Head for measuring reflectance

Details Head for measuring reflectance Head for measuring reflectance

1983-07-01

1987-05-19

Rosenberger, R. A.

Optics: measuring and testing

Of light reflection

With diffusion

250227, G01N 2147

Patent

active

046663096

ABSTRACT:
The present invention is with respect to a reflectance measuring head that is designed for stopping the production of false readings by regular (as opposed to diffuse) reflection and shiny parts of the sample without using normal shine traps or diaphragms. False readings as produced by regular reflection, by surface grain or structure and by inhomogeneity of the surface of the sample are furthermore put an end to by having a number of transmitters placed at an equal distance from one receiver or having a number of receivers placed at an equal distance from a transmitter. A more specially useful effect is produced if a number of transmitters and a number of receivers are placed alternately in the form of a matrix.

REFERENCES:
patent: 3327584 (1967-06-01), Kissinger
patent: 3718399 (1973-02-01), Kalman
patent: 3806256 (1974-04-01), Ishak
patent: 3885878 (1975-05-01), Ishak
patent: 3940608 (1976-02-01), Kissinger et al.
patent: 4033698 (1977-07-01), Demsky et al.
patent: 4101222 (1978-07-01), Mathisen
patent: 4464054 (1984-08-01), Karras et al.
Cook and Hamm, "Fiber Optic Lever Displacement Transducer", Applied Optics, vol. 18, No. 19, Oct. 1979, pp. 3230-3241.
O'Donovan and Lind, "Proximal Scanning Systems: Improved Resolution Using Inclined Optical Fibers", Applied Optics, vol. 15, No. 5, May 1976, pp. 1299-1303.

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