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

Iris recognition optical system and electronic equipment with same

An optical system, iris recognition technology, applied in optics, optical components, character and pattern recognition, etc., can solve the problem of increasing the size of the iris recognition system

Pending Publication Date: 2020-11-17
杭州照相机械研究所有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Iris recognition is widely used in identification electronic devices such as attendance machines. Such devices often require the iris system to have a large field of view, which will inevitably increase the size of the iris recognition system

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
  • Iris recognition optical system and electronic equipment with same
  • Iris recognition optical system and electronic equipment with same
  • Iris recognition optical system and electronic equipment with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: The lens design parameters and the aspheric coefficients of the iris recognition optical system of an embodiment are as shown in Table 2 and Table 3. In this embodiment, the field curvature and distortion curve of the optical system are as follows figure 2 as shown in:

[0058] F=2, EFFL=4.318mm, field of view is 70°

[0059]

[0060]

[0061] Table 2 lens design parameter table (embodiment 1)

[0062]

[0063]

[0064] Table 3 aspheric coefficient table (embodiment 1)

Embodiment 2

[0065] Embodiment 2: The lens design parameters and the aspheric coefficient of the iris recognition optical system of another kind of implementation are as shown in table 4 and table 5, in this embodiment, the field curvature and distortion curve of optical system are as follows image 3 as shown in:

[0066] F=1.89795, EFFL=4.4mm, field of view is 70°

[0067] serial number Surf: Type Radius Thickness Material k 0 STANDARD Infinity Infinity 1 STANDARD Infinity 0.25132 BK7 2 STANDARD Infinity 0.50129 3 STANDARD Infinity -0.46539 4 EVENASPH 1.75787 0.67243 APL5014CL 6.73987E-01 5 EVENASPH 23.11873 0.10882 8.44613E+01 6 EVENASPH 29.06185 0.30137 EP6000 2.77709E+02 7 EVENASPH 3.04723 0.39547 -8.27458E+00 8 EVENASPH 10.27483 0.64246 APL5014CL 3.45397E+01 9 EVENASPH -15.44858 0.53455 -3.20947E+01 10 EVENASPH -4.05842 0.60092 APL5014CL ...

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 relates to the technical field of biological feature recognition systems, in particular to an iris recognition optical system and electronic equipment with the same. The optical system comprises a near-infrared narrow-band optical filter, a first lens with positive focal power, an aperture diaphragm arranged on the first lens, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with negative focal power which are sequentially arranged from the object side to the image side in the optical axis direction. The near-infrared narrow-band optical filter enables the lens with the optical system to have a large field angle, the imaging resolution is high and sharpness is good under near-infrared light irradiation, later image recognition and processing are facilitated, particularly, when the optical filter is arranged in front, the requirement for the large field angle can be met without large size of the optical filter, and the volume size of the lens with the optical system can be reduced.

Description

technical field [0001] The invention relates to the technical field of biological feature recognition systems, in particular to an iris recognition optical system and electronic equipment with the same. Background technique [0002] Biometrics (including fingerprints, faces, irises, gait, DNA, etc.) in the era of artificial intelligence are more convenient to collect, more accurate to identify, safer to prevent counterfeiting, and more widely used. Identity identification for payment, examination, medical treatment and other daily affairs. New information security technologies, new applications, and new industries based on biometric identification will become a new driving force for social progress and human civilization. [0003] Traditional password authentication and ID number authentication modes are more and more vulnerable to attacks, such as using forged ID cards, or using password cracking tools for password cracking, and password information is easy to forget, thes...

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): G02B13/00G02B13/06G02B13/14G02B13/18G02B5/20G06K9/00
CPCG02B13/0045G02B13/06G02B13/18G02B13/14G02B5/208G06V40/19
Inventor 谢念吴登富喻玺
Owner 杭州照相机械研究所有限公司