LASER

Japanese Patent JP3644145

B2

PROBLEM TO BE SOLVED: To enhance accuracy in cutting or measurement by varying the curvature of a total reflector and the diameter of an aperture on a boring means, thereby stabilizing the laser light condensing characteristics.
SOLUTION: Curvature of a total reflector 3 is varied by pressing a convex mirror. Consequently, the propagation characteristics of beam are varied and constant beam characteristics {diameter of incident beam, order of mode (condensing characteristics), etc.} are obtained at the position of a condensing means 6 by changes in the curvature of the total reflector 3. When the curvature of the total reflector 3 is varied, the characteristics of a beam generated in a laser oscillator 1 are varied simultaneously and the relationship between the diameter of aperture &phiv at the position of a boring means 4 and the beam radius ω upon generation of single mode is also varied. In order to sustain a constant value of &phiv /ω by a central processing unit 13 according to the variation in the curvature of the total reflector 3, a signal for varying the diameter of aperture is delivered to the boring means 4. According to the arrangement, condensing characteristics of laser light are stabilized and the cutting or measurement accuracy can be enhanced.

Satoshi Nishida
Takeshima Shigeto

JP21994696A

April 27, 2005

August 21, 1996

Click for automatic bibliography generation  

Mitsubishi Electric Corporation

G01B11/00; B23K26/00; H01S3/08; H01S3/105; H01S3/106; H01S3/136; H01S3/139; (IPC1-7): H01S3/139; H01S3/136

JP4167990A
JP4026817A
JP2158182A
JP5084587A
JP4026177A
JP2174283A
JP62165985A
JP64066090A
JP61078183A
JP1070370U
JP63105369U

Shogo Takahashi
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka

Previous Patent: NONLINEAR ARITHMETIC UNIT AND NEURAL NETWORK

Next Patent: METHOD AND DEVICE FOR TWO DIMENSIONAL SPATIAL CONVERSION OF PICTURE