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US 4,537,478 AGranted
Apodized mirror optical system
OwnerThomas A. Richterinventor
Life of this patent
Estimating the term…
Abstract
An optical system for producing substantially uniform illumination at an exposure plane has an apodized mirror in the form of a plurality of petals which can be individually adjusted to permit illumination intensity adjustment at the focal plane.
Claims14
An optical system comprising:
- a lamp, a reflector positioned with respect to said lamp to provide a beam of illumination;
- a petal mirror on the path of said beam to reflect the beam;
- a collimating mirror on the path of the reflected beam;
- an exposure plane, said collimating mirror directing the reflected beam toward the exposure plane as a collimated beam, said petal mirror being adjusted so as to provide substantially uniform illumination intensity across said exposure plane.
1 more element
An apodized mirror optical system comprising:
- a lamp, a reflector positioned with respect to said lamp to provide a first beam;
- an apodizing petal mirror positioned on the path of said first beam to reflect only a portion of said first beam to provide a second beam, said petal mirror being positioned to reflect substantially all of the interior of said first beam and not reflect the outer fringes of said first beam to said second beam;
- a mirror positioned on the path of said second beam, an exposure plane, said mirror producing a collimated beam directed toward said exposure plate, said petal mirror having a plurality of individual petals which can be individually adjusted so as to provide substantially uniform distribution of illumination intensity across said exposure plane.
Dependencies are inferred from the claim text.