CN205643830U - Wide angle optical lens - Google Patents

Abstract

The utility model provides a wide angle optical lens relates to an imaging optics camera lens. A wide angle optical lens, includes the first lens that sets gradually, second lens, third lens, fourth lens and feels optical chip from the object space to the image space, first lens with set up the diaphragm between the second lens, first lens with the second lens is glass spherical lens, third lens with the fourth lens is plastic aspherical mirror piece, the focus of first lens, second lens, third lens and fourth lens be respectively the burden, just, just, the burden. The utility model discloses the use lens is small in quantity, and is with low costs, small, and resolution ratio is high, can satisfy application demands such as infrared confocal and adaptation changes in ambient temperature.

Description

A kind of wide-angle optical lens

Technical field

This utility model relates to a kind of imaging optical lens, particularly relates to a kind of wide-angle optical lens being applied to the aspects such as driving recording, security protection, video conferencing system.

Background technology

The needs built along with safe city, security lens demand is gradually increased by market.Security protection application surface is more and more extensive, more and more higher to hardware requirement, especially to the requirement low cost of optical lens, small size, can high-low temperature resistant etc..Camera lens product quality the most on the market is uneven, in all multi objective such as resolution, overall dimensions, infrared night vision effect, variation of ambient temperature not out of focus, is difficult to the high-performance camera lens finding various function to have concurrently.

Occurring in that a small amount of high-resolution, the camera lens of small size on the market, but this type of system often number of lenses is many, infrared weak effect, the angle of visual field are little, simultaneously along with variation of ambient temperature, also can produce empty burnt phenomenon, not meet the market demand.

Utility model content

Technical problem to be solved in the utility model is, for the deficiencies in the prior art, it is provided that a kind of wide-angle optical lens, uses number of lenses few, low cost, and volume is little, and resolution is high, can meet infrared confocal and adapt to the application demands such as variation of ambient temperature.

For solving above-mentioned technical problem, this utility model be the technical scheme is that

A kind of wide-angle optical lens, including the first eyeglass set gradually from the object side to the image side, the second eyeglass, the 3rd eyeglass, the 4th eyeglass and sensitive chip, between described first eyeglass and described second eyeglass, diaphragm is set, described first eyeglass and described second eyeglass are glass spherical lens, described 3rd eyeglass and described 4th eyeglass are plastic cement aspherical lens, and the focal length of described first eyeglass, the second eyeglass, the 3rd eyeglass and the 4th eyeglass is the most negative, positive, positive and negative.

Further, described first eyeglass is biconcave lens, and described second eyeglass is biconvex lens, and described 3rd eyeglass is biconvex lens, and described 4th eyeglass is the meniscus lens bending towards thing side.

Further, described first eyeglass, the second eyeglass and the 3rd eyeglass are low dispersion eyeglass, and described 4th eyeglass is high dispersion eyeglass.

Further, described first lens and described second lens are ED eyeglass.

Further, optical filter and sensitive chip protection glass are set gradually between described 4th eyeglass and described sensitive chip.

Further, the size of described sensitive chip is 1/2.5 ", the resolution of described sensitive chip is 1,300,000～5,000,000 pixels.

Compared with prior art, the beneficial effects of the utility model are as follows:

1, this utility model can realize high definition resolution, small size, infrared confocal, the change of adaptation operating ambient temperature simultaneously.

2, the stop position of system is optimized by this utility model, is so beneficial to reduce light and enters the chief ray angle of sensitive chip sensor, i.e. chief ray incident angle CRA is little, and imaging effect is more preferable.

3, angle of view angle of the present utility model reaches more than 130 °, simultaneously by using ED material, it is achieved without the effect of purple boundary.

4, camera lens of the present utility model uses glass plastic cement mix and match, has both ensured performance design needs, reduces again cost simultaneously, is beneficial to produce in enormous quantities, meets the market demand.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings this utility model is described in further detail.

Fig. 1: structural representation of the present utility model；

Wherein, 1-the first eyeglass, 2-the second eyeglass, 3-the 3rd eyeglass, 4-the 4th eyeglass, 5-sensitive chip, 6-diaphragm, 7-optical filter, 8-sensitive chip protection glass.

Detailed description of the invention

In order to be more fully understood that this utility model, fairly set out content of the present utility model below in conjunction with embodiment further, but protection content of the present utility model is not limited solely to the following examples.In the following description, a large amount of concrete details is given to provide and this utility model being understood the most thoroughly.It will be apparent, however, to one skilled in the art that this utility model can be carried out without these details one or more.

Embodiment 1

As it is shown in figure 1, a kind of wide-angle optical lens, it is made up of the eyeglass within 4 pieces, glass lens and plastic lens mixes and constitute, in the present embodiment, be made up of 4 pieces of eyeglasses.

This optical system includes the first eyeglass the 1, second eyeglass the 2, the 3rd eyeglass the 3, the 4th eyeglass 4 and the sensitive chip 5 set gradually from the object side to the image side；Diaphragm 6 it is provided with between the first eyeglass and the second eyeglass；Optical filter 7 and sensitive chip protection glass 8 is set gradually between the 4th eyeglass 4 and sensitive chip 5；Described first eyeglass 1 and the second eyeglass 2 are spherical lens, and its material is glass material；Described 3rd eyeglass 3 and the 4th eyeglass 4 are non-spherical lens, and its material is plastic material.

Described first eyeglass 1 be focal length be negative biconcave lens, described second eyeglass 2 be focal length be positive biconvex lens, described 3rd eyeglass 3 be focal length be positive biconvex lens, described 4th eyeglass 4 be focal length be the negative meniscus lens bending towards thing side.

Described first eyeglass the 1, second eyeglass 2 uses ED eyeglass；3rd eyeglass 3 uses low dispersion eyeglass, the 4th eyeglass to use high dispersion eyeglass, distributed rationally by such eyeglass, it is achieved while Radix Rumicis, high-resolution, the out of focus of correction Infrared, day and night, it is adaptable to 24 hours monitoring demands.

In this utility model, owing to the first eyeglass 1 uses double-concave negative lens, have and reverse the light injected from thing side so that the light angle entering the second eyeglass 2 more relaxes, it is achieved thereby that wide-angle performance.

Generally lying in centre position from the diaphragm of the most similar optical system different, the stop position of this optical system is between the first eyeglass 1 and the second eyeglass 2, and such design advantageously reduces light and enters the CRA value of sensor so that imaging effect is more preferably；The most also effectively reduce the size of system, meet the market requirement to small size.

Owing to this wide-angle optical lens introduces glass, the structure of plastic lens mix and match, while reducing cost, aspheric employing makes the volume of system reduce；Simultaneously need to draw attention, use variation of ambient temperature, the bad phenomenon of focus drifting may be caused.In order to overcome this problem, this utility model by the following technical solutions: constituted temperature-compensating battery of lens by the 3rd lens 3 and the 4th lens 4.

1, when ambient temperature rises: the 3rd eyeglass 3 has positive focal power, burnt elongated after thus eyeglass necessarily causes；Accordingly, it would be desirable to introduce an eyeglass have the function lens making rear Jiao shorten, the 4th eyeglass 4 is owing to having negative focal power, and when ambient temperature rises, rear Jiao shortens.

2, when ambient temperature declines: the 3rd eyeglass 3 has positive focal power, thus eyeglass necessarily causes rear Jiao to shorten；It is thus desirable to introduce an eyeglass have the function lens making rear Jiao elongated, the 4th eyeglass 4 is owing to having negative focal power, when ambient temperature rises, rear burnt elongated.

In the design process, by adjusting the 3rd eyeglass 3 and the focal power ratio of the 4th eyeglass 4, it is achieved the effect that after two eyeglasses, burnt variable quantity compensates each other.

This utility model optical system under technique scheme, focal position in the ambient temperature range of-40 DEG C ~+80 DEG C, 20 DEG C of working environment not out of focus of relative room temperature, remain that high definition is differentiated at high and low temperature environment.

Native system uses wide spectrum design, carries out chromatic aberration correction, it is ensured that image sharpness and color reducibility, make the effect that the effect of imaging is directly observed close to human eye in 435nm ~ 656nm spectral region.Correct the near infrared spectrum aberration of 850nm ~ 940nm, it is achieved infrared confocal effect simultaneously.

Setting sensitive chip 5 below at the 4th eyeglass 4, the size of described sensitive chip is 1/2.5 ", the resolution of described sensitive chip can meet the high definition resolution of the different demands such as 720p ~ 5,000,000 pixels simultaneously；Meanwhile, between the 4th eyeglass 4 and sensitive chip 5, insert optical filter 7, to filter the light wave outside design wave band.In addition consider the aberration that sensitive chip protection glass 8 introduces, be corrected for the most in the design process.

Name angle of visual field be 130 °, resolution be 5,000,000 pixels, machinery overall length 18.5mm, can be in the actual design embodiment of-40 DEG C ~ 80 DEG C of normal work:

Table 1 system data

Face is numbered	Face type	Radius	Thickness	Material	Conic
						OBJ	Object plane	Infinity	Infinity		0
1	Sphere	-15	0.7	H-QK3L	0
						2	Sphere	2.734	5.225		0
Diaphragm	Sphere	Infinity	0.5	H-FK61	0
						4	Sphere	5	3.35		0
5	Sphere	-6.126	0.24		0
						6	Aspheric surface	8	2.36	E48R	16.428
7	Aspheric surface	-2	0.06		-0.972
						8	Aspheric surface	-1.5	0.65	PC	-3.776
9	Aspheric surface	-5.2	2.96		-45.96
						11	Sphere	Infinity	0.8	K9	0
12	Sphere	Infinity	2		0
						Image planes	Sphere	Infinity			0

In table 1, face numbering 1,2 represents the positive and negative of the first eyeglass, the material selection H-QK3L of the first eyeglass；Face numbering 3,4 represents the positive and negative of the second eyeglass, the material selection H-FK61 of the second eyeglass；Face numbering 6,7 represents the positive and negative of the 3rd eyeglass, the material selection E48R of the 3rd eyeglass；Face numbering 8,9 represents the positive and negative of the 4th eyeglass, the material selection PC of the 4th eyeglass；Face numbering 11,12 refers to the positive and negative of optical filter, and its base material is K9 glass.

Table 2 asphericity coefficient:

Numbering	E4	E6	E8	E10	E12
						6	-9.6958e-3	-1.5315e-3	-2.0687e-4	4.4987e-6	-3.0324e-5
7	0.02675	-0.01567	4.23985e-3	-6.4541e-4	4.0124e-6
						8	3.7156e-3	-2.2973e-3	-5.8512e-4	3.8815e-4	-3.7056e-5
9	0.02963	-4.6935e-3	1.56625e-4	5.62097e-5	-1.0635e-6

Finally illustrate is, above example is only in order to illustrate the technical solution of the utility model and unrestricted, other amendment or equivalents that the technical solution of the utility model is made by those of ordinary skill in the art, without departing from the spirit and scope of technical solutions of the utility model, all should contain in the middle of right of the present utility model.

Claims (6)

1. a wide-angle optical lens, including the first eyeglass set gradually from the object side to the image side, the second eyeglass, the 3rd eyeglass, the 4th eyeglass and sensitive chip, it is characterized in that: between described first eyeglass and described second eyeglass, diaphragm is set, described first eyeglass and described second eyeglass are glass spherical lens, described 3rd eyeglass and described 4th eyeglass are plastic cement aspherical lens, and the focal length of described first eyeglass, the second eyeglass, the 3rd eyeglass and the 4th eyeglass is the most negative, positive, positive and negative.

2. a kind of wide-angle optical lens as claimed in claim 1, it is characterised in that: described first eyeglass is biconcave lens, and described second eyeglass is biconvex lens, and described 3rd eyeglass is biconvex lens, and described 4th eyeglass is the meniscus lens bending towards thing side.

3. a kind of wide-angle optical lens as claimed in claim 1, it is characterised in that: described first eyeglass, the second eyeglass and the 3rd eyeglass are low dispersion eyeglass, and described 4th eyeglass is high dispersion eyeglass.

4. a kind of wide-angle optical lens as claimed in claim 3, it is characterised in that: described first eyeglass and described second eyeglass are ED eyeglass.

5. a kind of wide-angle optical lens as described in any one of claim 1 ~ 4, it is characterised in that: set gradually optical filter and sensitive chip protection glass between described 4th eyeglass and described sensitive chip.

6. a kind of wide-angle optical lens as claimed in claim 5, it is characterised in that: the size of described sensitive chip is 1/2.5 ", the resolution of described sensitive chip is 1,300,000～5,000,000 pixels.