1
Donald A Clarke, Rodger L Reynolds, Timothy R Pryor: Panel surface flaw inspection. Diffracto, Larson and Taylor, December 16, 1986: US04629319 (121 worldwide citation)

This invention relates to electro-optical sensing of form type and other defects on surfaces such as sheet metal or plastic panels. Method and apparatus are disclosed for detection and quantification of defects such as dents, creases, low spots, flat spots, etc. which are a result of the manufacturi ...


2
Donald A Clarke, Rodger L Reynolds, Timothy R Pryor: Panel surface flaw inspection. Diffracto, Larson and Taylor, April 24, 1990: US04920385 (70 worldwide citation)

This invention relates to electro-optical sensing of form type and other defects on surfaces such as sheet metal or plastic panels. Method and apparatus are disclosed for detection and quantification of defects such as dents, creases, low spots, flat spots, etc. which are a result of the manufacturi ...


3
Donald A Clarke, Rodger L Reynolds, Timothy R Pryor: Surface inspection using retro-reflective light field. Diffracto, Larson and Taylor, December 1, 1992: US05168322 (25 worldwide citation)

This invention relates to an electro-optical technique which senses form type and other defects on surfaces such as sheet metal or plastic panels. Method and apparatus are disclosed for allowing the inspection of the entire surface of interest from a single point of view while reducing the complexit ...


4
Donald A Clarke, Rodger L Reynolds, Timothy R Pryor: Non destructive testing and other applications using retroreflective illumination. Diffracto, Larson and Taylor, March 13, 1990: US04907888 (8 worldwide citation)

The invention concerns optical non-destructive test of materials using surface distortions detected by light which is reflected from the surface, retroreflected back to the surface and thence to form an image containing a greatly enhanced view of local deformation. In addition, the method is usable ...