Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1996-08-26
1998-09-29
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
2505593, 356400, G01B 1100
Patent
active
058148264
ABSTRACT:
A method and apparatus for precisely aligning two photo printing plates with each other by placing a light emitting laser diode on one side of one of the photoprinting plates and a photo diode that provides coordinate information on the other photoprinting plate so that when the laser beam from the laser emitting diode is directed through the photoprinting plates to the photo diode, the coordinate information on excited point on the photo diode can be compared to a reference signal to generate a control signal to activate motors that position the photoprinting plates in the proper position with respect to each other.
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Hamann Lutz
Kettner Gunter
Schuldt Dietmar
Thoms Roland
Demminer Maschinen Technik GmbH
Lee John R.
Westin Edward P.
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