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Projection imaging system and laser projection device

An imaging system and projection technology, applied in projection devices, optics, instruments, etc., can solve the problems of low imaging quality and large picture distortion in projection imaging systems, and achieve high imaging quality

Active Publication Date: 2020-12-01
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a projection imaging system and a laser projection device, which can solve the problem in the related art that the image distortion caused by adjusting the distance between the refracting mirror group and the reflecting mirror may be relatively large, making the imaging quality of the projection imaging system low question

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  • Projection imaging system and laser projection device
  • Projection imaging system and laser projection device
  • Projection imaging system and laser projection device

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] figure 1 is a schematic diagram of an implementation environment for some embodiments of the present invention, which may include a screen 10 and a projection imaging system 20 .

[0042] The projection imaging system 20 can transmit an image beam to the screen 10 , and the image beam can form an image on the screen 12 . The current development trend is to reduce the projection ratio of the projection imaging system 20 (the projection ratio is the ratio of the projection distance s to the screen width h, and the projection distance s is the distance between the projection imaging system 20 and the screen 10). Imaging systems can project larger images at shorter projection distances. A projection imaging system with a small thr...

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Abstract

The invention discloses a projection imaging system which comprises a refractor group and a mirror, wherein the refractor group and the mirror are arranged in sequence along the light exiting direction of a light valve and satisfy the formula: 0.9<L1 / L2<1.2. L1 is the length of the refractor group. L2 is the distance between the refractor group and the mirror. In the refractor group, a rear groupmirror group with positive diopter, a middle group mirror group with positive diopter and a front group mirror group with negative diopter are arranged in sequence along the light emitting path of thelight valve. A formula in the description is satisfied. F is the equivalent focal length of the refractor group. FB is the equivalent focal length of the rear group mirror group. FM is the equivalentfocal length of the middle group mirror group. FF is the equivalent focal length of the front group mirror group. FC is the equivalent focal length of the mirror. The problem of large picture distortion caused by adjusting the distance between the refractor group and the mirror in the related art is solved.

Description

technical field [0001] The invention relates to the field of optical equipment, in particular to a projection imaging system and a laser projection device. Background technique [0002] With the improvement of science and technology, projection imaging systems are more and more widely used in people's work and life, such as education, office, home or entertainment. For example, for projection imaging systems used in home theaters, the resolution of projection imaging systems is higher. High, the user experience is higher. Therefore, people have higher and higher requirements for projection imaging systems. [0003] In related technologies, ultra-short-focus projection equipment tends to be used in household projection equipment. The ultra-short-focus projection imaging system includes: a light valve, a refracting mirror group, and a reflector; wherein, the light valve is used to generate an image beam, and the image beam first enters the refraction The mirror group and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/28
CPCG03B21/147G03B21/28
Inventor 阴亮董淑斌
Owner QINGDAO HISENSE LASER DISPLAY CO LTD