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Laser projection device

A technology for laser projection and equipment, applied in optics, instruments, projection devices, etc., can solve the problems of the difficulty of reducing the size of laser projection equipment, the overall structure of the projection lens, and the complex lens combination, etc., to achieve high-resolution ultra-short focus projection, The mirror group design is simple and the mirror group work is efficient.

Active Publication Date: 2020-05-29
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0005] That is, in order to achieve higher resolution and shorter focal length, the combination of lenses in the projection lens is usually more complicated
As a result, the overall structure of the projection lens is relatively complex, which is not conducive to the reduction of the lens volume, and the volume of the projection lens accounts for more than one-third of the optical engine of the projection device, which will also make it difficult to reduce the volume of the entire laser projection device. device looks bulky

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  • Laser projection device
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Embodiment Construction

[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0029] Picture 1-1 It is a schematic diagram of a projection lens projection imaging process provided by the embodiment of the present application, and the implementation environment may include a projection screen 10 and a projection lens 20 .

[0030] The projection lens 20 can project an image beam to the projection screen 10 , and the image beam can form an image on the screen 10 . The current development trend is to reduce the throw ratio of the projection lens 20 (the throw ratio is the ratio of the projection distance s to the diagonal length h of the screen, and the projection distance s is the lateral distance between the projection lens 20 and the projection screen 10). Smaller, the laser projection device can be set c...

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Abstract

The invention discloses a laser projection device. A projection lens comprises a refractor group and a reflector group. A first aspheric lens is arranged in the refractor group of the projection lensand is close to a light valve, and a second aspheric lens is arranged to be close to the reflector group; the other lenses in the refractor group are spherical lenses; a triple cemented lens, at leastone single lens, a double cemented lens and three single lenses are sequentially arranged between the first aspheric lens and the second aspheric lens; and the refractor group and the reflector groupsatisfy the following condition that L2 / L1 is greater than or equal to 0.2 and is less than or equal to 0.5, the L1 is a length of the refractor group, and the L2 is a distance between the refractorgroup and the reflector group. The projection lens can realize ultra-short-focus projection, the number of the lenses is small, and the length of the lens is short.

Description

technical field [0001] The present application relates to the field of optical equipment, in particular to a laser projection equipment. Background technique [0002] With the improvement of science and technology, with the application of household projection equipment, such as laser ultra-short-focus projection equipment, it can present large-size, high-definition, high-color gamut and brightness images to users in the wall-mounted state. Among them, Presenting the above-mentioned high-quality images is not only due to the application of laser light as the light source, but also the ultra-short-focus lens with high resolution capability is also an important part of laser projection equipment. The higher the resolution capability of the projection lens, the higher the user viewing experience. [0003] In the lens design process, it is necessary to take into account the needs of many aspects. For example, the projection lens needs to be designed in conjunction with the ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G03B21/28
CPCG03B21/2033G03B21/28
Inventor 阴亮李晓平
Owner QINGDAO HISENSE LASER DISPLAY CO LTD