Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Optical record carrier scanning apparatus providing optoelectronic positioning of the scanning spot

Optical record carrier scanning apparatus providing optoelectronic positioning of the scanning spot

US Patent 4918679 · Granted Apr 17, 1990

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Objective lens and scanning device using such an objective lens2000
Presentation system with overhead projector1999
Optical scanning device using a plurality of scanning spots1998
Optical unit having a radiation source, a detector and a grating, and scanning d1998
Optical scanner having symmetry about an oblique divider1996
Optical recording and/or reproducing apparatus with optical sensing of scanning 1993
Planar optical scanning head having deficiency-correcting grating1993
Optical device determining the position and orientation of an object, and optica1993
Planar optical scanning head with concentric diffraction gratings1992
Device for optically scanning an information plane detecting border portions of 1992
Three element grating objective and grating-beam shaper, and optical scanning de1991
Optical scanning device including mirror objective having two windows at least o1991