Photoelectric fiber thickness and edge position sensor

Details Photoelectric fiber thickness and edge position sensor Photoelectric fiber thickness and edge position sensor

1990-11-07

1992-07-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250561, 356387, G01N 2186, G01V 904

Patent

active

051305569

ABSTRACT:
An optoelectronic position-sensitive detector (PSD) is used with a light emitting diode (LED) in a through-beam photoelectric sensor application to detect the lateral position of an edge of an article or the lateral position or size variation of a thin object such as a small diameter fiber. The LED is offset toward one end of the PSD to establish a higher output signal at one end of the PSD than at an opposite end, thereby maintaining a positive output signal for the sensor. The LED and the PSD are potted with clear epoxy within holes in aluminum housing plates to provide RFI and EMI shielding.

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