API Build-data JSON Resources
Theme

Choose how MSRBot.io looks on this device.

Auto (match system) Light mode Dark mode

Preference is stored in this browser only.

SMPTE Journal ( Volume: 64, Issue: 8, August 1955)
[ACTIVE]

Control of Light Intensity in Television Projectors

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
SMPTE J
Volume
64, No. 8, pp. 416–419
Abstract
RCA's television projectors used with vidicon film cameras are equipped with a light-intensity control unit developed for this purpose. The unit is used to control the video output level of the camera by varying the intensity of the projector light source to compensate for varying film density. The angular position of a continuously variable neutral-density filter wedge placed in the condenserlens system of a projector is remotely controlled by a servomechanism. Thus the signal-to-noise ratio of the system is maintained at its optimum value since the camera is operating with essentially constant input level.
Publication Date
1955-08-01
DOI
10.5594/J11309
ISSN
Print: 0898-0438
Link
https://doi.org/10.5594/J11309
Author(s)
K. SadashigeEngineering Products Div., Radio Corp. of America, Camden 2, N.J.
B. F. MelchionniEngineering Products Div., Radio Corp. of America, Camden 2, N.J.
Copyright
© 1955 Society of Motion Picture and Television Engineers, Inc.
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J11309.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree
Reference this Doc

Plain text (ISO 690 compliant)

Preview:
K. Sadashige and B. F. Melchionni; Control of Light Intensity in Television Projectors, SMPTE Journal ( Volume: 64, Issue: 8, August 1955); SMPTE, 1955. Available at https://doi.org/10.5594/J11309
Snippet:
K. Sadashige and B. F. Melchionni; Control of Light Intensity in Television Projectors, SMPTE Journal ( Volume: 64, Issue: 8, August 1955); SMPTE, 1955. Available at https://doi.org/10.5594/J11309

HTML (ISO 690 compliant)

Preview:
K. Sadashige and B. F. Melchionni; Control of Light Intensity in Television Projectors, SMPTE Journal ( Volume: 64, Issue: 8, August 1955); SMPTE, 1955. Available at https://doi.org/10.5594/J11309
Snippet:
<span class="citation">K. Sadashige and B. F. Melchionni; <cite>Control of Light Intensity in Television Projectors</cite>, SMPTE Journal ( Volume: 64, Issue: 8, August 1955); SMPTE, 1955. Available at <a href="https://doi.org/10.5594/J11309" target="_blank" rel="noopener">https://doi.org/10.5594/J11309</a></span>

SMPTE Icon SMPTE's HTML Pub

Preview:
K. Sadashige and B. F. Melchionni; Control of Light Intensity in Television Projectors, SMPTE Journal ( Volume: 64, Issue: 8, August 1955); SMPTE, 1955
doi: 10.5594/J11309
url: https://doi.org/10.5594/J11309
Snippet:
<li>
K. Sadashige and B. F. Melchionni; <cite id="bib-10-5594-j11309">Control of Light Intensity in Television Projectors</cite>, SMPTE Journal ( Volume: 64, Issue: 8, August 1955); SMPTE, 1955
<span class="doi">10.5594/J11309</span>
</li>

Referenced By