Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1970-10-28
1980-03-18
Padgett, Benjamin R.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
244 316, 250203R, 250332, 250342, 250347, 250349, F41G 700
Patent
active
041936884
ABSTRACT:
An optical scanning system wherein infrared energy radiating from an object is directed to a Porro prism, such Porro prism being rotatable about the boresight axis of the optical scanning system so that the image of the object rotates, in the image plane of such system about its boresight axis, at an angular rate twice that of the Porro prism. A linear array of infrared detector elements is disposed in the image plane radially from the boresight axis of the scanning system. The angular deviation of the object from the boresight axis of the scanning system is measured by determining: (1) the angular position of the Porro prism when one, or more, of the infrared detector elements in the linear array is energized; and (2) which one, or ones, of such elements is energized.
REFERENCES:
patent: 3449035 (1969-06-01), Denaro
patent: 3471697 (1969-10-01), Riddle
Handbook of Chemistry and Physics, forty-fourth Edition, Hodgman et al., Chemical Rubber Publishing Co., 1963, pp. 361, 362.
Kyle Deborah L.
Padgett Benjamin R.
Pannone Joseph D.
Raytheon Company
Sharkansky Richard M.
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