Spatial scanning means for a photometer

Details Spatial scanning means for a photometer Spatial scanning means for a photometer

1979-08-27

1981-07-21

Evans, F. L.

Optics: measuring and testing

Photometers

Photoelectric

350 64, 350484, G01J 104, G02B 2717

Patent

active

042795079

ABSTRACT:
A scanning device adapted to be associated with a radiant energy measuring meter such as a luminance photometer to provide precision linear or angular scanning across an area of an object or a subject being measured without relative movement of the meter or subject. A scanning device which includes an optical assembly having an objective lens and a prism movable as a unit along or about the optical axis portion of light beams reflected or folded by and between the prisms whereby light received by the photometer is on the optical axis of the photometer regardless of the position of the movable optical assembly on the folded optical axis portion. Means are provided for moving the movable optical assembly linearly with respect to the optical axis portion for linear transverse scanning of a subject area or rotatively about said optical axis portion for angular scanning of a subject area. A scanning device for a luminance photometer which provides scanning microphotometric capability as, for example, to determine luminous cross-section of a cathode ray tube display.

REFERENCES:
patent: 954707 (1910-04-01), Spear
patent: 1250393 (1917-12-01), Vanderlip
patent: 2792448 (1957-05-01), Deuth et al.
patent: 3383151 (1968-05-01), Kohler et al.
patent: 3544797 (1970-12-01), Frungel
patent: 3552834 (1971-01-01), Vogl et al.
patent: 3642343 (1972-02-01), Tchejeyan et al.
Walker, Optical Engineering, vol. 13, No. 6, Nov./Dec. 1974, pp. G233 and G234.

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