Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1989-02-21
1991-01-15
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
350 64, 250234, 250235, G01B 1100, H01G 314, G02B 2608
Patent
active
049848925
ABSTRACT:
A spherical space, especially a hemispherical space, is scanned by an optical scanner for the presence of a target in the scanned spaced. The optical scanner includes an objective lens (4) which scans the space through an optical deflector (1 or 7) arranged upstream of the objective lens and rotatable about two axes, one of which is the optical axis (2, 3) of the objective lens. At least one tiltable prism (5) is arranged downstream of the objective lens (4). At least one row of sensors (6) is arranged downstream of the prism (5) for converting received optical signals into respective electrical signals which are processed under control of a central processing unit (CPU) including a computer and memory (21). Drives (9, 16) controlled by the CPU rotate the deflectors (1 or 7) about the two axes (2, 3) extending perpendicularly to each other. The imaging speed at which an image passes the detector row (6) is always constant independently of the instantaneous viewing or scanning direction.
REFERENCES:
patent: 4246612 (1981-01-01), Berry et al.
Fasse W. G.
Kane, Jr. D. H.
Messerschmitt-Boelkow-Blohm GmbH
Pham Hoa
Rosenberger Richard A.
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