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A small full HD short throw projection lens

A short-focus projection and projection lens technology, applied in the field of projection, can solve the problems of increasing the difficulty of increasing the back focus, and achieve the effect of low cost, high TV distortion, and precise structure

Active Publication Date: 2021-07-30
安徽仁和光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in order to add the vibrating mirror, the back focus of the lens needs to reserve a certain space
And increasing the back focus is relatively more difficult in design

Method used

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  • A small full HD short throw projection lens
  • A small full HD short throw projection lens
  • A small full HD short throw projection lens

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Embodiment Construction

[0020] The specific embodiment of the present invention will be further described in conjunction with the accompanying drawings.

[0021] From figure 1 The structure adopted in the present invention is: a small-sized full high-definition short-focus projection lens, including a projection lens body, and the projection lens includes a reflector 1 arranged between the projection surface 3 and the DMD chip 4 and several coaxially arranged Lens assembly 2, window glass 8, the several coaxial arrangement sequences of said lens assembly from reflector to DMD chip are the first negative meniscus lens 21, the second positive meniscus lens 22, the third concave lens 23, The fourth positive meniscus lens 24, the fifth positive meniscus lens 25, the triplet lens 26, the seventh convex lens 27; the projection light beam modulated by the DMD chip passes through the lens assembly and the reflector in turn and is projected on the projection surface imaging.

[0022] The projection lens als...

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Abstract

The invention discloses a small-sized full-high-definition short-focus projection lens, which includes a projection lens body, and the projection lens includes a reflector arranged between a projection surface and a DMD chip and several coaxially arranged lens assemblies. The sequence of coaxial arrangements between the mirror and the DMD chip is the first negative meniscus lens, the second positive meniscus lens, the third concave lens, the fourth positive meniscus lens, the fifth positive meniscus lens, and the triple glued a lens, a seventh convex lens; the projected light beam modulated by the DMD chip passes through the lens assembly and the mirror in sequence and forms an image on the projected surface. Use aspherical lenses to design lenses to meet the higher definition and TV distortion requirements of aspheric surfaces; use appropriate F-number design to ensure that MTF maintains a higher value.

Description

technical field [0001] The invention belongs to the projection technology in the photoelectric display industry, and in particular relates to a small-sized full high-definition short-focus projection lens. Background technique [0002] At present, projectors with higher pixels generally use aspherical projection lenses, and the requirements for definition and TV distortion are relatively easy to meet. The present invention uses the aspheric lens to design the lens and reflector to meet the higher definition and TV distortion requirements of the aspheric surface. [0003] At present, a galvanometer is added between the lens and the chip, and the resolution can be doubled by using XPR technology. But in order to add the galvanometer, the back focus of the lens needs to reserve a certain space. And increasing the back focus is relatively more difficult in design. At the same time, the increase in resolution also increases the design requirements of the lens for resolution. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18G02B27/00G03B21/14
CPCG02B13/0045G02B13/006G02B13/18G02B27/0012G03B21/147
Inventor 周伟统
Owner 安徽仁和光电科技有限公司