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.

Active Publication Date: 2020-11-03
CHENGDU XGIMI TECH CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing projector lenses generally have disadvantages such as large size, low image quality, and small field of view

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Projection lens and projection equipment
  • Projection lens and projection equipment

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18G03B21/142
Inventor 钟波肖适尹蕾唐艺
Owner CHENGDU XGIMI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap