Optical surveying apparatus, such as transit, with artificial li

Details Optical surveying apparatus, such as transit, with artificial li Optical surveying apparatus, such as transit, with artificial li

1975-05-12

1976-05-25

Corbin, John K.

Optics: measuring and testing

Angle measuring or angular axial alignment

Relative attitude indication along 3 axes with photodetection

356147, 116129P, G01C 106

Patent

active

039588858

ABSTRACT:
A light emitting diode is located beneath a glass scale carrier, one for each scale (azimuth and elevation), emitting essentially monochromatic light, which penetrates through the glass scale; the scale is observed through an optical system. The optical system for viewing of the scale is located on a carrier secured in the telescope housing; the light emitting diodes are powered by a battery secured in the housing, which energizes a timer, such as R/C circuit settable for normal observation times, for example about thirty seconds.

REFERENCES:
patent: 3034709 (1962-05-01), Batori
patent: 3382756 (1968-05-01), Schneider et al.
patent: 3428021 (1969-02-01), Kuhl et al.
patent: 3433571 (1969-03-01), Brunson
GE Solid State Lamp Bulletin, 3-7041.

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