CN105842829A

CN105842829A - Zoom lens

Info

Publication number: CN105842829A
Application number: CN201610145199.6A
Authority: CN
Inventors: 王国权; 曾建雄; 陈凯筠
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2013-03-08
Filing date: 2013-12-26
Publication date: 2016-08-10
Anticipated expiration: 2033-12-26
Also published as: TWI460467B; TW201435385A; CN104035189A; CN105842829B; CN104035189B

Abstract

A zoom lens includes a first lens group and a second lens group arranged in order from an enlargement side to a reduction side. The first lens group has negative bending brightness and comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from the magnifying side to the reducing side, and the bending brightness of the first lens, the second lens, the third lens and the fourth lens is negative, negative and positive in sequence. The second lens group has positive bending brightness, and comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from the magnifying side to the reducing side, and the bending brightness of the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens is sequentially positive, negative, positive, negative and positive.

Description

Zoom lens

The application is the divisional application of the application for a patent for invention case of Application No. 201310728265.9, the application of original application Day being December in 2013 26, invention and created name is " zoom lens ".

Technical field

The invention relates to a kind of optical lens, and in particular to a kind of zoom lens.

Background technology

Along with the progress of photoelectric technology, Image sensor apparatus (such as camera, camera etc.) has been generally applicable to daily In each field of life, or in the product line of factory, to replace human eye or the artificial thing that can make originally.Consequently, it is possible to the mankind Just can have more plenty of time and manpower, go to be engaged in even more important thing.On the other hand, the use of Image sensor apparatus is also People can be allowed to go to notice, and human eye is not easy the place noticed at ordinary times, or still reaches effective prison under unmanned situation Control effect.

In Image sensor apparatus, except CIS (as Charged Coupled Device (charge coupled device, Or CMOS sensing component (complementary metal oxide semiconductor CCD) Sensor, CMOS sensor) etc.) quality detected image quality can be produced conclusive impact outside, optical frames The quality of head is also key point.Therefore, how to be suitably designed camera lens to reach good image quality, always camera lens sets Meter person paid close attention to.

U.S. Patent No. 5155629, No. 5329402, No. 7933075, No. 7557839, No. 6839183, No. 7944620, No. 7184220, No. 6917477 and No. 6809882 propose zoom lens.Additionally, United States Patent (USP) No. 7075719 proposes a kind of projection lens.

Summary of the invention

The present invention provides a kind of zoom lens, has that volume is little, wide viewing angle, High Resolution, a large aperture and good infrared The advantages such as rectification.

Other objects of the present invention and advantage can be further understood from the technical characteristic that disclosed herein.

For reaching one of above-mentioned or partly or entirely purpose or other purposes, one embodiment of the invention proposes a kind of zoom Camera lens, in order to be configured between Zoom Side and reduced side.This zoom lens includes the first lens group and the second lens group.First is saturating Lens group is configured between Zoom Side and reduced side, and has negative brightness (refractive power) in the wrong.First lens group includes The first lens, the second lens, the 3rd lens and the 4th lens being arranged in order toward reduced side from Zoom Side, and the first lens, The brightness in the wrong of two lens, the 3rd lens and the 4th lens is followed successively by negative, negative, negative and just.Second lens group is configured at the first lens Between group and reduced side, and have and just bend brightness.Second lens group include from Zoom Side toward reduced side be arranged in order the 5th saturating Mirror, the 6th lens, the 7th lens, the 8th lens and the 9th lens, and the 5th lens, the 6th lens, the 7th lens, the 8th lens And the 9th the brightness in the wrong of lens be followed successively by positive and negative, positive and negative and just.Zoom lens meets-2.8 < f1/fw <-2.3 and 0.6 < f1/ F2 < 0.9, wherein f1 is the effective focal length (effective focal length, EFL) of the first lens group, and f2 is the second lens The effective focal length of group, and fw is zoom lens effective focal length when wide-angle side.

Based on above-mentioned, it is followed successively by toward reduced side from Zoom Side owing to the zoom lens of embodiments of the invention has brightness in the wrong Negative, negative, negative, positive, positive and negative, positive and negative and positive lens combination, and meet-2.8 < f1/fw <-2.3 and 0.6 < f1/f2 < 0.9, Therefore becoming of embodiments of the invention has wide viewing angle and good image quality concurrently without camera lens.

Accompanying drawing explanation

For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing to make in detail Carefully it is described as follows.

Figure 1A to Fig. 1 C is that the zoom lens of one embodiment of the invention is respectively at wide-angle side, centre position and telescope end Structural representation.

Fig. 2 A to Fig. 2 C is the zoom lens of Figure 1A optical analog datagram when wide-angle side.

Fig. 3 A to Fig. 3 C is the zoom lens of Figure 1B optical analog datagram when centre position.

Fig. 4 A to Fig. 4 C is the zoom lens of Fig. 1 C optical analog datagram when telescope end.

Fig. 5 A to Fig. 5 C is that the zoom lens of another embodiment of the present invention is respectively at wide-angle side, centre position and telescope end Structural representation.

Fig. 6 A to Fig. 6 C is the zoom lens of Fig. 5 A optical analog datagram when wide-angle side.

Fig. 7 A to Fig. 7 C is the zoom lens of Fig. 5 B optical analog datagram when centre position.

Fig. 8 A to Fig. 8 C is the zoom lens of Fig. 5 C optical analog datagram when telescope end.

Detailed description of the invention

For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to graphic one preferable In the detailed description of embodiment, can clearly present.The direction term being previously mentioned in following example, such as: upper and lower, left, Right, front or rear etc., it is only the direction with reference to accompanying drawing.Therefore, the direction term of use is used to illustrate not for limiting this Bright.

Figure 1A to Fig. 1 C is that the zoom lens of one embodiment of the invention is respectively at wide-angle side, centre position and telescope end Structural representation.Refer to Figure 1A to Fig. 1 C, the zoom lens 100 of the present embodiment in order to be configured at Zoom Side and reduced side it Between.Zoom lens 100 includes the first lens group 110 and the second lens group 120.First lens group 110 is configured at Zoom Side and contracting Between little side, and there is negative brightness in the wrong.First lens group 110 includes the first lens being arranged in order from Zoom Side toward reduced side 111, the second lens the 112, the 3rd lens 113 and the 4th lens 114, and first lens the 111, second lens the 112, the 3rd lens 113 and the 4th the brightness in the wrong of lens 114 be followed successively by negative, negative, negative and just.Second lens group 120 be configured at the first lens group 110 with Between reduced side, and have and just bend brightness.Second lens group 120 includes the 5th lens being arranged in order from Zoom Side toward reduced side 121, the 6th lens the 122, the 7th lens the 123, the 8th lens 124 and the 9th lens 125, and the 5th lens the 121, the 6th lens 122, the brightness in the wrong of the 7th lens the 123, the 8th lens 124 and the 9th lens 125 is followed successively by positive and negative, positive and negative and just.

In the present embodiment, zoom lens 100 meets-2.8 < f1/fw <-2.3 and 0.6 < f1/f2 < 0.9, and wherein f1 is The effective focal length of the first lens group 110, f2 is the effective focal length of the second lens group 120, and fw is that zoom lens 100 is in wide-angle side Time effective focal length.

In the present embodiment, first lens the 111, second lens the 112, the 3rd lens 113 and the 4th lens 114 are sphere Lens (spherical lens), and the 5th lens the 121, the 6th lens the 122, the 7th lens the 123, the 8th lens 124 and the 9th In lens 125, at least the two is non-spherical lens (aspheric lens).Specifically, in the present embodiment, the 5th lens 121 for example, non-spherical lenses, and the 9th lens 125 for example, non-spherical lens, and the 6th lens the 122, the 7th lens 123 and 8th lens 124 for example, spherical lens.

In the present embodiment, zoom lens 100 also includes aperture diaphragm (aperture stop) 130, and it is configured at first Between lens group 110 and the second lens group 120.In the present embodiment, the second lens group 120 is zoom group, and the first lens group 110 is focusing group.Additionally, in the present embodiment, when zoom lens 100 is changed from wide-angle side toward telescope end, aperture diaphragm 130 Position remain unchanged relative to reduced side, and the first lens group 110 is close toward aperture diaphragm 130 with the second lens group 120, example As changed to the state of Figure 1B by the state of Figure 1A, change to the state of Fig. 1 C the most again.

In the present embodiment, the 3rd lens 113 and the 4th lens 114 form cemented doublet (double cemented Lens) 115, and the 6th lens 122 and the 7th lens 123 form cemented doublet 126.Additionally, in the present embodiment, first is saturating Mirror 111 is for example, convex surface facing the convexoconcave lens (convex-concave lens) of Zoom Side, and the second lens 112 are the most double Concavees lens (biconcave lens), the 3rd lens 113 for example, convex surface facing the convexoconcave lens of Zoom Side, the 4th lens 114 For example, convex surface facing the meniscus (concave-convex lens) of Zoom Side, the 5th lens 121 for example, biconvex lens (biconvex lens), the 6th lens 122 are for example, convex surface facing the convexoconcave lens of Zoom Side, and the 7th lens 123 are the most double Convex lens, the 8th lens 124 are for example, convex surface facing the convexoconcave lens of Zoom Side, and the 9th lens 125 for example, biconvex lens. Additionally, in the present embodiment, reduced side may be configured with CIS 60, and the scenery being positioned at Zoom Side can be by zoom lens 100 image on CIS 60.CIS 60 for example, numerical digit micromirror assemblies or CMOS sensing Assembly.When zoom lens 100 zoom, the position of aperture diaphragm 130 remains unchanged relative to the position of CIS 60.

The zoom lens 100 of the present embodiment use bend brightness from Zoom Side toward reduced side be followed successively by negative, negative, negative, positive, just, Negative, positive, negative and positive lens combination, the brightness in the wrong of the first lens group 110 and the second lens group 120 be respectively negative with just, and change Time burnt, the first lens group 110 and the second lens group 120 all move (moving relative to aperture diaphragm 130) relative to reduced side, Therefore the zoom lens 100 of the present embodiment can reach miniaturization, picture without dark angle and the effect of wide viewing angle.For example, this reality Execute the zoom lens 100 of example can make diagonal at CIS 60 the angle of visual field (2 ω) (field of view, FOV) up to 143.2 degree.Additionally, the zoom lens 100 of the present embodiment can reach the resolution of three mega pixel levels.It addition, this The part lens (the such as the 7th lens 123) of the zoom lens 100 of embodiment can use the glass material of low dispersion, can with raising See the confocal effect of light and infrared light.In other words, the Image sensor apparatus of zoom lens 100 is used to detect visible shadow by day As with when detecting infrared light image night, being all able to detect that the sharp image that focusing is good.Furthermore, the varifocal mirror of the present embodiment 100 can have large aperture, and in one embodiment, the f-number (f-number) of zoom lens can be as small as 1.4.The present embodiment The CIS 60 that zoom lens 100 is suitable to large-size is arranged in pairs or groups.But, when the present embodiment zoom lens 100 with When the CIS 60 of reduced size is arranged in pairs or groups, still can provide good visual range.

Herein below will enumerate an embodiment of zoom lens 100.It is noted that following table one, table two and table three Data information listed by is not limited to the present invention, has usually intellectual with reference to this in any art After bright, when its parameter or setting can be made suitable change, but it must belong in the practical range of the present invention.

(table one)

(table two)

In Table 1, spacing refers to the air line distance between two adjacently situated surfaces on optical axis A, for example, between the S1 of surface Away from, i.e. air line distance on optical axis A between surface S1 to surface S2.Thickness corresponding to each lens in remarks column, refractive index with Abbe number refer to the numerical value that each spacing in same column, refractive index are corresponding with Abbe number.Additionally, in Table 1, surface S1, S2 are Two surfaces of one lens 111, surface S3, S4 are two surfaces of the second lens 112, and surface S5 is that the 3rd lens 113 are towards amplification The surface of side, surface S6 is the surface that the 3rd lens 113 are connected with the 4th lens 114, and surface S7 be the 4th lens 114 towards The surface of reduced side.Surface S8 is infrared cut of light light filter (infrared cut filter) 70 (e.g. infrared cut of light Film) position, surface S9 is the position of aperture diaphragm 130, and wherein transparent substrates 80 is in order to carry infrared cut of light Light filter 70, surface S8 is the transparent substrates 80 surface towards Zoom Side, and surface S9 is that transparent substrates 80 is towards reduced side Surface.Surface S10, S11 are two surfaces of the 5th lens 121, and surface S12 is the 6th lens 122 surfaces towards Zoom Side, table Face S13 is the surface that the 6th lens 122 are connected with the 7th lens 123, and surface S14 is that the 7th lens 123 are towards reduced side Surface.Surface S15, S16 are two surfaces of the 8th lens 124, and two surfaces that surface S17, S18 are the 9th lens 125.Surface Glass cover (cover glass) 50 can be provided with, to protect CIS 60 between S18 and CIS 60.Surface S18 that The spacing filled out in row (row) is the surface S18 spacing to CIS 60.

Additionally, table two lists the zoom lens 100 effective focal length when wide-angle side, centre position and telescope end, aperture The numerical value such as value (F/#), the angle of visual field and variable spacing d1, d2 and d3.

Above-mentioned surface S10, S11, S17 and S18 are even order terms aspheric surface, and its available following equation represents:

Z = \frac{{cr}^{2}}{1 + \sqrt{1 - (1 + k) c^{2} r^{2}}} + A_{2} r^{2} + A_{4} r^{4} + A_{6} r^{6} + A_{8} r^{8} + A_{10} r^{10}

In formula, Z is the side-play amount (sag) in optical axis A direction, and c is the radius of osculating sphere (osculating sphere) Inverse, namely close to the inverse of the radius of curvature (such as the radius of curvature of S10, S11, S17 and S18 in table one) at optical axis A.k Be quadratic surface coefficient (conic), r be aspheric surface height, be the height toward rims of the lens from lens centre, and A2, A4, A6, A8 and A10 are asphericity coefficient (aspheric coefficient), and coefficient A2 is 0 in the present embodiment.Lower list three institute List is the aspheric surface parameter value of surface S10, S11, S17 and S18.

(table three)

Fig. 2 A to Fig. 2 C is the zoom lens of Figure 1A optical analog datagram when wide-angle side, and Fig. 3 A to Fig. 3 C is Figure 1B Zoom lens optical analog datagram when centre position, and the zoom lens that Fig. 4 A to Fig. 4 C is Fig. 1 C is when telescope end Optical analog datagram.Refer to Fig. 2 A to Fig. 4 C, wherein Fig. 2 A, Fig. 3 A and Fig. 4 A are to make to simulate with wavelength 588 nm The analog data figure of longitudinal aberration (longitudinal aberration), the wherein pupil radius (pupil of Fig. 2 A Radius) being 1.0135 millimeters, the pupil radius of Fig. 3 A is 1.4449 millimeters, and the pupil radius of Fig. 4 A is 1.5338 millimeters (i.e. in Fig. 2 A, Fig. 3 A and Fig. 4 A, the maximum scale (that scale of top) of the longitudinal axis respectively 1.0135 millimeters, 1.4449 millimeters and 1.5338 millimeters).Fig. 2 B, Fig. 3 B and Fig. 4 B are the curvature of field (field making mould evidence with wavelength 588 nm Curvature) with distortion (distortion) optical analog datagram, wherein the maximum field of view angle (half-angle) of Fig. 2 B is 71.588 degree, the maximum field of view angle (half-angle) of Fig. 3 B is 37.952 degree, and the maximum field of view angle (half-angle) of Fig. 4 B is 25.835 degree. Additionally, in the figure of the curvature of field, S represents the data in the sagitta of arc (sagittal) direction, and T represents meridian (tangential) direction Data.Fig. 2 C, Fig. 3 C and Fig. 4 C are the optical analog data making the lateral chromatic aberration simulated with wavelength 486,588 and 656 nm Figure, wherein the maximum image height (being i.e. positioned at the maximum image height of reduced side) of Fig. 2 C, Fig. 3 C and Fig. 4 C is 3.41 millimeters.Fig. 2 A is to figure The figure gone out shown by 4C, all in the range of standard, thus can verify that the zoom lens 100 of the present embodiment can actually have Good optical imagery quality.

Fig. 5 A to Fig. 5 C is that the zoom lens of another embodiment of the present invention is respectively at wide-angle side, centre position and telescope end Structural representation.Refer to Fig. 5 A to Fig. 5 C, the zoom lens 100a of the present embodiment is similar to the varifocal mirror of Figure 1A to Fig. 1 C 100, and both Main Differences are as described below.Refer to Fig. 5 A to Fig. 5 C, at the of the zoom lens 100a of the present embodiment In two lens group 120a, the 8th lens 124a is biconcave lens, and the 9th lens 125a is concavo-convex convex surface facing Zoom Side Mirror.The zoom lens 100a of the present embodiment also can reach advantage and effect of above-mentioned zoom lens 100, no longer repeats at this.

Herein below will enumerate an embodiment of zoom lens 100a.It is noted that following table four, table five and table six Data information listed by is not limited to the present invention, has usually intellectual with reference to this in any art After bright, when its parameter or setting can be made suitable change, but it must be within the scope of the present invention.

(table four)

(table five)

The physical significance of each parameter in table four can refer to the explanation to table one, no longer repeats at this.Additionally, table five arranges Zoom lens 100a effective focal length when wide-angle side, centre position and telescope end, f-number (F/#), the angle of visual field and can are gone out Become the numerical value such as spacing d1, d2 and d3.

Above-mentioned surface S10, S11, S17 and S18 is even order terms aspheric surface, and its formula is same as what above-mentioned table three was suitable for Formula.Coefficient A2 is 0 in the present embodiment.Listed by lower list six be zoom lens 100a surface S10, S11, S17 and The aspheric surface parameter value of S18.

(table six)

Fig. 6 A to Fig. 6 C is the zoom lens of Fig. 5 A optical analog datagram when wide-angle side, and Fig. 7 A to Fig. 7 C is Fig. 5 B Zoom lens optical analog datagram when centre position, and Fig. 8 A to Fig. 8 C is that the zoom lens of Fig. 5 C is in telescope end Time optical analog datagram.Refer to Fig. 6 A to Fig. 8 C, wherein Fig. 6 A, Fig. 7 A and Fig. 8 A are for simulate with wavelength 588 nm The analog data figure of longitudinal aberration, wherein the pupil radius of Fig. 6 A is 1.0033 millimeters, and the pupil radius of Fig. 7 A is 1.4024 Millimeter, and the pupil radius of Fig. 8 A be 1.4714 millimeters (i.e. in Fig. 6 A, Fig. 7 A and Fig. 8 A, the maximum scale (top of the longitudinal axis That scale) be respectively 1.0033 millimeters, 1.4024 millimeters and 1.4714 millimeters).Fig. 6 B, Fig. 7 B and Fig. 8 B are with wavelength 588 nm make the curvature of field of mould evidence and the optical analog datagram of distortion, and wherein the maximum field of view angle (half-angle) of Fig. 6 B is 71.761 Degree, the maximum field of view angle (half-angle) of Fig. 7 B is 38.324 degree, and the maximum field of view angle (half-angle) of Fig. 8 B is 25.908 degree.Additionally, In the figure of the curvature of field, S represents the data in sagitta of arc direction, and T represents the data of meridian direction.Fig. 6 C, Fig. 7 C and Fig. 8 C be with Wavelength 486,588 and 656 nm makees the optical analog datagram of lateral chromatic aberration simulated, and wherein Fig. 6 C, Fig. 7 C and Fig. 8 C are Big image height (being i.e. positioned at the maximum image height of reduced side) is 3.41 millimeters.The figure gone out shown by Fig. 6 A to Fig. 8 C is all in standard In the range of, thus can verify that the zoom lens 100a of the present embodiment can actually have good optical imagery quality.

In sum, it is followed successively by toward reduced side from Zoom Side owing to the zoom lens of embodiments of the invention has brightness in the wrong Negative, negative, negative, positive, positive and negative, positive and negative and positive lens combination, and meet-2.8 < f1/fw <-2.3 and 0.6 < f1/f2 < 0.9, Therefore the zoom lens of embodiments of the invention has wide viewing angle and good image quality concurrently.

The foregoing is only presently preferred embodiments of the present invention, it is impossible to limit, with this, the scope that the present invention implements, all depend on The simple equivalence that the claims in the present invention and invention description content are made changes and modifies, and the most still belongs to what patent of the present invention contained In the range of.Additionally any embodiment of the present invention or claim be not necessary to reach the whole purposes that disclosed herein or advantage or Feature.Additionally, summary part and title are intended merely to assist patent document search to be used, not it is used for limiting the right of the present invention Scope.

Symbol description

50: glass cover

60: CIS

70: infrared cut of light light filter

80: transparent substrates

100,100a: zoom lens

110: the first lens groups

111: the first lens

112: the second lens

113: the three lens

114: the four lens

115,126: cemented doublet

120, the 120a: the second lens group

121: the five lens

122: the six lens

123: the seven lens

124, the 124a: the eight lens

125, the 125a: the nine lens

130: aperture diaphragm

A: optical axis

S1～S18: surface.

Claims

1. a zoom lens, in order to be configured between a Zoom Side and a reduced side, this zoom lens includes one first lens Group and one second lens group,

This first lens group, is configured between this Zoom Side and this reduced side, and has negative brightness in the wrong, and this first lens group includes Four lens；

This second lens group, is configured between this first lens group and this reduced side, and has and just bend brightness, this second lens group Including five lens；

Wherein, this zoom lens meets-2.8 < f1/fw <-2.3 and 0.6 < f1/f2 < 0.9, and wherein f1 is this first lens group Effective focal length, f2 is the effective focal length of this second lens group, and fw is this zoom lens effective focal length when wide-angle side.

2. zoom lens as claimed in claim 1, it is characterised in that this first lens group comprises and reduced toward this from this Zoom Side One first lens, one second lens, one the 3rd lens and one the 4th lens that side is arranged in order, these first lens, this is second saturating Mirror, the 3rd lens and the 4th lens are spherical lens.

3. zoom lens as claimed in claim 2, it is characterised in that the 3rd lens are double with the 4th lens forming glued saturating Mirror.

4. zoom lens as claimed in claim 1, it is characterised in that this second lens group includes being reduced from this Zoom Side toward this One the 5th lens, one the 6th lens, one the 7th lens, one the 8th lens and one the 9th lens that side is arranged in order, this is second saturating In lens group, at least the two is non-spherical lens.

5. zoom lens as claimed in claim 4, it is characterised in that the 6th lens are double with the 7th lens forming glued saturating Mirror.

6. zoom lens as claimed in claim 4, it is characterised in that the 5th lens or the 9th lens are that aspheric surface is saturating Mirror.

7. zoom lens as claimed in claim 1, also includes an aperture diaphragm, and this aperture diaphragm is configured at this first lens group And between this second lens group.

8. zoom lens as claimed in claim 7, it is characterised in that when this zoom lens is changed from wide-angle side toward telescope end Time, the position of this aperture diaphragm remains unchanged relative to this reduced side, and this first lens group and this second lens group are toward this hole Footpath diaphragm is close.

9. zoom lens as claimed in claim 1, it is characterised in that this second lens group is zoom group, and these first lens Group is focusing group.

10. zoom lens as claimed in claim 1, it is characterised in that this first lens group comprises from this Zoom Side toward this contracting One first lens, one second lens, one the 3rd lens and one the 4th lens that little side is arranged in order, this second lens group include by One the 5th lens, one the 6th lens, one the 7th lens, one the 8th lens and 1 that this Zoom Side is arranged in order toward this reduced side Nine lens, these first lens are the convexoconcave lens convex surface facing this Zoom Side, and these second lens are biconcave lens, the 3rd lens For the convexoconcave lens convex surface facing this Zoom Side, the 4th lens are the meniscus convex surface facing this Zoom Side, and the 5th is saturating Mirror is biconvex lens, and the 6th lens are the convexoconcave lens convex surface facing this Zoom Side, and the 7th lens are biconvex lens, and this is years old Eight lens are the convexoconcave lens convex surface facing this Zoom Side, or the 9th lens are biconvex lens.

11. zoom lens as claimed in claim 1, it is characterised in that this first lens group comprises from this Zoom Side toward this contracting One first lens, one second lens, one the 3rd lens and one the 4th lens that little side is arranged in order, this second lens group include by One the 5th lens, one the 6th lens, one the 7th lens, one the 8th lens and 1 that this Zoom Side is arranged in order toward this reduced side Nine lens, these first lens are the convexoconcave lens convex surface facing this Zoom Side, and these second lens are biconcave lens, the 3rd lens For the convexoconcave lens convex surface facing this Zoom Side, the 4th lens are the meniscus convex surface facing this Zoom Side, and the 5th is saturating Mirror is biconvex lens, and the 6th lens are the convexoconcave lens convex surface facing this Zoom Side, and the 7th lens are biconvex lens, and this is years old Eight lens are biconcave lens, or the 9th lens are the meniscus convex surface facing this Zoom Side.

12. zoom lens as claimed in claim 1, it is characterised in that this first lens group includes from this Zoom Side toward this contracting Little side is arranged in order and bends brightness and is followed successively by negative, negative, negative, positive one first lens, one second lens, one the 3rd lens and 1 Four lens, this second lens group includes that being arranged in order and bend brightness from this Zoom Side toward this reduced side is followed successively by positive and negative, positive and negative And positive one the 5th lens, one the 6th lens, one the 7th lens, one the 8th lens and one the 9th lens.