Inventor
CLARKE DONALD A
CA16 patents
⚠️ This page may combine multiple inventors who share the name “CLARKE DONALD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DIFFRACTO LTD
15 patentsUS4920385AApr 24, 1990
Panel surface flaw inspection
DIFFRACTO LTD164 citations98
US4629319ADec 16, 1986
Panel surface flaw inspection
DIFFRACTO LTD221 citations98
US4863268ASep 5, 1989
Diffractosight improvements
DIFFRACTO LTD77 citations95
US4686374AAug 11, 1987
Surface reflectivity detector with oil mist reflectivity enhancement
DIFFRACTO LTD92 citations94
US4394683AJul 19, 1983
New photodetector array based optical measurement systems
DIFFRACTO LTD55 citations94
US5168322ADec 1, 1992
Surface inspection using retro-reflective light field
DIFFRACTO LTD31 citations92
US5004339AApr 2, 1991
Method and apparatus for determining physical characteristics of objects and object surfaces
DIFFRACTO LTD47 citations92
US4465374AAug 14, 1984
Method and apparatus for determining dimensional information concerning an object
DIFFRACTO LTD27 citations92
US4305661ADec 15, 1981
Method and apparatus for determining physical characteristics of objects and object surfaces
DIFFRACTO LTD43 citations92
US4585947AApr 29, 1986
Photodetector array based optical measurement systems
DIFFRACTO LTD29 citations91
US4907888AMar 13, 1990
Non destructive testing and other applications using retroreflective illumination
DIFFRACTO LTD15 citations81
US4326808AApr 27, 1982
Method and apparatus for determining physical characteristics of object outer surfaces
DIFFRACTO LTD19 citations80
US4506980AMar 26, 1985
Method and apparatus for determining physical characteristics of objects and object surfaces
DIFFRACTO LTD9 citations73
US5206700AApr 27, 1993
Methods and apparatus for retroreflective surface inspection and distortion measurement
DIFFRACTO LTD14 citations71
US5074661ADec 24, 1991
Methods and apparatus for retroreflective surface inspection and distortion measurement
DIFFRACTO LTD11 citations71