Free-form surface optical system for folding projection

An optical system and free technology, applied in optics, optical components, instruments, etc., can solve the problems of large space occupation, improve the output image quality, shorten the main optical path, and save packaging space

Pending Publication Date: 2021-07-09
四川省靓固智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problem of the large space occupied by the concave mirror projection optics, it cannot be applied to the needs of product miniaturization

Method used

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  • Free-form surface optical system for folding projection
  • Free-form surface optical system for folding projection
  • Free-form surface optical system for folding projection

Examples

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Embodiment 1

[0038] refer to figure 1 As shown, a free-form optical system for folded projection is shown in the figure. The free-form surface optical system includes a display device, a lens group, a folding mirror and an output mirror.

[0039] Preferably, the lens group focuses the light emitted by the display device onto the folding mirror, and the folding mirror folds and transmits the received light to the output mirror, and the output mirror projects the received light onto the screen superior.

[0040] Preferably, the display device includes but is not limited to adopting LCOS chips.

[0041] Preferably, said lens set is configured to form an inverted virtual image of the display device. And project the light onto the folding mirror.

[0042] Preferably, the folding mirror is arranged towards the side of the display device.

[0043] Further, the folding mirror is configured to fold light backwards, so as to achieve the purpose of reducing the length of the optical element.

[0...

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PUM

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Abstract

The invention discloses a free-form surface optical system for folding projection, the free-form surface optical system comprises a display device, a lens group, a folding mirror and an output mirror, the lens group focuses light emitted by the display device onto the folding mirror, and the folding mirror folds and transmits the received light onto the output mirror. The output mirror projects the received light onto a screen, and the output mirror is of a free-form surface structure. According to the system, the folded mirror image is inserted between the virtual image and the output mirror image, so that the packaging space is saved, and the main light path is shortened. And moreover, the output mirror is arranged in a curved surface shape, so that the quality of an output image is improved.

Description

technical field [0001] The invention belongs to the technical field of short-distance projectors in small spaces, and in particular relates to a free-form surface optical system for folding projection. Background technique [0002] In existing projection technology products, concave mirror projection optics are used for image projection with large throw ratios. However, due to the problem that the concave mirror projection optical device occupies a large space, it cannot be applied to the demand for product miniaturization. Therefore, it is urgent to design a new optical system to realize the miniaturization of the system. Contents of the invention [0003] The purpose of the present invention is to provide a free-form surface optical system for folded projection in order to overcome the problems of the prior art. In this system, the folded image is inserted between the virtual image and the output image, which saves the packaging space and shortens the length of the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/28G02B17/06G02B17/02G02B27/00
CPCG02B17/023G02B17/06G02B27/0012G03B21/28
Inventor 李晓阳李谦李秋实任耕北
Owner 四川省靓固智能科技有限公司
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