Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent
1975-03-31
1976-08-17
Corbin, John K.
Optics: measuring and testing
Refraction testing
Prism engaging specimen
356 2, 356120, G01B 1130
Patent
active
039751023
ABSTRACT:
An electro-optical apparatus is disclosed which provides outputs proportional either to the surface profile and the first derivative of the surface profile of a reflecting surface or to some light beam deviating property of a transparent article in a non-contacting manner over a plurality of lines over the article being measured. A narrow beam of laser light is scanned in a raster pattern over the article to be measured. A uniformly rotating, multi-faceted reflector device which has suitably chosen pyramidal angles and which is placed near the focal point of a collimating lens moves the scanning laser beam, denoted the measurement beam, across the article to be measured in a series of laterally spaced lines. The scanning beam is nominally perpendicular to the article being measured. The measurement beam is either reflected by the surface of a reflective test article, or auto-reflected by a master reflector surface for double-pass transmission through a transparent test article. After probing the test article, the measurement beam is focused onto a two-axis photoelectric position sensor by the collimating lens. Electronic circuitry processes the signals generated by the photoelectric position sensor to provide outputs indicative of the surface profile and the first derivative of the surface profile, or some light beam deviating property of a transparent article, independent of the tilt of the test article surface relative to the scanning measurement beam. Most importantly, the apparatus provides outputs over the entirety of the test article which are solely a function of the properties of the article being measured.
REFERENCES:
patent: 3529884 (1970-09-01), Ives et al.
patent: 3715165 (1973-02-01), Smith
patent: 3885875 (1975-05-01), Rosenfeld et al.
Born et al., Principles of Optics, Pergamon Press, New York, 1959, pp. 302-303.
Rosenfeld Alvin H.
Zanoni Carl A.
Corbin John K.
Zygo Corporation
LandOfFree
Scanning photoelectric autocollimator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scanning photoelectric autocollimator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning photoelectric autocollimator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1483033