Range testing system having simulated optical targets

Details Range testing system having simulated optical targets Range testing system having simulated optical targets

1976-07-23

1978-01-17

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

73 5, 73432SD, 350 96C, G01C 308

Patent

active

040689522

ABSTRACT:
A fiber optic device to produce either single or multiple delayed light pulses from a single input light pulse for testing of a range determining unit such as a laser range finder. The optical range tester includes a coil of an optical waveguide such as a single optical fiber, input and output focusing lenses and a multiple tapping unit for extracting or sampling light energy from the fiber at a number of predetermined points along the coil to provide different time delays. All of the sampled output beams are combined optically so that they leave the device on a common optical axis so as to be sensed by an optical detector in the laser receiver. The optical range tester in accordance with the invention, may be utilized either as a portable unit or as a built-in test unit. The range tester may provide a minimum range return, a nominal return and a range resolution return and may include extinction filters to allow a determination of effective transmitter to receiver gain. For the range tester utilized as a portable unit, internal optical stimulus may be provided to allow the range finder receiver optics to be bore sighted to the optical output of the range tester.

REFERENCES:
patent: 3428815 (1969-02-01), Thompson
patent: 3526880 (1970-09-01), Filippazzi
patent: 3870396 (1975-03-01), Racki et al.
patent: 3900261 (1975-08-01), Wingate
patent: 3914052 (1975-10-01), Wiklund
patent: 3981592 (1976-09-01), Williams

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