Optical: systems and elements – Compound lens system
Patent
1998-10-15
2000-04-04
Spyrou, Cassandra
Optical: systems and elements
Compound lens system
359363, 359364, 359381, 3562371, 351219, G02B 906, G02B 2136, G02B 2100
Patent
active
060468432
ABSTRACT:
An optical element for microscopic inspection of a surface. The optical element has an elongated body defining an optical axis, with a first end adjacent the surface and a second end directed toward an imaging instrument. The body has a curved reflective surface and an optical aperture at the first end, and defines first and second associated focal points on the optical axis. The first focal point is spaced apart from the first end of the body, such that positioning the surface at the first focal point generates an image of the surface at the second focal point. The reflective surface may be paraboloidal, with a concentrating lens focusing collimated rays to the second focal point, so that a conventional microscope may view the image generated at the second point.
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Yakubenas et al, Sov. J. Opt. Tech., 38, No. 1, Jan. 1971.
Assaf Fayez
Hewlett--Packard Company
Spyrou Cassandra
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