초록 ▼

An optical inspection system for determining various features of, for example, painted surfaces, by analyzing light reflected from the surface in a plurality of ways. In one case the cross sectional diameter of a beam of radiation, which gives information regarding the surface, is measured by passin

An optical inspection system for determining various features of, for example, painted surfaces, by analyzing light reflected from the surface in a plurality of ways. In one case the cross sectional diameter of a beam of radiation, which gives information regarding the surface, is measured by passing the beam through a filter means (104) having transmissive and absorptive portions (107,108), the arcuate width at each radial distance from the optical axis (100) being such that there is a predetermined relationship between the diameter of the beam and the mount of radiation passed by the filter.

대표청구항 ▼

Apparatus for separating specular from diffuse radiation from an area of a surface under inspection, comprising means for passing radiation to said surface, retroreflective means positioned with respect to said surface for reflecting radiation from said surface back to said surface, focusing means f

Apparatus for separating specular from diffuse radiation from an area of a surface under inspection, comprising means for passing radiation to said surface, retroreflective means positioned with respect to said surface for reflecting radiation from said surface back to said surface, focusing means for receiving radiation from said surface, and filter means having a first central area on its optical axis and a second surrounding area, said filter means and the area of said surface under examination being conjugate with respect to the focusing means whereby all of said diffuse radiation from said area of said surface under inspection is passed to said central area of said filter means and specular radiation from said area of said surface under inspection is passed to said second surrounding area so that said specular and said diffuse radiation are separated.