Roof surface measuring apparatus

Details Roof surface measuring apparatus Roof surface measuring apparatus

1992-10-22

1995-01-03

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356353, G01B 1100

Patent

active

053791053

ABSTRACT:
An interferometer causes a reference beam and a subject beam reflected from a roof surface to interfere with each other to form an interference fringe, which is detected by an image detecting element in its measuring area. Detection data from the image detecting element is processed by an image processing circuit, and then subjected to phase difference detection. A continuous function is determined as an approximation to a relationship between phase data and unit measuring areas located in a direction perpendicular to a line corresponding to a ridge line of the roof surface. A analysis relating to a roof angle is performed based on the continuous function thus determined.

REFERENCES:
patent: 4762417 (1988-08-01), Wu et al.
patent: 5218425 (1993-06-01), Oono
D. Sen and P. N. Puntam Bekar, "Shearing Interferometers for Testing Corner Cubes and Right Angle Prisms," Jun. 1966.
N. P. Barton, "Measurement of Roof and Other Prisms," Apr. 1979.
Yu, D. Berezin, V. V. Lyubimov and L. N. Soms, "The Measurement of Prism Fabrication Errors by an Interference Method," Nov. 1976.

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