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A super high resolution miniature projection lens

An ultra-high-resolution, micro-projection technology, applied in instruments, projection devices, optics, etc., can solve the problem that the micro-projection lens cannot reach high resolution, achieve good correction of chromatic aberration, uniform illumination, and reduce beam height Effect

Active Publication Date: 2022-05-03
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an ultra-high resolution miniature projection lens to solve the problem that the existing miniature projection lens cannot meet the high resolution required by the market

Method used

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  • A super high resolution miniature projection lens
  • A super high resolution miniature projection lens
  • A super high resolution miniature projection lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 , figure 1 The optical structure diagram of the micro-projection lens provided by the application example of the present invention; the present invention provides an ultra-high-resolution micro-projection lens, the lens comprises: a first lens group with a positive focal length, a diaphragm 6, A second lens group with a positive focal length, a galvanometer 12, a prism 13, a window 14 and a DMD; wherein the first lens group includes, the first lens 1 is a glass spherical lens, the second lens 2 is a plastic aspherical lens, and the third The 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 aspheric lens.

[0041] The first lens 1 ...

Embodiment 2

[0057] see Figure 7 , Figure 7 This is an optical structure diagram of an ultra-high-resolution micro-projection lens provided in Embodiment 2 of the present invention. This embodiment does not use the galvanometer (XPR), 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 obtained as follows: Figure 7 Miniature projection lens shown. Figure 8 It is the image of the MTF of the whole field of view changing with the spatial frequency, and the transfer function of each field of view is MTF>0.45 at the spatial frequency of 93lp / mm. Figure 9 is the spot diagram of each field of view, the spot size of each field of view has become 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...

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Abstract

The invention discloses an ultra-high resolution miniature projection lens, which comprises a first lens group with a positive focal length, a diaphragm, a second lens group with a positive focal length, a vibrating mirror, a prism, a window plate and a DMD arranged in sequence. The first lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence; the second lens group includes a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged in sequence. The lens and the tenth lens, the sixth lens, the seventh lens and the eighth lens are triplet lenses. The second lens is a plastic aspheric lens, the tenth lens is a glass aspheric lens, and the other lenses are all glass spherical lenses. The first lens, the second lens, the third lens and the triplet lens have negative refractive power, and the fourth lens, the fifth lens, the ninth lens and the tenth lens have positive refractive power. The miniature projection lens of the present invention has a small overall length, is compatible with XPR technology, realizes 4K ultra-high resolution, and meets the requirements of miniature projection equipment.

Description

technical field [0001] The invention relates to the technical field of WeChat projection lenses, in particular to an ultra-high resolution miniature projection lens. Background technique [0002] The projection lens is the core component of the projection equipment: after the light passes through the reflective or penetrating light modulation device, it needs to be projected onto the projection screen through the projection lens for imaging. [0003] As projection equipment plays a larger and larger role in life, it will be applied in more and more fields. More devices need to be embedded in pico-projection devices, which requires higher and higher projection lenses, smaller size and more compact structure. [0004] However, in order to achieve a small size, the resolution of the existing projection lenses on the market will be reduced, and thus cannot meet the needs of high-resolution users. SUMMARY OF THE INVENTION [0005] The present invention provides an ultra-high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/22G02B1/00G03B21/14
CPCG02B13/0045G02B13/006G02B13/0065G02B13/18G02B13/22G02B1/00G03B21/14
Inventor 何磊
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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