Frequency-dividing self-mixing feedback-type non-contact He-Ne laser micrometer |
Title: |
Frequency-dividing self-mixing feedback-type non-contact He-Ne laser micrometer |
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Application Number: |
02120797 |
Application Date: |
2002/05/31 |
Announcement Date: |
2002/11/13 |
Pub. Date: |
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Publication Number: |
1379225 |
Announcement Number: |
1166914 |
Grant Date: |
2004-9-15 |
Granted Pub. Date: |
2004-9-15 |
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
G01B 9/02, H01S 3/223 |
Applicant(s): |
Tsinghua Univ |
Inventor(s): |
Zhang Shulian, Li Yan, Ding Yingchun |
Key Words: |
Frequency-dividing, self-mixing, feedback-type, non-contact, He-Ne laser, micrometer |
Abstract: |
A non-contact micrometer for measuring displacement, vibration, etc. is composed of a frequency splitting He-Ne laser device as light source, photoelctric detecting and signal processing unit and the object to be measured with feedback cavity and reflecting surface. The said laser device consists of laser discharging tube, reflector and dual-refracting element able to generate dual refraction effect in the laser cavity. Its advantages are simple structure, low cost, wide measuring range and high resolution up to 1/6. |
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