Optics: measuring and testing – Lamp beam direction or pattern – With lamp focusing
Patent
1976-01-13
1978-07-25
Corbin, John K.
Optics: measuring and testing
Lamp beam direction or pattern
With lamp focusing
356199, G01B 1124
Patent
active
041025784
ABSTRACT:
A slit image extending in the lateral direction of a travelling object is projected onto the surface of the object from one direction by means of a projection lens. The slit image formed on the object is then projected by means of an image focusing optical system onto a grid to make a light section moire element. The optical axis of the image focusing optical system is different from that of the projection lens employed in the slit image forming optical system. The light section moire element is enlarged in the lateral direction by means of a condenser lens and an anamorphic lens and focused on another slit. Behind the slit is located a film to record a line of light spots which represent the surface irregularity of the object. The film is fed in synchronization with the travel of the object so that the surface irregularities of the object may be recorded on the film in the form of contour lines.
REFERENCES:
patent: 3614237 (1971-10-01), Kyle et al.
Suzuki Kiyoshi
Suzuki Masane
Baker Joseph J.
Corbin John K.
Ferguson Jr. Gerald J.
Fuji Photo Optical Co., Ltd.
Rosenberger R. A.
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