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A projection lens and interactive technology, applied in the field of projection lenses, can solve problems such as large distortion, unfavorable miniaturization, and lengthening of the projection lens, and achieve the effect of improving optical performance, excellent resolution, and large field of view
Active Publication Date: 2014-07-02
ZHEJIANG SUNNY OPTICAL CO LTD
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[0003] Traditional projection lenses are generally used for imaging. By using more lenses to eliminate various aberrations to improve resolution, but the overall length of the projection lens will be lengthened, which is not conducive to miniaturization; and the general large field of view projection Lens, distortion will be large, can not meet the requirements of high resolution
For example, the patent number is "CN102879888A" and the publication date is "2013.1.16". The lens has seven lenses and a total...
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Embodiment 1
[0062] In Example 1, the parameters are as follows: TTL=13.06; f1=-2.455; f2=2.609; f3=-3.410; f4=5.544; f5=5.362; f=1.588;
[0063] ImgH / D=0.624;
[0064] f3 / f=-2.147;
[0065] System parameters: 1 / 6" photosensitive device aperture value 1.8
[0066] Table 1
[0067] surface type
[0068] The following table is the aspheric high-order coefficients A4, A6, A8, A10, A12 of the aspheric lens:
[0069] Table 2
[0070] A4
[0071] Figure 2 to Figure 5 The axial chromatic aberration diagram, astigmatism diagram, distortion diagram, and magnification chromatic aberration diagram in Embodiment 1 are shown respectively, and the optical effect in Embodiment 1 can be seen from the diagrams.
Embodiment 2
[0074] In Example 2, the parameters are as follows: TTL=12.756; f1=-2.473; f2=2.546; f3=-3.789; f4=6.247; f5=5.362; f=1.588;
[0075] ImgH / D=0.623;
[0076] f3 / f=-2.386;
[0077] System parameters: 1 / 6" photosensitive device aperture value 1.8
[0078] table 3
[0079] surface type
[0080] The following table is the aspheric high-order coefficients A4, A6, A8, A10, A12 of the aspheric lens:
[0081] Table 4
[0082] A4
[0083] Figure 7 to Figure 10 The axial chromatic aberration diagram, astigmatism diagram, distortion diagram, and magnification chromatic aberration diagram in Embodiment 2 are shown respectively, and the optical effect in Embodiment 2 can be seen from the diagrams.
Embodiment 3
[0086] In Example 3, the parameters are as follows: TTL=13.54; f1=-2.330; f2=2.752; f3=-4.790; f4=7.467; f5=5.362; f=1.588;
[0087] ImgH / D=0.619;
[0088] f3 / f=-3.016;
[0089] System parameters: 1 / 6" photosensitive device aperture value 1.8
[0090] table 5
[0091] surface type
[0092] The following table is the aspheric high-order coefficients A4, A6, A8, A10, A12 of the aspheric lens:
[0093] Table 6
[0094] A4
[0095] Figure 12 to Figure 15 The axial chromatic aberration diagram, astigmatism diagram, distortion diagram, and magnification chromatic aberration diagram in Embodiment 3 are shown respectively, and the optical effect in Embodiment 3 can be seen from the diagrams.
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Abstract
The invention provides a projection lens. The projection lens comprises a first lens set, a second lens set, a third lens set and a fourth lens set from an imaging side to an image source side in sequence, wherein the first lens set comprises a first lens with negative focal power and a reflection optical face enabling a light path to bend; the second lens set comprises a second lens with positive focal power, and the faces, facing the imaging side, of the second lens and the image source side, of the second lens are convex faces; the third lens set comprises a third lens with negative focal power; the fourth lens set has positive focal power and comprises one or more lenses with focal power, and the face, closest to the imaging side, of the fourth lens set is a convex face. The lens meets the following relation of ImgH/D>0.55, wherein ImgH is one half the diameter of an image source, and D is the vertical distance between the face, facing the imaging side, of the first lens and the center position of the reflection optical face. According to the projection lens, because the four lens sets are adopted, the size of a lens system can be effectively reduced, it can be guaranteed that the lens has a large resolution ratio under the large-view-angle condition, and the large-view-field-angle, small-distortion and high-resolution-ratio technical effects are achieved.
Description
technical field [0001] The invention relates to an optical projection system composed of four lens groups, in particular to a projection lens applicable to a 3D interactive system. Background technique [0002] In recent years, with the continuous advancement of technology and the gradual rise of 3D interactive devices, the application range of projection lenses has become wider and wider. In order to be suitable for miniaturized electronic equipment, the projection lens needs to have a sufficient field of view while ensuring miniaturization, so as to obtain a larger picture in a narrower place. [0003] Traditional projection lenses are generally used for imaging. By using more lenses to eliminate various aberrations to improve resolution, but the overall length of the projection lens will be lengthened, which is not conducive to miniaturization; and the general large field of view projection The lens and the distortion will be large, which cannot meet the requirements of ...
Claims
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Application Information
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