Fisheye lens

A fisheye lens and lens technology, applied in the direction of optical components, optics, instruments, etc., can solve problems such as difficult to meet the growing demand, and achieve the effect of high-quality imaging quality and large field of view

Pending Publication Date: 2020-04-28
DONGGUAN YUTONG OPTICAL TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing optical structure is difficult to meet the growing demand

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
  • Fisheye lens
  • Fisheye lens
  • Fisheye lens

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Considering the preparation process and mass production requirements of the fisheye lens, in the embodiment of the present invention, optionally, the first lens is a spherical lens, and the second lens, the fourth lens, the fifth lens, and the sixth lens are aspheric lenses, The third lens is a spherical lens or an aspheric lens. Wherein, on the basis of using a glass lens for the first lens, setting it as a spherical lens is more convenient for preparation and mass production.

[0042] Specifically, optionally, the surface of the lens adjacent to the object plane side is the object side surface, and the surface of the lens adjacent to the image surface side is the image side surface; the object side surface of the first lens 11 is a convex surface, and the image side surface is a concave surface; the object surface of the second lens 12 The side is concave, and the image side is convex; the object side of the third lens 13 is convex, and the image is convex; the object...

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 embodiment of the invention discloses a fisheye lens. The fisheye lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis. The first lens, the fourth lens and the sixth lens have negative focal power. The second lens, the third lens and the fifth lens have positive focal power. The focal length of the fisheye lens is f, the focal length of the first lens is f1, and the focal lengths of the first lens and the fisheye lens meet the relationalexpression: 0.8 < |f1 / f| < 2.0. According to the embodiment of the invention, the focal power proportion is reasonably distributed and the focal length range of the first lens is set, so that high imaging quality can be obtained while the requirements of large field angle, large target surface and miniaturization are met, the characteristics of small system length and large effective image surfacecan also be met, the day-night confocal function is realized, and the resolution is ensured to meet the imaging requirement when the system is used in an environment of -40 DEG C to 80 DEG C.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of optical imaging, and in particular to a fisheye lens. Background technique [0002] Ultra-wide-angle lenses have been widely used in security, vehicle, access control and other fields in recent years because they can achieve all-round shooting without dead angles. With market applications, new requirements for lenses are put forward, and the demand for effective image planes is increasing. The distortion of the lens The requirements are getting smaller and smaller, and the size of the lens is also getting smaller and smaller. With the development of the security industry, the application of monitoring equipment is becoming more and more extensive, and the requirements for the shooting range of the optical system are also increasing. The existing optical structure is difficult to meet the growing demand. Contents of the invention [0003] The invention provides a fisheye lens to me...

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 Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18
Inventor 米士隆张占军金永红韩妮刘创标
Owner DONGGUAN YUTONG OPTICAL TECH
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