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Projection lens and projection equipment

A projection lens and lens technology, applied in the field of projection, can solve the problems of bulky equipment, complex lens combination, and difficulty in reducing the volume of laser projection equipment, and achieve the effect of simplified structure and favorable volume

Pending Publication Date: 2022-05-27
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Projection lens and projection equipment
  • Projection lens and projection equipment
  • Projection lens and projection equipment

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Experimental program
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Embodiment Construction

[0032] 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.

[0033] figure 1 It is a schematic diagram of a projection lens projection imaging process provided by an embodiment of the present application, and the implementation environment may include a projection screen 10 and a projection lens 20 .

[0034] 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), the more the throw ratio Small, the laser projection ...

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Abstract

The invention discloses a projection lens and projection equipment, and belongs to the technical field of projection. The projection lens comprises a refractor group and a reflector group. The refractor group comprises a first lens group, a second lens group and a third lens group which are sequentially arranged along the light emitting direction, the first lens group, the second lens group and the third lens group meet the following conditions: F2 / F1 is more than 2 and less than 12, F3 / F1 is more than 0.5 and less than 5, and F4 / F1 is more than 1 and less than 10, and the first lens group comprises nine lenses arranged along the light emitting direction. According to the structure of the projection lens provided by the invention, the focal lengths of the three lens groups in the refractor group meet the corresponding proportion size relationship, so that the lens can realize higher imaging requirements with a smaller size. The problem that the size of a projection lens is difficult to reduce in the prior art is solved, and the effect of reducing the size of the projection lens is achieved.

Description

technical field [0001] The present application relates to the field of projection technology, in particular to a projection lens and 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 conjunc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/22G03B21/14
CPCG02B13/0045G02B13/006G02B13/0065G02B13/18G02B13/22G03B21/14
Inventor 阴亮杜玉楠
Owner QINGDAO HISENSE LASER DISPLAY CO LTD