Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1995-06-07
1997-05-13
Pham, Hoa Q.
Optics: measuring and testing
By polarized light examination
With light attenuation
G01B 1124
Patent
active
056297734
ABSTRACT:
A three-dimensional image measuring device which comprises a light source; a plane image forming unit for forming a plane image in a space in its depth direction on the basis of light emitted from the light source; a scanning unit for moving and scanning the plane image formed by the plane image forming unit in its depth direction; an object to be measured disposed in the space where the plane image is formed; a light receiving unit for measuring the strength of light scattered on a surface of the object as the plane image is moved and scanned and; a distance measuring unit for measuring the distance to the object on the basis of the output of the light receiving unit, whereby a three-dimensional image with least reduced invisible area is easily and accurately measured in a short time without using the principle of triangulation.
REFERENCES:
patent: 4585349 (1986-04-01), Gross et al.
patent: 4657393 (1987-04-01), Stern
patent: 5054926 (1991-10-01), Dabbs et al.
patent: 5298989 (1994-03-01), Tsukahara et al.
Ando Manabu
Moriya Masato
Suzuki Toru
Terada Keiji
Wakai Hideyuki
Kabushiki Kaisha Komatsu Seisakusho
Pham Hoa Q.
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