CN1189628A - Liquid crystal display projection lens - Google Patents

Abstract

A projection lens for use with LCD panels is provided. The lens has two aspherical meniscus elements which are concave to each other and are located in the vicinity of the lens' aperture stop and a color-correcting doublet which provides most of the positive optical power of the lens. The lens can also include an aspherical corrector lens element of weak optical power which is located on the side of the two meniscus elements opposite to the color correcting doublet.

Description

LCD projection lens

The present invention relates to projecting lens, relate in particular to the projecting lens that can be used in the object image that formation is made up of pixel (such as LCD).

Projection lens system (being also referred to as " optical projection system " here) is used for forming the image of object on a film viewing screen.The basic structure of this system is shown in Fig. 8, wherein 10 be light source (for example, halogen tungsten lamp), the 12nd, the illumination optical device, this device forms the resembling of light source " output " of irradiation system (below be called), and the 14th, the object (for example, the matrix that switches on and off pixel of LCD panel) of projection, and 13 are the projecting lens that are made of a plurality of lens elements, and it forms the enlarged image of object 14 on film viewing screen 16.

The projection lens system that is projected object and is LCD or other pixelation panels has many application, comprises data presentation system.This projection lens system preferably uses single projecting lens, its formed image or for example have the image of the single panel of redness, green and blue picture element, or three independent panels (each panel is used for a kind of color).For the purpose of explanation, will take to use the projection lens system of single LCD panel in the following discussion, should be understood that the present invention also can be used to use the system of a plurality of panels and/or other pixelation types (pixelization).

The projecting lens that is used for the pixelation panel has been described, comprising the U.S. Patent No. 4,189 of Taylor in many patents, 211, people's such as Tanaka U.S. Patent No. 5,042,929, people's such as Yano U.S. Patent No. 5,179,473, the U.S. Patent No. 5,200 of Moskovich, 861, the U.S. Patent No. 5,218 of Moskovich, 480, people's such as Iizuka U.S. Patent No. 5,278,698, the U.S. Patent No. 5 of Betensky, 313,330, and the U.S. Patent No. 5 of Yano, 331,462.The discussion of relevant LCD system can be found in following document: people's such as Gagnon U.S. Patent No. 4,425,028, the U.S. Patent No. 4,461,542 of Gagnon, the U.S. Patent No. 4,826,311 of Ledebuhr, and EPO patent gazette No.311,116.

Projecting lens of the present invention comprises aspheric surface meniscus shaped element, an aperture stop and positive light coke color correction doublet of the symmetry that two cambers are big, two meniscus shaped lenses face one another with recessed surface, and more weak lens of focal power preferably, aperture stop is near meniscus shaped lens, for example, between them, and doublet is before or after these falcates.

These projecting lens provide enough degree of freedom to come correcting lens aberration satisfactorily.The aspheric surface meniscus shaped element provides the most of positive contribution of spherical aberration, comatic aberration and field curvature aberration for correcting lens, thereby has compensated the contribution to the passiveness of these aberrations that is brought by the strong doublet of focal power.The color correction doublet not only provides necessity of lens chromatic aberrations to proofread and correct, but also most of focal power of the lens that provide.By adopting non-spherical surface and, having realized astigmatic correction with the position of aperture stop with respect to the focal power group.By using additional non-spherical element, for example, comprise the corrector unit of one or more lens elements, can further improve correction to distortion.

When the aspheric surface meniscus shaped element was placed the object side of color correction doublet, the back focal length of lens combination became and is substantially equal to or greater than the focal length of total system.On the other hand, when doublet was an anterior member, with respect to the focal length of system, it is very short that the back focal length of system becomes, and makes the ratio of dolly-out,ing dolly-back (telephoto ratio) of system approach 1.

The focal length of doublet is always short than the absolute value of the focal length of each aspheric surface falcate element.Aspheric surface falcate element can be identical mutually.When adopting plastics to do, the cost of these elements is very low, thereby, can make whole lens in very economical ground in a large amount of the production.

Shown in following Example, the maximal rate that lens combination has is f/2.8, and total fan-shaped visual field (angularcoverage) is about 50 degree.

Fig. 1 to 7 is the projecting lens schematic side view according to the present invention's structure.

Fig. 8 is the synoptic diagram that the whole projection lens system that can adopt projecting lens of the present invention is shown.

The above-mentioned accompanying drawing that is included in the instructions and constitutes the part of instructions shows preferred embodiment of the present invention, and together with describing principle of the present invention is described with these accompanying drawings.Certainly, should be understood that these accompanying drawings and description only are used for explanation rather than restriction the present invention.

Fig. 1 to 7 has described the various projecting lens according to the present invention's structure.Corresponding explanation and optical property are shown in table 1 respectively to 7.For the glass that in lens combination, uses, adopt the HOYA or the SCHOTT trade mark.In practice of the present invention, can adopt the glass that is equal to by other manufacturer's manufacturing.For styrene and polypropylene element, adopt industrial material of allowing.

The asphericity coefficient of listing in table is used for following formula: $z=\frac{c{y}^2}{1+{[1-(1+k\left)c^2{y}^2\right]}^{1/2}}+D{y}^4+E{y}^6+F{y}^8+G{y}^{10}+H{\mathrm{<figure-callout\; id="12"\; label="y"\; filenames="A9711087000311.png"\; state="\{\{state\}\}">y</figure-callout>}}^{12}+I{y}^{14}$

Here, z is to be the surperficial sag at y place in the distance from systematic optical axis, and c is the curvature of lens at the optical axis place, and k is the constant of the cone.

Abbreviation used in the table is as follows:

The EFL equivalent focal length

Vertex distance before the FVD

F/ f number

The ENP entrance pupil

The EXP emergent pupil

The BRL optical tube length

The OBJHT object height

The MAG magnification

STOP aperture stop position

The IMD image distance

The OBD object distance

The OVL total length

In table, the mark " a " relevant with each surface represented aspheric surface,, has a non-vanishing surface among the D in above-mentioned formula, E, F, G, H or the I at least that is.Conical surface of mark " c " expression, for conical surface, the k value in the above-mentioned formula is non-vanishing.Mark " f " is represented the Fresnel Lenses surface.The all sizes that provide in the table are unit with the millimeter.Hypothesis light is advanced in the drawings from left to right when making these tables.In practice, viewing screen will be at left, and the LCD panel will be right-hand, and light will be advanced from right to left.Surface 11 in the table 5 is artificial diaphragms, and it makes system is the heart far away in the short conjugation side of Fresnel Lenses; Surface 6 in the table 7 is halation surfaces.

Table 8 has been summed up the various performances of the lens combination of Fig. 1～7." the total focal length " that occurs in this table do not comprise the Fresnel Lenses of Fig. 5 to 7, because Fresnel Lenses only plays a part the optical devices of lens combination with irradiation usefulness are coupled together basically." distance between the meniscus shaped lens " value in the table be between the outside surface of two meniscus shaped lenses that face one another (summit), measure." aperture stop position " is the absolute value of aperture stop from the distance of the central point of those outside surfaces." corrector focal length " is used for the front lens element of Fig. 2 and the back lens element of Fig. 5 to 7.

Table 8 illustrates, and for all examples, doublet is the strongest element of this system's focal power, and the value of the focal length of each other element is short in its focal distance ratio system.This table also illustrates, except example 6, the focal power of falcate element a little less than, that is, the ratio of total focal length of the value of the focal length of each falcate element and system is greater than 2.0.Similarly, if adopt the corrector lens element, then its focal power also a little less than, that is, the ratio of total focal length of the value of its focal length and system is also greater than 2.0.

This table also shows, aperture stop or between the meniscus shaped lens that faces one another (example 1～2 and 5～7) perhaps is positioned at (example 3～4) near their.Aperture stop is preferably between meniscus shaped lens.If aperture stop to the ratio of the distance between those outside surfaces of the size of meniscus shaped lens outside surface central point distance and meniscus shaped lens less than 0.6 (example 4) and preferably less than 0.55 (example 3), then aperture stop is thought of as near meniscus shaped lens.

Research table 1 is to 7, the preferable performance of another of projecting lens of the present invention as can be seen, that is, and the color correction doublet with mutual towards meniscus shaped lens between spacing very little, this spacing is preferably less than 0.3 times of the total focal length of projecting lens.Similarly, if adopt the corrector element, then preferably its is placed near the meniscus shaped lens that faces one another, that is, it at interval had better be less than 0.3 times of total focal length of projecting lens.

Though described certain embodiments more of the present invention, should understand that according to top announcement, all changes that do not deviate from the scope of the invention and spirit will be conspicuous for those skilled in the art.

Table 1 lens data

The surface

Numbering type radius thickness glass clear bore

1 a 30.0023 8.00000 ACRYLIC 44.87

2 a 24.9608 29.76190 37.56

3 a -24.9608 8.00000 ACRYLIC 39.36

4 a -30.0023 1.00000 45.80

5 -2875.5764 3.00000 F2 51.16

6 52.1781 20.00000 SKS 57.31

7-54.3179 141.16060 58.89 marks are described

A-polynomial expression aspheric surface

Focal shift=-0.07359 even power multinomial non-spherical surface numbering D E F G H I 1 1.2884E-07 2.8838E-09-1.0091E-11 3.5519E-14-6.8241E-17 6.9094E-20 2 1.3279E-06-3.2546E-09 1.2088E-11 9.1703E-14-4.8592E-16 7.5718E-19 3-1.3279E-06 3.2546E-09-1.2088E-11-9.1703E-14 4.8592E-16-7.5718E-19 4-1.2884E-07-2.8838E-09 1.0091E-11-3.5519E-14 6.8241E-17-6.9094E-20

Wavelength

0.54610 0.48000 0.64380 0.43580 0.70652 system's single order character

OBJ.HT：-762.00 f/ 2.90?MAG： -0.0600

STOP：4.66?after?surface?2.DIA：36.640

EFL：119.048 FVD：210.923 ENP：?11.4341

IMD：141.161 BRL：69.7619 EXP：-105.441

OBD：-2031.87 OVL：2242.79

The single order character of table 1 (continuing) element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 -0.15806E-02 -632.68 67.029 55.766

2 3?4 -0.15806E-02 -632.68 -55.766 -67.029

3 5?6 -0.12182E-01 -82.086 1.8136?-0.32908E-01

The single order character of 467 0.20672E-01,48.375 6.6194-6.8909 doublets

Element surface

Numbering numbering focal power f ' lpp l ' pp

The single order character of 3457 0.10165E-01,98.379 15.342 1.0819 lens

Variable focal length

Position Number focal power f ' lpp l ' pp

N/A 0.84000E-02 19.05 71.315 15.043

Table 2 lens data

The surface

Numbering type radius thickness glass clear bore

1 a 80.0000 10.00000 ACRYLIC 64.29

2 a 200.0000 0.50000 59.26

3 a 29.0511 8.00000 ACRYLIC 49.90 .

4 a 22.4661 29.59616 40.09

5 a -22.4661 8.00000 ACRYLIC 34.57

6 a -29.0511 0.50000 39.77

7 -234.1952 3.00000 F2 41.07

8 44.3713 16.00000 SKS 43.17

9-44.3713 118.83699 44.97 marks are described

A-polynomial expression aspheric surface

Focal shift=-0.70675 even power multinomial non-spherical surface numbering D E F G H I 1 2.1107E-06-3.4815E-10 2.0450E-12 6.8909E-16-1.4974E-18 1.1302E-21 2 1.7984E-06 1.0365E-09 9.1578E-13 1.3971E-15 8.9705E-19-1.5435E-21 3-2.5443E-06 1.0338E-09-7.7806E-12 1.2923E-14-7.8923E-18-6.2206E-22 4-3.9686E-06-9.4447E-11-1.5516E-11-3.8312E-14 1.6654E-16-2.7211E-19 5 3.9686E-06 9.4447E-11 1.5516E-11 3.8312E-14-1.6654E-16 2.7211E-19 6 2.5443E-06-1.0338E-09 7.7806E-12-1.2923E-14 7.8923E-18 6.2206E-22

Wavelength

0.54610 0.48000 0.64380 0.43580 0.70652 system's single order character

OBJ.HT：-762.00 f/ 2.90?MAG： -0.0600

STOP：16.26?after?surface?4.DIA：34.456

EFL：118.996 FVD：194.433 ENP：?37.2862

IMD：118.837 BRL：75.5962 EXP：-56.3663

OBD：-2029.88 OVL：2224.32

The single order character of table 2 (continuing) element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 0.38053E-02 262.79 -4.3433 -10.858

2 3?4 -0.29812E-02 -335.43 39.483 30.533

3 5?6 -0.29812E-02 -335.43 -30.533 -39.483

4 7?8 -0.167993-01 -59.528 1.5466 -0.29302

The single order character variable focal length Position Number focal power f ' lpp l ' pp of single order character element surface numbering numbering focal power f ' lpp l ' pp 4579 0.10446E-01 95.727 15.072 3.7477 lens of 589 0.24872E-01,40.206 5.3880-5.3880 doublets

N/A 0.84036E-02 119.00 72.381-6.5921 table 3 lens datas

The surface

Numbering type radius thickness glass clear bore

1 39.1113 20.00000 SKS 51.11

2 -109.9088 3.00000 F2 42.37

3 56.5025 0.02133 35.13

4 a 25.4140 8.00000 ACRYLIC 33.39

5 a 25.0802 15.14509 21.51

6 a -25.0802 8.00000 ACRYLIC 27.32

7 a-25.4140 71.84562 34.22 mark is described

A-polynomial expression aspheric surface

Focal shift=-1.29081 even power multinomial non-spherical surfaces numbering D E F G H I 4 9.3348E-06 6.1762E-10 1.3737E-10-1.3591E-13-1.3300E-15 6.5744E-18 5 1.6160E-05 9.7479E-08-4.0004E-10 2.8906E-13 1.6794F-14-2.5935E-17 6-1.6160E-05-9.7479E-08 4.0004E-10-2.8906E-13-1.6794E-14 2.5935E-17 7-9.3348E-06-6.1762E-10-1.3737E-10 1.3591E-13 1.3300E-15-6.5744E-18

Wavelength

0.54610 0.48000 0.64380 0.43580 0.70652 system's single order character

OBJ.HT：-762.00 f/ 2.90?MAG： -0.0600

STOP：1.48?after?surface?2.?DIA：36.956

EFL：119.003 FVD：126.012 ENP：?16.9311

IMD：71.8456 BRL：54.1664 EXP：-32.9660

OBD：-2109.55 OVL：2235.56

The single order character of table 3 (continuing) element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 0.19480E-01 51.335 3.4715 -9.7556

2 2?3 -0.16839E-01 -59.385 1.2116 -0.62288

3 4?5 0.17900E-02 558.66 -58.905 -58.131

The single order character of 467 0.17900E-02,558.66 58.131 58.905 doublets

Element surface

Numbering numbering focal power f ' lpp l ' pp

The single order character of 1213 0.62383E-02,160.30-26.132-34.869 lens

Variable focal length

Position Number focal power f ' lpp l ' pp

N/A 0.84032E-02 119.00 -7.1680 -53.007

Table 4 lens data

The surface

Numbering type radius thickness glass clear bore

1 36.9251 3.00000 F2 47.74

2 22.2592 15.00000 SK5 40.35

3 49.2463 0.02133 36.53

4 a 25.5722 8.00000 ACRYLIC 35.00

5 a 25.9015 18.73549 29.13

6 a -25.9015 8.00000 ACRYLIC 29.59

7 a-25.5722 73.75932 36.28 mark is described

A-polynomial expression aspheric surface

Focal shift=-1.45996 even power multinomial non-spherical surfaces numbering D E F G H I 4 9.5718E-06-5.4522E-09 1.4180E-10-1.4316E-13-1.3364E-15 5.5038E-18 5 1.5679E-05 9.1338E-08-3.4546E-10-3.4615E-13 1.3504E-14-1.3390E-17 6-1.5679E-05-9.1338E-08 3.4546E-10 3.4615E-13-1.3504E-14 1.3390E-17 7-9.5718E-06 5.4522E-09-1.4180E-10 1.4316E-13 1.3364E-15-5.5038E-18

Wavelength

0.54610 0.48000 0.64380 0.43580 0.70652 system's single order character

OBJ.HT：-762.00 f/ 2.90?MAG： -0.0600

STOP：12.70?after?surface?2.DIA：39.268

EFL：119.000 FVD：126.516 ENP：?11.6502

IMD：?73.7593 BRL：52.7568 EXP：-38.8206

OBD：-2104.15 OVL：2230.66

The single order character of table 4 (continuing) element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 -0.10260E-01 -97.463 5.0476 3.0428

2 2?3 0.17568E-01 56.922 -6.4433 -14.255

3 4?5 0.22169E-02 451.09 -46.054 -46.647

The single order character of 467 0.22169E-02,451.09 46.647 46.054 doublets

Element surface

Numbering numbering focal power f ' lpp l ' pp

The single order character of 1213 0.55976E-02,178.65-24.724-31.643 lens

Variable focal length

Position Number focal power f ' lpp l ' pp

N/A 0.84034E-02 119.00 -1.8193 -50.920

Table 5 lens data

The surface

Numbering type radius thickness glass clear bore

1 33.1198 15.00000 SK5 43.45

2 -70.5388 3.00000 F2 39.47

3 64.9694 0.20000 34.97

4 a 22.3871 6.00000 ACRYLIC 32.19

5 a 18.0073 18.43017 26.67

6 a -18.0073 6.00000 ACRYLIC 25.45

7 a -22.3871 0.50000 31.44

8 -300.0000 6.00000 ACRYLIC 37.27

9 a -94.4823 59.52572 40.14

10 af 75.0000 3.00000 ACRYLIC 90.30

11 ∞ -9999.99902 90.43

12 ∞, 10009.94644 4285.85 marks are described

A-polynomial expression aspheric surface

The f-Fresnel

Focal shift=-1.00766 even power polynomial expression non-spherical surfaces numbering D E F G H I 4 8.8261E-06-6.3031E-08 5.0057E-10-7.7626E-13-3.3165E-15 1.2365E-17

1.4180E-05 -1.0090F-07 1.0531E-09 9.3555E-13 -3.9394E-14 1.4140E-16?6 -1.4180E-05 1.0090E-07 -1.0531E-09 -9.3555E-13 3.9394E-14 -1.4740E-16?7 -8.8261E-06 6.3031E-08 -5.0057E-10 7.7626E-13 3.3165E-15 -1.2365E-17?9 -1.9383E-06 1.0274E-09 7.0216E-13 -4.3876E-15 -9.2113E-18 2.7872E-2010 -1.7284E-07 -1.5754E-10 9.0633E-14 -2.3590E-17 -2.3498E-20 9.8370E-24

Wavelength

0.54610 0.48000 0.64380 0.43580 0.70652 system's single order character

OBJ.HT：-762.00 f/ 2.90?MAG： -0.0600

STOP：11.16?after?surface?2.D1A： 31.920

EFL：119.007 FVD：127.604 ENP：22.9392

IMD：10009.9 BRL：-9882.34 EXP：9760.21

OBD.-2018.64 OVL：2146.25

The single order character of table 5 (continuing) element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 0.24830E-01 40.274 3.1827 -6.7785

2 2?3 -0.18610E-01 -53.735 0.95345 -0.87817

3 4?5 -0.29354E-02 -340.67 37.522 30.181

5 8?9 0.36148E-02 276.64 5.8072 1.8289

The single order character of 6 10 11 0.65837E-02 151.89 0.00000E+00-2.0083 doublets

Element surface

Numbering numbering focal power f ' lpp l ' pp

The single order character of 1213 0.97931E-02,102.11-11.511-20.483 lens

Variable focal length

Position Number focal power f ' lpp l ' pp

N/A 0.84029E-02 119.01 83.807 9884.8

Table 6 lens data

The surface

Numbering type radius thickness glass clear bore

1 29.1621 17.00000 SK18 45.89

2 -139.4548 3.00000 F2 39.89

3 26.9691 0.50000 30.20

4 a 26.5557 6.00000 ACRYLIC 29.72

5 a 32.7898 13.49087 26.02

6 a -32.7898 6.00000 ACRYLIC 26.60

7 a -26.5557 1.00000 30.84

8 a -23.0582 9.00000 ACRYLIC 31.49

9 a -30.5640 59.03559 39.98

10 cf 61.9388 3.00000 ACRYLIC 110.75

11 ∞, 9.99761 110.60 marks are described

A-polynomial expression aspheric surface

The c-conical section

The f-Fresnel

Focal shift=-1.11420 circular cones

The surface

The numbering constant

10-1.2035E+00 even power multinomial non-spherical surface numbering D E F G H I 4 1.3240E-05-5.5822E-08 5.4959E-10-8.6016E-13-3.1443E-15 1.4241E-17 5 2.6931E-05-6.9112E-08 1.0553E-09-1.2398E-12-1.7533E-14 8.7717E-17 6-2.6931E-05 6.9112E-08-1.0553E-09 1.2398E-12 1.7533E-14-8.7717E-17 7-1.3240E-05 5.5822E-08-5.4959E-10 8.6016E-13 3.1443E-15-1.4241E-17 8 4.8903E-06-4.3360E-08 9.8937E-11 5.1194E-14-1.7310E-15 2.3803E-18 9-3.0755E-06-3.1743E-09-3.9576E-11 7.3867E-14-4.2264E-17-1.9105E-19 wavelength

0.54610 0.48000 0.64380 0.43580 0.70652

Table 6 (continuing) system's single order character

OBJ.HT：-916.40 f/ 2.90?MAG： -0.0600

STOP：10.29?after?surface?2.DIA：28.290

EFL：119.000 FVD：128.024 ENP：?26.3928

IMD：9.99761 BRL：118.026 EXP：-331.152

The single order character of OBD:-1999.20 OVL:2127.22 element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 0.25541E-01 39.152 1.8648 -8.9177

2 2?3 -0.27807E-01 -35.962 1.5372 -0.29728

3 4?5 0.46598E-02 214.60 -12.980 -16.028

4 6?7 0.46598E-02 214.60 16.028 12.980

5 8?9 -0.31745E-02 -315.01 -30.662 -40.643

The single order character of 6 10 11 0.79720E-02 125.44 0.00000E+00-2.0083 doublets

Element surface

Numbering numbering focal power f ' lpp l ' pp

1213 0.51599E-02 193.80-54.477-52.049 lure the single order character of mirror

Variable focal length

Position Number focal power f ' lpp l ' pp

N/A 0.84034E-02 119.00 103.14 -115.03

Table 7 lens data

The surface

Numbering type radius thickness glass clear bore

1 30.7661 19.80000 SK18 41.40

2 -58.5206 3.30000 F2 35.61

3 37.2142 Space?1 29.59

4 a 40.6518 6.60000 ACRYLIC 29.14

5 a 34.9013 6.62246 25.02

6 * 6.62246 29.37

7 a -34.9013 6.60000 ACRYLIC 31.71

8 a -40.6518 0.60000 42.19

9 a -52.8199 10.00000 ACRYLIC 45.48

10 a -48.2409 Space?2 50.68

11 cf 55.0000 3.00000 ACRYLIC 112.30

12 ∞ Image distance, 112.13 marks are described

A-polynomial expression aspheric surface

The c-conical section

F-Fresnel circular cone

The surface

The numbering constant

11-1.5284E+00 even power multinomial non-spherical surface numbering D E F G H I 4 5.6499E-07 1.0989E-08-2.5366E-11 6.6086E-14-2.9414E-16 6.0750E-19 5 1.2882E-05 3.6695E-09 2.5220E-10-5.7330E-13-1.4211E-15 1.0348E-17 7-1.2882E-05-3.6695E-09-2.5220E-10 5.7330E-13 1.4211E-15-1.0348E-17 8-5.6499E-07-1.0989E-08 2.5366E-11-6.6086E-14 2.9414E-16-6.0750E-19 9-2.4565E-06-3.8370E-09 1.3708E-11 3.4604E-15-5.1456E-17 3.4596E-2010-7.0933E-06-1.4066E-09-8.6822E-12 9.4656E-16 1.8208E-19-2.1320E-20 table 7 (continuing) variable spaces

Variable focal length

1 space, space, 2 focuses

Position T (3) T (10) is offset image distance

1 1.100 52.725 0.146 9.999

2 0.900 48.200 0.358 10.032

3 1.300 60.500-0.140 9.993 wavelength

0.54610 0.48000 0.64380 0.43580 0.70652 system's single order character, position 1

OBJ.HT：-916.40 f/ 2.90?MAG： -0.0600

STOP：-2.43?after?surface?5.OIA：27.159

EFL：119.000 FVD：126.969 ENP：?26.3422

IMD：9.99931 BRL：116.970 EXP：-393.868

OBD:-1992.70 OVL:2119.67 system single order character, position 2

OBJ.HT：-2291.1 f/ 2.82?MAG： -0.0240

STOP：-2.43?after?surface?5.DIA：26.751

EFL：114.312 FVD：122.277 ENP：?25.9078

IMD：10.0317 BRL：112.245 EXP：-315.825

OBD:-4777.58 OVL:4899.85 system single order character, position 3

OBJ.HT：-458.20 f/ 3.15?MAG： -0.1200

STOP：-2.43?after?surface?5.DIA： 26.834

EFL：127.815 FVD：134.938 ENP：?26.7790

IMD：9.99319 BRL：124?945 EXP：-625.681

The single order character of OBD:-1064.68 OVL:1199.62 element

Element surface

Numbering numbering focal power f ' lpp l ' pp

1 1?2 0.29047E-01 34.427 4.5512 -8.6569

2 2?3 -0.27798E-01 -35.974 1.2258 -0.77953

3 4?5 -0.12420E-02 -805.14 50.329 43.210

4 7?8 -0.12420E-02 -805.14 43.210 -50.329

5 9?10 0.15279E-02 654.50 44.847 40.960

The single order character of 6 11 12 0.89778E-02 111.39 0.00000E+00-2.0083 doublets

Element surface

Numbering numbering focal power f ' lpp l ' pp

1?2 1?3 0.92286E-02 108.36 -25.217 -31.885

The single order character of table 7 (continuing) group

The group surface

Numbering numbering focal power f ' lpp l ' pp

1 1?3 0.92286E-02 108.36 -25.217 -31.885

2 4?10 -0.63514E-03 -1574.5 -126.19 -173.51

The single order character of 3 11 12 0.89778E-02 111.39 0.00000E+00-2.0083 lens

Variable focal length

Position Number focal power f ' lpp 1 ' pp

1 0.84033E-02 119.00 109.63 -116.29

2 0.87480E-02 114.31 99.733 -107.38

3 0.78238E-02 127.82 128.27 -133.02

Distance and position 1 98.38-632.68-632.68 119.05 45.76 10.22 2 95.73-335.43-335.43 262.79 119.00 45.60 1.46 3 160.30 558.66 558.66 119.00 31.15 17.12 4 178.65 451.09 451.09 119.00 34.74 19.69 5 102.11-340.67-340.67 276.64 119.01 30.43 7.26 6 193.80 214.60 214.60-315.01 119.00 25.49 5.96 7 108.36-805.14-805.14 654.50 119.00 26.44 9.05 between the total focal length meniscus shaped lens of the table 8 example doublet meniscus shaped lens meniscus shaped lens adjuster aperture stop numbering focal length 1 focal length 2 focal length focal lengths

Claims (11)

1. projecting lens that is used to form object image, described lens have an aperture stop, it is characterized in that, and described projecting lens comprises:

First lens unit, it comprises two meniscus shaped element with focal distance f 1 and f2, and described meniscus shaped element is recessed mutually, and is positioned near the aperture stop, and each described meniscus shaped lens has at least one non-spherical surface; And

Second lens unit, it is by a color correction doublet with focal distance f 3, wherein:

f3＞0；

F3＜| f1|; And

f3＜|f2|。

2. projecting lens as claimed in claim 1 is characterized in that, each meniscus shaped element has weak focal power, and perhaps focal power is identical.

3. projecting lens as claimed in claim 1 is characterized in that, aperture stop is placed between two meniscus shaped element.

4. projecting lens as claimed in claim 1 is characterized in that, first lens unit is in the side that resembles of lens, and second lens unit perhaps turns around in thing one side of lens.

5. as each described projecting lens of claim 1-4, it is characterized in that also comprise a corrector lens unit, described corrector lens unit comprises at least one aspheric surface, have weak focal power, and be positioned at first lens unit one side relative with second lens unit.

6. as claim 1 or 5 described projecting lens, it is characterized in that each described meniscus shaped element has two non-spherical surfaces, and/or the corrector lens unit comprises two non-spherical surfaces.

7. as claim 1 or 5 described projecting lens, it is characterized in that first and second lens units are apart from one another by very near.

8. projecting lens as claimed in claim 5 is characterized in that the corrector lens unit comprises single lens element.

9. projecting lens as claimed in claim 5 is characterized in that, the corrector lens unit is in the side that resembles of first lens unit, perhaps in thing one side of first lens unit.

10. projecting lens as claimed in claim 5 is characterized in that, f1 has identical symbol with f2, and the corrector lens unit has focal distance f CR, and the opposite in sign of the symbol of fCR and f1 and f2.

11. a projection lens system that is used to form object image is characterized in that, described system comprises:

Irradiation system comprises light source and forms the irradiation optical devices of the elephant of light source, the output that likes irradiation system of described light source;

The panel of pixelation, it constitutes object; And

Any projecting lens of claim 1 to 10.

Images