Low principal ray incident angle super wide angle optical system and working method thereof

An optical system and incident angle technology, applied in optics, optical components, instruments, etc., can solve the problems of low relative illumination of video surveillance wide-angle lens and large incident angle of chief light, and achieve slight purple fringing phenomenon, high relative illumination, and improved refraction. rate effect

Active Publication Date: 2019-01-18
FUJIAN FORECAM OPTICS CO LTD
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention improves the above-mentioned problems, that is, the technical problems to be solved by the present invention are the problems of low relative il

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
  • Low principal ray incident angle super wide angle optical system and working method thereof
  • Low principal ray incident angle super wide angle optical system and working method thereof
  • Low principal ray incident angle super wide angle optical system and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as Figure 1~4 As shown, a low chief ray incident angle ultra-wide-angle optical system includes a lens barrel and an optical system arranged in the lens barrel. Lunar negative lens L2, biconvex positive lens L3, aperture stop S1, meniscus positive lens L4, biconvex positive lens L5 and meniscus negative lens L6 constitute the cemented lens and biconvex positive lens L7, and the image plane and double A parallel flat plate P1 is arranged between the convex positive lenses L7.

[0016] In this embodiment, the air interval between the meniscus negative lens L1 and the meniscus negative lens L2 is 2.7 mm; the air interval between the meniscus negative lens L2 and the biconvex positive lens L3 is 1.9 mm; the biconvex positive lens L3 The air gap between the meniscus positive lens L4 and the meniscus positive lens L4 is 1.2 m...

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 present invention provides a low principal ray incident angle super wide angle optical system and a working method thereof. The system comprises a lens tube and the optical system arranged in thelens tube. The optical system comprises a crescent negative lens L1, a crescent negative lens L2, a biconvex positive lens L3, an aperture light diaphragm S1, a crescent positive lens L4, a bonded lens consisting of a biconvex positive lens L5 and a crescent negative lens L6 and a biconvex positive lens L7 successively arranged along the direction from the position of light incident to an imagingplane. A parallel flat plate P1 is arranged between the imaging plane and the biconvex positive lens L7. The optical lens system has a very large view field angle and is capable of shooting a wide range of scenery, the relative illumination is relatively high, and especially, the incident angle of a principal ray is low under the condition of the large view field angle, so that the system can be well adapted to the current video surveillance imaging chip, and the lens can be used with a 5 million pixel CCD or a CMOS chip.

Description

technical field [0001] The invention relates to an ultra-wide-angle optical system with a low chief ray incident angle and a working method thereof. Background technique [0002] The lens is the indispensable "eye" of the video surveillance system. With the development of imaging chip technology, the requirements for the resolution of the lens are getting higher and higher, and the matching degree between the lens and the imaging chip is also getting higher and higher. At present, the wide-angle surveillance lenses on the market still have relatively low relative illuminance, and the incident angle of the chief ray is too large to match the imaging chip well, so that when the surveillance lens is used with a surveillance camera, the effect of the peripheral field of view is quite different from that of the central field of view, especially in It is more obvious when the resolution of the imaging chip is high. When this type of lens is used with a camera, it is difficult to ...

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
IPC IPC(8): G02B13/00G02B13/06G02B27/00
CPCG02B13/0015G02B13/06G02B27/0025
Inventor 林孝同周建宝张荣曜李俊攀
Owner FUJIAN FORECAM OPTICS 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