Optics: measuring and testing – Range or remote distance finding – Triangulation ranging to a point with one projected beam
Patent
1993-05-04
1995-05-23
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
Triangulation ranging to a point with one projected beam
348139, 348146, 3561411, G01C 300, G01B 1126
Patent
active
054186080
ABSTRACT:
A system for three dimensional mapping of a submarine surface includes (a) a light source for projecting a beam of collimated light that is reflective from the submarine surface including a laser of confined cross-sectional area, (b) a scanning unit to intercept the beam and project it in a first direction onto a selected area of the surface as a raster of pixels each at controlled X and Y coordinates of said surface and produce a reflection of the raster in a second direction, (c) a scanner processor to control the X and Y coordinates, (d) a compound lens capable of intercepting the raster reflection and focusing it as a scan image on a reception plane offset spatially from the scanning unit, (e) a position sensitive detector having a planosurface positioned substantially on the reception plane to sense the scan image and convert each pixel of the reflected raster into a pair of differential currents corresponding to the X and Y coordinates of the each pixel at said reception plane, (f) a signal processor to calculate from the differential currents range value voltages for the pixels, and (g) graphic display unit to convert the range value voltages into a visual representation of the scanned surface.
REFERENCES:
patent: 3604803 (1971-09-01), Kahn
patent: 4935616 (1990-06-01), Scott
patent: 5114226 (1992-05-01), Goodwin et al.
patent: 5200793 (1993-04-01), Ulich et al.
patent: 5270780 (1993-12-01), Moran et al.
patent: 5323223 (1994-06-01), Hayes
Caimi Frank M.
Smith David C.
Buczinski Stephen C.
Harbor Branch Oceanographic Institution Inc.
Pulmer Carroll F.
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