Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1990-11-30
1992-06-23
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
356121, G01J 120
Patent
active
051245426
ABSTRACT:
A method suitable for determining piston in a segmented imaging assembly. The assembly preferably comprises a source of radiation that outputs a radiation beam; and, a segmented imaging system comprising a reference component and a test component, which components can be used to form an imaged radiation beam. The method comprises the steps of intercepting preselected portions of the imaged radiation beam with a mask, for masking at least one portion of at least one of the reference component and the test component, so that a portion of the imaged radiation beam incurs a predetermined and differential phase retardation, relative to another portion of the beam passing through the mask. These actions create a real time masked image. A step of comparing the real time masked image against a family of off-line images generated for a sequence of known petal position errors, can provide a determination of the magnitude of the real time test component piston.
REFERENCES:
patent: 4725138 (1988-02-01), Wirth et al.
patent: 5017004 (1991-05-01), Cross et al.
Eastman Kodak Company
Kaufman Stephen C.
Nelms David C.
LandOfFree
Method for quantitatively determining petal piston in a segmente does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for quantitatively determining petal piston in a segmente, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for quantitatively determining petal piston in a segmente will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-934630