Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-01-22
2008-01-22
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S216000, C372S107000
Reexamination Certificate
active
11077023
ABSTRACT:
An apparatus and method for maintaining a desired position of a collimated light beam are provided. An optical system includes one or more passive optical elements movably positioned in the beam path. Beam position is responsive to movement of at least one of the passive optical elements. The actual position of the beam is detected and compared with the desired beam position. An error signal is generated and the beam path is altered responsive to movement of one or more of the passive optical elements. In further aspects, beam shaping optics, such diffractive optics, are provided to shape the sensed beam portion. In still other aspects, thermal conditions of the laser may be monitored and a thermal map is provided to automatically compensate for estimated beam drift due to thermal conditions.
REFERENCES:
patent: 5315111 (1994-05-01), Burns et al.
patent: 5489986 (1996-02-01), Magome et al.
patent: 5923418 (1999-07-01), Clark et al.
patent: 6002706 (1999-12-01), Staver et al.
patent: 6669803 (2003-12-01), Kathman et al.
patent: 2003/0164996 (2003-09-01), Popovich et al.
patent: 2006/0092406 (2006-05-01), Lizotte
Pacific Silicon Sensor, Inc., DL-400-7-KER 4..1 pin Position Sensing Photodiodes brochure, date unknown.
Pacific Silicon Sensor, Inc., DL100-7PCBA3 brochure, date unknown.
Hamamatsu Photonics K.K., PSD (Position Sensitive Detector), brochure No. KSPD0001E01 (Jul. 2003).
Hamamatsu Photonics K.K., Profile Sensor S9132, brochure No. KSP-0002 (Feb. 25, 2003).
Hamamatsu Photonics K.K., One-Dimensional PSD S3979, S3931, S3932, S1352, S3270, brochure No. KSPD1002E03 (Aug. 2004).
Lizotte Todd E.
Ohar Orest P.
Hitachi Via Mechanics Ltd.
McLane, Graf, Raulerson & Middleton, PA
Pyo Kevin
Rand Scott C.
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