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A design method of ultra-short-focus objective lens system for miniature projection

A design method and micro-projection technology, applied in the field of projection objective lenses, can solve the problems of low image quality, high complexity of mirrors and high process requirements, and achieve the effects of easy manufacturing, reduced complexity and process requirements, and easy to balance aberrations

Active Publication Date: 2022-05-20
SHENZHEN EVIEWTEK TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a design method for an ultra-short-focus objective lens system for miniature projection, which is used to solve the problem of low image quality, high complexity of mirrors, and high process requirements in the existing ultra-short-focus objective lens system design method question

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  • A design method of ultra-short-focus objective lens system for miniature projection
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  • A design method of ultra-short-focus objective lens system for miniature projection

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0021] For ease of understanding, see figure 1 , a method for designing an ultra-short-focus objective lens system for miniature projection provided by the present application, the ultra-short-focus objective lens system includes a reflection module and a transmission module, the reflection module includes a mirror, and the lens module includes an aperture stop , ...

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Abstract

This application discloses a design method of an ultra-short-focus objective lens system for micro-projection. After the light is reflected by the mirror, the angle at which the reflected light enters the pupil is restricted within a small angle range, so that the lens module It only needs to balance the field of view beam with a small incident angle to obtain better image quality. At the same time, the free-form surface of the mirror is represented by the low-order characterization state, which reduces the complexity of curve fitting. At the same time, due to the low-order The aspherical surface type is easier to manufacture, thus reducing the complexity and process requirements of the reflector.

Description

technical field [0001] The present application relates to the technical field of projection objective lens, in particular to a design method of an ultra-short-focus objective lens system for miniature projection. Background technique [0002] The existing micro-projection ultra-short-focus objective lens system mainly uses two types: one is to use the transmission frame of "approximate fish-eye system" to design the micro-projection objective lens, and use the transmission frame of "approximate fish-eye system" to carry out micro-projection The design of the projection objective is mainly limited by the outermost lens element, whether it is the incident angle of light, or the lens aperture, and the relative low illumination of the peripheral field of view are unavoidable risks for this type of system. [0003] The second is to use the free-form surface reflective and transmissive compound system framework to design the micro-projection objective lens, and use the free-form s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G03B21/14G02B13/00
CPCG02B27/0012G02B27/0025G02B27/0081G03B21/142G02B13/0065
Inventor 魏威贺银波许礼强邹思源刘夏姜玥伊杨铭
Owner SHENZHEN EVIEWTEK TECH CO LTD