Optical encoders using pseudo-random-binary-sequence scales

James S. Johnston; A. E. Romer; M. S. Beales

doi:10.1117/12.50981

1 December 1991 Optical encoders using pseudo-random-binary-sequence scales

James S. Johnston, A. E. Romer, M. S. Beales

Proceedings Volume 1589, Specialty Fiber Optic Systems for Mobile Platforms; (1991) https://doi.org/10.1117/12.50981
Event: OE Fiber, 1991, Boston, MA, United States

Abstract

Single-track absolute encoders have the advantage of mechanical simplicity although they require more complex electronics and software than conventional multi-track instruments. The presence of intelligence at the point of measurement means that diagnostics can be incorporated which are not possible in the conventional instrument. The instruments described here use a track encoded with a pseudo-random-binary-sequence (PRBS) a small section of which is imaged onto a line-scan sensor. The digital word so imaged gives the coarse position while the exact location of edges in the image gives the fine position.

Citation Download Citation

James S. Johnston, A. E. Romer, and M. S. Beales "Optical encoders using pseudo-random-binary-sequence scales", Proc. SPIE 1589, Specialty Fiber Optic Systems for Mobile Platforms, (1 December 1991); https://doi.org/10.1117/12.50981

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Computer programming

Line scan image sensors

Optical fibers

Electronics

Image sensors

Optical encoders

Show All Keywords

Keywords/Phrases

Search In:

Publication Years