Browse Prior Art Database

Optical Information Coupling between Stationary and Rotating Systems

IP.com Disclosure Number: IPCOM000094590D
Original Publication Date: 1965-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Kline, ND: AUTHOR [+2]

Abstract

Data is transmitted in two channels between a stationary system 1 and a system 2 revolving about an axis of rotation 3 in the direction indicated. The stationary, two-channel transmitter 1 has a pair of radiation emitting diodes 5 and 7 driven by injection current supplied by the modulators 9 and 11, respectively. Diodes 5 and 7 can, for example, be GaAs infrared-emitting diodes. Data signals to be transmitted over channel A are entered into 9. This generates and supplies a uni-directional current, modulated in accordance with the input data, to 5. The intensity of output beam 13 at a given time is a function of the instantaneous value of the current. In a similar manner, data to be transmitted over channel B is manifested on beam 15 emitted from 7.

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 98% of the total text.

Page 1 of 2

Optical Information Coupling between Stationary and Rotating Systems

Data is transmitted in two channels between a stationary system 1 and a system 2 revolving about an axis of rotation 3 in the direction indicated. The stationary, two-channel transmitter 1 has a pair of radiation emitting diodes 5 and 7 driven by injection current supplied by the modulators 9 and 11, respectively. Diodes 5 and 7 can, for example, be GaAs infrared-emitting diodes. Data signals to be transmitted over channel A are entered into 9. This generates and supplies a uni-directional current, modulated in accordance with the input data, to 5. The intensity of output beam 13 at a given time is a function of the instantaneous value of the current. In a similar manner, data to be transmitted over channel B is manifested on beam 15 emitted from 7.

The rotating receiver 2 has a pair of concentric photosensitive areas 17 and 19 made of, for example, Si. As 2 rotates, beam 13 is continually trained on 17 and beam 15 is continually trained on 19. Data signals generated by the incidence of 13 on 17 are fed via leads 21 to channel A demodulator 25, which reconstructs the original channel A input data. Similarly, leads 23 couple 19 to demodulator 27, which reconstructs the channel B input data.

It is to be noted that information may be transmitted from the rotating system 2 to the stationary system 1 merely by reversing the positions of the transmitter and receiver.

1

Page 2 of 2

2

[This page contain...