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Projection lens and laser projection device

A technology of projection lens and lens, which is applied in the direction of using projection device image reproducer, projection device, optics, etc., can solve the problems of low imaging quality and large picture distortion of projection imaging system, and achieve the effect of high imaging quality

Active Publication Date: 2021-02-02
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a projection lens 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, resulting in low imaging quality of the projection imaging system

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  • Projection lens and laser projection device
  • Projection lens and laser projection device
  • Projection lens and laser projection device

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Embodiment Construction

[0039]To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040]figure 1 It is a schematic diagram of an implementation environment of some embodiments of the present invention. The implementation environment may include a screen 10 and a projection imaging system 20.

[0041]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). The smaller the projection ratio, the projection The imaging system can project a larger image at a shorter projection distan...

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Abstract

The invention discloses a projection lens, which comprises a refracting mirror group arranged along the light emitting direction of a light valve; in the above refracting mirror group, a rear group mirror group with a positive diopter and a middle mirror group with a positive diopter are arranged in sequence along the light emitting direction of the light valve. The group lens group and the front group lens group with negative diopter; the above-mentioned rear group lens group and the middle group lens group can move along the direction of the light output of the light valve or the opposite direction of the light output direction of the light valve to adjust the focal plane of the projection imaging system; the above-mentioned front The distance L2 between the group mirror group and the curved reflector arranged in the light emitting direction of the front group mirror group is constant, and 69mm≤L2≤91mm. The focal plane of the projection imaging system can be adjusted without changing the distance between the refracting mirror group and the reflecting mirror. It solves 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, resulting in low imaging quality of the projection imaging system.

Description

Technical field[0001]The invention relates to the field of optical equipment, in particular to a projection lens 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 High, the higher the user’s viewing experience. Therefore, people's requirements for projection imaging systems are getting higher and higher.[0003]In related technologies, household projection equipment tends to use ultra-short-throw projection equipment. The ultra-short-throw projection imaging system includes a light valve, a refraction lens group, and a mirror; among them, the light valve is used to generate an image beam, and the image beam first enters the refraction The mirror group and the refraction mirror group images ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14H04N9/31G02B15/14
CPCG02B15/14G03B21/14H04N9/317
Inventor 阴亮董淑斌
Owner QINGDAO HISENSE LASER DISPLAY CO LTD