Aspheric ultra-short throwing projection lens

A technology of projection lens and aspheric lens, which is applied in the field of aspheric ultra-short-focus projection lens, can solve the problems of uneven illumination on the projection surface and difficulty in meeting the needs of the size of the projected picture, so as to achieve better image quality, reduce the radius of curvature, The effect of uniform image quality in the field of view

Pending Publication Date: 2019-12-27
上海悉德信息科技有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Traditional projection lenses with long focal lengths and narrow viewing angles are difficult to meet the needs in terms of size and projection picture quality
At the same time, because the generally designed lens does not achieve strict image telecentricity, it causes a relatively serious phenomenon of uneven illumination on the projection surface

Method used

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  • Aspheric ultra-short throwing projection lens
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  • Aspheric ultra-short throwing projection lens

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0041] In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements ...

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Abstract

The invention provides an aspheric ultra-short throwing projection lens. The aspheric ultra-short throwing projection lens comprises a plurality of coaxial lenses positioned between a projection surface and a DMD chip, a front lens group for deflecting wide-angle light into a paraxial light beam, and a rear lens group for telecentric imaging of the paraxial light beam on the DMD chip.

Description

technical field [0001] The invention relates to the field of photoelectric display, in particular to the field of projection equipment, in particular to an aspheric ultra-short-focus projection lens. Background technique [0002] At present, ordinary projectors are only equipped with standard lenses. If such a projector wants to project a picture of 152.4cm, the projector needs to be placed at a distance of 2.2m, and for 203.2cm, it must be at a distance of 2.6m. The picture should reach 3m to 4m away. If the space for projection is not large, but a larger image needs to be displayed, especially in a small conference room, this lens cannot meet the demand. Moreover, if the speaker inadvertently blocks the light from time to time, the audience watching will be greatly affected. Considering these factors, in recent years, some people have invented short-focus lenses, which have improved the high requirements for projection distance, but the image quality cannot be guaranteed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/24G02B13/06G02B13/18G02B1/00H04N9/31
CPCG02B1/00G02B13/0045G02B13/06G02B13/24H04N9/3141
Inventor 王仕龙周岸迪
Owner 上海悉德信息科技有限公司
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