Projection lens and laser projection device
A projection lens and laser beam technology, applied in projection devices, optics, optical components, etc., can solve the problem of the overall complex structure of the number of projection lens lenses, and achieve the effect of simplified structure, convenient volume compression, and small number of lenses for laser projection equipment
Active Publication Date: 2020-05-26
QINGDAO HISENSE LASER DISPLAY CO LTD
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Problems solved by technology
[0007] The embodiment of the present invention provides a projection lens and a laser projection device, which can solve the problem that the overall structure of the number of lenses of the projection lens is relatively complex in the related art
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[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0029] Picture 1-1 It is a schematic diagram of a projection imaging process of a projection lens provided by an embodiment of the present invention, 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 projection ratio of the projection lens 20 (the projection ratio is the ratio of the projection distance s to the screen diagonal length h, and the projection distance s is the lateral distance between the projection lens 20 and the projection screen 10 ). Small, the laser projection equipment can be set closer ...
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The invention discloses a projection lens and a laser projection device, and belongs to the field of optical equipment. The method comprises the steps that the projection lens comprises a refractor set and a reflector which are sequentially arranged in the light emitting direction of a light valve, the refractor set comprises a first lens group, a second lens group and a third lens group which aresequentially arranged in the light emitting direction, and the refractor set and the reflector meet a first formula; and the first lens group comprises nine lenses, the second lens group comprises one lens, the third lens group comprises three lenses, and the first lens group, the second lens group and the third lens group meet a second formula. According to the invention, the refractor set and the reflector set are enabled to meet the first formula, and the three lens groups in the refractor set are enabled to meet the second formula, so that the refractor set comprises 13 lenses in total torealize higher imaging requirements, and the number of the lenses is smaller. The problem that the number of lenses of the whole projection lens is large in the prior art is solved. The effect of reducing the number of lenses is achieved.
Description
[0001] This application claims the priority of the Chinese patent application with the application number 201910212856.8 and the application name "Projection Lens and Laser Projection Device" filed on March 20, 2019, the entire contents of which are incorporated into this application by reference. technical field [0002] The invention relates to the field of optical equipment, in particular to a projection lens and a laser projection device. Background technique [0003] With the improvement of science and technology, with the application of home projection equipment, such as laser ultra-short-focus projection equipment, it can present large-scale, high-definition, high-color gamut and brightness images to users in the state of being attached to the wall. Among them, The above-mentioned high-quality images are presented not only because the laser is used as the light source, but also the ultra-short-focus lens with high resolution is also an important part of the laser proje...
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IPC IPC(8): G03B21/14G02B13/00G02B13/18
CPCG03B21/2033G03B21/28
Inventor 阴亮李晓平
Owner QINGDAO HISENSE LASER DISPLAY CO LTD