Long range, thru-beam photoelectric alignment indicator

Details Long range, thru-beam photoelectric alignment indicator Long range, thru-beam photoelectric alignment indicator

1988-07-01

1990-06-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340556, G01V 904

Patent

active

049316311

ABSTRACT:
A photoelectric alignment indicator that includes two indicators (10) and (11) and a photoelectric receiver (2) is disclosed. A housing (3) houses the indicators (10) and (11) and the photoelectric receiver (2). One indicator (10), formed by a collimating lens (10b) and LED (10a), is mounted adjacent to the photodetector (9) of the photoelectric receiver (2) and transmits visible energy (12) into substantially the same field as the field of view of the photodetector collimating lens (9b). The second indicator (11) is mounted on the rear surface (8) of the photoelectric receiver housing (3), opposite the receiver photodetector (9) and emits visible energy (12) viewable from the end of the photoelectric receiver (2) remote from the transmitter (1). Alignment of the photoelectric transmitter (1) with the photoelectric receiver (2) allows the light (13) from the light source (15) of the photoelectric transmitter (1) to illuminate the receiver photodetector (9), energizing the indicators (10) and (11). The end result are alignment indicting signals that are viewable from both the photoelectric transmitter (1) and the photoelectric receiver (2).

REFERENCES:
patent: 3857639 (1974-12-01), Mason
patent: 4013886 (1977-03-01), Schmid
patent: 4051365 (1977-09-01), Fukuyama et al.
patent: 4814628 (1989-03-01), Eichweber

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