CN109932800A - Zoom lens - Google Patents

Abstract

A kind of zoom lens, comprising: one first lens group is focused, and including single a lens and is negative lens, and the Abbe number of single a lens is set as Vd, refractive index is set as Nd, wherein 23≤Vd≤50,1.5≤Nd≤1.9；And at least one second lens group, zoom, and the combination including a positive lens and a negative lens are carried out, and the combination of positive lens and negative lens is located at the rear of single a lens of the first lens group.The present invention is by the Abbe number of single a lens and the optical match of refractive index, preferableization of material property and focus effects can be taken into account, and first lens group only single a lens and be easy to make, it can effectively reduce production cost, and cooperate the matching of the effective radius and maximum image height of the glass aspheric lenses of the second lens group, in certain matching range, also stable projection image quality.

Description

Zoom lens

Technical field

The present invention is a kind of related zoom lens, the Abbe number of espespecially a kind of single a lens by the first lens group and The optical match of refractive index, can take into account preferableization of material property and focus effects, and single a lens are easy to make, and can be had Effect reduces production cost, in addition the matching of the effective radius of the glass aspheric lenses of the second lens group and maximum image height, one Determine in matching range, also stable projection image quality.

Background technique

Since the technology of projection arrangement has graduallyd mature, one of primary clustering is zoom lens, also makes image energy clear Imaging, and the technical characteristic of the zoom lens is the first lens group surveyed by one close to projection and one close to the of image source Two lens groups are constituted, and first lens group has negative diopter, are had to divergent rays and second lens group and are just bent Luminosity, to convergent light rays.Usual first lens group and the second lens group are respectively provided with several lens, such as TaiWan, China patent Notification number I 534472, I 529418, I 507727, I 476440, I 476442 etc., it is several Mirror structure is considerably complicated, and the optical design of several lens arrangements, major parameter be Abbe number (Vd), refractive index (Nd), The Abbe number assesses the numerical value of an optical system dispersive power quality, and when Abbe number is smaller, then degree of dispersion is bigger, conversely, When Abbe number is bigger, then dispersion is smaller；The refractive index is when light is after lens, because of travel speed of the light velocity in different materials Difference can make light generate refraction effect, and the refractive index of material can change referred to as dispersion with wavelength, the relationship of the two all with Dispersion is related, in this way, have optical match relationship between the Abbe number and the refractive index.

Secondary person is made projection arrangement can be used not only in office and carries out bulletin, also gradually answered extensively due to optics scientific and technological progress Ornamental video signal, program are carried out for family, therefore, dealer is also directed to reduce and throw to allow projection arrangement to be easy to use and carry The volume of the camera lens of image device is researched and developed, meanwhile, the volume of the camera lens can also reduce that manufacturing cost is excessively high to be lacked when reducing Point.The volume-diminished of the camera lens of the projection arrangement, makes the light-weight of projection arrangement, and it is small also to meet projection arrangement desired by consumer Type, meanwhile, also meeting dealer reduces manufacturing cost, but influences projection imaging quality.

But it looks into, several lens arrangements of the first lens group of prior art, does not consider the optics of Abbe number and refractive index Matching, cannot be considered in terms of material property and focus effects, it is difficult to as the single a lens being easy to make, production can not be effectively reduced The projection imaging quality and manufacturing cost and volume of the zoom lens of cost and the projection arrangement, depend on several lens knots The optical design of structure, and as what the camera lens of the projection arrangement out was weighed and consider in order to uphold justice in the optical design of how several lens arrangements projects into image quality It is also all the project of the invention to be solved between amount and manufacturing cost and volume.

Summary of the invention

Technical problem underlying to be solved by this invention is, overcomes drawbacks described above of the existing technology, and provides one Kind zoom lens, the technical characteristic of the optical match of the Abbe number and refractive index of single a lens of the first lens group also may be used Material property and focus effects are taken into account, the single a lens being easy to make can be gently become, first to solve prior art is saturating The problem of several lens arrangements of lens group, and then the effect of production cost is effectively reduced；It is non-with the glass of the second lens group The effective radius of spherical lens and the matched technical characteristic for forming maximum image height, in certain matching range, also stable throwing The effect of shadow image quality.

The technical solution adopted by the present invention to solve the technical problems is:

A kind of zoom lens sequentially includes: one first lens group by projection side to image source, focuses, and wrap It includes single a lens and is negative lens, the Abbe number of single a lens is set as Vd, refractive index is set as Nd, wherein 23≤Vd ≤50,1.5≤Nd≤1.9；And at least one second lens group, zoom is carried out, and including a positive lens and a negative lens Combination, and the combination of the positive lens and the negative lens is located at the rear of single a lens of first lens group.

It according to feature is before taken off, may also include an aperture, be located in second lens group, and the coke ratio of the aperture is set as 1.8~2.2.

According to feature is before taken off, which includes at least a piece of glass aspheric lenses, the glass aspheric lenses Effective radius be set as SD and form maximum image height being set as MAX IMH, and meet 0.7 < SD/MAX IMH < 1.2.

According to feature is before taken off, the three pieces lens of second lens group are included at least after the aperture.

According to feature is before taken off, which includes at least two groups of balsaming lens of second lens group.

According to feature is before taken off, single a lens of first lens group are meniscus；The positive lens of second lens group Negative lens for biconvex lens and second lens group is that biconcave lens is combined into one first balsaming lens；Second lens group Two lens be respectively sequentially that biconvex lens, biconcave lens are combined into one second balsaming lens, and it is first glued to be located at this Between lens and the aperture；The three pieces lens of second lens group are sequentially that biconvex lens, biconcave lens are combined into one respectively Third balsaming lens and the Glass aspheric biconvex lens.

According to feature is before taken off, single a lens of first lens group are meniscus；The positive lens of second lens group Negative lens for biconvex lens and second lens group is that biconcave lens is combined into one first balsaming lens；Second lens group Two lens be sequentially respectively biconvex lens, biconcave lens one second balsaming lens that is combined into be located at first balsaming lens Between the aperture；The three pieces lens of second lens group are sequentially that biconcave lens, biconvex lens are combined into a third respectively Balsaming lens and the Glass aspheric concave-convex lens.

According to feature is before taken off, single a lens of first lens group are meniscus；The positive lens of second lens group Negative lens for biconvex lens and second lens group is that biconcave lens is combined into one first balsaming lens；Second lens group Two lens be respectively sequentially that biconvex lens, concave-convex lens are located between first balsaming lens and the aperture；This second thoroughly The three pieces lens of lens group are sequentially that meniscus, biconvex lens are combined into a third balsaming lens and the Glass aspheric respectively Concave-convex lens.

According to feature is before taken off, single a lens of first lens group are meniscus；The positive lens of second lens group Negative lens for biconvex lens and second lens group is that biconcave lens is combined into one first balsaming lens；Second lens group Two lens be respectively sequentially that biconvex lens, concave-convex lens are located between first balsaming lens and the aperture；This second thoroughly The three pieces lens of lens group are sequentially that biconcave lens, biconvex lens are combined into a third balsaming lens and the Glass aspheric respectively Biconvex lens.

By technological means is above taken off, the present invention is with the Abbe number of single a lens of first lens group and the light of refractive index It matched technical characteristic is learned, can not only take into account material property and focus effects, and single a lens are easy to make, and can also be had Effect reduces production cost, with the effective radiuses of the glass aspheric lenses of second lens group and forms the matching of maximum image height Technical characteristic, in certain matching range, also stable projection image quality, has the effect of mutually auxiliary multiplication.

The invention has the advantages that the Abbe number of single a lens of its first lens group and the optical match of refractive index Technical characteristic, can also take into account material property and focus effects, gently can be as single a lens for being easy to make, to solve elder generation The problem of several lens arrangements of first lens group of preceding technology, and then the effect of production cost is effectively reduced；It is with second The effective radius of the glass aspheric lenses of lens group and the matched technical characteristic for forming maximum image height, in centainly matching model In enclosing, also the effect of stable projection image quality.

Detailed description of the invention

It is lower and the present invention is further described in conjunction with the accompanying drawings and embodiments.

Figure 1A is the lens configuration schematic diagram of first embodiment of the invention aspect.

Figure 1B is the effective radius and maximum image height schematic diagram of first embodiment of the invention aspect.

Fig. 1 C is focusing and the zoom schematic diagram of first embodiment of the invention aspect.

Fig. 1 D is the transverse light rays sector diagram of first embodiment of the invention aspect.

Fig. 1 E is the curvature of field and distortion figure of first embodiment of the invention aspect.

Fig. 1 F is the lateral chromatic aberration figure of first embodiment of the invention aspect.

Fig. 1 G is the longitudinal aberration diagram of first embodiment of the invention aspect.

Fig. 2A is the lens configuration schematic diagram of second embodiment of the invention aspect.

Fig. 2 B is the effective radius and maximum image height schematic diagram of second embodiment of the invention aspect.

Fig. 2 C is focusing and the zoom schematic diagram of second embodiment of the invention aspect.

Fig. 2 D is the transverse light rays sector diagram of second embodiment of the invention aspect.

Fig. 2 E is the curvature of field and distortion figure of second embodiment of the invention aspect.

Fig. 2 F is the lateral chromatic aberration figure of second embodiment of the invention aspect.

Fig. 2 G is the longitudinal aberration diagram of second embodiment of the invention aspect.

Fig. 3 A is the lens configuration schematic diagram of third embodiment of the invention aspect.

Fig. 3 B is the effective radius and maximum image height schematic diagram of third embodiment of the invention aspect.

Fig. 3 C is focusing and the zoom schematic diagram of third embodiment of the invention aspect.

Fig. 3 D is the transverse light rays sector diagram of third embodiment of the invention aspect.

Fig. 3 E is the curvature of field and distortion figure of third embodiment of the invention aspect.

Fig. 3 F is the lateral chromatic aberration figure of third embodiment of the invention aspect.

Fig. 3 G is the longitudinal aberration diagram of third embodiment of the invention aspect.

Fig. 4 A is the lens configuration schematic diagram of fourth embodiment of the invention aspect.

Fig. 4 B is the effective radius and maximum image height schematic diagram of fourth embodiment of the invention aspect.

Fig. 4 C is focusing and the zoom schematic diagram of fourth embodiment of the invention aspect.

Fig. 4 D is the transverse light rays sector diagram of fourth embodiment of the invention aspect.

Fig. 4 E is the curvature of field and distortion figure of fourth embodiment of the invention aspect.

Fig. 4 F is the lateral chromatic aberration figure of fourth embodiment of the invention aspect.

Fig. 4 G is the longitudinal aberration diagram of fourth embodiment of the invention aspect.

Figure label explanation:

The non-telecentricity zoom lens of 10A, 10B, 10C, 10D

The single a lens of L1

L2 positive lens

L3 negative lens

Bis- lens of L4, L5

L6, L7, L8 three pieces lens

AP aperture

The first lens group of FS

The second lens group of ZM

SD effective radius

MAX IMH maximum image height

CG glass cover-plate

IMA imaging surface

D1 first movement distance

The second moving distance of D2

Specific embodiment

Firstly, please referring to shown in Figure 1A~Fig. 1 G, Fig. 2A~Fig. 2 G, Fig. 3 A~Fig. 3 G, Fig. 4 A~Fig. 4 G, of the invention one Kind zoom lens, sequentially includes: one first lens group FS by projection side to image source, focuses, and including single Lens L1 and be negative lens, the Abbe number of single a lens L1 is set as Vd, refractive index is set as Nd, wherein 23≤Vd≤ 50,1.5≤Nd≤1.9；And at least one second lens group ZM, zoom is carried out, and including a positive lens L2 and a negative lens The combination of L3, and the combination of positive lens L2 and negative lens L3 is after single a lens L1 of first lens group FS Side, but not limited thereto.

It holds, may also include an aperture AP, be located in second lens group ZM, and the coke ratio of aperture AP is set as 1.8 ~2.2, in the present embodiment, three pieces lens L6, L7, L8 of second lens group ZM are included at least after aperture AP；This second thoroughly Lens group ZM includes at least a piece of glass aspheric lenses, and the effective radius of the glass aspheric lenses is set as SD and is formed most Big image height is set as MAX IMH, and meets 0.7 < SD/MAX IMH < 1.2；The zoom lens includes at least second lens group Two groups of balsaming lens of ZM, but not limited thereto.In addition, one glass cover-plate of rear sequential of second lens group ZM The imaging surface IMA of (Cover Glass, CG) and digital micro-mirror device (Digital Micromirror Device, DMD), but It is not limited to this.

It as illustrated in figures 1A and ib, is the first embodiment aspect of zoom lens, first lens group FS's is single a Lens L1 is meniscus；The positive lens L2 of second lens group ZM is the negative lens L3 of biconvex lens and second lens group ZM One first balsaming lens is combined into for biconcave lens；Two lens L4, L5 of second lens group ZM are sequentially biconvex respectively Lens, biconcave lens are combined into one second balsaming lens, and between first balsaming lens and aperture AP；This second Three pieces lens L6, L7, L8 of lens group ZM be sequentially respectively biconvex lens, biconcave lens be combined into a third balsaming lens and The Glass aspheric biconvex lens, the SD of the Glass aspheric biconvex lens is 7.0 and IHM is 8.3.

Also, listing the projection side table that L1R1, L1R2 are respectively single a lens L1 in lens (Lens) in table one And image source side surface；L2R1 is respectively the projection side surface of positive lens L2；L3R1, L3R2 are respectively negative lens L3 Project side surface, image source side surface；L4R1, L5R1, L5R2 are respectively the projection side surface of two lens L4, the L5, image Source surface；APRETURE is aperture AP；L6R1, L7R1, L7R2, L8R1, L8R2 are respectively three pieces lens L6, L7, L8 Projection side surface, image source side surface, and list the radius of the projection side surface of each lens, image source side surface (Radius), the parameter of thickness (Thickness), Abbe number (Vd) and refractive index (Nd), cooperation table two, Glass aspheric It is respectively the projection side surface of the glass aspheric lenses, image source side surface that L8R1, L8R2 are listed in lens (ASPH), side by side Each Conic, 4TH, 6TH, 8TH, 10th, 12th, 14th and 16th of the glass aspheric lenses out.

Table one

Lens	Radius	Thickness	Nd	Vd
					L1R1	82.09	2.00	1.77	49.6
L1R2	27.01	D1
					L2R1	72.80	6.45	1.80	46.6
L3R1	-37.62	1.50	1.49	70.4
					L3R2	17.73	32.80
L4R1	26.24	4.60	1.83	42.7
					L5R1	-46.72	1.00	1.62	36.3
L5R2	40.00	4.40
					APERTURE	INF	1.18
L6R1	15.58	4.60	1.62	63.4
					L7R1	-72.60	0.80	1.76	27.5
L7R2	20.00	4.62
					L8R1	95.00	3.00	1.62	58.2
L8R2	-46.60	D2

Table two

ASPH	L8R1	L8R2
			Radius	95.00	-46.60
Conic	0.00	0.00
			4TH	-7.07E-05	3.74E-06
6TH	2.15E-08	-1.40E-06
			8TH	-2.42E-09	1.20E-07
10th	2.87E-10	-5.10E-09
			12th	-3.87E-12	1.30E-10
14th	7.17E-15	-1.73E-12
			16th	2.16E-16	9.43E-15

As shown in Figure 1 C, there is a first movement distance D1 between the first lens group FS and second lens group ZM； The glass aspheric lenses (ASPH) form the Glass aspheric biconvex lens by table one and table two, and with glass cover-plate CG Between there is one second moving distance D2, carrying out the second lens group ZM, zoom and the first lens group FS are mobile to carry out pair Coke, also forms a non-telecentricity zoom lens 10A, and cooperation table three lists first movement distance D1, second in zoom (Zoom) Wide-angle side (Wide), the parameter of the end Wang Jiao (Tele) of moving distance D2, but not limited thereto.

Table three

Zoom	Wide	Tele
			D1	17.21	9.24
D2	22.00	22.83

Therefore the non-telecentricity zoom lens 10A, with different wave length (0.450,0.480,0.550,0.600,0.630 Micron) the transverse light rays sector diagram that simulates Fig. 1 D respectively, different image heights (IMH) are presented at same imaging surface (IMA) On (IMA:0.0000mm, 1.6600mm, 3.3200mm, 4.9800mm, 6.6400mm, 8.3000mm), and symbol ey, py, ex, Px indicates coordinate axis (maximum scale ± 50.000 micron)；The curvature of field and distortion figure of Fig. 1 E, maximum field of view (Maximum It Field) is 28.073 degree；The lateral chromatic aberration figure of Fig. 1 F, maximum field of view (Maximum Field) are 8.3000 microns；Fig. 1 G Longitudinal aberration diagram, pupil radius (Pupil Radius) be 4.1425 millimeters, also maintain good projection image quality.

It as shown in Figure 2 A and 2 B, is the second embodiment aspect of zoom lens, first lens group FS's is single a Lens L1 is meniscus；The positive lens L2 of second lens group ZM is the negative lens L3 of biconvex lens and second lens group ZM One first balsaming lens is combined into for biconcave lens；Two lens L4, L5 of second lens group ZM are sequentially biconvex respectively Lens, biconcave lens one second balsaming lens that is combined into be located between first balsaming lens and aperture AP；This second thoroughly Three pieces lens L6, L7, L8 of lens group ZM be sequentially respectively biconcave lens, biconvex lens be combined into a third balsaming lens and should Glass aspheric concave-convex lens, the SD of the Glass aspheric concave-convex lens is 6.6 and IHM is 8.3.

Also, listing the projection side table that L1R1, L1R2 are respectively single a lens L1 in lens (Lens) in table four Face, image source side surface；L2R1 is respectively the projection side surface of positive lens L2；L3R1, L3R2 are respectively negative lens L3 Project side surface, image source side surface；L4R1, L5R1, L5R2 are respectively the projection side surface of two lens L4, the L5, image Source surface；APRETURE is aperture AP；L6R1, L7R1, L7R2, L8R1, L8R2 are the projection of the three pieces lens L6, L7, L8 Side surface, image source side surface, and list the projection side surface of the respectively lens, the radius (Radius) of image source side surface, thickness Spend the parameter of (Thickness), Abbe number (Vd) and refractive index (Nd), cooperation table five, in glass aspheric lenses (ASPH) Listing L8R1, L8R2 is respectively the projection side surface of the glass aspheric lenses, image source side surface, and it is non-to list the respectively glass Conic, 4TH, 6TH, 8TH, 10th, 12th, 14th and 16th of spherical lens.

Table four

Lens	Radius	Thickness	Nd	Vd
					L1R1	70.47	3.00	1.80	46.6
L1R2	24.26	D1
					L2R1	72.98	5.79	1.80	46.6
L3R1	-35.18	2.01	1.49	70.4
					L3R2	16.82	25.13
L4R1	22.39	5.35	1.83	42.7
					L5R1	-24.39	0.81	1.72	29.5
L5R2	736.81	3.84
					APERTURE	INF	4.44
L6R1	-17.45	0.80	1.65	33.8
					L7R1	13.90	4.61	1.62	63.4
L7R2	-17.82	0.20
					L8R1	-25.04	4.09	1.61	57.4
L8R2	-17.18	D2

Table five

ASPH	L8R1	L8R2
			Radius	-25.04	-17.18
Conic	0.00	0.00
			4TH	-1.86E-04	-6.25E-05
6TH	7.07E-06	1.18E-06
			8TH	-6.31E-07	-7.38E-08
10th	3.10E-08	2.95E-09
			12th	-8.56E-10	-6.44E-11
l4th	1.24E-11	7.31E-13
			16th	-7.40E-14	-3.31E-15

As shown in Figure 2 C, there is a first movement distance D1 between the first lens group FS and second lens group ZM； The glass aspheric lenses (ASPH) form the Glass aspheric concave-convex lens by table four and table five, and with glass cover-plate CG Between there is one second moving distance D2, carrying out the second lens group ZM, zoom and the first lens group FS are mobile to carry out pair Coke, also forms another non-telecentricity zoom lens 10B, cooperation table six, lists first movement distance D1, in zoom (Zoom) Wide-angle side (Wide), the parameter of the end Wang Jiao (Tele) of two moving distance D2, but not limited thereto.

Table six

Zoom	Wide	Tele
			D1	16.13	9.30
D2	22.00	22.84

Therefore the non-telecentricity zoom lens 10B, with different wave length (0.450,0.480,0.550,0.600,0.630 Micron) the transverse light rays sector diagram that simulates Fig. 2 D respectively, same imaging surface (IMA) present different image heights (IMH) (IMA: 0.0000mm, 1.6600mm, 3.3200mm, 4.9800mm, 6.6400mm, 8.3000mm) on, and symbol ey, py, ex, px table Show reference axis (maximum scale ± 50.000 micron)；The curvature of field and distortion figure of Fig. 2 E, maximum field of view (Maximum Field) It is 28.802 degree；The lateral chromatic aberration figure of Fig. 2 F, maximum field of view (Maximum Field) are 8.3000 microns；The longitudinal direction of Fig. 2 G Aberration diagram, pupil radius (Pupil Radius) are 4.0124 millimeters, also maintain good projection image quality.

It is the 3rd embodiment aspect of zoom lens as shown in Fig. 3 A and Fig. 3 B, first lens group FS's is single a Lens L1 is meniscus；The positive lens L2 of second lens group ZM is the negative lens L3 of biconvex lens and second lens group ZM One first balsaming lens is combined into for biconcave lens；Two lens L4, L5 of second lens group ZM are sequentially biconvex respectively Lens, concave-convex lens are located between first balsaming lens and aperture AP；Three pieces lens L6, L7 of second lens group ZM, L8 is sequentially that meniscus, biconvex lens are combined into a third balsaming lens and the Glass aspheric concave-convex lens respectively, should The SD of Glass aspheric concave-convex lens is 6.6 and IHM is 8.3.

Also, listing the projection side table that L1R1, L1R2 are respectively single a lens L1 in lens (Lens) in table seven Face, image source side surface；L2R1 is respectively the projection side surface of the positive lens (L2)；L3R1, L3R2 are respectively negative lens L3 Projection side surface, image source side surface；L4R1, L4R2, L5R1, L5R2 are respectively the projection side table of two lens L4, the L5 Face, image source side surface；APRETURE is aperture AP；L6R1, L7R1, L7R2, L8R1, L8R2 be three pieces lens L6, L7, Projection side surface, the image source side surface of L8, and list the radius of the projection side surface of the respectively lens, image source side surface (Radius), the parameter of thickness (Thickness), Abbe number (Vd) and refractive index (Nd), cooperation table eight, Glass aspheric is saturating It is respectively the projection side surface of the glass aspheric lenses, image source side surface that L8R1, L8R2 are listed in mirror (ASPH), side by side Each Conic, 4TH, 6TH, 8TH, 10th, 12th, 14th and 16th of the glass aspheric lenses out.

Table seven

Lens	Radius	Thickness	Nd	Vd
					L1R1	67.99	2.00	1.83	42.7
L1R2	24.44	D1
					L2R1	160.53	5.70	1.80	46.6
L3R1	-31.11	1.50	1.49	70.4
					L3R2	18.34	33.08
L4R1	33.70	5.30	1.49	70.4
					L4R2	-43.64	0.20
L5R1	17.55	3.48	1.80	46.6
					L5R2	25.29	4.56
APERTURE	INF	2.74
					L6R1	124.92	0.80	1.73	28.3
L7R1	10.75	4.54	1.50	81.6
					L7R2	-337.17	1.14
L8R1	-26.60	4.44	1.61	58.0
					L8R2	-19.09	D2

Table eight

ASPH	L8R1	L8R2
			Radius	-26.60	-19.09
Conic	0.00	0.00
			4TH	-9.96E-05	-2.53E-05
6TH	-1.14E-07	-1.29E-07
			8TH	7.02E-09	1.08E-08
10th	-1.15E-11	-1.18E-10
			12th	9.86E-14	7.24E-13
14th	1.40E-20	-2.04E-18
			16th	1.06E-23	1.06E-23

As shown in Figure 3 C, there is a first movement distance D1 between the first lens group FS and second lens group ZM； The glass aspheric lenses (ASPH) form the Glass aspheric concave-convex lens by table seven and table eight, and with glass cover-plate CG Between there is one second moving distance D2, carrying out the second lens group ZM, zoom and the first lens group FS are mobile to carry out pair Coke, also forms another non-telecentricity zoom lens 10C, cooperation table nine, lists first movement distance D1, in zoom (Zoom) Wide-angle side (Wide), the parameter of the end Wang Jiao (Tele) of two moving distance D2, but not limited thereto.

Table nine

Zoom	Wide	Tele
			D1	16.71	9.84
D2	22.00	22.91

Therefore the non-telecentricity zoom lens 10C, with different wave length, (0.450,0.480,0.550,0.600,0.630 is micro- Rice) the transverse light rays sector diagram that simulates Fig. 3 D respectively, same imaging surface (IMA) present different image heights (IMH) (IMA: 0.0000mm, 1.6600mm, 3.3200mm, 4.9800mm, 6.6400mm, 8.3000mm) on, and symbol ey, py, ex, px table Show reference axis (maximum scale ± 50.000 micron)；The curvature of field and distortion figure of Fig. 3 E, maximum field of view (Maximum Field) It is 28.300 degree；The lateral chromatic aberration figure of Fig. 3 F, maximum field of view (Maximum Field) are 8.3000 microns；The longitudinal direction of Fig. 3 G Aberration diagram, pupil radius (Pupil Radius) are 4.2729 millimeters, also maintain good projection image quality.

It as shown in fig. 4 a and fig. 4b, is the fourth embodiment aspect of zoom lens, first lens group FS's is single a Lens L1 is meniscus；The positive lens L2 of second lens group ZM is the negative lens L3 of biconvex lens and second lens group ZM One first balsaming lens is combined into for biconcave lens；Two lens L4, L5 of second lens group ZM are sequentially biconvex respectively Lens, concave-convex lens are located between first balsaming lens and aperture AP；Three pieces lens L6, L7 of second lens group ZM, L8 is sequentially that biconcave lens, biconvex lens are combined into a third balsaming lens and the Glass aspheric biconvex lens respectively, should The SD of Glass aspheric biconvex lens is 6.55 and IHM is 8.3.

Also, listing the projection side table that L1R1, L1R2 are respectively single a lens L1 in lens (Lens) in table ten Face, image source side surface；L2R1 is respectively the projection side surface of positive lens L2；L3R1, L3R2 are respectively negative lens L3 Project side surface, image source side surface；L4R1, L4R2, L5R1, L5R2 are respectively the projection side table of two lens L4, the L5 Face, image source side surface；APRETURE is aperture (AP)；L6R1, L7R1, L7R2, L8R1, L8R2 be three pieces lens L6, Projection side surface, the image source side surface of L7, L8, and list the radius of the projection side surface of the respectively lens, image source side surface (Radius), the parameter of thickness (Thickness), Abbe number (Vd) and refractive index (Nd), cooperation table 11, glass aspheric It is respectively the projection side surface of the glass aspheric lenses, image source side surface that L8R1, L8R2 are listed in face lens (ASPH), And list Conic, 4TH, 6TH, 8TH, 10th, 12th, 14th and 16th of the respectively glass aspheric lenses.

Table ten

Lens	Radius	Thickness	Nd	Vd
					L1R1	75.04	1.60	1.77	49.6
L1R2	25.21	D1
					L2R1	125.10	5.56	1.77	49.6
L3R1	-30.61	4.62	1.52	52.4
					L3R2	18.25	29.80
L4R1	34.27	4.51	1.49	70.2
					L4R2	-44.18	0.10
L5R1	19.16	3.35	1.81	40.9
					L5R2	26.33	4.87
APERTURE	INF	6.32
					L6R1	-32.56	1.00	1.72	29.5
L7R1	13.05	4.42	1.62	63.3
					L7R2	-27.77	0.10
L8R1	135.57	1.77	1.61	57.9
					L8R2	-128.58	D2

Table 11

ASPH	L8R1	L8R2
			Radius	135.57	-128.58
Conic	0.00	0.00
			4TH	-3.09E-05	4.03E-06
6TH	-8.35E-07	-2.67E-07
			8TH	4.71E-08	2.11E-08
10th	-1.39E-09	-5.99E-10
			12th	2.35E-11	1.15E-11
14th	-1.45E-13	-7.41E-14
			16th	0.00E+00	0.00E+00

As shown in Figure 4 C, there is a first movement distance D1 between the first lens group FS and second lens group ZM； The glass aspheric lenses (ASPH) form the Glass aspheric biconvex lens by table ten and table 11, and with the glass cover-plate There is one second moving distance D2, carrying out the second lens group ZM, zoom and the first lens group FS are mobile to carry out pair between CG Coke, also forms another non-telecentricity zoom lens 10D, cooperation table 12, listed in zoom (Zoom) first movement distance D1, Wide-angle side (Wide), the parameter of the end Wang Jiao (Tele) of second moving distance D2, but not limited thereto.

Table 12

Zoom	Wide	Tele
			D1	16.81	9.45
D2	22.00	22.87

Therefore the non-telecentricity zoom lens 10D, with different wave length (0.450,0.480,0.550,0.600,0.630 Micron) the transverse light rays sector diagram that simulates Fig. 4 D respectively, same imaging surface (IMA) present different image heights (IMH) (IMA: 0.0000mm, 1.6600mm, 3.3200mm, 4.9800mm, 6.6400mm, 8.3000mm) on, and symbol ey, py, ex, px table Show reference axis (maximum scale ± 50.000 micron)；The curvature of field and distortion figure of Fig. 4 E, maximum field of view (Maximum Field) are 27.917 degree；The lateral chromatic aberration figure of Fig. 4 F, maximum field of view (Maximum Field) are 8.3000 microns；Longitudinal picture of Fig. 4 G Difference figure, pupil radius (Pupil Radius) are 4.2482 millimeters, also maintain good projection image quality.

Based on above-mentioned composition, first lens group FS of the invention only single a lens L1, single a lens L1 The matching of this optical characteristics, can take into account material property and focus effects reach preferableization, and single a lens L1 and make It is easy, can effectively reduce production cost, and the effective radius SD of the glass aspheric lenses of second lens group ZM and formed The matched technical characteristic of maximum image height (MAX IMH), in certain matching range, also can stable projection image quality, have phase The effect of auxiliary multiplication.

The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, it is all It is any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention, still falls within In the range of technical solution of the present invention.

In conclusion the present invention designs, in structure using on practicability and cost-effectiveness, complying fully with industry development institute It needs, and revealed structure is also to have unprecedented innovative structure, there is novelty, creativeness, practicability, meet related The regulation of invention patent requirement, therefore lift application in accordance with the law.

Claims (10)

1. a kind of zoom lens, which is characterized in that sequentially include: by projection side to image source

One first lens group, focuses, and including single a lens and is negative lens, and the Abbe number of single a lens is set Be set to Vd, refractive index is set as Nd, wherein 23≤Vd≤50,1.5≤Nd≤1.9；And

At least one second lens group carries out zoom, and the combination including a positive lens and a negative lens, and the positive lens and this The combination of negative lens is located at the rear of single a lens of first lens group.

2. zoom lens according to claim 1, which is characterized in that further include an aperture, is located in second lens group, And the coke ratio of the aperture is set as 1.8~2.2.

3. zoom lens according to claim 1, which is characterized in that it is non-that second lens group includes at least a sheet glass Spherical lens, the effective radius of the glass aspheric lenses are set as SD and form maximum image height being set as MAX IMH, and accord with Close 0.7 < SD/MAX IMH < 1.2.

4. zoom lens according to claim 2, which is characterized in that including at least second lens group after the aperture Three pieces lens.

5. zoom lens according to claim 1, which is characterized in that the zoom lens includes at least second lens group Two groups of balsaming lens.

6. zoom lens according to claim 4, which is characterized in that single a lens of first lens group are convex-concave Lens；The positive lens of second lens group is that the negative lens of biconvex lens and second lens group is that biconcave lens is combined into one First balsaming lens；Two lens of second lens group are sequentially that biconvex lens, biconcave lens are combined into one second respectively Balsaming lens, and between first balsaming lens and the aperture；The three pieces lens of second lens group are sequentially double respectively Convex lens, biconcave lens are combined into a third balsaming lens and the Glass aspheric biconvex lens.

7. zoom lens according to claim 4, which is characterized in that single a lens of first lens group are convex-concave Lens；The positive lens of second lens group is that the negative lens of biconvex lens and second lens group is that biconcave lens is combined into one First balsaming lens；Two lens of second lens group are sequentially that biconvex lens, biconcave lens are combined into one second respectively Balsaming lens is located between first balsaming lens and the aperture；The three pieces lens of second lens group are sequentially that concave-concave is saturating respectively Mirror, biconvex lens are combined into a third balsaming lens and the Glass aspheric concave-convex lens.

8. zoom lens according to claim 4, which is characterized in that single a lens of first lens group are convex-concave Lens；The positive lens of second lens group is that the negative lens of biconvex lens and second lens group is that biconcave lens is combined into one First balsaming lens；Two lens of second lens group are sequentially that be located at this first glued for biconvex lens, concave-convex lens respectively Between lens and the aperture；The three pieces lens of second lens group are sequentially that meniscus, biconvex lens are combined into one respectively Third balsaming lens and the Glass aspheric concave-convex lens.

9. zoom lens according to claim 4, which is characterized in that single a lens of first lens group are convex-concave Lens；The positive lens of second lens group is that the negative lens of biconvex lens and second lens group is that biconcave lens is combined into one First balsaming lens；Two lens of second lens group are sequentially that be located at this first glued for biconvex lens, concave-convex lens respectively Between lens and the aperture；The three pieces lens of second lens group are sequentially that biconcave lens, biconvex lens are combined into one respectively Third balsaming lens and the Glass aspheric biconvex lens.

10. a kind of zoom lens, which is characterized in that sequentially include: by projection side to image source

One first lens group, focuses, and including single a lens and is negative lens, and the Abbe number of single a lens is set Be set to Vd, refractive index is set as Nd, wherein 23≤Vd≤50,1.5≤Nd≤1.9；

At least one second lens group carries out zoom, and including a positive lens and a negative lens to be combined into one first glued saturating Mirror, and the combination of the positive lens and the negative lens is located at the rear of single a lens of first lens group, furthermore, this is second thoroughly Lens group includes at least a piece of glass aspheric lenses, and the effective radius of the glass aspheric lenses is set as SD and forms maximum Image height is set as MAX IMH, and meets 0.7 < SD/MAX IMH < 1.2；And

One aperture is located in second lens group, and the coke ratio of the aperture is set as 1.8~2.2, furthermore, after the aperture at least Three pieces lens including second lens group be sequentially respectively a third balsaming lens and the glass aspheric lenses and this second Two lens of lens group are located between first balsaming lens and the aperture.