Method of picking up sectional image of laser light

Details Method of picking up sectional image of laser light Method of picking up sectional image of laser light

2007-01-02

2007-01-02

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S201200, C250S201300

Reexamination Certificate

active

11178562

ABSTRACT:
A knife edge is disposed at a height corresponding to a section on which a sectional image (light intensity distribution) is picked up in such a manner as to intercept a part of the section of the laser light. The knife edge is irradiated with the laser light, and the sectional image of the laser light is enlarged with an image forming optics, and is picked up by a CCD. While picking up the sectional image in this manner, focusing of the image forming optics is performed. Next, the knife edge is retracted from the optical path of the laser light, the laser light is allowed to enter the CCD via the image forming optics, and the sectional image of the laser light is picked up.

REFERENCES:
patent: 4687916 (1987-08-01), Emoto et al.
patent: 5828500 (1998-10-01), Kida et al.
patent: 6005838 (1999-12-01), Fan et al.
patent: 6717124 (2004-04-01), Atkinson et al.

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