CONTACTLESS METHOD AND DEVICE FOR DETERMINING SURFACE QUALITY Russian patent published in 2005 - IPC

FIELD: measuring engineering.

SUBSTANCE: method comprises receiving mirror and diffuse components of light radiation reflected from the surface, extracting pulses of the same duration from the components received, generating reference pulses by converting each pulse extracted from the mirror and diffusion components into photocurrents, and determining the quality of the surface from the photocurrents. Before being incident on the surface, the monochromatic beam is split into the mirror and diffusion pulses of the same duration. The reference pulses are generated by separating a part of the light flux from the extracted light pulses. The device comprises source of monochromatic light radiation, light-splitting plate, mirror made of a paraboloid of revolution, focusing system, first photodetector, unit for control and processing information, first obturator with a port and mirror zone on the surface of the rotatable disk, second obturator with a pair of same ports on the rotatable disk, and second photodetector.

EFFECT: enhanced accuracy and quality of determining.

5 cl, 4 dwg