Unlock instant, AI-driven research and patent intelligence for your innovation.

Ultra-wide-angle lens

An ultra-wide-angle lens and lens technology, applied in the field of ultra-wide-angle lens, can solve the problems of high cost, unsatisfactory field of view, and large number of lenses.

Active Publication Date: 2013-05-29
BYD SEMICON CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional ultra-wide-angle lens has a large number of lenses and high cost, and its field of view cannot meet the needs of current imaging devices

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
  • Ultra-wide-angle lens
  • Ultra-wide-angle lens
  • Ultra-wide-angle lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a schematic diagram of the first embodiment of the ultra-wide-angle lens of the present invention; please refer to figure 1 , The ultra-wide-angle lens of the embodiment of the present invention includes a first lens group 1, a second lens group 2, an aperture 3, and a plate glass 4.

[0025] The first lens group 1 includes, from the object side, a first lens 11 with negative refractive power and a concave surface on the image side toward the object side, and a second lens 12 with negative refractive power and a concave surface on the image side toward the object side. A third lens 13 with a positive refractive power and a convex surface on the object side; the second lens group 2 includes a biconvex fourth lens 21 with positive refractive power and a biconvex fourth lens 21 with positive refractive power in order from the object side. Five lens 22. The diaphragm 3 is located between the first lens group 1 and the second lens group 2; the plate glass 4 is lo...

Embodiment 2

[0046] Figure 7 It is a schematic diagram of the structure of Example 2 of the ultra-wide-angle lens of the present invention; please refer to Figure 7 , The ultra-wide-angle lens of the embodiment of the present invention includes a first lens group 100, a second lens group 200, a diaphragm 300 and a flat glass 400.

[0047] The first lens group 100 includes a first lens 110 with negative refractive power and a concave surface on the image side toward the object side, and a second lens 120 with negative refractive power and a concave surface on the image side toward the object side. A third lens 130 with positive refractive power and a convex surface on the object side; the second lens group 200 includes a biconvex fourth lens 210 with positive refractive power and a biconvex fourth lens 210 with positive refractive power in order from the object side. Five lenses 220. The diaphragm 300 is located between the first lens group 100 and the second lens group 200; the plate glass ...

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 provides an ultra-wide-angle lens comprising a first lens group, a second lens group and a diaphragm. The first lens group sequentially comprises a first lens, a second lens and a third lens from an object space side, wherein the first lens and the second lens have negative refraction and form the dent from the image space side surface to the object space, the third lens has positive refraction and forms the convex from the object space side surface to the image space, the second lens group sequentially comprises a dual-convex fourth lens with positive refraction and a dual-convex fifth lens with positive refraction from the object space side, the diaphragm is arranged between the first lens and the second lens, wherein the lens system meets the following conditions: f1 is smaller than 0, the absolute value of f1 / f is larger than 1.4; f2 is larger than 0, and the absolute value of f2 / f is larger than 1.1 and smaller than 1.5, and L / f is smaller than 10; f1 is the effective focus of the first lens group, f2 is the effective focus of the second lens group, f is the effective focus of the whole lens system, and L is the whole length of the lens system. The ultra-wide-angle lens of the invention has the advantage of compact structure.

Description

Technical field [0001] The invention belongs to the technical field of optical devices, and specifically relates to an ultra-wide-angle lens. Background technique [0002] Modern imaging devices have been widely used in various fields. When imaging devices are used in certain specific fields, ultra-wide-angle lenses are required to increase the field of view. The ultra-wide-angle lens is an important component of some large field of view camera devices, such as monitoring devices, the recent popularity of car rearview mirrors and so on. The imaging performance of the lens and the size of the field of view determine the pros and cons of the ultra-wide-angle lens. Therefore, the performance and field of view of the lens have become important considerations for designing an ultra-wide-angle lens. The traditional ultra-wide-angle lens has a large number of lenses and high cost, and its field of view cannot meet the needs of current imaging devices. Summary of the invention [0003]...

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): G02B13/06G02B1/00
Inventor 姜莉莉
Owner BYD SEMICON CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com