Optical scanning system

Details Optical scanning system Optical scanning system

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.

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