Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1994-03-30
1996-04-09
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
372 31, G01J 132
Patent
active
055064000
ABSTRACT:
In a scanning type probe microscope, a semiconductor laser LD is driven by a current having a value not more than an oscillation threshold value using a constant current circuit for weak light, and weak light is used to perform positional adjustment of the position of the laser beam on a cantilever.
REFERENCES:
patent: 4565197 (1986-01-01), Daly
patent: 5359434 (1994-10-01), Nakao et al.
Honma Akihiko
Watanabe Kazutoshi
Seiko Instruments Inc.
Steady Jacqueline M.
Westin Edward P.
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