Browse Prior Art Database

Optical Position Sensor

IP.com Disclosure Number: IPCOM000090016D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Culver, JV: AUTHOR [+2]

Abstract

Optical position sensor 10 is used in conjunction with light sensitive oscillator circuit 12 to monitor the position of small objects such as cores. Oscillator 12 is described in IBM Technical Disclosure Bulletins, Volume 8, page 653, and Volume 10, page 588.

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Optical Position Sensor

Optical position sensor 10 is used in conjunction with light sensitive oscillator circuit 12 to monitor the position of small objects such as cores. Oscillator 12 is described in IBM Technical Disclosure Bulletins, Volume 8, page 653, and Volume 10, page 588.

Sensor 10 includes microscope-like housing 14 that has mounted in it photodetector 16, fiber optic bundle 18 and beam splitter 20. Photodetector 16 is mounted on removable cap 22 and is connected to oscillator 12 by lines 15 and
17. Bundle 18 is mounted in collar 24 a predetermined distance from photodetector 16. Also included within the base or lower end 26 of housing 14 is objective lens 27.

Before operation of the device, a part is precisely located at a certain station adjacent lens 27. The part can be adjusted at the station by removal of cap 22 and sighting through bundle 18. This enables oscillator 16 to be adjusted so that a correctly positioned object at the station reflects enough light so that the output level from oscillator 12 is at a preselected level. In operation, the station is illuminated by light directed from a lamp onto splitter 20 and through lens 27. The light rays are then reflected back-from the surface of the station and through bundle 18 onto photodetector 16. Any diminution in the amount of light reflected, as occurs when an object is incorrectly positioned at the station, is picked up by detector 16 and results in a corresponding diminution in output volta...