this lens barrel compared to this eyeglass, this optical filter comprises a substrate, this substrate comprises one toward first surface and the second surface toward the picture side of thing side, plating is provided with an anti-reflective film on this first surface, and plating is provided with an infrared filtering film on this second surface.

2. camera lens module as claimed in claim 1, it is characterized in that: described camera lens module also comprises an image sensor, and this optical filter is arranged between this eyeglass and this image sensor, and the second surface of this substrate is toward this image sensor.

3. camera lens module as claimed in claim 2, it is characterized in that: described optical filter more is close to this eyeglass compared to this image sensor.

4. camera lens module as claimed in claim 1, it is characterized in that: described anti-reflective film comprises that the first surface from this substrate extremely replaces the 1st to the 4th stacking rete away from this first surface direction, wherein the material of odd number rete is titania, and the material of even number tunic is silicon dioxide.

5. camera lens module as claimed in claim 1, it is characterized in that: described infrared filtering film comprises that the second surface from this substrate extremely replaces the 1st to the 54th stacking rete away from this second surface direction, wherein the material of odd number rete is titania, and the material of even number rete is silicon dioxide.

6. camera lens module as claimed in claim 1, it is characterized in that: the reflectivity of described anti-reflective film is less than 0.5%.

7. camera lens module as claimed in claim 1, it is characterized in that: described substrate is made by glass, and its thickness is 0.2mm-0.8mm.

8. camera lens module as claimed in claim 1, it is characterized in that: described camera lens module comprises two eyeglasses of adjacent setting, the thing side of contiguous this lens barrel of one of them eyeglass arranges, the picture side setting of contiguous this lens barrel of another eyeglass.