CN106154523B - Zoom lens - Google Patents

Abstract

The present invention is that a kind of zoom lens includes one first lens group, an aperture and a second lens group by object side to image side sequential.First lens group has negative refractive power, and is made of one first eyeglass, one second eyeglass and a third eyeglass, and refractive power is sequentially negative, is negative, positive, and the third eyeglass and the second eyeglass gluing form the balsaming lens of a negative refractive power.The second lens group has positive refractive power, and it is made of one the 4th eyeglass, one the 5th eyeglass, one the 6th eyeglass, one the 7th eyeglass, one the 8th eyeglass and one the 9th eyeglass, refractive power be sequentially it is positive and negative, just, it is positive and negative, just, and the 6th eyeglass and the 5th eyeglass gluing form the balsaming lens of a negative refractive power；In addition, first lens group can move between the object side and the aperture, which can move between the aperture and the image side.

Description

Zoom lens

Technical field

The present invention is related with optical lens；Particularly relate to a kind of zoom lens.

Background technique

The rapid advances of semiconductor technology in recent years, so that the picture of such as monitor optical equipment imaging is more and more thin It causing, the requirement of resolution ratio and picture element that the related camera lens for making above-mentioned optical equipment is applicable in also and then is promoted, in more detail, Wide viewing angle is required when camera lens short focus, and also needs meet low manufacturing cost and light and short the needs of remaining unchanged.

In addition to this, above-mentioned optical equipment is when daytime, light source when camera lens system is using visible light as image capture, and When to night, then it can change the light source using near infrared light as image capture, but since the environment light of certain setting place is excessively confused Secretly, in order to make the picture after imaging have enough brightness, so the camera lens of above-mentioned optical equipment usually requires to meet large aperture Design, and cooperate the architecture design two lens groups being respectively arranged at before and after aperture simultaneously, it prays to reach zoom and optics above-mentioned Demand (such as United States Patent (USP) US8395847, US8184379, USB085474, US7652827).

However, the design of above-mentioned patent is all the light applied to piece width (image format) 1/3 inch to 1/2.7 inch Learn photosensitive element.But when the picture element that optics photosensitive element uses now is more than 5,000,000, due to single picture element size (pixel Size) small again will to will cause sense brightness bad, so the design piece width of optics photosensitive element can become larger, but after piece width increases, leads to Often in order to which good design, manufacture, camera lens volume then can and then amplify, cost of manufacture is caused also and then to get higher, and the demand with market It runs in the opposite direction.

Therefore know as shown in the above description, the application in market toward high picture element high-order application development when, existing zoom lens Design do not attain yet perfect, can not effectively meet the market demand, and the anxiety still having much room for improvement.

Summary of the invention

In view of this, the purpose of the present invention be used to provide it is a kind of can be from wide-angle side to taking the photograph the change for remotely all having large aperture characteristic Zoom lens, and it is applicable to the large scale optics photosensitive element such as 1/2 inch, and its camera lens volume remains to keep light and short, And overall length and existing lens design are similar, and can reach the aberration of correction visible light to infrared light simultaneously, moreover it is possible to keep high solution Degree and large aperture, while having the advantages that easy to manufacture, assembling.

For edge to reach above-mentioned purpose, zoom lens provided by the present invention includes by an object side to an image side and along an optical axis One first lens group, an aperture and a second lens group for sequential.Wherein, which has negative refractive power, and by this One first eyeglass, one second eyeglass and a third eyeglass of object side to the image side sequential are formed；First eyeglass tool There is negative refractive power；Second eyeglass has negative refractive power；The third eyeglass have positive refractive power, and with the second eyeglass gluing shape At a balsaming lens with negative refractive power；In addition, first eyeglass, second eyeglass and the third eyeglass can in the object side and Along the optical axis synchronizing moving between the aperture.The second lens group has positive refractive power, and by the object side to the image side sequential One the 4th eyeglass, one the 5th eyeglass, one the 6th eyeglass, one the 7th eyeglass, one the 8th eyeglass and one the 9th eyeglass formed； 4th eyeglass has positive refractive power；5th eyeglass has negative refractive power；6th eyeglass has a positive refractive power, and with this Five eyeglass gluings form a balsaming lens with negative refractive power；7th eyeglass has positive refractive power；8th eyeglass has Negative refractive power；9th eyeglass has positive refractive power；In addition, the 4th eyeglass, the 5th eyeglass, the 6th eyeglass, the 7th Eyeglass, the 8th eyeglass and the 9th eyeglass can be between the aperture and the image sides along the optical axis synchronizing moving.

In this way, can remain to keep light and short in camera lens volume through above-mentioned lens design, and overall length and existing Some lens designs are similar, and are applicable to the large scale optics photosensitive element such as 1/2 inch, and it is visible to reach correction simultaneously Light to infrared light aberration, moreover it is possible to keep high solution degree and large aperture, and have the advantages that simultaneously it is easy to manufacture, assemble.

Detailed description of the invention

Figure 1A is first embodiment zoom lens in the eyeglass architecture diagram of wide-angle side；

Figure 1B is first embodiment zoom lens in taking the photograph long-range eyeglass architecture diagram；

Fig. 2A is first embodiment in the distortion figure of wide-angle side；

Fig. 2 B is first embodiment in the curvature of field figure of wide-angle side；

Fig. 2 C is first embodiment in the longitudinal spherical aberration figure of wide-angle side；

Fig. 2 D is first embodiment in taking the photograph long-range distortion figure；

Fig. 2 E is first embodiment in taking the photograph long-range curvature of field figure；

Fig. 2 F is first embodiment in taking the photograph long-range longitudinal spherical aberration figure；

Fig. 3 A is second embodiment zoom lens in the eyeglass architecture diagram of wide-angle side；

Fig. 3 B is second embodiment zoom lens in taking the photograph long-range eyeglass architecture diagram；

Fig. 4 A is second embodiment in the distortion figure of wide-angle side；

Fig. 4 B is second embodiment in the curvature of field figure of wide-angle side；

Fig. 4 C is second embodiment in the longitudinal spherical aberration figure of wide-angle side；

Fig. 4 D is second embodiment in taking the photograph long-range distortion figure；

Fig. 4 E is second embodiment in taking the photograph long-range curvature of field figure；

Fig. 4 F is second embodiment in taking the photograph long-range longitudinal spherical aberration figure；

Fig. 5 A is 3rd embodiment zoom lens in the eyeglass architecture diagram of wide-angle side；

Fig. 5 B is 3rd embodiment zoom lens in taking the photograph long-range eyeglass architecture diagram；

Fig. 6 A is 3rd embodiment in the distortion figure of wide-angle side；

Fig. 6 B is 3rd embodiment in the curvature of field figure of wide-angle side；

Fig. 6 C is 3rd embodiment in the longitudinal spherical aberration figure of wide-angle side；

Fig. 6 D is 3rd embodiment in taking the photograph long-range distortion figure；

Fig. 6 E is 3rd embodiment in taking the photograph long-range curvature of field figure；

Fig. 6 F is 3rd embodiment in taking the photograph long-range longitudinal spherical aberration figure；

Fig. 7 A is fourth embodiment zoom lens in the eyeglass architecture diagram of wide-angle side；

Fig. 7 B is fourth embodiment zoom lens in taking the photograph long-range eyeglass architecture diagram；

Fig. 8 A is fourth embodiment in the distortion figure of wide-angle side；

Fig. 8 B is fourth embodiment in the curvature of field figure of wide-angle side；

Fig. 8 C is fourth embodiment in the longitudinal spherical aberration figure of wide-angle side；

Fig. 8 D is fourth embodiment in taking the photograph long-range distortion figure；

Fig. 8 E is fourth embodiment in taking the photograph long-range curvature of field figure；

Fig. 8 F is fourth embodiment in taking the photograph long-range longitudinal spherical aberration figure；

Fig. 9 A is the 5th embodiment zoom lens in the eyeglass architecture diagram of wide-angle side；

Fig. 9 B is the 5th embodiment zoom lens in taking the photograph long-range eyeglass architecture diagram；

Figure 10 A is the 5th embodiment in the distortion figure of wide-angle side；

Figure 10 B is the 5th embodiment in the curvature of field figure of wide-angle side；

Figure 10 C is the 5th embodiment in the longitudinal spherical aberration figure of wide-angle side；

Figure 10 D is the 5th embodiment in taking the photograph long-range distortion figure；

Figure 10 E is the 5th embodiment in taking the photograph long-range curvature of field figure；

Figure 10 F is the 5th embodiment in taking the photograph long-range longitudinal spherical aberration figure.

It is all in wavelength of light is 587 nanometers it should be noted that above-listed distortion figure, curvature of field figure and longitudinal spherical aberration figure When resulting optical simulation datagram.

[symbol description]

1~5 zoom lens

The first lens group of G1

L1 the first eyeglass L2 the second eyeglass L3 third eyeglass

L23 balsaming lens

ST aperture

G2 second lens group

The 6th eyeglass of the 4th the 5th eyeglass L6 of eyeglass L5 of L4

L56 balsaming lens

The 9th eyeglass of the 7th the 8th eyeglass L9 of eyeglass L8 of L7

Z optical axis

Specific embodiment

For that can be illustrated more clearly that the present invention, hereby lifts following embodiment and cooperate diagram detailed description is as follows, and figure please be join Shown in 1A and Figure 1B, Fig. 3 A and Fig. 3 B, Fig. 5 A and Fig. 5 B, Fig. 7 A and Fig. 7 B, Fig. 9 A and Fig. 9 B, the respectively present invention first to the The zoom lens 1~5 of five embodiments is in wide-angle side and eyeglass framework when taking the photograph long-range, in which:

The zoom lens 1~5 is separately included by an object side a to image side and along the one first of an optical axis Z sequential Lens group G1, an aperture ST and a second lens group G2.In addition, according to the requirements of use, (such as light in the zoom lens 1~5 Between circle position, second lens group G2 and the image side etc.) it is also provided with an optical filter (Optical Filter), to filter out Unnecessary noise light, and can reach the purpose of improving optical efficiency.Certainly, the position of optical filter can change according to different designs demand Become, without being limited with above content.Wherein:

The first lens group G1 has negative refractive power, and by the one first eyeglass L1 of the object side to the image side sequential, one Second eyeglass L2 and a third eyeglass L3 are formed, and first eyeglass L1, the second eyeglass L2 of first lens group G1 with Third eyeglass L3 can be between the object side and aperture ST along optical axis Z synchronizing moving.

In more detail, which is the meniscus with negative refractive power, and its convex surface S1 is towards the object side, And concave surface S2 is towards the image side.

The second eyeglass L2 is the biconcave lens with negative refractive power.

The third eyeglass L3 be meniscus with positive refractive power, and its convex surface S4 towards the object side and with second mirror The concave surface S4 of piece L2 towards the image side binds, and forms a balsaming lens L23 with negative refractive power, and it is noted that It is binded through the above-mentioned third eyeglass L3 by the second eyeglass L2 of negative refractive power and positive refractive power and is arranged in first mirror Design after piece L1 can effectively achieve color difference (Axial chromatic on axis caused by eliminating the first lens group G1 Aberration effect).

Second lens group G2 has positive refractive power, and by one the 4th eyeglass L4 of the object side to the image side sequential, one 5th eyeglass L5, one the 6th eyeglass L6, one the 7th eyeglass L7, one the 8th eyeglass L8 and one the 9th eyeglass L9 are formed, and should The 4th eyeglass L4, the 5th eyeglass L5, the 6th eyeglass L6, the 7th eyeglass L7, the 8th eyeglass L8 of second lens group G2 And the 9th eyeglass L9 can use adjustment respectively varifocal mirror between aperture ST and the image side along optical axis Z synchronizing moving First 1~5 imaging magnification, so that respectively wide-angle side (Wide) is presented to taking the photograph long-range (Telephoto) in the zoom lens 1~5 Multiplying power variation.

In addition, when those zoom lens 1~5 adjust enlargement ratio, and drive second lens group G2 in the image side and the light When moving between circle ST along optical axis Z, those zoom lens 1~5 feelings of imaging surface offset can occur because optical power changes Shape, mobile first lens group G1 can reach the effect of imaging surface correction.

In more detail, the 4th eyeglass L4 is biconvex lens with positive refractive power, and secondly mirror surface S7, S8 are all non- Spherical face.

5th eyeglass L5 is the meniscus with negative refractive power, and its convex surface S9 is towards the object side, and concave surface S10 is then Towards the image side.

6th eyeglass L6 is biconvex lens with positive refractive power, and towards the convex surface S10 of the object side and the 5th mirror The concave surface S10 of piece L5 towards the image side binds, and forms a balsaming lens L56 with negative refractive power, and in designing the glue herein The purpose for closing lens L56, is that the optical effect that can pass through balsaming lens L56 lens structure effectively inhibits second lens group G2 Color difference on generated axis.

7th eyeglass L7 is meniscus with positive refractive power, and its convex surface S13 is towards the image side, and concave surface S12 Towards the object side.It is noted that it is same with positive refractive power to rearrange design after the 6th eyeglass L6 of positive refractive power The purpose of design of 7th eyeglass L7 is effectively share refractive power (diopter) of the 6th eyeglass L6 in optical system, In addition to it can reinforce inhibiting aberration, also can avoid the 6th eyeglass L6 causes eyeglass excessively to bend (over because refractive power is excessive Bending situation), and then the manufacture difficulty of the 6th eyeglass L6 can be effectively reduced and the zoom lens 1~5 can be promoted Error tolerances when assembled.

8th eyeglass L8 is the meniscus with negative refractive power, and its convex surface S14 is towards the object side, and concave surface S15 Towards the image side.

9th eyeglass L9 is meniscus with positive refractive power, and its convex surface S16 is towards the object side, and concave surface S17 Towards the image side, and secondly mirror surface S16, S17 are all non-spherical surface.

For the optical performance for effectively promoting the zoom lens 1~5, the zoom lens 1 of the first to the 5th embodiment of the invention The optical axis Z of~5 each lens surfaces passes through the radius of curvature R at place, each mirror surface with next mirror surface (or imaging surface) on optical axis Z Distance D, the refractive index Nd of each eyeglass, the Abbe number Vd of each eyeglass and respectively the zoom lens 1~5 in wide-angle side and is taken the photograph remote Effective focal length F, aperture coefficient and angle of visibility FOV (2 ω) when journey, sequentially as shown in table one to table five:

Table one

Table two

Table three

Table four

Table five

In addition, in each lens of the zoom lens 1~5 of each embodiment, described non-spherical surface S7, S8, S16 and The surface indentation degree z of S17 is as obtained by following equation:

Wherein:

Z: the recess degree of non-spherical surface；

C: the inverse of radius of curvature；

H: off-axis the half of surface is high；

K: circular cone coefficient；

A~J: each level number of the off-axis half high h on surface.

Each non-spherical surface S7, S8, S16 and S17's of the zoom lens 1~5 of first to the 5th embodiment of the invention Asphericity coefficient k and each level number A~J, sequentially as shown in table six to table ten:

Table six

Surface	S7	S8	S16	S17
					K	-0.138474	-31.272872	0.234838	7.893315
A	-0.544808E-04	-0.880676E-04	-0.503960E-03	-0.478494E-04
					B	-0.215397E-05	0.454072E-05	0.924699E-04	-0.232453E-04
C	0.646151E-06	0.141997E-05	-0.319191E-04	0.839586E-05
					D	-0.875376E-07	-0.408980E-06	0.547581E-05	-0.127910E-05
E	0.761707E-08	0.491724E-07	-0.574897E-06	0.820410E-07
					F	-0.417598E-09	-0.316300E-08	0.370587E-07	-0.108783E-08
G	0.134290E-10	0.113039E-09	-0.143630E-08	-0.132746E-09
					H	-0.226067E-12	-0.211235E-11	0.305605E-10	0.641355E-11
J	0.151567E-14	0.160880E-13	-0.274574E-12	-0.866017E-13

Table seven

Surface	S7	S8	S16	S17
					K	-0.513642	8.016546	0.245354	13.390444
A	0.365372E-02	0.572497E-02	-0.217232E-01	-0.209672E-01
					B	-0.233783E-02	-0.339488E-02	0.153173E-01	0.221801E-01
C	0.619799E-03	0.821513E-03	-0.446234E-02	-0.924364E-02
					D	-0.862037E-04	-0.105136E-03	0.702758E-03	0.200316E-02
E	0.697377E-05	0.788006E-05	-0.669465E-04	-0.251754E-03
					F	-0.340360E-06	-0.358354E-06	0.401634E-05	0.190487E-04
G	0.987865E-08	0.973878E-08	-0.149904E-06	-0.856074E-06
					H	-0.157029E-09	-0.145567E-09	0.320136E-08	0.210562E-07
J	0.105265E-11	0.921010E-12	-0.299817E-10	-0.218344E-09

Table eight

Surface	S7	S8	S16	S17
					K	-0.287487	-29.078113	0.370957	8.149836
A	-0.444445E-03	-0.366634E-03	0.419421E-02	0.812727E-04
					B	0.325135E-03	0.207478E-03	-0.421990E-02	-0.118150E-02
C	-0.942099E-04	-0.651024E-04	0.149502E-02	0.569220E-03
					D	0.142162E-04	0.105461E-04	-0.278494E-03	-0.105259E-03
E	-0.123793E-05	-0.981564E-06	0.302812E-04	0.821031E-05
					F	0.646011E-07	0.545468E-07	-0.199242E-05	-0.106687E-06
G	-0.199454E-08	-0.178842E-08	0.781556E-07	-0.223650E-07
					H	0.335937E-10	0.319210E-10	-0.168246E-08	0.128488E-08
J	-0.237899E-12	-0.239172E-12	0.152978E-10	-0.214082E-10

Table nine

Table ten

Surface	S7	S8	S16	S17
					K	-0.057802	-38.237948	0.381400	7.510150
A	-0.108825E-02	-0.925117E-03	0.504424E-02	-0.255612E-01
					B	0.773173E-03	0.687816E-03	-0.778654E-02	0.245535E-01
C	-0.206412E-03	-0.195254E-03	0.374219E-02	-0.967539E-02
					D	0.289242E-04	0.292236E-04	-0.886427E-03	0.206324E-02
E	-0.236020E-05	-0.255010E-05	0.117839E-03	-0.263113E-03
					F	0.116248E-06	0.134432E-06	-0.923403E-05	0.206674E-04
G	-0.340625E-08	-0.421889E-08	0.423522E-06	-0.980342E-06
					H	0.546793E-10	0.725740E-10	-0.105177E-07	0.257489E-07
J	-0.370254E-12	-0.526846E-12	0.109217E-09	-0.287411E-09

In addition, in addition to above-mentioned optical specification, the zoom lens 1~5 cooperates the design of following condition formulae, can also allow image Reach preferable image quality, and then can effectively achieve and reduce camera lens volume, wide-angle and the effect for reducing optical distortion:

(1) -1.2 < F/f1 < -0.4；

(2) Vd6 > 63；

(3) Vd6-Vd5 > 40；

(4) Vd9 > 63；

Wherein, F is the focal length of the zoom lens 1~5；F1 is the focal length of first lens group G1；Vd5 is the 5th eyeglass L5 Abbe number；Vd6 is the Abbe number of the 6th eyeglass L6；Vd9 is the Abbe number of the 9th eyeglass L9.

And the purpose of design of the above conditions can effectively contract if be that the zoom lens 1~5 meets (1) formula The volume of mini system, and aberration can be effectively inhibited.In more detail, if the zoom lens 1~5 exceeds the upper limit of (1) formula, The refractive power of first lens group G1 will become excessively weak, so that the stroke moved needed for zooming procedure is elongated, and be unfavorable for reducing system System volume.Conversely, the refractive power of first lens group G1 can not effectively inhibit the too strong of change if being lower than the lower limit of (1) formula Aberration.

In addition, it will cause the inhibitory effects of color difference on axis not if the zoom lens 1~5 is unable to satisfy (2), (3) formula It is evident, and the aberration of visible light to infrared band can also amplify, and it is bad in turn result in lens imaging quality.

In addition, color difference can show poor if the Abbe number of the 9th eyeglass L9 is lower than the range of (4) formula.Therefore, Design through (4) formula and the structure for cooperating the 9th eyeglass L9 can will effectively eliminate optical system when close to imaging surface Various aberrations, and can make the optical property of the zoom lens 1~5 can satisfy million picture elements optics photosensitive element optics Demand.

And the zoom lens 1~5 of the first to the 5th embodiment of the invention is in detailed data such as 11 institute of table of above-mentioned condition Show:

Table 11

In this way, please refer to Fig. 2A to Fig. 2 C, it is known that know the zoom lens 1 of first embodiment by above-mentioned design, Also it can reach requirement in image quality when wide-angle side, wherein can be seen that by Fig. 2A, the maximum distortion amount of the zoom lens 1 No more than -100% and 0%.It can be seen that by Fig. 2 B, the maximum curvature of field of the zoom lens 1 is no more than -0.10mm and 0.10mm. It can be seen that by Fig. 2 C, the maximum longitudinal spherical aberration of the zoom lens 1 is no more than -0.20mm and 0.10mm.

In addition, refering to Fig. 2 D to Fig. 2 F, it is known that know the zoom lens 1 of first embodiment by above-mentioned design, it is remote in taking the photograph Also it can reach requirement in image quality when journey, wherein it can be seen that by Fig. 2 D, the maximum distortion amount of the zoom lens 1 is no more than- 50% and 0%.It can be seen that by Fig. 2 E, the maximum curvature of field of the zoom lens 1 is no more than -0.10mm and 0.10mm.It can by Fig. 2 F Find out, the longitudinal spherical aberration of the zoom lens 1 is no more than -0.10mm and 0.10mm.

It is continuous refering to Fig. 4 A to Fig. 4 C, it is known that the zoom lens 2 of second embodiment is known by above-mentioned design, when wide-angle side Image quality on also can reach requirement, wherein can be seen that by Fig. 4 A, the maximum distortion amount of the zoom lens 2 is no more than- 100% and 0%.It can be seen that by Fig. 4 B, the maximum curvature of field of the zoom lens 2 is no more than -0.10mm and 0.10mm；It can by Fig. 4 C Find out, the maximum longitudinal spherical aberration of the zoom lens 2 is no more than -0.10mm and 0.10mm.

In addition, refering to Fig. 4 D to Fig. 4 F, it is known that know the zoom lens 2 of second embodiment by above-mentioned design, it is remote in taking the photograph Also it can reach requirement in image quality when journey, wherein it can be seen that by Fig. 4 D, the maximum distortion amount of the zoom lens 2 is no more than- 50% and 0%.It can be seen that by Fig. 4 E, the maximum curvature of field of the zoom lens 2 is no more than -0.20mm and 0.10mm.It can by Fig. 4 F Find out, the longitudinal spherical aberration of the zoom lens 2 is no more than 0mm and 0.10mm.

It is continuous refering to Fig. 6 A to Fig. 6 C, it is known that the zoom lens 3 of 3rd embodiment is known by above-mentioned design, when wide-angle side Image quality on also can reach requirement, wherein can be seen that by Fig. 6 A, the maximum distortion amount of the zoom lens 3 is no more than- 100% and 0%.It can be seen that by Fig. 6 B, the maximum curvature of field of the zoom lens 3 is no more than -0.10mm and 0.10mm.It can by Fig. 6 C Find out, the maximum longitudinal spherical aberration of the zoom lens 3 is no more than -0.10mm and 0.10mm.

In addition, refering to Fig. 6 D to Fig. 6 F, it is known that know the zoom lens 3 of 3rd embodiment by above-mentioned design, it is remote in taking the photograph Also it can reach requirement in image quality when journey, wherein it can be seen that by Fig. 6 D, the maximum distortion amount of the zoom lens 3 is no more than- 50% and 0%.It can be seen that by Fig. 6 E, the maximum curvature of field of the zoom lens 3 is no more than -0.10mm and 0.10mm.It can by Fig. 6 F Find out, the longitudinal spherical aberration of the zoom lens 3 is no more than 0mm and 0.10mm.

It is continuous refering to Fig. 8 A to Fig. 8 C, it is known that the zoom lens 4 of fourth embodiment is known by above-mentioned design, when wide-angle side Image quality on also can reach requirement, wherein can be seen that by Fig. 8 A, the maximum distortion amount of the zoom lens 4 is no more than- 100% and 0%.It can be seen that by Fig. 8 B, the maximum curvature of field of the zoom lens 4 is no more than -0.20mm and 0.20mm.It can by Fig. 8 C Find out, the maximum longitudinal spherical aberration of the zoom lens 4 is no more than 0mm and 0.10mm.

In addition, refering to Fig. 8 D to Fig. 8 F, it is known that know the zoom lens 4 of fourth embodiment by above-mentioned design, it is remote in taking the photograph Also it can reach requirement in image quality when journey, wherein it can be seen that by Fig. 8 D, the maximum distortion amount of the zoom lens 4 is no more than- 50% and 0%.It can be seen that by Fig. 8 E, the maximum curvature of field of the zoom lens 4 is no more than -0.20mm and 0.10mm.It can by Fig. 8 F Find out, the longitudinal spherical aberration of the zoom lens 4 is no more than 0mm and 0.10mm.

Continuous 0A to Figure 10 C refering to fig. 1, it is known that the zoom lens 5 of the 5th embodiment is known by above-mentioned design, in wide-angle side When image quality on also can reach requirement, wherein can be seen that by Figure 10 A, the maximum distortion amount of the zoom lens 5 is no more than- 100% and 0%.It can be seen that by Figure 10 B, the maximum curvature of field of the zoom lens 5 is no more than -0.10mm and 0.20mm.By Figure 10 C It can be seen that, the maximum longitudinal spherical aberration of the zoom lens 5 is no more than -0.10mm and 0.10mm.

In addition, 0D to Figure 10 F refering to fig. 1, it is known that the zoom lens 5 of the 5th embodiment is known by above-mentioned design, in taking the photograph It also can reach requirement in image quality when long-range, wherein can be seen that by Figure 10 D, the maximum distortion amount of the zoom lens 5 does not surpass Cross -50% and 0%.It can be seen that by Figure 10 E, the maximum curvature of field of the zoom lens 5 is no more than -0.10mm and 0.10mm.By scheming 10F can be seen that the longitudinal spherical aberration of the zoom lens 5 is no more than 0mm and 0.10mm.

In conclusion the zoom lens 1~5 of the invention, through above-mentioned lens structure and eyeglass material and optical strip The design of part formula remotely can all have the effect of large aperture from wide-angle side to taking the photograph, and be applicable to the large scale light such as 1/2 inch Photosensory assembly is learned, and its camera lens volume remains to keep light and short, and the aberration of correction visible light to infrared light can be reached simultaneously, It is also able to maintain Gao Xiedu and large aperture, and has the advantages that easy to manufacture, assembling simultaneously.

And should be noted that, the foregoing is merely preferably possible embodiments of the invention, not with above-described embodiment Content be limited, and this hair ought to be included in using description of the invention and the equivalence changes carried out by claim such as In bright the scope of the patents.

Claims (10)

1. a kind of zoom lens includes by an object side a to image side and along one first lens group of an optical axis sequential, a light Circle and a second lens group, wherein first lens group has negative refractive power, and by the one the of the object side to the image side sequential One eyeglass, one second eyeglass and a third eyeglass are formed；Second eyeglass has negative refractive power；First eyeglass, this Two eyeglasses and the third eyeglass can be between the object side and the apertures along the optical axis synchronizing moving；The second lens group has positive dioptric Power, and by one the 4th eyeglass, one the 5th eyeglass, one the 6th eyeglass, one the 7th eyeglass, one of the object side to the image side sequential 8th eyeglass and one the 9th eyeglass are formed；6th eyeglass has positive refractive power；9th eyeglass has positive refractive power；It should 4th eyeglass, the 5th eyeglass, the 6th eyeglass, the 7th eyeglass, the 8th eyeglass and the 9th eyeglass can be in the apertures And along the optical axis synchronizing moving between the image side；It is characterized by:

First eyeglass has negative refractive power；The third eyeglass has positive refractive power, and forms a tool with the second eyeglass gluing There is the balsaming lens of negative refractive power；

4th eyeglass has positive refractive power；5th eyeglass has negative refractive power, and the 6th eyeglass and the 5th eyeglass glue It is glutinous to form a balsaming lens with negative refractive power；7th eyeglass has positive refractive power；8th eyeglass has negative refractive power.

2. zoom lens as described in claim 1, which is characterized in that first eyeglass is a meniscus, and its convex surface court To the object side；Second eyeglass is a biconcave lens；The third eyeglass be a meniscus, and its convex surface towards the object side and with It binds the concave surface of second eyeglass towards the image side.

3. zoom lens as described in claim 1, which is characterized in that the 4th eyeglass is a biconvex lens；5th eyeglass For a meniscus, and its convex surface is towards the object side；6th eyeglass is a biconvex lens, and towards the convex surface of the object side and is somebody's turn to do It binds the concave surface of 5th eyeglass towards the image side；7th eyeglass is a meniscus, and its convex surface is towards the image side；8th Eyeglass is a meniscus, and its convex surface is towards the object side；9th eyeglass is a meniscus, and its convex surface is towards the object Side.

4. zoom lens as claimed in claim 3, which is characterized in that a 4th eyeglass at least mirror surface is non-spherical surface.

5. zoom lens as claimed in claim 4, which is characterized in that two mirror surfaces of the 4th eyeglass are all non-spherical surface.

6. zoom lens as claimed in claim 3, which is characterized in that a 9th eyeglass at least mirror surface is non-spherical surface.

7. zoom lens as claimed in claim 6, which is characterized in that two mirror surfaces of the 9th eyeglass are all non-spherical surface.

8. zoom lens as described in claim 1, which is characterized in that the 5th eyeglass and the 6th eyeglass also meet following article Part: Vd6 > 63；And Vd6-Vd5 > 40；Wherein, Vd5 is the Abbe number of the 5th eyeglass；Vd6 is the Ah of the 6th eyeglass Shellfish coefficient.

9. zoom lens as described in claim 1, which is characterized in that the 9th eyeglass also meets following condition: Vd9 > 63； Wherein, Vd9 is the Abbe number of the 9th eyeglass.

10. zoom lens as described in claim 1, which is characterized in that also meet following condition: -1.2 < F/f1 < -0.4； Wherein, F is the focal length of the zoom lens；F1 is the focal length of first lens group.