Surface characteristic measurement

Details Surface characteristic measurement Surface characteristic measurement

1987-07-20

1989-07-11

Rosenberger, Richard A.

Optics: measuring and testing

Of light reflection

With diffusion

3561245, G01N 2132

Patent

active

048465780

ABSTRACT:
The measurement of surface characteristics such as distinctness-of-image glossiness and/or surface roughness of a sample is carried out by projecting an image of a pattern, reflected from the surface of the sample, onto an image forming plane, transforming the spatial distribution of the intensity of light on the image forming plane according to Fourier series, and quantifying the distinctness-of-image glossiness or the surface roughness according to the light power strength at a particular spatial frequency.

REFERENCES:
patent: 3250177 (1966-05-01), Shack
patent: 3771879 (1973-11-01), Chambu et al.
Jhiry, H., "Measurements of Modulation Transfer Function", Rev. H. F., vol. 8, No. 3 (1970), pp. 73-76.
Fisher et al., "Laboratory Determination of Modulation Transfer Function from Line Spread Function", Chrysler Defense Engineering, 1967.
Pospisil et al., "Measurement of the Modulation Transfer Function of Focusing Screens" Optica Acta vol 19, No. 7 (1972), pp. 593-604.

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