Inventor
KESSELS HENRICUS M M
NL7 patents
⚠️ This page may combine multiple inventors who share the name “KESSELS HENRICUS M M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PHILIPS CORP
6 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
US4431267AFeb 14, 1984
Optical system which provides a collimated light beam
PHILIPS CORP36 citations89
US5144131ASep 1, 1992
Device for optically scanning an information plane detecting border portions of light beam
PHILIPS CORP7 citations72
US4776670AOct 11, 1988
Optical assembly
PHILIPS CORP8 citations72
US4808003AFeb 28, 1989
Arrangement for optically measuring the profile of a radiation reflecting surface
PHILIPS CORP6 citations60