Ultrahigh-resolution miniature projection lens
A super-high-resolution, micro-projection technology, applied in optics, instruments, projection devices, etc., can solve the problem that the micro-projection lens cannot reach high resolution, and achieve the effect of good imaging quality, small total length, and uniform illumination
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Embodiment 1
[0040] see figure 1 , figure 1 The optical structure diagram of the miniature projection lens provided by the application example of the present invention; the present invention provides a kind of ultra-high resolution miniature projection lens, which comprises: the first lens group with positive focal length, aperture 6, The second lens group with positive focal length, vibrating mirror 12, prism 13, window plate 14 and DMD; Wherein the first lens group comprises, the first lens 1 is a glass spherical lens, the second lens 2 is a plastic aspheric lens, the third Lens 3 is a glass spherical lens, the fourth lens 4 is a glass spherical lens, and the fifth lens 5 is a glass spherical lens; wherein the second lens group includes, the sixth lens 7 is a glass spherical lens, the seventh lens 8 is a glass spherical lens, The eighth lens 9 is a glass spherical lens, the ninth lens 10 is a glass spherical lens, and the tenth lens 11 is a glass aspherical lens.
[0041] Wherein the f...
Embodiment 2
[0057] see Figure 7 , Figure 7 It is an optical structure diagram of an ultra-high resolution miniature projection lens provided by Embodiment 2 of the present invention. In this embodiment, the galvanometer (XPR) is not used, and the conventional resolution of 1080P is achieved by adjusting the back intercept. The specific parameters are shown in Table 3:
[0058] table 3
[0059]
[0060] According to the lens parameters described in Table 3, it can be concluded that Figure 7 Micro projection lens shown. Figure 8 It is an image of the MTF of the whole field of view changing with the spatial frequency, and the transfer function MTF of each field of view at the spatial frequency of 93lp / mm>0.45. Figure 9 It is a spot diagram of each field of view. The spot size of each field of view becomes larger due to the existence of spherical aberration, but the RMS of the full field of view is still smaller than the pixel size (5.4μ). Figure 10 In the middle, the image on t...
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Abstract
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