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

an imaging lens

An imaging lens and lens technology, which is applied in the field of imaging lenses, can solve the problems of being unable to meet the requirements of small size and portability, the difficulty of processing glass lenses, and increasing the cost of the lens, and achieve the effect of small size and portability, good imaging quality, and simple and compact structure

Active Publication Date: 2016-09-07
BYD SEMICON CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultra-wide-angle lenses currently on the market have more than three lenses and glass lenses, which cannot meet the requirements of small and light weight and are expensive. At the same time, some glass lenses in the lens are difficult to process and have a low production yield. Further increase the cost of the 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
  • an imaging lens
  • an imaging lens
  • an imaging lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment proposes relevant parameters of the imaging lens, specifically as follows:

[0038] Table 1 Mirror parameters

[0039] Types of

Radius of curvature (R)

Quadratic coefficient (k)

Thickness (dmm)

first surface

14.613603

1.459338

1.2

second surface

1.023175

-0.95436

1.52

third surface

2.748772

0.72859

2.31

fourth surface

-5.474828

-64.319964

0.43

aperture

\

0

0.2

fifth surface

69.943739

0

1.64

sixth surface

-1.378584

-1.472776

0.2

filter

\

0

0.85

[0040] Table 2 Aspheric Coefficient Parameters

[0041] Types of

first surface

second surface

third surface

fourth surface

fifth surface

sixth surface

a2

0

0

0

0

0

0

a4

-2.937939E-3

0.020256

6.311626E-4

6.786837E-3

-0.056107

-0.015419

a6

8.417636E-5

-4.244757E-3

1.26...

Embodiment 2

[0056] This embodiment proposes relevant parameters of the imaging lens, specifically as follows:

[0057] Table 3 lens parameters

[0058] Types of

Radius of curvature (R)

Quadratic coefficient (k)

Thickness (dmm)

first surface

13.050213

1.455594

1.05

second surface

1.026822

-0.913927

1.51

[0059] third surface

2.691879

0.614648

2.10

fourth surface

-5.954721

-128.118817

0.53

aperture

\

0

0.19

fifth surface

-13.068876

0

1.35

sixth surface

-1.279495

-1.234433

0.05

filter

\

0

0.85

[0060] Table 4 Aspheric Coefficient Parameters

[0061] Types of

first surface

second surface

third surface

fourth surface

fifth surface

sixth surface

a 2

0

0

0

0

0

0

a 4

-2.922636E-3

0.02816

8.904078E-3

-1.025773E-3

-0.023701

-0.026325

a 6

8.41584...

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 imaging lens. The imaging lens comprises a first lens, a second lens and a third lens, which are coaxial and are successively arranged from an object space to an image space. The first lens is a convex-concave aspherical lens which has negative refractive power, and the convex side of the first lens faces the object space. The second lens is a biconvex aspherical lens having positive refractive power. The third lens is an aspherical lens having positive refractive power, and one surface facing the image space is a convex side. The lens provided by the invention also satisfies: |f / f1| is greater than 0.4 and is less than 0.9, wherein focal length of the lens is f and focal length of the first lens is f1. The imaging lens provided by the invention adopts the design of three lenses. The structure of the imaging lens is simple and compact. Volume of the lens can be reduced effectively. Present market requirements on small size and lighting are met. Meanwhile, the imaging lens has large angle of visual field and good imaging quality.

Description

technical field [0001] The invention relates to an optical device, in particular to an ultra-wide-angle imaging lens. Background technique [0002] Wide-angle lenses are extremely important components in surveillance devices, special photography devices, and vehicle parking devices. The ultra-wide-angle lenses currently on the market have more than three lenses and glass lenses, which cannot meet the requirements of small size and light weight and are expensive. At the same time, some glass lenses in the lens are difficult to process and have a low production yield. Further increase the cost of the lens. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome one of the above existing problems and provide an imaging lens with a large viewing angle, better optical performance and a simple structure. [0004] The present invention provides an imaging lens, which is characterized in that it includes a first lens, a secon...

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): G02B13/06G02B13/18G02B1/04
Inventor 孟庆涛
Owner BYD SEMICON CO LTD