Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Differential Optical Potentiometer

IP.com Disclosure Number: IPCOM000048863D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Winarski, DJ: AUTHOR

Abstract

An eccentrically mounted circular disk can give a rotary motion differential feeback using two photoconductors mounted 180 degrees apart at the periphery of the disk. As the disk is rotated, one photoconductor is increasingly shadowed while the other is increasingly exposed.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Differential Optical Potentiometer

An eccentrically mounted circular disk can give a rotary motion differential feeback using two photoconductors mounted 180 degrees apart at the periphery of the disk. As the disk is rotated, one photoconductor is increasingly shadowed while the other is increasingly exposed.

As shown in the figures. a circular disk 1 is mounted on a shaft 2 offset from the center 3 of the disk 1. Light sources 4 and 5 are directed toward photoconductors 6 end 7. respectively, with one of each mounted 180 apart around the periphery of the disk 1. A power source 8 is used to illuminate the lamps 4 and 5. The outputs of the photoconductors 6 and 7 are directed to a utilization device 9 for use therein to obtain a differential feedback.

In operation, as the disk 1 is rotated about shaft 2, the light seen by one photoconductor is increasingly shadowed while the other photoconductor is increasingly exposed. Thus, as shown in the figure, the light from lamp 4 is increasingly exposed, while the light from lamp 5 is increasingly covered. Thus, the disk can provide a rotary motion differential feedback for use in the utilization device 9. The lamp and photoconductor combination can be provided by a light- emitting diode emitter and receiver system.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]