Inventor
VELZEL CHRISTIAAN H F
NL8 patents
⚠️ This page may combine multiple inventors who share the name “VELZEL CHRISTIAAN H F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PHILIPS CORP
5 patentsUS4850673AJul 25, 1989
Optical scanning apparatus which detects scanning spot focus error
PHILIPS CORP46 citations90
US4800547AJan 24, 1989
Optical record carrier scanning apparatus with scanning beam focus error detection
PHILIPS CORP26 citations90
US4427261AJan 24, 1984
Optical transmission system having reduced modal noise
PHILIPS CORP9 citations73
US5144131ASep 1, 1992
Device for optically scanning an information plane detecting border portions of light beam
PHILIPS CORP7 citations72
US5512760AApr 30, 1996
Optical height detector with coaxial irradiation and image axes and plural detectors spaced along the image axis
PHILIPS CORP9 citations71