Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-distortion fisheye lens

A fisheye lens and lens technology, applied in optical components, optics, instruments, etc., can solve the problems of large distortion of fisheye lens properties, image deformation, short focal length, etc., and achieve smooth light trend, reduced distortion, and good aberration correction. Effect

Pending Publication Date: 2021-01-29
JIANGXI PHENIX OPTICS TECH CO LTD
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, because of its large field of view, fisheye lenses can achieve full spatial inclusion and full-time real-time information acquisition, and more people have been used in scene monitoring. However, because of its large field of view and short focal length , making the image formed by it quite deformed. This deformation is commonly known as distortion in optics.
The traditional all-glass fisheye lens has a large distortion due to the inherent properties of the fisheye lens

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-distortion fisheye lens
  • Low-distortion fisheye lens
  • Low-distortion fisheye lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0038] As shown in Figure 1, the present invention provides a low-distortion fisheye lens, comprising a first lens with convex-concave negative refractive power arranged in sequence from the incident direction of light, a second lens with convex-concave negative refractive power, and a double-concave negative optical power lens. Power third lens, biconvex plus fourth lens, biconvex plus fifth lens, biconvex plus sixth lens, concave-convex minus seventh lens, biconvex plus focal powe...

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 belongs to the field of lenses, and particularly relates to a low-distortion fisheye lens which comprises a first lens with convex-concave negative focal power, a second lens with convex-concave negative focal power, a third lens with biconcave negative focal power, a fourth lens with biconvex positive focal power, a fifth lens with biconvex positive focal power, a sixth lens with biconvex positive focal power, a seventh lens with concave-convex negative focal power, and an eighth with biconvex positive focal power which are sequentially arranged from an object side to an image side. The lenses are all glass lenses, the first to seventh lenses are glass spherical surfaces, and the eighth lens is a glass aspheric surface. The sixth lens and the seventh lens are doublet lenses.Through the use of the doublet lenses and the glass aspheric surface, the focal power is reasonably distributed, the F-Theta distortion is as small as 0.8%, the total optical length is shortened to 16.7 mm, the light ray trend is gentle, the aberration correction is good, defocusing does not occur in high and low temperature environments of -40 DEG C to 85 DEG C, and the resolution remains unchanged in a large field of view of 190 degrees.

Description

technical field [0001] The invention belongs to the field of monitoring lenses, in particular to a low-distortion fisheye lens. Background technique [0002] In recent years, because of its large field of view, fisheye lenses can achieve full spatial inclusion and full-time real-time information acquisition, and more people have been used in scene monitoring. However, because of its large field of view and short focal length , making the image formed by it quite deformed, which is commonly known as distortion in optics. The traditional all-glass fisheye lens has a lot of distortion due to the inherent properties of the fisheye lens. The present invention uses an aspherical glass lens, combined with the use of a doublet lens, effectively reduces the distortion of the fisheye lens, and by rationally distributing the optical power, the present invention has a large field of view of 190° Under normal circumstances, the F-Theta distortion is as small as 0.8%, the total optical ...

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): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/006G02B13/06
Inventor 张锦华高屹东
Owner JIANGXI PHENIX OPTICS TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products