Projection lens and projection equipment

A projection lens and lens technology, applied in the field of lenses, can solve the problems of large volume, low image quality, and small field of view, and achieve the effect of small size, large working distance, and large field of view.

A projection lens and lens technology, applied in the field of lenses, can solve the problems of large volume, low image quality, and small field of view, and achieve the effect of small size, large working distance, and large field of view.

CN110908225BActive Publication Date: 2020-11-03CHENGDU XGIMI TECH CO LTD
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  • Projection lens and projection equipment
  • Projection lens and projection equipment

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments in this application, all other embodiments obtained by those of ordinar...

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Abstract

The invention relates to a projection lens and projection equipment, and belongs to the technical field of lenses. The projection lens comprises a front lens group, a diaphragm and a rear lens group which are sequentially distributed from the magnification side to the reduction side; wherein the front lens group comprises a first lens, a second lens and a third lens which are sequentially distributed from an amplification side to a reduction side, and the first lens is an aspheric lens; the rear lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially distributed from the magnification side to the reduction side; at least one of the third lens and the fourth lens is an aspheric lens; the effective focal length of the projection lens is larger than or equal to 8.5 mm, the total length of the projection lens is smaller than or equal to 90 mm, and the back focal length of the projection lens is larger than or equal to 0.3 mm.The projection lens is small in size, the field angle is increased, and imaging distortion and aberration can be effectively solved.

Description

Technical field [0001] This application relates to the field of lens technology, and specifically to a projection lens and a projection device. Background technique [0002] In order to match the incident angle of the DMD (Digital Micro mirror Device: Digital Micro Mirror Device) chip, improve the uniformity of the projected display screen, and rationally lay out the projection equipment components, the lighting system mostly uses TIR (Total Internal Reflection) prisms. Therefore, DLP (Digital Light Processing) system is divided into telecentric lighting system and non-telecentric lighting system according to different product solutions. This requires the use of different types of projection lenses that match the TIR prism. [0003] The existing projector lens generally has disadvantages such as large volume, low image quality, and small field of view angle. Summary of the invention [0004] The purpose of the present application is to provide a projection lens which has a small s...

Claims

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Application Information

Patent Timeline
03 Nov 2020
Publication
CN110908225B
IPC
G03B21/14; G02B13/00; G02B13/06; G02B13/18
CPC
G02B13/0045; G02B13/06; G02B13/18; G03B21/142
Inventors
ι’Ÿζ³’; 肖适