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Ultra-short-focus projection optical lens and ultra-short-focus projection optical system

A projection optical system and projection optics technology, applied in the field of ultra-short-focus projection optical lens and ultra-short-focus projection optical system, can solve the problems of high processing and assembly precision, complex structure of ultra-short-focus projection optical lens, etc. The effect of processing accuracy and assembly accuracy, reducing aberration and reducing complexity

Pending Publication Date: 2021-02-12
中山联合光电研究院有限公司
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Problems solved by technology

[0004] The main purpose of the present invention is to propose an ultra-short-focus projection optical lens and an ultra-short-focus projection optical system, aiming at solving the problems of the existing ultra-short-focus projection optical lens with complex structure and high processing and assembly precision requirements

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Embodiment Construction

[0038]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039]It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.

[0040]In ad...

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Abstract

The invention discloses an ultra-short-focus projection optical lens and an ultra-short-focus projection optical system; the ultra-short-focus projection optical lens comprises a shell, a refraction lens group and an aspheric reflector, wherein the refraction lens group and the aspheric reflector are mounted in an inner cavity of the housing and are sequentially and fixedly arranged in a refraction projection direction. An optical axis is correspondingly formed in the shell between the refraction lens group and the aspheric reflector, the refraction lens group sequentially comprises a first spherical lens, a second aspheric lens, a third spherical lens, a fourth spherical lens, a fifth spherical lens, a sixth spherical lens, a diaphragm, a seventh spherical lens, an eighth aspheric lens, aninth spherical lens, a tenth aspheric lens, an eleventh aspheric lens and a twelfth spherical lens from the object side to the image side. According to the technical scheme provided by the invention, at least twelve refraction lenses and one aspheric reflector are arranged, so that the requirements on the projection lens in the aspects of processing and adjustment precision are relatively low.

Description

Technical field[0001]The invention relates to the field of optical systems in projection technology, in particular to an ultra-short-focus projection optical lens and an ultra-short-focus projection optical system.Background technique[0002]With the rapid development of the information age, large-screen projection display, as an effective means of information output, is playing an increasingly important role in people's lives and work. The main principle of projection display technology is to magnify the image source generated by the display device through an optical system and project it onto the screen to produce a clear image. The ultra-short throw projection lens can shorten the projection distance, realize large-screen projection, and give users an immersive viewing experience.[0003]In order to achieve short focal length large-screen projection, the field of view of the ultra-short-focus projection optical system is required to be larger and larger, and aberrations such as disto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G03B21/14
CPCG02B13/0045G02B13/006G02B13/0065G02B13/18G03B21/142
Inventor 于百华陈建军吕强朱晓强孔旭东王玉姚洪辉王浩
Owner 中山联合光电研究院有限公司
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