Optical: systems and elements – Having significant infrared or ultraviolet property – Having folded optical path
Reexamination Certificate
2007-11-27
2007-11-27
Amari, Alessandro (Department: 2872)
Optical: systems and elements
Having significant infrared or ultraviolet property
Having folded optical path
C359S859000, C355S053000
Reexamination Certificate
active
11453775
ABSTRACT:
Example embodiments are directed to an off-axis projection optical system including first and second mirrors that are off-axially arranged. The tangential and sagittal radii of curvature of the first mirror may be R1tand R1s, respectively. The tangential and sagittal radii of curvature of the second mirror may be R2tand R2s, respectively. The incident angle of the beam from an object point to the first mirror10may be i1, and an incident angle of the beam reflected from the first mirror10to the second mirror30is i2. The values of R1t, R1s, R2t, R2s, i1and i2may satisfy the following Equationin-line-formulae description="In-line Formulae" end="lead"?R1tcos i1=R2tcos i2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?R1s=R1tcos2i1in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?R2s=R2tcos2i2.in-line-formulae description="In-line Formulae" end="tail"?
REFERENCES:
patent: 5805365 (1998-09-01), Sweatt
patent: WO 2004/010200 (2004-01-01), None
Chang Seung-Hyuk
Kim Hoon
Kim Suk-Pil
Park Young-Soo
Song I-Hun
Amari Alessandro
Harness & Dickey & Pierce P.L.C.
Samsung Electronics Co,. Ltd.
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