Title:
REFINED OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO2008076444
Kind Code:
B1
Abstract:
Selected scene regions are imaged. IMAGING CHANNEL: mirrors (preferably MEMS) address an imaging sensor to regions. CALIBRATION CHANNEL: the mirrors direct radiation from a source to a calibration sensor, along an imaging -channel segment. Beam splitter (s) let the channels share optical path at the mirrors. To minimize imaging- channel diffractive blur, the calibration channel modifies wave front angle and smoothness at the mirrors - measuring (and setting mirrors to optimize) PSF sharpness, then applying these measurements (and settings) to optimize imaging-channel settings by iterative multidi-mensional gradient search. An afocal lens receives scene radiation, magnifying deflection at the scene. An FOR is imaged on the imaging sensor; the mirrors address the sensor to a narrow FOV within the FOR; the lens enlarges deflections to cover the FOR. Plural diffraction- grating orders communicate between calibration source and sensor when the selected region is in plural scene portions, regardless which FOV is addressed.
More Like This:
Inventors:
CAMPION DAVID (US)
DWORK NICHOLAS (US)
KANE DAVID (US)
POHLMAN MATTHEW (US)
POTTER RANDALL (US)
DWORK NICHOLAS (US)
KANE DAVID (US)
POHLMAN MATTHEW (US)
POTTER RANDALL (US)
Application Number:
PCT/US2007/025912
Publication Date:
August 21, 2008
Filing Date:
December 17, 2007
Export Citation:
Assignee:
ARETE ASSOCIATES (US)
CAMPION DAVID (US)
DWORK NICHOLAS (US)
KANE DAVID (US)
POHLMAN MATTHEW (US)
POTTER RANDALL (US)
CAMPION DAVID (US)
DWORK NICHOLAS (US)
KANE DAVID (US)
POHLMAN MATTHEW (US)
POTTER RANDALL (US)
International Classes:
G01J9/00; G01S7/497; G01S17/42; G01S17/89; G02B26/08
Download PDF: