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Mini projection lens

A micro-projection and lens technology, which is applied in the field of projection lenses, can solve the problems of reduced brightness of micro-projection lenses, achieve the effect of increasing numerical aperture, ensuring imaging quality, and improving numerical aperture

Pending Publication Date: 2019-04-19
SHENZHEN EVIEWTEK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the focal length of micro-projection lenses on the market is above 2, and the focal length is rarely lower than 1.6. The smaller the numerical aperture, the easier it is to satisfy the imaging quality. However, due to the small numerical aperture, the brightness of the micro-projection lens will also increase. reduce, therefore, how to improve the numerical aperture while ensuring the imaging quality is the technical problem to be solved in this application

Method used

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Embodiment Construction

[0026] 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.

[0027] The present application designs a miniature projection lens, which ensures imaging quality while increasing the numerical aperture.

[0028] For ease of understanding, see figure 1 , figure 1 It is the optical structure diagram of the miniature projection lens in the embodiment of the present application, as figure 1 As shown, specifically:

[0029] A fi...

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Abstract

An embodiment of the invention provides a mini projection lens which comprises a first group lens, a diaphragm, a second group lens, a light splitting device and an image source face. The first grouplens has positive focal length f8 which is greater than 84.06 and less than 86.06, and the second group lens has positive focal length f9 which is greater than 11.06 and less than 13.06. Through optical design, numerical aperture is increased, and imaging quality is ensured.

Description

technical field [0001] The present application relates to the technical field of projection lenses, in particular to a miniature projection lens. Background technique [0002] With the development of science and technology, technologies to serve consumers are emerging, especially in the field of electronic products. As the application scenarios of projection equipment become more abundant and extensive, how to design a projection lens with small size, good image quality, high brightness and low cost is a problem that those skilled in the art need to think about. [0003] At present, the focal length of micro-projection lenses on the market is above 2, and the focal length is rarely lower than 1.6. The smaller the numerical aperture, the easier it is to satisfy the imaging quality. However, due to the small numerical aperture, the brightness of the micro-projection lens will also increase. Therefore, how to ensure the imaging quality while increasing the numerical aperture i...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B1/00G02B1/04
CPCG02B13/00G02B13/18G02B1/00G02B1/04
Inventor 程发超陆巍龚敬剑贺银波
Owner SHENZHEN EVIEWTEK TECH CO LTD
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