Optical: systems and elements – Mirror – Plural mirrors or reflecting surfaces
Reexamination Certificate
2006-02-21
2006-02-21
Cherry, Euncha P. (Department: 2872)
Optical: systems and elements
Mirror
Plural mirrors or reflecting surfaces
C359S850000, C359S857000, C359S858000, C359S861000
Reexamination Certificate
active
07001031
ABSTRACT:
The present invention discloses an image-forming optical system provided with a plurality of curved mirrors whereby two points at different distances are made to have an optically conjugate relationship, sequentially starting with a first conjugate point which is nearer when an optical path is traced from the first conjugate point to a second conjugate point which is farther, comprises, a first mirror which reflects luminous flux from the first conjugate point to transform the luminous flux into substantially parallel luminous flux, and a second mirror which reflects the luminous flux reflected by the first mirror while keeping the luminous flux substantially parallel. Further, the optical system satisfies the following condition:in-line-formulae description="In-line Formulae" end="lead"?|Arctan(1/2F)−|2×(ξ−η)||≦10[deg]in-line-formulae description="In-line Formulae" end="tail"?
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Cherry Euncha P.
Morgan L. Finnegan, L.L.P.
Pritchett Joshua L.
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