CN104142565A - Near-infrared interactive projection lens - Google Patents
Near-infrared interactive projection lens Download PDFInfo
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- CN104142565A CN104142565A CN201410349750.XA CN201410349750A CN104142565A CN 104142565 A CN104142565 A CN 104142565A CN 201410349750 A CN201410349750 A CN 201410349750A CN 104142565 A CN104142565 A CN 104142565A
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- source side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
Abstract
The invention provides a near-infrared interactive projection lens. The near-infrared interactive projection lens sequentially comprises a first lens body, a reflective optical surface, a second lens body, a third lens body and a fourth lens body from the imaging side to the image source side, wherein the first lens body has negative focal power, the imaging side of the first lens body is a convex surface, and the image source side of the first lens body is a concave surface; the reflective optical surface enables an optical path to be bent; the second lens body has positive focal power, and the image source side of the second lens body is a convex surface; the third lens body has positive focal power, the imaging side of the third lens body is a convex surface, and the image source side of the third lens body is a concave surface; the fourth lens body has positive focal power. The lens satisfies the relational expression that ImgH/D is larger than 0.25 and smaller than 0.55, wherein ImgH is one half of the length of the diameter diagonal line of an image source; D is the perpendicular height of a part from the imaging side of the first lens body to the central optical axis perpendicular to the image source. By the adoption of the four lens bodies, the near-infrared interactive projection lens has the advantages of being large in field angle and aperture, small in size and the like; meanwhile, glass and plastic are mixed, different types of focal power and different curvature radiuses are distributed reasonably, therefore, the cost of the lens is reduced, influences caused by thermal differences on a system are avoided effectively, and the image-space telecentric characteristic is achieved.
Description
Technical field
The present invention relates to a kind of optical projection system being formed by four lens, especially relate to a kind of projection lens that can be applicable near infrared interactive system.
Background technology
In recent years, along with the continuous progress of science and technology, drive the progressively rise of interactive device, the range of application of projection lens is also more and more wider.In order to be applicable to miniaturization electronic equipment and interactively demand, projection lens need to have enough field angle when guaranteeing miniaturization, obtains larger picture, and guarantee obtaining of good image quality and information with the occasion narrower and small.Traditional projection lens is generally used for imaging, by adopting more eyeglass to eliminate various aberrations to improve resolution, but can make projection lens total length elongated, is unfavorable for miniaturization; And general large field angle projection lens, distortion all can be larger, and image quality is poor.If the patent No. is the patent of invention of " CN102879888A ", this projection lens sequentially has seven eyeglasses and a total reflection prism, eyeglass number and the prism location of this camera lens, determined that this Lens cannot further dwindle, although there is good image quality, but this structure cannot guarantee the heart characteristic far away of lens combination, thereby make that light is inhomogeneous may occur shade.
Interactive device mainly relies on through camera lens projection and produces signal, then catches image through imaging lens, further by image processing software, information is extracted, thereby is realized the interactive functions such as multi-point touch, gesture identification.Therefore, the signal quality of projection lens simulation has conclusive effect to the precision of information extraction.Infrared band is because of the characteristic of himself, and impact that can elimination visible ray, more easily realizes the extraction of information.
Therefore, the present invention proposes a kind of projection lens that is applied to near-infrared band, has the characteristic of large field angle, large aperture and miniaturization, and effectively eliminates the poor impact on lens system of heat, reaches the effect of the image space heart far away simultaneously.
Summary of the invention
In view of the above problems, the invention provides a kind of near infrared interactive projection camera lens with large field angle, large aperture, miniaturization, by adopting glass and plastics to mix the design of using, reasonable control to one-piece construction and each lens shape, reduced production cost, effectively eliminate the impact of hot difference on camera lens, reached the effect of the image space heart far away.
A near infrared interactive projection camera lens, sequentially comprises from imaging side to image source side:
The first lens of tool negative power, its imaging side is convex surface, image source side is concave surface;
Make the catoptrics face of light path bending;
The second lens of tool positive light coke, its image source side is convex surface;
The 3rd lens of tool positive light coke, its imaging side is convex surface, image source side is concave surface;
The 4th lens of tool positive light coke;
In near infrared interactive projection camera lens provided by the invention, between first lens and the second lens, be provided with a diaphragm, and the second lens and the 4th lens are made by glass, in this plastic lens, insert the method for glass mirror, coordinate again appropriate structural design, can effectively eliminate the poor impact on this camera lens of heat.
In near infrared interactive projection camera lens provided by the invention, ImgH is half of image source diameter diagonal line length; D is first lens imaging side to the vertical height of the central optical axis perpendicular to image source, will meet following relationship:
0.25<ImgH/D<0.55
Meet above relational expression and can allow the present invention realize the characteristic of miniaturization, to be applied on portable product.
In near infrared interactive projection camera lens provided by the invention, the focal length that f1 is first lens, the whole focal length that f is lens system, meets following relationship:
-3<f1/f<-1
First lens meets above formula requirement, guarantees wide-angle feature of the present invention.
In near infrared interactive projection camera lens provided by the invention, f2 is the focal length of the second lens, and the whole focal length that f is lens system, meets following relationship:
2<f2/f<4
The second lens are glass lens, and above formula requirement in addition can be good at eliminating the poor impact on this lens system of heat, obtains more reliable, stable image quality.
In near infrared interactive projection camera lens provided by the invention, f4 is the focal length of the 4th lens, the whole focal length that f is described lens system, and R5, R6 are respectively the radius-of-curvature of the 3rd lens imaging side and image source side, will meet following relationship:
3<f4/f<12
-22<(R5+R6)/(R5-R6)<-5
The 3rd lens and the 4th lens meet above requirement, can realize image space of the present invention heart characteristic far away, allow light keep evenly, without dark angle, and revise preferably distortion.
Preferably, described the second lens imaging side is convex surface.
Preferably, described the 4th lens imaging side is convex surface, and image source side is convex surface.
Preferably, described in to make the catoptrics face of light path bending can be reflecting prism, can be also plane of reflection mirror.
The present invention has adopted four lens, realize the technique effect of large field angle, large aperture, miniaturization, by combining and different focal power and the distribution of radius-of-curvature of plastic and glass, reduced production cost, eliminate the impact of hot difference on system, reached the characteristic of the image space heart far away simultaneously.
Accompanying drawing explanation
Fig. 1 is the primary structure schematic diagram of the embodiment 1 of near infrared interactive projection camera lens provided by the invention;
Fig. 2 is chromaticity difference diagram on the axle in embodiment 1 (mm);
Fig. 3 is the astigmatism figure (mm) in embodiment 1;
Fig. 4 is the distortion figure (%) in embodiment 1;
Fig. 5 is the ratio chromatism, figure (μ m) in embodiment 1;
Fig. 6 is the primary structure schematic diagram of the embodiment 2 of near infrared interactive projection camera lens provided by the invention;
Fig. 7 is chromaticity difference diagram on the axle in embodiment 2 (mm);
Fig. 8 is the astigmatism figure (mm) in embodiment 2;
Fig. 9 is the distortion figure (%) in embodiment 2;
Figure 10 is the ratio chromatism, figure (μ m) in embodiment 2;
Figure 11 is the primary structure schematic diagram of the embodiment 3 of near infrared interactive projection camera lens provided by the invention;
Figure 12 is chromaticity difference diagram on the axle in embodiment 3 (mm);
Figure 13 is the astigmatism figure (mm) in embodiment 3;
Figure 14 is the distortion figure (%) in embodiment 3;
Figure 15 is the ratio chromatism, figure (μ m) in embodiment 3;
Figure 16 is the primary structure schematic diagram of the embodiment 4 of near infrared interactive projection camera lens provided by the invention;
Figure 17 is chromaticity difference diagram on the axle in embodiment 4 (mm);
Figure 18 is the astigmatism figure (mm) in embodiment 4;
Figure 19 is the distortion figure (%) in embodiment 4;
Figure 20 is the ratio chromatism, figure (μ m) in embodiment 4;
Figure 21 is the primary structure schematic diagram of the embodiment 5 of near infrared interactive projection camera lens provided by the invention;
Figure 22 is chromaticity difference diagram on the axle in embodiment 5 (mm);
Figure 23 is the astigmatism figure (mm) in embodiment 5;
Figure 24 is the distortion figure (%) in embodiment 5;
Figure 25 is the ratio chromatism, figure (μ m) in embodiment 5.
Figure 26 is the primary structure schematic diagram of the embodiment 6 of near infrared interactive projection camera lens provided by the invention;
Figure 27 is chromaticity difference diagram on the axle in embodiment 6 (mm);
Figure 28 is the astigmatism figure (mm) in embodiment 6;
Figure 29 is the distortion figure (%) in embodiment 6;
Figure 30 is the ratio chromatism, figure (μ m) in embodiment 6.
Figure 31 is the primary structure schematic diagram of the embodiment 7 of near infrared interactive projection camera lens provided by the invention;
Figure 32 is chromaticity difference diagram on the axle in embodiment 7 (mm);
Figure 33 is the astigmatism figure (mm) in embodiment 7;
Figure 34 is the distortion figure (%) in embodiment 7;
Figure 35 is the ratio chromatism, figure (μ m) in embodiment 7;
Figure 36 is the primary structure schematic diagram of the embodiment 8 of near infrared interactive projection camera lens provided by the invention;
Figure 37 is chromaticity difference diagram on the axle in embodiment 8 (mm);
Figure 38 is the astigmatism figure (mm) in embodiment 8;
Figure 39 is the distortion figure (%) in embodiment 8;
Figure 40 is the ratio chromatism, figure (μ m) in embodiment 8;
Embodiment
With reference to the accompanying drawings foregoing invention content is specifically described:
As shown in Figure 1, in embodiment 1, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 1, each parameter is as described below: TTL=11.51; F1=-2.99; F2=4.14; F3=17.65; F4=6.47; F=1.56
ImgH/D＝0.53；
f1/f＝-1.92；
f2/f＝2.66；
f4/f＝4.15；
(R5+R6)/(R5-R6)＝-21.59
Systematic parameter: stop value 2.8
Table 1
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0000 | ? | 414.6592 | ? |
| 1 | Aspheric surface | 4.4952 | 0.3487 | F52R | 1.6934 | 3.4407 |
| 2 | Aspheric surface | 1.1364 | 0.8515 | ? | 1.2072 | -0.8550 |
| 3 | Sphere | Infinite | 2.5000 | BK7 | 1.1719 | ? |
| 4 | Sphere | Infinite | 0.1000 | ? | 0.5849 | ? |
| stop | Sphere | Infinite | 1.2492 | ? | 0.5132 | ? |
| 6 | Sphere | 13.9318 | 1.5994 | H-ZK11 | 2.0000 | ? |
| 7 | Sphere | -3.0606 | 0.0497 | ? | 2.0000 | ? |
| 8 | Aspheric surface | 2.1970 | 1.0309 | F52R | 1.7022 | -0.0806 |
| 9 | Aspheric surface | 2.4105 | 1.0575 | ? | 1.4583 | -0.6120 |
| 10 | Sphere | 6.7171 | 1.3752 | BK7 | 2.0000 | ? |
| 11 | Sphere | -6.0355 | 1.3493 | ? | 2.0000 | ? |
| IMG | Sphere | Infinite | ? | ? | 1.3018 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 2
As shown in Figure 6, in embodiment 2, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is concave surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 2, each parameter is as described below: TTL=11.28; F1=-2.71; F2=4.4; F3=13.7; F4=5.3; F=1.47
ImgH/D＝0.44；
f1/f＝-1.85；
f2/f＝3.0；
f4/f＝3.61；
(R5+R6)/(R5-R6)＝-12.6
Systematic parameter: stop value 2.8
Table 3
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0000 | ? | 414.7343 | ? |
| 1 | Aspheric surface | 4.7321 | 0.4966 | F52R | 1.7351 | 3.6498 |
| 2 | Aspheric surface | 1.0587 | 0.8601 | ? | 1.1493 | -0.6885 |
| 3 | Sphere | Infinite | 2.6515 | BK7 | 1.1226 | ? |
| 4 | Sphere | Infinite | 0.0997 | ? | 0.5815 | ? |
| stop | Sphere | Infinite | 0.8263 | ? | 0.5149 | ? |
| 6 | Sphere | -100.0015 | 1.3349 | H-ZK11 | 2.0000 | ? |
| 7 | Sphere | -2.7077 | 0.0544 | ? | 2.0000 | ? |
| 8 | Aspheric surface | 2.1045 | 1.0310 | F52R | 1.4804 | -0.1226 |
| 9 | Aspheric surface | 2.4674 | 1.0119 | ? | 1.3087 | -1.1281 |
| 10 | Sphere | 5.7617 | 1.4809 | BK7 | 2.0000 | ? |
| 11 | Sphere | -4.6472 | 1.4348 | ? | 2.0000 | ? |
| IMG | Sphere | Infinite | ? | ? | 1.1923 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 4
As shown in figure 11, in embodiment 3, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is concave surface, image source side is convex surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 3, each parameter is as described below: TTL=11.75; F1=-3.01; F2=4.08; F3=16.01; F4=7.32; F=1.63
ImgH/D＝0.48；
f1/f＝-1.84；
f2/f＝2.5；
f4/f＝4.48；
(R5+R6)/(R5-R6)＝-17.55
Systematic parameter: stop value 2.8
Table 5
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0000 | ? | 414.7388 | ? |
| 1 | Aspheric surface | 4.4911 | 0.3348 | F52R | 1.7546 | 3.3494 |
| 2 | Aspheric surface | 1.1416 | 1.0011 | ? | 1.2478 | -0.8161 |
| 3 | Sphere | Infinite | 2.7720 | BK7 | 1.1957 | ? |
| 4 | Sphere | Infinite | 0.1252 | ? | 0.6447 | ? |
| stop | Sphere | Infinite | 1.1869 | ? | 0.5711 | ? |
| 6 | Sphere | 12.1532 | 1.3018 | H-ZK11 | 2.0000 | ? |
| 7 | Sphere | -3.1215 | 0.0237 | ? | 2.0000 | ? |
| 8 | Aspheric surface | 2.1605 | 1.0396 | F52R | 1.5955 | -0.1075 |
| 9 | Aspheric surface | 2.4215 | 1.1146 | ? | 1.3696 | -0.5974 |
| 10 | Sphere | -50.1328 | 1.4393 | BK7 | 2.0000 | ? |
| 11 | Sphere | -3.5075 | 1.4098 | ? | 2.0000 | ? |
| IMG | Sphere | Infinite | ? | ? | 1.3062 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 6
As shown in figure 16, in embodiment 4, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E3 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 4, each parameter is as described below: TTL=11.59; F1=-3.05; F2=4.12; F3=15.47; F4=17.01; F=1.51
ImgH/D＝0.47；
f1/f＝-2.02；
f2/f＝2.73；
f4/f＝11.26；
(R5+R6)/(R5-R6)＝-14.96
Systematic parameter: stop value 2.8
Table 7
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0000 | ? | 414.7251 | ? |
| 1 | Aspheric surface | 4.4350 | 0.3573 | F52R | 1.6956 | 3.4574 |
| 2 | Aspheric surface | 1.1462 | 0.9313 | ? | 1.2275 | -0.8741 |
| 3 | Sphere | Infinite | 2.5366 | BK7 | 1.1692 | ? |
| 4 | Sphere | Infinite | 0.1817 | ? | 0.6072 | ? |
| stop | Sphere | Infinite | 1.4606 | ? | 0.5095 | ? |
| 6 | Sphere | 9.0228 | 1.7150 | H-ZK11 | 2.0000 | ? |
| 7 | Sphere | -3.3686 | 0.0497 | ? | 2.0000 | ? |
| 8 | Aspheric surface | 2.1832 | 1.0300 | F52R | 1.7407 | -0.0726 |
| 9 | Aspheric surface | 2.4960 | 0.7739 | ? | 1.4930 | -0.6516 |
| 10 | Sphere | 3.0696 | 1.2827 | BK7 | 2.0000 | ? |
| 11 | Sphere | 4.0813 | 1.2682 | ? | 2.0000 | ? |
| IMG | Sphere | Infinite | ? | ? | 1.2083 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 8
As shown in figure 21, in embodiment 5, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is concave surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is concave surface, image source side is convex surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 5, each parameter is as described below: TTL=12.02; F1=-2.89; F2=4.36; F3=12.24; F4=8.28; F=1.6
ImgH/D＝0.46；
f1/f＝-1.81；
f2/f＝2.72；
f4/f＝5.17；
(R5+R6)/(R5-R6)＝-9.9
Systematic parameter: stop value 2.8
Table 9
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0000 | ? | 414.8015 | ? |
| 1 | Aspheric surface | 4.7095 | 0.4765 | F52R | 1.7911 | 3.5909 |
| 2 | Aspheric surface | 1.1118 | 0.9038 | ? | 1.2194 | -0.7191 |
| 3 | Sphere | Infinite | 2.7789 | BK7 | 1.1939 | ? |
| 4 | Sphere | Infinite | 0.1444 | ? | 0.6414 | ? |
| stop | Sphere | Infinite | 0.9488 | ? | 0.5619 | ? |
| 6 | Sphere | -100.0016 | 1.6068 | H-ZK11 | 2.0000 | ? |
| 7 | Sphere | -2.6862 | 0.0544 | ? | 2.0000 | ? |
| 8 | Aspheric surface | 2.0930 | 1.0463 | F52R | 1.6320 | -0.1182 |
| 9 | Aspheric surface | 2.5633 | 1.0720 | ? | 1.4180 | -1.1893 |
| 10 | Sphere | -998.3688 | 1.5278 | BK7 | 2.0000 | ? |
| 11 | Sphere | -4.2071 | 1.4648 | ? | 2.0000 | ? |
| IMG | Sphere | Infinite | ? | ? | 1.2894 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 10
As shown in figure 26, in embodiment 6, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is concave surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 6, each parameter is as described below: TTL=10.36; F1=-2.72; F2=4.06; F3=9.08; F4=8.52; F=1.19
ImgH/D＝0.47；
f1/f＝-2.3；
f2/f＝3.42；
f4/f＝7.19；
(R5+R6)/(R5-R6)＝-5.2
Systematic parameter: stop value 2.8
Table 11
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0015 | ? | 414.5714 | ? |
| 1 | Aspheric surface | 4.7491 | 0.4241 | F52R | 1.5610 | 3.7756 |
| 2 | Aspheric surface | 1.0726 | 0.6477 | ? | 1.0573 | -0.7280 |
| 3 | Sphere | Infinite | 1.9370 | BK7 | 1.0413 | ? |
| 4 | Sphere | Infinite | 0.3056 | ? | 0.5384 | ? |
| stop | Sphere | Infinite | 1.0090 | ? | 0.3807 | ? |
| 6 | Sphere | -97.7371 | 2.1397 | H-ZK11 | 2.0011 | ? |
| 7 | Sphere | -2.5105 | 0.0561 | ? | 2.0011 | ? |
| 8 | Aspheric surface | 2.1049 | 1.0358 | F52R | 1.6404 | -0.1043 |
| 9 | Aspheric surface | 3.1067 | 0.4351 | ? | 1.4054 | -1.4966 |
| 10 | Sphere | 2.9638 | 1.2340 | BK7 | 2.0011 | ? |
| 11 | Sphere | 8.0044 | 1.1642 | ? | 2.0011 | ? |
| IMG | Sphere | Infinite | ? | ? | 0.9730 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 12
As shown in figure 31, in embodiment 7, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the reflecting prism E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 7, each parameter is as described below: TTL=12.01; F1=-2.54; F2=4.02; F3=10.66; F4=9.0; F=1.06
ImgH/D＝0.29；
f1/f＝-2.4；
f2/f＝3.80；
f4/f＝8.5；
(R5+R6)/(R5-R6)＝-7.66
Systematic parameter: stop value 2.8
Table 13
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 466.9994 | ? | 414.7163 | ? |
| 1 | Aspheric surface | 5.3676 | 0.3681 | F52R | 1.6887 | 2.9912 |
| 2 | Aspheric surface | 1.0514 | 1.2586 | ? | 1.2203 | -0.8884 |
| 3 | Sphere | Infinite | 2.5014 | BK7 | 1.0634 | ? |
| 4 | Sphere | Infinite | 0.4027 | ? | 0.5802 | ? |
| stop | Sphere | Infinite | 1.4842 | ? | 0.4327 | ? |
| 6 | Sphere | 11.1729 | 2.0165 | H-ZK11 | 2.0011 | ? |
| 7 | Sphere | -3.0437 | 0.0546 | ? | 2.0011 | ? |
| 8 | Aspheric surface | 2.0424 | 1.0062 | F52R | 1.5247 | -0.2037 |
| 9 | Aspheric surface | 2.6554 | 0.6359 | ? | 1.3356 | -1.5667 |
| 10 | Sphere | 7.5580 | 1.0437 | BK7 | 2.0011 | ? |
| 11 | Sphere | -11.1347 | 1.2715 | ? | 2.0011 | ? |
| IMG | Sphere | Infinite | ? | ? | 0.8571 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 14
as shown in figure 36, in embodiment 8, this near infrared interactive projection camera lens is sequentially comprised by imaging side to image source side: the first lens E1 of tool negative power, and its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; Make the plane of reflection mirror E2 of light path bending; The second lens E3 of tool positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; The 3rd lens E4 of tool positive light coke, its imaging side is convex surface, image source side is concave surface, and imaging side and image source side are aspheric surface; The 4th lens E5 with positive light coke, its imaging side is convex surface, image source side is convex surface, and imaging side and image source side are sphere; Diaphragm is between first lens E1 and the second lens E3; In described projection lens system, the second lens E3 and the 4th lens E5 are made by glass.
From imaging side to image source side, the two sides of first lens E1 is S1, S2, and diaphragm face is S3, and the two sides of the second lens E3 is S4, S5, and the two sides of the 3rd lens E4 is S6, S7, and the two sides of the 4th lens E5 is S8, S9, and image source is S10.
In embodiment 8, each parameter is as described below: TTL=7.74; F1=-2.89; F2=3.97; F3=19.69; F4=6.34; F=1.66
ImgH/D＝0.45；
f1/f＝-1.74；
f2/f＝2.39；
f4/f＝3.82；
(R5+R6)/(R5-R6)＝-15.83
Systematic parameter: stop value 2.8
Table 15
| Surface number | Surface type | Radius-of-curvature | Thickness | Material | Effective aperture | Circular cone coefficient |
| obj | Sphere | Infinite | 467.0000 | ? | 358.3602 | ? |
| 1 | Aspheric surface | 6.1068 | 0.4173 | F52R | 1.8064 | 6.9581 |
| 2 | Aspheric surface | 1.1911 | 2.2937 | ? | 1.2498 | -0.5322 |
| 3 | Coordinate breakpoint | ? | 0.0000 | - | 0.0000 | ? |
| 4 | Sphere | Infinite | 0.0000 | MIRROR | 1.2283 | ? |
| 5 | Coordinate breakpoint | ? | -1.2938 | - | 0.0000 | ? |
| stop | Sphere | Infinite | -0.5169 | ? | 0.6567 | ? |
| 7 | Sphere | -10.7516 | -0.3820 | H-ZK11 | 0.9442 | ? |
| 8 | Sphere | 3.2030 | -0.8897 | ? | 0.9886 | ? |
| 9 | Aspheric surface | -2.4523 | -0.9470 | F52R | 1.2166 | -0.3151 |
| 10 | Aspheric surface | -2.7829 | -0.9906 | ? | 1.1600 | -3.2247 |
| 11 | Sphere | -5.0984 | -1.3600 | BK7 | 1.3119 | ? |
| 12 | Sphere | 8.0502 | -1.3639 | ? | 1.3371 | ? |
| IMG | Sphere | Infinite | ? | ? | 1.2346 | ? |
Following table is aspheric surface high-order term coefficient A4, A6, A8, A10, the A12 of non-spherical lens:
Table 16
Fig. 2 is chromaticity difference diagram (mm) on the axle of embodiment 1, and Fig. 3 is the astigmatism figure (mm) of embodiment 1, and Fig. 4 is the distortion figure (%) of embodiment 1, and Fig. 5 is the ratio chromatism, figure (μ m) of embodiment 1.
Fig. 7 is chromaticity difference diagram (mm) on the axle of embodiment 2, and Fig. 8 is the astigmatism figure (mm) of embodiment 2, and Fig. 9 is the distortion figure (%) of embodiment 2, and Figure 10 is the ratio chromatism, figure (μ m) of embodiment 2.
Figure 12 is chromaticity difference diagram (mm) on the axle of embodiment 3, and Figure 13 is the astigmatism figure (mm) of embodiment 3, and Figure 14 is the distortion figure (%) of embodiment 3, and Figure 15 is the ratio chromatism, figure (μ m) of embodiment 3.
Figure 17 is chromaticity difference diagram (mm) on the axle of embodiment 4, and Figure 18 is the astigmatism figure (mm) of embodiment 4, and Figure 19 is the distortion figure (%) of embodiment 4, and Figure 20 is the ratio chromatism, figure (μ m) of embodiment 4.
Figure 22 is chromaticity difference diagram (mm) on the axle of embodiment 5, and Figure 23 is the astigmatism figure (mm) of embodiment 5, and Figure 24 is the distortion figure (%) of embodiment 5, and Figure 25 is the ratio chromatism, figure (μ m) of embodiment 5.
Figure 27 is chromaticity difference diagram (mm) on the axle of embodiment 6, and Figure 28 is the astigmatism figure (mm) of embodiment 6, and Figure 29 is the distortion figure (%) of embodiment 6, and Figure 30 is the ratio chromatism, figure (μ m) of embodiment 6.
Figure 32 is chromaticity difference diagram (mm) on the axle of embodiment 7, and Figure 33 is the astigmatism figure (mm) of embodiment 7, and Figure 34 is the distortion figure (%) of embodiment 7, and Figure 35 is the ratio chromatism, figure (μ m) of embodiment 7.
Figure 37 is chromaticity difference diagram (mm) on the axle of embodiment 8, and Figure 38 is the astigmatism figure (mm) of embodiment 8, and Figure 39 is the distortion figure (%) of embodiment 8, and Figure 40 is the ratio chromatism, figure (μ m) of embodiment 8.
By chromaticity difference diagram, astigmatism figure, distortion figure and ratio chromatism, figure on the axle of each embodiment, can find out that the present invention has good optical property.
Although described principle of the present invention and embodiment near infrared interactive projection camera lens above; but under above-mentioned instruction of the present invention; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion all drop in protection scope of the present invention.It will be understood by those skilled in the art that specific descriptions are above in order to explain object of the present invention, and not for limiting the present invention, protection scope of the present invention is limited by claim and equivalent thereof.
Claims (9)
1. a near infrared interactive projection camera lens, is characterized in that: from imaging side to image source side, sequentially comprise:
The first lens of tool negative power, its imaging side is convex surface, image source side is concave surface;
Make the catoptrics face of light path bending;
The second lens of tool positive light coke, its image source side is convex surface;
The 3rd lens of tool positive light coke, its imaging side is convex surface, image source side is concave surface;
The 4th lens of tool positive light coke;
Diaphragm is placed between first lens and the second lens, and described camera lens meets following relationship: 0.25<ImgH/D<0.55
Wherein, ImgH is half of image source diameter diagonal line length; D is that first lens imaging side is to the vertical height of the central optical axis perpendicular to image source.
2. near infrared interactive projection camera lens according to claim 1, is characterized in that: in described camera lens, the second lens and the 4th lens are made by glass material.
3. near infrared interactive projection camera lens according to claim 2, is characterized in that: described camera lens meets following relationship:
-3<f1/f<-1；
Wherein, the focal length that f1 is first lens, the whole focal length that f is lens system.
4. near infrared interactive projection camera lens according to claim 3, is characterized in that: described camera lens meets following relationship: 2<f2/f<4
Wherein, f2 is the focal length of the second lens, the whole focal length that f is lens system.
5. near infrared interactive projection camera lens according to claim 4, is characterized in that: described camera lens meets following relationship:
3<f4/f<12；
-22<(R5+R6)/(R5-R6)<-5
Wherein, f4 is the focal length of the 4th lens, the whole focal length that f is described lens system, and R5 is the radius-of-curvature of the imaging side of the 3rd lens, R6 is the radius-of-curvature of the image source side of the 3rd lens.
6. according to the arbitrary described near infrared interactive projection camera lens of claim 1-5, it is characterized in that: in described camera lens, the second lens imaging side is convex surface.
7. near infrared interactive projection camera lens according to claim 6, is characterized in that: in described camera lens, the 4th lens imaging side is convex surface.
8. near infrared interactive projection camera lens according to claim 7, is characterized in that: in described camera lens, the 4th lens image source side is convex surface.
9. according to claim 1-5,7,8 arbitrary described near infrared interactive projection camera lenses, it is characterized in that: described in to make the catoptrics face of light path bending be reflecting prism, or plane of reflection mirror.
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| CN201410349750.XA CN104142565B (en) | 2014-07-22 | 2014-07-22 | Near-infrared interactive projection camera lens |
| ES15766037.4T ES2689091T3 (en) | 2014-07-22 | 2015-01-30 | Projection lens |
| PCT/CN2015/072050 WO2016011801A1 (en) | 2014-07-22 | 2015-01-30 | Projection lens |
| US14/779,785 US9529180B2 (en) | 2014-07-22 | 2015-01-30 | Projection lens |
| EP15766037.4A EP3026477B1 (en) | 2014-07-22 | 2015-01-30 | Projection lens |
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| CN108333731B (en) * | 2018-03-09 | 2022-12-23 | 中国科学院西安光学精密机械研究所 | Medium wave infrared search tracking lens based on compensating mirror |
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