All-spherical-surface high-definition LCOS (liquid crystal on silicon) projector lens

Abstract

The invention provides an all-spherical-surface high-definition LCOS (liquid crystal on silicon) projector lens, which is composed of eight different spherical-surface lenses, wherein the transfer is higher than 50%@601p / mm and the distortion is less than 0.2%, therefore the lens is suitable for the high-definition single LCOS projector with definition of 1920*1080; the focal length of the lens is 19.24mm; and F / # is 1.7, and the projection ratio is 1.8.

Description

technical field [0001] The invention relates to a projection objective lens (hereinafter referred to as a lens) for a single-chip LCOS (abbreviation of Liquid Crystal on Silicon) front-projection projector. LCOS is a liquid crystal display technology using active dot matrix reflection. The present invention is simple to manufacture, the transmission letter is greater than 50% 60lp / mm, the distortion is less than 0.2%, and is suitable for high-definition (1920*1080 resolution) single-chip LCOS projectors. Background technique [0002] According to the classification of image display devices, at present, the image display technology of front projection projectors is mainly divided into three technical fields: 3LCD, DLP and LCOS. The projection lens currently used in single-chip LCOS projectors is often less than 50% 60lp / mm, and the resolution cannot reach high-definition (1920*1080). In order to achieve high-definition resolution requirements, it is often necessary to use as...

AI Technical Summary

Problems solved by technology

The projection lens currently used in single-chip LCOS projectors usually has a transmission ratio of less than 50% 60lp / mm, and the resolution cannot reach high-definition (1920*1080)

However, if you want to meet the high-definition resolution requirements, you often need to use aspheric technology, which greatly increases the difficulty of processing.

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