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Displacement self-sensing HeNe laser system with cats eye as endoscope

A laser, self-sensing technology, applied in the field of laser displacement sensing, can solve the problem of time-consuming and laborious adjustment

Inactive Publication Date: 2004-11-17
TSINGHUA UNIV
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Problems solved by technology

Therefore, it is more time-consuming to adjust

Method used

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  • Displacement self-sensing HeNe laser system with cats eye as endoscope
  • Displacement self-sensing HeNe laser system with cats eye as endoscope
  • Displacement self-sensing HeNe laser system with cats eye as endoscope

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Embodiment Construction

[0014] The principle structure of the displacement self-sensing HeNe laser system with the cat's eye as cavity mirror can be found in the present invention figure 1 . Concave output mirror 01, laser gain tube 02 and cat's eye 03 (composed of convex lens 04 and concave reflection 05) form a half-cavity HeNe laser. The cat's eye 03 is fixedly connected on the measuring rod 06. When the measured object 07 moves to the left, the spring 08 presses the right end of the measuring rod 06 against the measured object 07 to ensure that the displacement of the measured object 07 is completely transferred to the cat's eye 03. When the measured object 07 moves, the measuring rod 06 is pushed, and the measuring rod 06 pushes the cat's eye 03 to move, and the laser cavity length (that is, the distance between the concave output mirror 01 and the concave mirror 05) changes. There is an anti-reflection window 09 at the right end of the laser gain tube 02, and its left and right light-transmi...

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Abstract

The invention is a kind of shift self-sensing HeNe laser system which uses cats eye, the invention belongs to laser shift sensor technology, the character lies in: it is made up of convex lens and concave mirror, the interval between the convex lends and the concave mirror uses adjustable cats eye to replace the reflecting mirror in the half-intracavity, the cats eye is connected to a side pole which can move on the track; the double-deflection element in the half-intracavity is a reflection reducing window on whose two limiting surfaces there coated with reflection reducing coating on one port of the discharging tube, there also has a reinforcing ring on the window. The laser can realize that the proportion of the vertical model interval and the emitting band can reach 4:3, and the laser power can maintained stable when the cats eye is in moving, avoids the failure of the laser cavity, maintains the system work normally in a large measuring range.

Description

technical field [0001] A displacement self-sensing HeNe laser system using a cat's eye as a cavity mirror belongs to the technical field of laser displacement sensing. Background technique [0002] The Chinese patent "Displacement Self-sensing HeNe Laser System and Its Implementation Method" (ZL 199103514.3) comprehensively utilizes several laser physical phenomena, such as laser frequency splitting phenomenon, laser mode competition phenomenon, laser power tuning phenomenon, etc., to convert an ordinary HeNe laser It is transformed into a relatively simple displacement sensing instrument which does not utilize the interference phenomenon but has the function of self-calibration. The method has a displacement measurement resolution of λ / 8 (λ / 8 is 79 nm for a HeNe laser with a wavelength of 0.6328 μm). The main structure of this invention is a common semi-cavity HeNe laser, and one of its two reflective cavity mirrors is fixedly connected on a linear guide rail (measuring ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02H01S3/08H01S3/223
Inventor 张书练杜文华李岩
Owner TSINGHUA UNIV
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