Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1988-01-28
1989-07-18
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
356394, 356 244, G01B 1124
Patent
active
048489123
ABSTRACT:
An apparatus for measuring shapes, comprises a scanner, having a plurality of arms for holding an object the shape of which is to be measured, and a turntable to which one end of each of the arms is fixed; and a device for forming a silhouette image of the object including a first optical system which has an optical axis parallel to a rotating axis of the turntable and which has a light source and a light receiving unit confronting each other to allow the object to be in between the light source and the light receiving unit of the first optical system, and a second optical system which has another optical axis substantially at a right angle to the rotating axis of the turntable and which has another light source and another light receiving unit confronting each other to allow the object to be in between the light source and the light receiving unit of the second optical system. A calculating device calculates a shape of the object, based on electric signals converted from an intensity pattern of light which has been formed by the device for forming a silhouette image of the object.
REFERENCES:
patent: 3947129 (1976-03-01), Wiklund
patent: 4122525 (1978-10-01), Eaton
patent: 4129384 (1978-12-01), Walker et al.
patent: 4778274 (1988-10-01), Yogo
Harayama Masami
Matsuju Yoichi
Matsunaga Hiroshi
Okuno Yoshihiro
Sano Kazuo
NKK Corporation
Rosenberger Richard A.
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