Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2006-07-13
2008-12-09
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C250S201400, C359S381000, C359S368000
Reexamination Certificate
active
07462805
ABSTRACT:
The present invention provides a focus detection apparatus. In the focus detection apparatus, a luminous flux deformation member is provided to deform a sectional shape of a luminous flux emitted from a light source, and thereby a light quantity difference and a light intensity difference are decreased in light beams which are emitted to a sample surface and received by a photodetector even if objective lenses to be used are differ from each other in a pupil diameter. Consequently, the sample is irradiated with a single spot or multi spots to determine whether or not a focused state is obtained.
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Epps Georgia Y
Ko Tony
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
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