Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You and Your Team.

Learn More →

A note on luminance calibration of raster-scan cathode-ray tubes: temporal resolution, ripple, and accuracy

A note on luminance calibration of raster-scan cathode-ray tubes: temporal resolution, ripple,... A note on luminance calibration of raster-scan cathode-ray tubes: temporal resolution, ripple, and accuracy MICHAEL BACH* Univ.-Augenklinik, Killianstr. 5, D-79106 Freiburg, Germany Received 10 May 1996; revised 5 October 1996; accepted 5 October 1996 Abstract-Accurate luminance calibration is an important issue for stimuli in vision research. Raster-scan cathode-ray tubes present a rapidly scanning spot with a luminance of the order of 10,000 cd m-2 (the actual value depends on video timing and phosphor persistence). With little spatial integration this may result in overloading of the front stage of a photometer. More importantly, even if averaged over hundreds of milliseconds, the pulsed nature of the luminance signal will markedly reduce accuracy of the luminance measurement. A frame-synchronised photometer is described to increase measurement accuracy whilst still rapidly acquiring the result. 1. INTRODUCTION How exactly do we need to calibrate the luminance of a raster-scan cathode-ray tube (CRT)? Naturally, this will depend on the specific experiments. Generally, absolute calibration is not the most important goal. It is economical to search for extreme accuracy only where really necessary. When we try to understand the general properties of the visual system, we would hope that specific results do not change when we http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spatial Vision (continued as Seeing & Perceiving from 2010) Brill

A note on luminance calibration of raster-scan cathode-ray tubes: temporal resolution, ripple, and accuracy

Loading next page...
 
/lp/brill/a-note-on-luminance-calibration-of-raster-scan-cathode-ray-tubes-YMic0WN33b
Publisher
Brill
Copyright
© 1997 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0169-1015
eISSN
1568-5683
DOI
10.1163/156856897X00429
Publisher site
See Article on Publisher Site

Abstract

A note on luminance calibration of raster-scan cathode-ray tubes: temporal resolution, ripple, and accuracy MICHAEL BACH* Univ.-Augenklinik, Killianstr. 5, D-79106 Freiburg, Germany Received 10 May 1996; revised 5 October 1996; accepted 5 October 1996 Abstract-Accurate luminance calibration is an important issue for stimuli in vision research. Raster-scan cathode-ray tubes present a rapidly scanning spot with a luminance of the order of 10,000 cd m-2 (the actual value depends on video timing and phosphor persistence). With little spatial integration this may result in overloading of the front stage of a photometer. More importantly, even if averaged over hundreds of milliseconds, the pulsed nature of the luminance signal will markedly reduce accuracy of the luminance measurement. A frame-synchronised photometer is described to increase measurement accuracy whilst still rapidly acquiring the result. 1. INTRODUCTION How exactly do we need to calibrate the luminance of a raster-scan cathode-ray tube (CRT)? Naturally, this will depend on the specific experiments. Generally, absolute calibration is not the most important goal. It is economical to search for extreme accuracy only where really necessary. When we try to understand the general properties of the visual system, we would hope that specific results do not change when we

Journal

Spatial Vision (continued as Seeing & Perceiving from 2010)Brill

Published: Jan 1, 1997

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$499/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month