CN101206305A - Zoom lens for projection and projection display device - Google Patents

Zoom lens for projection and projection display device Download PDF

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Publication number
CN101206305A
CN101206305A CNA2007101994851A CN200710199485A CN101206305A CN 101206305 A CN101206305 A CN 101206305A CN A2007101994851 A CNA2007101994851 A CN A2007101994851A CN 200710199485 A CN200710199485 A CN 200710199485A CN 101206305 A CN101206305 A CN 101206305A
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lens
projection
lens combination
zoom lens
mentioned
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CN100582859C (en
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川名正直
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Fujinon Corp
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Fujinon Corp
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Abstract

The present invention discloses a zoom lens for projection including a first group having a negative refractive power, a second group having a positive refractive power, a third group having a positive refractive power, and a fourth group having a positive or negative refractive power, in order from the magnification side. At variable power from a wide-angle end to a telephoto end, the second, third and fourth groups are moved to the magnification side, and the first group is slightly moved to the reduction side. Also, the following conditional expression (1) is satisfied.0.95<frw/frt<1.05 (1). Where frw is a composite focal length of the second G2, third G3 and the fourth G4 groups at the wide-angle end, and frt is a composite focal length of the second G2, third G3 group and fourth G4 groups at the telephoto end. Such that the lens is suitable for projection device using DMD and having high capability, minitype, wild viewing angle and high zoom ratio in condition of not using a plurality of pieces of non-spherical lens.

Description

Zoom lens for projection and projection type image display apparatus
Technical field
The present invention relates to the 4 group Zoom lens for projection and the projection type image display apparatus thereof that constitute of a kind of mounting, relate in particular to a kind of light beam that load is held the image information of coming from the light valve of DMD (digital micromirror device) display device enlarges projection at screen Zoom lens for projection and projection type image display apparatus in projection type image display apparatus etc.
Background technology
In recent years, used the projector apparatus (projection type image display apparatus) of DMD display device by noticeable as light valve.
DMD is following such device: promptly use the cmos semiconductor technology, in that form on the silicon memory chip can be according to the rectangular-shaped micro mirror (mirror elements) of vision signal high reflectance of change degree of tilt in the above scope of 10 degree.Use the projector apparatus of this DMD, control the reflection of light direction of coming, desirable reflected light is collected on the fluorescent screen, and obtains the projection of desirable image by light source by the angle that changes above-mentioned mirror elements.
In DMD, for example, arranging millions of above mirrors on the substrate in length and breadth, whole independently the getting up of mirror that can these are most and carry out digital controlly, therefore, each mirror is corresponding to 1 pixel in each image.
And, different with liquid crystal indicator, owing to do not need irradiates light is carried out polarization, so the loss of light is less, and also more superior aspect the correctness of tone performance.
Like this, the DMD display device has lot of advantages, in order to guarantee the actual effect of such advantage, the requirement of the optical system that is installed on the DMD display device is uprised more.And, more and more higher to the requirement of the good device of the Portability being convenient to carry to using the projector apparatus of DMD, but as optical system be necessary with to this Portability require corresponding.
Yet in using the projector apparatus of DMD, adopt not is configured in the reduced side of projecting lens to the prism of the separation that is used for look synthetic or illumination light projected light and the device of partition type when constituting illuminator so-called more.At this moment, do not need to dispose the interval of above-mentioned prism etc., and, there is no need to make the reduced side of projecting lens to become telecentric iris (テ レ セ Application ト リ Star Network), so, the pupil of reduced side is set in from the near position of panel, require to seek the further miniaturization of lens.In addition, require the suitable high image quality of resolution with device, but also need the zoom of wide viewing angle or hypermutation multiple proportions on the viewpoint of setting property.
As the zoom-lens system that can satisfy to a certain extent as above-mentioned requirement, for example, the known content that has following patent documentation 1 to be put down in writing.
[patent documentation 1] patent disclosure 2004-271668 communique
[patent documentation 2] patent disclosure 2006-078705 communique
[patent documentation 3] patented claim 2006-094052 instructions
In above-mentioned patent documentation 1 described prior art, can wide viewing angle hypermutation multiple proportions headed by, corresponding to above-mentioned all requirements.Yet,,, as also understanding, be necessary to dispose the multi-disc non-spherical lens from this embodiment in order to keep aberration well according to patent documentation 1 described formation.
For this reason, the processing of optical system or the burden of assembling increase, and become the main cause that manufacturing cost rises.
In addition, the conventional art of being put down in writing at above-mentioned patent documentation 2 is, reduced side is constituted as the system of the heart far away (テ レ セ Application ト リ Star Network), so, basically not with miniaturization is compatible as the present application of important topic.And the applicant has proposed as 3 set vari-focus lens in Patent Office, and can reach and the Zoom lens for projection of the similar problem of the present application and projection type image display apparatus (with reference to above-mentioned patent documentation 3).
The present invention uses for reference foregoing and proposes, its purpose is, providing a kind of is not using under the multi-disc non-spherical lens, can reach the decline of wide viewing angle, hypermutation multiple proportions and cost, be applicable to high-performance, compactness and bright, use the Zoom lens for projection and the projection type image display apparatus of the projector apparatus of DMD.
Summary of the invention
Zoom lens for projection of the present invention is characterised in that, constitute by following lens successively from the Zoom Side: the 4th lens combination of the 3rd lens combination of the 2nd lens combination of the 1st lens combination of negative refracting power, positive refracting power, positive refracting power, the refracting power of plus or minus, when from the wide-angle side to the telescope end, becoming times, above-mentioned the 2nd lens combination, above-mentioned the 3rd lens combination and above-mentioned the 4th lens combination move to the Zoom Side, and satisfy following conditional (1):
0.95＜frw/frt＜1.05 (1)
Herein,
Frw: the synthetic focal length of the wide-angle side of above-mentioned the 2nd, the 3rd and the 4th lens combination,
Frt: the synthetic focal length of the telescope end of above-mentioned the 2nd, the 3rd and the 4th lens combination.
In addition, be preferably, satisfy following conditional (2), (3):
|M4/f4|＜|M1/f1|＜|M2/f2|＜|M3/f3| (2)
0.4＜|M3/f3|＜0.8 (3)
Wherein,
Mn: the wide-angle side position of n lens combination and the displacement of telescope end position,
Fn: the focal length of n lens combination.
In addition, also can replace above-mentioned conditional (2), (3), and satisfy following conditional (4), (5):
|M4/f4|＜|M2/f2|＜|M1/f1|＜|M3/f3| (4)
0.2＜|M3/f3|＜0.6 (5)
Wherein,
Mn: the wide-angle side position of n lens combination and the displacement of telescope end position,
Fn: the focal length of n lens combination.
In addition, be preferably, the optical material (glass or resin) of the lens that the refracting power that the formation in above-mentioned the 4th lens combination is born is the strongest satisfies following conditional (6) to the refractive index Nd of d line:
Nd＞1.75 (6)。
In addition, be preferably, dispose the positive lens of convex surface towards reduced side in the most close reduced side of above-mentioned the 4th lens combination.
In addition, be preferably, in above-mentioned the 4th lens combination, dispose 1 non-spherical lens.
In addition, projection type image display apparatus of the present invention is characterised in that, possess: light source, light valve, will be from this light source and each described Zoom lens for projection the illumination light department of the Chinese Academy of Sciences of this light valve of beam direction that comes and the claim 1～6, with above-mentioned light valve the light beam that comes from above-mentioned light source is carried out optical modulation, and project screen by means of above-mentioned Zoom lens for projection.And, in the reduced side configuration of above-mentioned the 4th lens combination with the positive lens of convex surface towards reduced side.
As described above, according to Zoom lens for projection of the present invention and projection type image display apparatus, because lens combination is made as 4 groups of formations, and light amplification rate and anamorphosis function suitably be assigned to each group, therefore, even do not use the multi-disc non-spherical lens, the balance that also can make aberration is for good, and when having the change multiple proportions more than 1.6 times, can obtain the system of the bright wide-angle to 2.05～2.20 degree of F value in wide-angle side.
And, by satisfying the defined terms formula, can further promote miniaturization, and can make all aberrations more good.
And, by the formula of satisfying condition (1), lens combination integral body can be considered as approximate inverse telescopic 2 set vari-focus lens, and can be used as the system of wide viewing angle and long back focus.
Description of drawings
Fig. 1 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 1.
The skeleton diagram of the lens motion track when Fig. 2 is the change times of Zoom lens for projection of expression embodiment 1.
Fig. 3 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 2.
The skeleton diagram of the lens motion track when Fig. 4 is the change times of Zoom lens for projection of expression embodiment 2.
Fig. 5 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 3.
The skeleton diagram of the lens motion track when Fig. 6 is the change times of Zoom lens for projection of expression embodiment 3.
Fig. 7 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 4.
The skeleton diagram of the lens motion track when Fig. 8 is the change times of Zoom lens for projection of expression embodiment 4.
Fig. 9 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 5.
The skeleton diagram of the lens motion track when Figure 10 is the change times of Zoom lens for projection of expression embodiment 5.
Figure 11 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 1.
Figure 12 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 1.
Figure 13 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 1.
Figure 14 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 1.
Figure 15 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 2.
Figure 16 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 2.
Figure 17 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 2.
Figure 18 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 2.
Figure 19 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 3.
Figure 20 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 3.
Figure 21 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 3.
Figure 22 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 3.
Figure 23 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 4.
Figure 24 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 4.
Figure 25 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 4.
Figure 26 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 4.
Figure 27 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 5.
Figure 28 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 5.
Figure 29 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 5.
Figure 30 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 5.
Figure 31 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 6.
The skeleton diagram of the lens motion track when Figure 32 is the change times of Zoom lens for projection of expression embodiment 6.
Figure 33 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 7.
The skeleton diagram of the lens motion track when Figure 34 is the change times of Zoom lens for projection of expression embodiment 7.
Figure 35 is the skeleton diagram of the formation of the related Zoom lens for projection of expression embodiments of the invention 8.
The skeleton diagram of the lens motion track when Figure 36 is the change times of Zoom lens for projection of expression embodiment 8.
Figure 37 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 6.
Figure 38 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 6.
Figure 39 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 6.
Figure 40 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 6.
Figure 41 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 7.
Figure 42 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 7.
Figure 43 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 7.
Figure 44 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 7.
Figure 45 is the aberration diagram of all aberrations (spherical aberration, astigmatism, distortion and multiplying power chromatic aberation) of the Zoom lens for projection of expression embodiment 8.
Figure 46 is the aberration diagram of lateral aberration of wide-angle side of the Zoom lens for projection of expression embodiment 8.
Figure 47 is the aberration diagram of lateral aberration in centre position of the Zoom lens for projection of expression embodiment 8.
Figure 48 is the aberration diagram of lateral aberration of telescope end of the Zoom lens for projection of expression embodiment 8.
Figure 49 is the summary pie graph of the related projection type image display apparatus of one embodiment of the present invention.
Among the figure: L 1～L 11-lens, G 1～G 4-lens combination, X-optical axis, 1,103-DMD, 2-sealing cover glass (light filter portion), 101-light source, 102-column integraph, 104-Zoom lens for projection, 105-screen.
Embodiment
Below, concrete embodiment of the present invention is described with reference to accompanying drawing.Embodiment shown in Figure 1 (represent embodiment 1 device wide-angle side state and represent) related Zoom lens for projection from the Zoom Side successively by the 1st lens combination G with negative refracting power 1, have the 2nd a lens combination G of positive refracting power 2, have the 3rd a lens combination G of positive refracting power 3, and have the 4th lens combination G of the refracting power of plus or minus 4Form, from wide-angle side when telescope end becomes times, above-mentioned the 2nd lens combination G 2, above-mentioned the 3rd lens combination G 3And above-mentioned the 4th lens combination G 4Move to the Zoom Side, set sealing cover glass (light filter portion) 2 and DMD1 at its back segment.In addition, X represents optical axis among the figure.
At this, the 1st lens combination G 1Set successively from the Zoom Side: the 1st lens L that forms by positive lens 1, by the 2nd lens L that the negative meniscus shaped lens of convex surface towards the Zoom Side formed 2, the 3rd lens L that forms by negative lens 3, by the 4th lens L that convex surface is formed towards the positive lens of reduced side 4And by the 5th lens L that the negative lens of concave surface towards the Zoom Side formed 5Form.In addition, pairing with mutually near (embodiment 1～4) or the mode of connecting airtight (embodiment 5～8) set the 4th lens L 4And the 5th lens L 5If independent each other mutually, then the degree of freedom of lens design improves, if connect airtight mutually, then optics adjustment (aim at and adjust) can become easily, so, suitably select to get final product according to situation.
And, the 2nd lens combination G 2The 6th lens L that forms by single positive lens 6Form.
And, the 3rd lens combination G 3The 7th lens L that forms by single positive lens 7Form.
Further, the 4th lens combination G 4From the Zoom Side successively by the 8th lens L that concave surface is formed towards the negative lens of reduced side 8, by the 9th lens L that the negative lens of concave surface towards the Zoom Side formed 9, and by the 10th lens L that convex surface is formed towards the positive lens of reduced side 10And the 11st lens L 11Form.In addition, especially make the 11st lens L 11For with the positive lens of convex surface towards reduced side, so, the densification of the reduced side of system can be promoted.
In addition, the lens of above-mentioned each lens combination constitute the formation that is not limited to above-mentioned shape, and, can increase and decrease negative lens or positive lens more than 1.
And, the 8th lens L is only arranged among above-mentioned each lens 8Be non-spherical lens, remaining all is a spherical lens, because of not using the multi-disc non-spherical lens, so, can seek cheapization of manufacturing cost.In addition, when using 1 non-spherical lens, by this being provided in final lens group (the 4th lens combination G 4) in, can seek the efficient activity of aberration correction.
In addition, in the present embodiment, on lens material, use glass in principle, but, then also can use plastic cement if the various conditions of thermotolerance or temperature conditions etc. are fit to.Especially, using plastic cement on non-spherical lens, is being favourable aspect manufacturing and the cost degradation.
At this, represent the aspheric surface of present embodiment by following aspheric surface formula.
[mathematical expression 1]
Z = Y 2 / R 1 + 1 - K &times; Y 2 / R 2 + &Sigma; i = 3 20 A i Y i
Herein,
Z: the length of the vertical line that is drawn to the section (perpendicular to the plane of optical axis) on aspheric surface summit from the point on the aspheric surface of optical axis distance Y,
Y: leave the distance of optical axis,
R: near the radius-of-curvature the aspheric optical axis,
K: eccentricity,
A i: asphericity coefficient (i=3～20).
And the Zoom lens for projection of present embodiment is constituted as, from the capable change to the side of looking in the distance of wide-angle sidesway times the time, and the 2nd lens combination G 2, the 3rd lens combination G 3And the 4th lens combination G 4All move to the Zoom Side, on the other hand, the 1st lens combination G 1Move some amounts to reduced side.And, also can when becoming times, fix the 1st lens combination G 1
And the related Zoom lens for projection of present embodiment not only satisfies following conditional (1), and makes and to satisfy following conditional (2), (3) and be configured.
0.95＜frw/frt＜1.05 (1)
|M4/f4|＜|M1/f1|＜|M2/f2|＜|M3/f3| (2)
0.4＜|M3/f3|＜0.8 (3)
Wherein,
Frw: the 2nd lens combination G 2, the 3rd lens combination G 3And the 4th lens combination G 4The synthetic focal length of wide-angle side,
Frt: at the 2nd lens combination G 2, the 3rd lens combination G 3And the 4th lens combination G 4The synthetic focal length of telescope end,
Mn: the wide-angle side position of n lens combination and the displacement of telescope end position,
Fn: the focal length of n lens combination.
And, also can replace above-mentioned conditional (2), (3) and satisfy following conditional (4),
(5)。
|M4/f4|＜|M2/f2|＜|M1/f1|＜|M3/f3| (4)
0.2＜|M3/f3|＜0.6 (5)
Wherein,
Mn: the wide-angle side position of n lens combination and the displacement of telescope end position,
Fn: the focal length of n lens combination.
And, make the optical material of the lens that the negative refracting power of formation in above-mentioned the 4th lens combination is the strongest meet the following conditions formula (6) and be configured the refractive index Nd of d line.
Nd＞1.75 (6)
Herein, the technical meaning to above-mentioned conditional (1)～(6) describes.
Conditional (1)～(5) are doubly to share for the change that suitably is set in each lens combination when becoming times.
By satisfying above-mentioned conditional (1), with the 1st lens combination G 1Be used as preceding group, with the 2nd lens combination G 2, the 3rd lens combination G 3And the 4th lens combination G 4Gather when being used as the back group,, can be used as near contrary telescopic 2 set vari-focus lens as lens combination integral body.
Like this, constitute and the contrary approaching type of telescopic 2 set vari-focus lens, and can with wide viewing angle and back focus long require corresponding.
On the other hand, when constituting like this with the approaching type of contrary telescopic 2 set vari-focus lens, if want to become F value for little be the lens combination that becomes clear, the tendency of the big footpathization of lens external diameter that the back organizes is then arranged, and causes the maximization of lens combination.
Thereby, by satisfying above-mentioned conditional (2), (3) or (4), (5), and suitably adjust and constitute the 2nd lens combination G that moves when becoming times 2And the 3rd lens combination G 3The refracting power of each lens distribute, and can reach the brightness of F2.05～2.20 degree, and can construct with the compact of practicality in wide-angle side.
Thereby, satisfy all those conditionals (1), (2) and (3) or (1), (4) and (5), as bright lens combination, be expected to obtain the aberration correction that conforms to its brightness and lens combination these action effects that maximize.
And above-mentioned conditional (6) has been stipulated at the 4th lens combination G 4The negative the strongest lens of refracting power of middle formation (are the 9th lens combination L in each embodiment 9) glass is to the refractive index of d line, and stipulated that being intended to make spherical aberration and chromatic aberation is good scope.That is,, then be difficult to correcting spherical aberration and chromatic aberation if be lower than the lower limit of this conditional (6).
Then, the embodiment to projection type image display apparatus involved in the present invention carries out simple declaration.Figure 49 is the summary pie graph of the related projection type image display apparatus of present embodiment.
As shown in figure 49, light beam by light source 101 ejaculations, by after being intended to make column integration rod 102 perpendicular to the light quantity distribution homogenization of the light beam in the section of optical axis, by means of not shown colour wheel (カ ラ one ホ イ one Le), selected each light that is transformed to 3 primitive color lights (R, G, B) in time series ground, and be irradiated to DMD103.DMD103 herein can switch according to the adjustment that the switching of the look of incident light is carried out using to this coloured light, by DMD103 suitably the projected light after the modulation incide Zoom lens for projection 104 and finally arrive screen 105.
[embodiment]
Below, further specify Zoom lens for projection of the present invention with specific embodiment.
＜embodiment 1 〉
Show that at Fig. 1 the summary of having located the related Zoom lens for projection (wide-angle side) of embodiment 1 constitutes.This Zoom lens for projection is made of following lens successively from the Zoom Side: the 1st lens combination G that promptly has negative refracting power 1, have the 2nd a lens combination G of positive refracting power 2, have the 3rd a lens combination G of positive refracting power 3, and the 4th lens combination G of the refracting power of plus or minus 4, when from the wide-angle side to the telescope end, becoming times, the 2nd lens combination G 2, the 3rd lens combination G 3And the 4th lens combination G 4Move to the Zoom Side, set sealing cover glass (light filter portion) 2 and DMD1 at its back segment.In addition, X represents optical axis among the figure.
Herein, the 1st lens combination G 1Set successively from the Zoom Side: by the 1st lens L that the positive meniscus shaped lens of convex surface towards the Zoom Side formed 1By the 2nd lens L that the negative meniscus lens of convex surface towards the Zoom Side are formed 2And the 3rd lens L 3The 4th lens L that forms by biconvex lens 4And the 5th lens L that forms by biconcave lens 5In addition, the 4th lens L 4And the 5th lens L 5Be adapted to, the face of facing mutually is across the gap and approaching.
Table 1 shows, the center thickness of the radius of curvature R of each lens face of this Zoom lens for projection (mm), each lens and the airspace between each lens (below, general name these be above the axle at interval) the refractive index N of the d line of D (mm), each lens and the value of Abbe number υ.In addition, the numeral in the table for expression from the order of Zoom Side (at following table 3,5,7,9,11,13,15 same).And, at the value of the epimere of table 1 represent that focal distance f is arranged (mm), back focus Bfw (mm), FNo, visual angle 2 ω (degree) (at following table 3,5,7,9,11,13,15 same).
In addition, numerical value in table 1, in 3 numerical value putting down in writing interimly, the value of the numeric representation wide-angle side of left end, the value in numeric representation centre position of central authorities, the value of the numeric representation telescope end of right-hand member (at following table 3,5,7,9,11,13,15 same).
And, above-mentioned the 8th lens L 8Each face (the 15th and the 16th face) be respectively aspheric surface, in table 2,, represent each constant K, the A of above-mentioned aspheric surface formula for these each aspheric surfaces 3～A 20Value.
[table 1]
f＝16.76～21.17～26.72
Bfw＝36.01
FNo＝2.20～2.48～2.81
2ω＝67.2°～55.2°～44.8°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15* 16* 17 18 19 20 21 22 23 24 57.768 279.923 37.258 20.522 86.667 23.161 192.598 -55.214 -54.758 40.714 46.269 -161.878 24.141 -57.971 263.912 18.486 -24.482 1368.571 1886.868 -30.448 209.015 -20.541 ∞ ∞ 5.75 0.50 1.60 5.38 1.40 3.96 3.76 0.20 1.30 20.08～9.77～2.25 3.64 22.29～23.11～22.23 4.16 1.31～2.20～3.53 1.50 2.94 1.20 0.15 3.19 0.33 5.18 33.50～39.18～45.56 3.00 1.51680 1.72916 1.83400 1.84666 1.67790 1.60562 1.67790 1.68893 1.80518 1.56384 1.63930 1.48749 64.2 54.7 37.2 23.8 55.3 43.7 50.7 31.1 25.4 60.7 44.9 70.2
* be aspheric surface
Table 2
The face numbering 15 16
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 0.0000000 -1.0471568×10 -4 -4.3620137×10 -5 -3.5084393×10 -6 -8.9583417×10 -8 7.6117760×10 -9 1.2664597×10 -9 1.2929374×10 -10 1.0846301×10 -11 5.0629956×10 -13 -6.3586240×10 -14 -2.1857224×10 -14 -3.3387951×10 -15 -2.5030973×10 -16 -1.7200227×10 -17 8.8322444×10 -18 2.0826063×10 -21 2.4986267×10 -37 3.9921875×10 -38 0.0000000 -7.5836214×10 -5 5.1552071×10 -6 -2.6776992×10 -6 8.4726801×10 -9 1.2869468×10 -8 1.0715066×10 -9 -1.2245440×10 -11 -1.4783182×10 -11 -2.2041223×10 -12 -1.3456856×10 -13 1.7775463×10 -14 6.7404111×10 -15 4.9499512×10 -16 -1.0245881×10 -16 -9.0115329×10 -19 -8.7157272×10 -33 -7.3577881×10 -38 -1.0839844×10 -38
And, according to the Zoom lens for projection of embodiment 1, shown in table 1 and table 17, satisfy all conditions formula (1)～(3), (6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.805 of glass).
And, the lens motion track when Fig. 2 represents the change times of Zoom lens for projection of embodiment 1.
Further, Figure 11 is the aberration diagram of spherical aberration, astigmatism, distortion and multiplying power chromatic aberation of each wide-angle side, centre position and telescope end of the Zoom lens for projection of expression embodiment 1, and Figure 12,13 and 14 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of wide-angle side, centre position and telescope end.In addition, be shown with aberration for sagittal image surface and tangential image planes (at following Figure 15,19,23,27,37,41,45 identical) at the astigmatism chart.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 1.
And, according to the Zoom lens for projection of embodiment 1, can make that optical property is good, and can will become multiple proportions into more than 1.59 times, and near 1.6 times.And, also can be the wide-angle of 67.2 degree with visual angle 2 ω of wide-angle side.
＜embodiment 2 〉
The summary of the Zoom lens for projection that implementation column 2 is related constitutes and is illustrated in Fig. 3.The lens of the Zoom lens for projection that embodiment 2 is related constitute that roughly the formation in embodiment 1 is identical, omit repeat specification.
With the value representation of the refractive index N of the d line of interval D (mm), each lens above the axle of the radius of curvature R (mm) of each lens face of this Zoom lens for projection, each lens and Abbe number υ at table 3.
And, above-mentioned the 8th lens L 8Each face (the 15th and the 16th face) be respectively aspheric surface, for these each aspheric surfaces, show each constant K, the A of above-mentioned aspheric surface formula at table 4 3～A 20Value.
[table 3]
f＝16.75～21.17～26.72
Bfw＝36.01
FNo＝2.20～2.50～2.85
2ω＝67.0°～55.2°～44.8°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15* 16* 17 18 19 20 21 22 23 24 55.736 295.794 36.714 20.487 96.694 23.019 685.397 -47.457 -43.752 41.087 43.375 -196.323 22.937 -61.417 74.827 18.180 -21.254 100.782 170.615 -25.579 112.014 -21.468 ∞ ∞ 6.03 0.50 1.61 5.48 1.40 4.28 3.68 0.20 1.30 21.14～10.85～3.49 3.69 20.53～21.57～20.31 4.25 1.03～2.08～3.62 1.50 3.09 1.20 0.15 3.49 0.20 5.08 33.50～38.85～44.80 3.00 1.51680 1.77250 1.83400 1.84666 1.56384 1.60342 1.61272 1.68893 1.80518 1.58913 1.62004 1.48749 64.2 49.6 37.2 23.8 60.7 38.0 58.7 31.1 25.4 61.2 36.3 70.2
* be aspheric surface
Table 4
The face numbering 15 16
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 0.0000000 -7.9591626×10 -5 -3.9515490×10 -5 -3.4244703×10 -6 -9.4250262×10 -8 6.1440593×10 -9 1.0645256×10 -9 1.1050783×10 -10 9.7472559×10 -12 5.0631064×10 -13 -5.4447386×10 -14 -2.0833345×10 -14 -3.3494952×10 -15 -2.3822591×10 -16 -2.8085182×10 -17 1.0107697×10 -17 2.0826063×10 -21 2.4986267×10 -37 3.9921875×10 -38 0.0000000 -3.9701683×10 -5 8.4130783×10 -7 -2.6608757×10 -6 2.1560723×10 -8 1.3872093×10 -8 1.0766851×10 -9 -2.5105616×10 -11 -1.7479264×10 -11 -2.5756205×10 -12 -1.7364162×10 -13 1.4328772×10 -14 6.5005510×10 -15 7.8565064×10 -16 -1.1350333×10 -16 -1.1529447×10 -18 -8.7157272×10 -33 -7.3608398×10 -38 -1.0839844×10 -38
And, according to the Zoom lens for projection of embodiment 2, shown in table 3 and table 17, satisfy all conditions formula (1)～(3), (6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.805 of glass).
And, the lens motion track when Fig. 4 represents the change times of Zoom lens for projection of embodiment 2.
Further, Figure 15 is the aberration diagram of spherical aberration, astigmatism, distortion and multiplying power chromatic aberation of each wide-angle side, centre position and telescope end of the Zoom lens for projection of expression embodiment 2, and Figure 16,17 and 18 is respectively the lateral aberration figure with respect to the light of wavelength 546.07nm of wide-angle side, centre position and telescope end.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 2.
And, according to the Zoom lens for projection of embodiment 2, can realize that optical property is good, and can make the change multiple proportions into more than 1.59 times, and near 1.6 times.And, also can be the wide-angle of 67.0 degree with visual angle 2 ω of wide-angle side.
＜embodiment 3 〉
The summary of the Zoom lens for projection that embodiment 3 is related constitutes and is illustrated in Fig. 5.The lens of the Zoom lens for projection that embodiment 3 is related constitute that roughly the formation with embodiment 1 is identical, omit repeat specification.
With the value representation of the refractive index N of the d line of interval D (mm), each lens above the axle of the radius of curvature R (mm) of each lens face of this Zoom lens for projection, each lens and Abbe number υ at table 5.
And, above-mentioned the 8th lens L 8Each face (the 15th and the 16th face) be respectively aspheric surface, represent each constant K, the A of above-mentioned aspheric surface formula for these each aspheric surfaces at table 6 3～A 20Value.
[table 5]
f＝16.75～21.16～26.72
Bfw＝36.01
FNo＝2.20～2.49～2.82
2ω＝67.2°～55.2°～44.8°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15* 16* 17 18 19 20 21 22 23 24 58.242 261.274 37.478 20.346 83.631 23.466 217.203 -53.120 -52.760 43.290 44.643 -117.149 24.256 -56.377 433.084 18.185 -23.848 204.612 376.565 -29.925 244.913 -20.232 ∞ ∞ 5.60 0.50 1.61 5.25 1.40 3.89 3.74 0.22 1.30 20.40～9.91～2.01 3.92 22.19～23.04～22.57 4.16 1.10～1.82～2.93 1.50 3.04 1.20 0.15 3.21 0.53 4.98 33.50～39.30～45.91 3.00 1.51680 1.75500 1.83400 1.84666 1.67790 1.54814 1.72000 1.68893 1.80518 1.58313 1.63930 1.48749 64.2 52.3 37.2 23.8 55.3 45.8 46.0 31.1 25.4 59.4 44.9 70.2
* be aspheric surface
Table 6
The face numbering 15 16
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 0.0000000 -1.2230718×10 -4 -4.2430283×10 -5 -3.4092379×10 -6 -8.6972222×10 -8 7.1484629×10 -9 1.1757361×10 -9 1.1978347×10 -10 1.0324842×10 -11 5.5972680×10 -13 -3.3085418×10 -14 -1.0588648×10 -14 -3.6622081×10 -16 -1.2626284×10 -15 4.4199041×10 -17 8.6699083×10 -18 2.0826063×10 -21 2.4986267×10 -37 3.9921875×10 -38 0.0000000 -8.9500376×10 -5 6.7172376×10 -6 -2.5483986×10 -6 8.7431785×10 -9 1.1929007×10 -8 9.5934489×10 -10 -1.8964460×10 -11 -1.4717821×10 -11 -2.0964357×10 -12 -9.0025225×10 -14 3.7881613×10 -14 1.1691650×10 -14 -1.8769971×10 -15 7.2676141×10 -17 -1.1646457×10 -18 -8.7157272×10 -33 -7.3608398×10 -38 -1.0839844×10 -38
And, according to the Zoom lens for projection of embodiment 3, shown in table 5 and table 17, satisfy all conditions formula (1)～(3), (6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.805 of glass).
And, the lens motion track when Fig. 6 represents the change times of Zoom lens for projection of embodiment 3.
Further, Figure 19 is the aberration diagram of spherical aberration, astigmatism, distortion and multiplying power chromatic aberation of each wide-angle side, centre position and telescope end of the Zoom lens for projection of expression embodiment 3, and Figure 20,21 and 22 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of each wide-angle side, centre position and telescope end.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 3.
And, according to the Zoom lens for projection of embodiment 3, can make that optical property is good, and can will become multiple proportions into more than 1.59 times, and near 1.6 times.And visual angle 2 ω that also can make wide-angle side are the wide-angle of 67.2 degree.
＜embodiment 4 〉
The summary of the Zoom lens for projection that implementation column 4 is related constitutes and is illustrated in Fig. 7.The lens of the Zoom lens for projection that embodiment 4 is related constitute that roughly the formation in embodiment 1 is identical, omit repeat specification.
With interval D (mm) above the axle of the radius of curvature R (mm) of each lens face of this Zoom lens for projection, each lens, at the value representation of the refractive index N of the d of each lens line and Abbe number υ at table 7.
And, above-mentioned the 8th lens L 8Each face (the 15th and the 16th face) be respectively aspheric surface, in table 8 to representing each constant K, the A of above-mentioned aspheric surface formula with those each aspheric surfaces 3～A 20Value.
[table 7]
f＝16.75～21.16～26.71
Bfw＝36.01
FNo＝2.05～234～2.70
2ω＝87.2°～55.2°～44.8°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15* 16* 17 18 19 20 21 22 23 24 58.624 177.513 39.339 20.648 106.016 23.660 218.629 -51.399 -49.871 39.210 40.892 -210.669 24.060 -54.955 99.557 18.531 -23.519 -455.560 -634.448 -29.491 176.562 -20.847 ∞ ∞ 5.11 0.50 1.62 5.59 1.40 3.99 3.88 0.20 1.30 19.70～9.43～2.42 3.79 21.82～22.84～21.16 4.48 1.49～2.72～4.57 1.50 3.30 1.20 0.15 3.64 0.20 4.96 33.50～39.10～45.03 3.00 1.72916 1.83481 1.83400 1.84666 1.60311 1.58144 1.60311 1.88893 1.80518 1.57250 1.61340 1.48749 54.7 42.7 37.2 23.8 60.7 40.7 60.7 31.1 25.4 57.8 44.3 70.2
* be aspheric surface
Table 8
The face numbering 15 16
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 0.0000000 -1.0353440×10 -4 -4.4919518×10 -5 -3.5496227×10 -6 -1.0131108×10 -7 3.9824904×10 -9 7.2207100×10 -10 8.0720078×10 -11 9.3347595×10 -12 8.8358738×10 -13 3.0502100×10 -14 -8.4958313×10 -15 -2.0064778×10 -15 -1.8249307×10 -16 -2.6186592×10 -17 5.1359000×10 -18 2.0826063×10 -21 2.4986267×10 -37 3.9921875×10 -38 0.0000000 -7.4030668×10 -5 3.7547762×10 -6 -3.1004270×10 -6 -3.2015221×10 -8 1.1760558×10 -8 1.3522870×10 -9 4.3372320×10 -11 -9.1688212×10 -12 -1.9597767×10 -12 -1.6791332×10 -13 7.8446395×10 -15 5.3065610×10 -15 3.7253910×10 -16 -1.0032141×10 -16 2.7317807×10 -18 -8.7157272×10 -33 -7.3577881×10 -38 -1.0839844×10 -38
And, according to the Zoom lens for projection of embodiment 4, shown in table 7 and table 17, satisfy all conditions formula (1)～(3), (6) (at the 4th lens combination G 4In, have the 9th the strongest lens L of negative light amplification rate 9The refractive index Nd9=1.805 of glass).
And, the lens motion track when Fig. 8 represents the change times of Zoom lens for projection of embodiment 4.
Further, Figure 23 is the aberration diagram of spherical aberration, astigmatism, distortion and multiplying power chromatic aberation of each wide-angle side, centre position and telescope end of the Zoom lens for projection of expression embodiment 4, and Figure 24,25 and 26 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of wide-angle side, centre position and telescope end.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 4.
And, according to the Zoom lens for projection of embodiment 4, can make that optical property is good, and can will become multiple proportions into more than 1.59 times, and near 1.6 times.And, also can be the wide-angle of 67.2 degree with visual angle 2 ω of wide-angle side.
＜embodiment 5 〉
The summary of the Zoom lens for projection that implementation column 5 is related constitutes and is illustrated in Fig. 9.The lens of the Zoom lens for projection that embodiment 5 is related constitute that roughly the formation in embodiment 1 is identical, omit repeat specification.In addition, at the 4th lens L 4And the 5th lens L 5Be configured on this point as connecting airtight lens mutually, different with each above-mentioned embodiment.
The refractive index N of the d line of interval D (mm), each lens and the value of Abbe number υ on table 9 shows the axle of radius of curvature R (mm), each lens of each lens face of this Zoom lens for projection.
And, above-mentioned the 8th lens L 8Each face (the 14th and the 15th face) be respectively aspheric surface, show each constant K, the A of above-mentioned aspheric surface formula for these each aspheric surfaces at table 10 3～A 20Value.
[table 9]
f＝16.74～21.15～26.71
Bfw＝36.01
FNo＝2.20～2.51～2.87
2ω＝67.4°～55.4°～44.8°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14* 15* 16 17 18 19 20 21 22 23 58.866 274.485 37.519 19.847 101.573 24.511 457.215 -51.271 34.373 39.077 -248.836 23.651 -60.427 65.936 18.170 -24.625 60.203 74.452 -29.238 114.728 -22.140 ∞ ∞ 5.61 0.50 1.80 5.53 1.60 3.79 4.10 1.50 19.12～9.49～2.91 4.29 20.64～21.20～19.32 4.60 0.97～2.28～4.16 1.50 3.67 1.20 0.15 4.21 0.20 4.90 33.50～39.04～45.00 3.00 1.51680 1.77250 1.83400 1.84666 1.58384 1.60342 1.61272 1.68893 1.80518 1.58913 1.62004 1.48749 64.2 49.6 37.2 23.8 60.7 38.0 58.7 31.1 25.4 61.2 36.3 70.2
* be aspheric surface
Table 10
The face numbering 14 15
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 0.0000000 -7.9630536×10 -5 -5.0537907×10 -5 -5.6355939×10 -6 1.9240832×10 -7 3.2440020×10 -8 4.6700920×10 -10 -1.7691245×10 -10 -1.6510262×10 -11 1.3487547×10 -13 1.7412104×10 -13 1.4403692×10 -14 -1.2397801×10 -15 -4.0123406×10 -16 -7.3365003×10 -17 1.1636279×10 -17 4.8341268×10 -21 2.4986267×10 -37 3.9921875×10 -38 0.0000000 -3.0483514×10 -5 -2.0679181×10 -5 -2.8485128×10 -6 9.5518463×10 -8 2.6186878×10 -8 2.6292330×10 -9 3.3342286×10 -11 -3.5055631×10 -11 -6.7622939×10 -12 -6.3855563×10 -13 7.7904814×10 -16 1.2382758×10 -14 2.1363273×10 -15 -4.3274309×10 -18 -2.3981011×10 -17 -8.7157272×10 -33 -7.3608398×10 -38 -1.0839844×10 -38
And, according to the Zoom lens for projection of embodiment 5, shown in table 9 and table 17, satisfy all conditions formula (1)～(3), (6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.805 of glass).
And, the lens motion track when Figure 10 represents the change times of Zoom lens for projection of embodiment 5.
Further, Figure 27 is the aberration diagram of spherical aberration, astigmatism, distortion and the multiplying power chromatic aberation of each wide-angle side, centre position and the telescope end of the Zoom lens for projection of expression embodiment 5, and Figure 28,29 and 30 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of wide-angle side, centre position and telescope end.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 5.
And, according to the Zoom lens for projection of embodiment 5, can make that optical property is good, and can make the change multiple proportions into more than 1.59 times, and near 1.6 times.And, also can (ω be the wide-angles of 67.4 degree with the visual angle 2 of wide-angle side.
＜embodiment 6 〉
The summary of the Zoom lens for projection that implementation column 6 is related constitutes and is illustrated in Figure 31.The lens of the Zoom lens for projection that embodiment 6 is related constitute that roughly the formation in embodiment 1 is identical, omit repeat specification.In addition, at the 4th lens L 4And the 5th lens L 5Be configured this as connecting airtight lens on the one hand mutually, identical with each above-mentioned embodiment 5.
With interval D (mm) above the axle of the radius of curvature R (mm) of each lens face of this Zoom lens for projection, each lens, at the value representation of the refractive index N of the d of each lens line and Abbe number υ at table 11.
And, above-mentioned the 8th lens L 8Each face (the 14th and the 15th face) be respectively aspheric surface, represent each constant K, the A of above-mentioned aspheric surface formula for these each aspheric surfaces at table 12 3～A 16Value.
[table 11]
f＝16.74～21.15～26.70
Bfw＝36.00
FNo＝2.20～2.40～2.64
2ω＝67.4°～55.3°～44.7°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14* 15* 16 17 18 19 20 21 22 23 58.441 302.267 42.267 20.479 71.660 22.791 306.191 -86.088 38.378 38.287 -198.301 24.943 -59.692 68.066 21.350 -22.796 64.532 89.912 -26.721 170.625 -25.381 ∞ ∞ 5.69 0.50 1.80 5.18 1.60 4.08 3.20 1.50 20.07～10.82～4.70 4.39 19.91～19.49～16.48 4.93 1.02～2.78～5.01 1.20 3.54 1.20 0.20 4.92 0.20 4.75 34.80～39.80～45.31 1.05 1.51680 1.77250 1.77250 1.84666 1.60311 1.60342 1.56384 1.68893 1.84666 1.67790 1.67270 1.50847 64.2 49.6 49.6 23.8 60.7 38.0 60.8 31.1 23.8 55.3 32.2 61.2
* be aspheric surface
Table 12
The face numbering 14 15
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 0.0000000 -7.5609207×10 -5 -7.4010104×10 -5 -1.7573032×10 -6 1.2508684×10 -7 1.3596765×10 -8 3.5007261×10 -10 -5.3632157×10 -11 -9.3218004×10 -12 -8.4612049×10 -13 -3.8671459×10 -14 3.4331259×10 -15 1.2870618×10 -15 2.4291147×10 -16 -2.4917516×10 -17 0.0000000 -8.8458449×10 -5 -3.6003689×10 -5 -1.1497100×10 -6 3.9525513×10 -8 9.2122059×10 -9 7.9745206×10 -10 9.7049638×10 -12 2.4198405×10 -12 -2.1165429×10 -12 3.4360563×10 -14 1.0178094×10 -14 -9.7012640×10 -16 -8.2429488×10 -16 9.8304623×10 -17
And, according to the Zoom lens for projection of embodiment 6, shown in table 11 and table 17, satisfy all conditions formula (1)～(3), (6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.847 of glass).
And, the lens motion track when Figure 32 represents the change times of Zoom lens for projection of embodiment 6.
In addition, Figure 37 is the aberration diagram of spherical aberration, astigmatism, distortion and multiplying power chromatic aberation of each wide-angle side, centre position and telescope end of the Zoom lens for projection of expression embodiment 6, and Figure 38,39 and 40 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of wide-angle side, centre position and telescope end.
Clearly learn from these aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 6.
And, according to the Zoom lens for projection of embodiment 6, can make that optical property is good, and can make the change multiple proportions into more than 1.59 times, and near 1.6 times.And visual angle 2 ω that also can make wide-angle side are the wide-angle of 67.4 degree.
＜embodiment 7 〉
The summary of the Zoom lens for projection that implementation column 7 is related constitutes and is illustrated in Figure 33.The lens of the Zoom lens for projection that embodiment 7 is related constitute that roughly the formation in embodiment 1 is identical, omit repeat specification.In addition, at the 4th lens L 4And the 5th lens L 5Be configured this as connecting airtight lens on the one hand mutually, identical with the above embodiments 5.
With interval D (mm) above the axle of the radius of curvature R (mm) of each lens face of this Zoom lens for projection, each lens, at the value representation of the refractive index N of the d of each lens line and Abbe number υ at table 13.
And, above-mentioned the 8th lens L 8Each face (the 14th and the 15th face) be respectively aspheric surface, those each aspheric surfaces are represented each constant K, the A of above-mentioned aspheric surface formula at table 14 3～A 16Value.
[table 13]
f＝16.73～21.14～26.68
Bfw＝36.00
FNo＝2.20～2.40～2.61
2ω＝67.4°～55.3°～44.7°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14* 15* 16 17 18 19 20 21 22 23 64.818 240.522 42.703 21.051 98.722 24.578 176.551 -55.759 42.887 31.362 -115.417 23.819 -58.841 180.550 21.503 -17.877 161.703 483.023 -22.008 256.392 -21.801 ∞ ∞ 4.97 0.50 1.80 5.50 1.60 3.76 4.13 1.50 22.93～13.24～6.43 5.46 17.32～16.54～13.29 4.62 0.71～2.46～4.98 1.20 3.69 1.20 0.20 3.94 0.20 4.63 34.80～39.58～44.62 1.05 1.62041 1.83481 1.83481 1.84666 1.62041 1.54814 1.48749 1.68893 1.84666 1.72916 1.67270 1.50847 60.3 42.7 42.7 23.8 60.3 45.8 70.4 31.1 23.8 54.7 32.2 61.2
* be aspheric surface
Table 14
The face numbering 14 15
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 0.0000000 -4.4478601×10 -5 -9.7193332×10 -5 -2.6444047×10 -6 3.2732874×10 -7 3.6625704×10 -8 6.0488636×10 -10 -2.9767725×10 -10 -4.9838346×10 -11 -4.2017525×10 -12 -3.8320057×10 -14 5.6929325×10 -14 1.0543505×10 -14 8.3823551×10 -16 -1.7488501×10 -16 0.0000000 -2.1031638×10 -5 -6.4551011×10 -5 1.6273821×10 -6 2.2105015×10 -7 9.9824025×10 -10 -1.1922713×10 -9 -1.2686129×10 -10 4.3099126×10 -12 -6.0208214×10 -13 1.9563944×10 -13 1.1290245×10 -14 -2.9856450×10 -15 -1.1153269×10 -15 1.4061520×10 -16
And, according to the Zoom lens for projection of embodiment 7, shown in table 13 and table 17, satisfy all conditions formula (1), (4)～(6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.847 of glass).
And, the lens motion track when Figure 34 represents the change times of Zoom lens for projection of embodiment 7.
Further, Figure 41 is the aberration diagram of spherical aberration, astigmatism, distortion and multiplying power chromatic aberation of each wide-angle side, centre position and telescope end of the Zoom lens for projection of expression embodiment 7, and Figure 42,43 and 44 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of wide-angle side, centre position and telescope end.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 7.
And, according to the Zoom lens for projection of embodiment 7, can be that optical property is good, and can make the change multiple proportions into more than 1.59 times, and near 1.6 times.And visual angle 2 ω that also can make wide-angle side are the wide-angle of 67.4 degree.
＜embodiment 8 〉
The summary of the Zoom lens for projection that implementation column 8 is related constitutes and is illustrated in Figure 35.The lens of the Zoom lens for projection that embodiment 8 is related constitute that roughly the formation in embodiment 1 is identical, omit repeat specification.In addition, at the 4th lens L 4And the 5th lens L 5On any that is configured as connecting airtight lens, identical mutually with the above embodiments 5.
With interval D (mm) above the axle of the radius of curvature R (mm) of each lens face of this Zoom lens for projection, each lens, at the value representation of the refractive index N of the d of each lens line and Abbe number υ at table 15.
And, above-mentioned the 8th lens L 8Each face (the 14th and the 15th face) be respectively aspheric surface, those each aspheric surfaces are represented each constant K, the A of above-mentioned aspheric surface formula at table 16 3～A 16Value.
[table 15]
f＝16.74～21.14～26.69
Bfw＝36.00
FNo＝2.20～2.39～2.58
2ω＝67.4°～55.3°～44.7°
The face number R D N d v d
1 2 3 4 5 6 7 8 9 10 11 12 13 14* 15* 16 17 18 19 20 21 22 23 64.921 256.841 42.050 21.086 117.771 25.827 140.461 -64.446 40.702 35.137 -129.920 23.528 -60.048 184.920 26.257 -17.089 95.533 227.183 -21.675 176.318 -23.943 ∞ ∞ 5.03 0.50 1.80 5.87 1.60 3.51 4.11 1.50 23.51～13.68～6.68 4.96 17.16～16.61～13.67 4.64 0.80～2.59～5.21 1.20 3.56 1.20 0.30 3.98 0.20 4.41 34.80～39.27～44.00 1.05 1.60311 1.83481 1.83481 1.84666 1.60311 1.60342 1.48749 1.83917 1.84666 1.72916 1.74077 1.50847 60.7 42.7 42.7 23.8 60.7 38.0 70.4 23.9 23.8 54.7 27.8 61.2
* be aspheric surface
Table 16
The face numbering 14 15
K A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 0.0000000 -1.9943892×10 -5 -3.8144002×10 -5 -1.8234915×10 -5 -2.1305587×10 -8 1.1487881×10 -9 -1.6920903×10 -10 -4.8165032×10 -11 -5.1816257×10 -12 -3.0797936×10 -13 1.8801406×10 -14 1.0006390×10 -14 2.0153834×10 -15 2.6706225×10 -16 -4.7362956×10 -17 0.0000000 -1.3965449×10 -5 -4.5492455×10 -6 -1.4154593×10 -6 -2.9027385×10 -8 5.4311769×10 -10 -3.0436811×10 -10 -1.0610299×10 -10 -5.0616268×10 -12 -1.8329067×10 -12 2.1749923×10 -13 4.3584562×10 -14 2.6559734×10 -15 -7.3158926×10 -16 1.4764410×10 -17
And, according to the Zoom lens for projection of embodiment 8, shown in table 15 and table 17, satisfy all conditions formula (1), (4)～(6) (at the 4th lens combination G 4In, negative the 9th the strongest lens L of light amplification rate 9The refractive index Nd9=1.847 of glass).
And, the lens motion track when Figure 36 represents the change times of Zoom lens for projection of embodiment 8.
Further, Figure 45 is the aberration diagram of spherical aberration, astigmatism, distortion and the multiplying power chromatic aberation of each wide-angle side, centre position and the telescope end of the Zoom lens for projection of expression embodiment 8, and Figure 46,47 and 48 is respectively the lateral aberration figure for the light of the wavelength 546.07nm of wide-angle side, centre position and telescope end.
Clearly learn from those aberration diagrams,, can proofread and correct each aberration extremely well according to the Zoom lens for projection of embodiment 8.
And, according to the Zoom lens for projection of embodiment 8, can make optical property good, and can make the change multiple proportions into more than 1.59 times, and near 1.6 times.And visual angle 2 ω that also can make wide-angle side are the wide-angle of 67.4 degree.
[table 17]
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6 Embodiment 7 Embodiment 8
fw ft Bfw frw frt frw/frt M1 M2 M3 M4 f1 f2 f3 f4 16.76 26.72 36.01 36.26 36.48 0.99 3.53 -14.13 -14.39 -12.07 -22.38 59.49 25.55 454.34 16.75 26.72 36.01 35.74 36.12 0.99 3.98 -13.67 -13.89 -11.30 -22.80 58.85 27.68 253.15 16.75 26.72 36.01 36.38 36.62 0.99 4.03 -14.57 -14.14 -12.31 -22.46 59.18 23.95 -41810.14 16.75 26.71 36.01 36.88 37.27 0.99 3.33 -13.95 -14.61 -11.53 -22.14 58.88 28.24 195.31 16.74 26.71 36.01 36.65 36.69 1.00 2.83 -13.38 -14.70 -11.50 -21.37 55.94 28.22 183.41 16.74 26.70 36.00 37.02 36.39 1.02 4.29 -11.08 -14.50 -10.51 -21.66 53.26 31.76 117.67 16.73 26.68 36.00 37.57 36.64 1.03 6.43 -10.07 -14.10 -9.82 -22.37 45.38 35.32 104.94 16.74 26.69 36.00 37.16 36.82 1.01 8.71 -10.13 -13.61 -9.20 -23.01 46.10 35.21 101.51
M1/f1 M2/f2 M3/f3 M4/f4 -0.16 -0.24 -0.56 -0.03 -0.17 -0.23 -0.50 -0.04 -0.18 -0.25 -0.59 0.00 -0.15 -0.24 -0.52 -0.06 -0.13 -0.24 -0.52 -0.06 -0.20 -0.21 -0.46 -0.09 -0.29 -0.22 -0.40 -0.09 -0.29 -0.22 -0.39 -0.09
The amount of movement of group with the optical axis direction reduced side for just.

Claims (7)

1. a Zoom lens for projection is characterized in that,
Constitute by following lens successively from the Zoom Side: the 4th lens combination of the 3rd lens combination of the 2nd lens combination of the 1st lens combination of negative refracting power, positive refracting power, positive refracting power, the refracting power of plus or minus, when from the wide-angle side to the telescope end, becoming times, above-mentioned the 2nd lens combination, above-mentioned the 3rd lens combination and above-mentioned the 4th lens combination move to the Zoom Side, and satisfy following conditional (1):
0.95＜frw/frt＜1.05 (1)
Herein,
Frw: the synthetic focal length of the wide-angle side of above-mentioned the 2nd, the 3rd and the 4th lens combination,
Frt: the synthetic focal length of the telescope end of above-mentioned the 2nd, the 3rd and the 4th lens combination.
2. Zoom lens for projection according to claim 1 is characterized in that,
Satisfy following conditional (2), (3):
|M4/f4|＜|M1/f1|＜|M2/f2|＜|M3/f3| (2)
0.4＜|M3/f3|＜0.8 (3)
Wherein,
Mn: the wide-angle side position of n lens combination and the displacement of telescope end position,
Fn: the focal length of n lens combination.
3. Zoom lens for projection according to claim 1 is characterized in that,
Satisfy following conditional (4), (5):
|M4/f4|＜|M2/f2|＜|M1/f1|＜|M3/f3| (4)
0.2＜|M3/f3|＜0.6 (5)
Wherein,
Mn: the wide-angle side position of n lens combination and the displacement of telescope end position,
Fn: the focal length of n lens combination.
4. according to each described Zoom lens for projection in the claim 1～3, it is characterized in that,
The optical material of the lens that the refracting power that the formation in above-mentioned the 4th lens combination is born is the strongest satisfies following conditional (6) to the refractive index Nd of d line:
Nd＞1.75 (6)。
5. according to each described Zoom lens for projection in the claim 1～4, it is characterized in that,
The most close reduced side in above-mentioned the 4th lens combination is disposed the positive lens of convex surface towards reduced side.
6. according to each described Zoom lens for projection in the claim 1～5, it is characterized in that,
In above-mentioned the 4th lens combination, dispose 1 non-spherical lens and be configured.
7. a projection type image display apparatus is characterized in that,
Possess: light source, light valve, will be from this light source and each described Zoom lens for projection the illumination light department of the Chinese Academy of Sciences of this light valve of beam direction that comes and the claim 1～6,
With above-mentioned light valve the light beam that comes from above-mentioned light source is carried out optical modulation, and project screen by means of above-mentioned Zoom lens for projection.
CN200710199485A 2006-12-21 2007-12-13 Zoom lens for projection and projection display device Expired - Fee Related CN100582859C (en)

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CN114518645A (en) * 2022-03-07 2022-05-20 深圳福特科光电有限公司 Optical lens

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