Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Automatic sensitivity control in television systems

Not Accessible

Your library or personal account may give you access

Abstract

This paper discusses a way to resolve the contradiction between a tendency to maximize the optical-signal intensity range of objects and the limited dynamic range of photodetectors. Methods of controlling the sensitivity of television systems are analyzed, taking into account how they affect the spatial, temporal, noise, and other image-quality criteria. Diagrams from automatic-control theory are adapted to sensitivity-control systems, and a flowchart is proposed for an automatic sensitivity-control system that uses five methods with a specified sequence of priorities. A method is proposed that makes it possible to expand the working illuminance range in Pregius-series photodetectors (Sony) to 200 dB—i.e., by more than 40 dB—by controlling the accumulation time and the analog and digital amplification in combination.

© 2019 Optical Society of America

PDF Article
More Like This
Slow-scan television system

D. M. Hunten, B. E. Nelson, and C. J. Stump
Appl. Opt. 15(9) 2264-2267 (1976)

A High Sensitivity Satellite-Borne Television Camera for the Detection of Auroras

S. B. Mende and B. J. O’Brien
Appl. Opt. 7(8) 1625-1634 (1968)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved