LASER STEREO ENDOSCOPE Russian patent published in 2008 - IPC G02B23/00 A61B1/02 

FIELD: flaw detection.

SUBSTANCE: stereo endoscope contains enclosure, two identical lenses with equal focal distances, image transmission system, two identical CCD matrixes, microlaser, computer, and liquid-crystal obturation glasses. The optical axes of the lenses, in the focal planes of which the CCD matrixes are located_; and the microlaser axis are parallel to one another and normal to the longitudinal axis of the stereo endoscope enclosure, and are located in the plane formed by the longitudinal axis of the endoscope shell and the optical axis of the microlaser. The computer performs alternate and synchronous connection of one of the CCD matrixes and the corresponding obturation glasses channel required for the creation of the stereoscopic effect, and calculates the distance D from the endoscope to the object surface point illuminated by the microlaser. The coordinates of these points in the plane of the corresponding CCD matrixes and the calculation results are displayed at the computer display screen. The focal distances of the lenses are selected depending on the conditions where Dmin is the minimum distance from the endoscope to the object, 1 is the distance from the microlaser axis to the lens closest to it, A is the CCD matrix dot size, B is the normal distance between the optical axes of the lenses in the plane of their location.

EFFECT: eliminates subjectiveness in flaw depth (height) measurement.

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