Laser self-mixing interference measuring system

A self-mixing interferometry and measurement system technology, applied in the field of laser self-mixing interferometry systems, can solve problems such as inability to achieve measurement

Inactive Publication Date: 2016-04-13
SHANGHAI TRUELAND INFORMATION & TECH CO LTD
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the measurement method based on laser self-mixing interference is highly dependent on the reflectivity of the measured object. If the reflectivity of the object is low, the measurement cannot be realized; if the displacement direction of the object is to be determined, the interference fringes must be able to form a sawtooth wave. The object under test is required to have a sufficient level of optical feedback

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
  • Laser self-mixing interference measuring system
  • Laser self-mixing interference measuring system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to figure 1 , a laser self-mixing interferometry system provided by an embodiment of the present invention, comprising:

[0036] laser 10;

[0037] A coupler 11 having a first port, a second port and a third port, the first port of the coupler 11 is connected to the output end of the laser 10;

[0038] a measureme...

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 discloses a laser self-mixing interference measuring system, which comprises a laser, a coupler, a measurement channel, a reflector and a photoelectric detector, wherein the coupler has a first port, a second port and a third port; the first port of the coupler is connected with the output end of the laser; the measurement channel is connected with the second port of the coupler and is used for detecting a measured object; the reflector is arranged at the third port of the coupler and is used for controlling the feedback light; and the photoelectric detector is used for detecting the output power of the laser. According to the laser self-mixing interference measuring system, active control of the feedback light is realized through the reflector, so that control of waveform of the output power of the laser can be realized, measurement requirement is reached, measurement precision can be improved favorably, and measurement range is enlarged. The measuring system, with the advantages of a laser self-mixing interferometer and optical fiber transmission being combined, is simple in structure, small in size, capable of realizing miniaturized sensing detection and wide in application range.

Description

technical field [0001] The invention relates to the technical field of laser measurement, in particular to a laser self-mixing interference measurement system. Background technique [0002] There is a common but extremely important phenomenon in the application of laser systems - optical feedback. The so-called optical feedback phenomenon refers to the phenomenon that after the laser output light is reflected or scattered by external objects, part of the light is fed back to the laser resonator. Optical feedback will seriously affect the output characteristics of lasers. Therefore, for the application system using lasers as light sources, researchers initially focused on how to eliminate the adverse effects of optical noise, spectral line broadening, and coherent quenching caused by optical feedback. With the deepening of the research, the researchers found that the feedback light carried the information of the external object, so they began to actively study how to use the...

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): G01B9/02
CPCG01B9/02092
Inventor 杨明伟
Owner SHANGHAI TRUELAND INFORMATION & TECH CO LTD
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