RESEARCH REPORT NUMBER-71006-01 PROGRESS REPORT ON DEVELOPMENT OF INFRARED AND UTLRAVIOLET RADIATION SOURCES

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A000100030014-2
• Release Decision: RIFPUB
• Original Classification: C
• Document Page Count: 6
• Document Creation Date: December 9, 2016
• Document Release Date: May 9, 2000
• Sequence Number: 14
• Publication Date: September 30, 1955
• Content Type: PERRPT

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AMW
RESEARCH REPORT NObsr-71006-1.
PROGRESS REPORT ON
DEVELOPMENT OF INFRARED AND ULTRAVIOLET SOURCES
CONTRACT NUMBER NObsr-71006
DISTRIBUTION LIST
Chief, Bureau of Ships, Code 312
Commander, New York Naval Shipyard, Code 961
Commanding Officer, U.S. Navy Underwater Sound Labs. (G. M. Milligan'.
Inspector of Naval Material, Newark, N.J.
CONFIDENTIAL
NAVY DECLASSIFICATION/RELEASE INSTRUCTIONS ON FILE
Thin doetumsnt contatns.infnrmptinn affecting
the Natiuna:l Defense of the Utd.ted States with-
in the meaning Of th3 Espionage Act, 50' U.S.C.. 31
and 32. Its transmission or the revelation of its
contents in any manner to as unauthorized person
is prohibited by lax.
I O1 2C4 C ;-. 5
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QUARTERLY DEVELOPMENT REPORT NObsr-71006-1
ON
DEVELOPMENT OF INFRARED AND ULTRAVIOLET RADIATION SOURCES
This report covers the period Aug. 1, 1955 to Sept. 30, 1955
Westinghouse Electric Corporation
Bloomfield, N.J.
Navy Department, Bureau of Ships, Code 853
Contract Number - - NObsr-71006
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ABSTRACT
Experimental work was started on making small size cesium vapor lamps
of 15 to 20 watts power rating. The light sources were mounted in sealed
beam reflector type envelopes similar to those used for automobile head-
lamps. Five lamps were sent to the Underwater Sound Laboratory for their
laboratory and field tests.
PURPOSE
An engineering research program was undertaken in our laboratory
upon invitation of the U.S. Navy, Bureau of Ships to "Study, investigate,
design, develop and fabricate experimental special lamps suitable for use
in infrared and ultraviolet communication sets".. The work described below
is a continuation and modification of development work carried out under
former contracts - principally NObsr-57285.
INTRODUCTION
Two days were spent at the Underwater Sound Laboratory and on Fischer's
Island (March 30 and 31,, 1955) to observe tests and demonstrations of our
small cesium lamps, and to discuss the communications program with their
project engineers as it affects infrared sources in this new development
contract. At the invitation of Mr. C. S. Woodside a trip was made to the
Bureau of Ships, Washington, D.C. on August 17, 1955 to attend a meeting
on Infrared Communications with men from the Bureau of Ships, Underwater
Sound Laboratory, Naval Research Laboratory, Signal Corps Laboratory and
Northwestern University. These meetings furnished the basis for establish-
ing a suitable cooperative program for our activities, and indicated the
type of experimental work that should be done to yield the most useful
information and greatest benefit to the various defense departments.
Our present program includes the making of low wattage sealed beam
cesium vapor lamps especially those of less than 10 watts power consump-
tion. Some thought and effort has been given to the construction of low
wattage, low voltage tungsten filament lamps that might be used in a port-
able,audio modulable light source. Further consideration will be given to
larger size cesium lamps that provide 3600 horizontal and 20? vertical
beam spread. A 250 to 300 watt cesium lamp in a Fresnel lens housing hav-
ing internal reflector baffles was suggested several years ago for this
application, but no experimental work was done.
EXPERIMENTAL WORK
Figure 1 shows a sketch of a small cesium vapor lamp mounted in an
evacuated outer housing similiar to a sealed beam automotive headlamp.
In these lamps the clear glass lens is sealed to the reflector with a
thermosetting plastic cement called Araldite AN100 instead of by the
direct fusion of the glass parts. A nichrome wire heater is wound around
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the and tuba a distance of several millimrs to furnish the necessary
resistance ballast to operate the lamp on about a 12 volt storage battery.
The heat from the ballast raises the vapor pressure of the cesium metal
and thus increases the efficiency and infrared output from the lamp. The
three metal caps protruding out of the back of the lamp are soldered to
flexible leads that terminate in a type P303-CCT Jones plug. The polarity
of the Jones plug is as follows: -
#1 pin - Ballast lead
#2 " - Cathode "
#3 " - Anode
This lamp structure is assigned a tentative nomenclature of "CL-4 type"
to minimize the number of words to describe it,. This is the same type of
lamp that was made on Order Number NYOA-91438 dated Nov. 17, 1954 that
called for 6 such lamps. These lamps were delivered to Underwater Sound
Laboratory Jan. 19, 1955.
Four "CL-14" type lamps were made to meet the specifications of item. 1-a.
A fifth lamp, #5-S, actually drawn to scale in Fig. 1, has a shorter arc
length and smaller diameter than the four lamps mentioned above. The hori-
zontal beam spread from this lamp, while the are tube is in a vertical posi-
tion,. is about 100 to half intensity and 160 to the 10% intensity points.
The horizontal beam pattern of this lamp is shown in Fig. 2. The vertical
beam spread should be about 50% larger than the horizontal beam. Table I
gives data on the changes in relative beam intensity in arbitrary units
(galvanometer deflections) with changes in current through lamp #5-S.
Column A is current in atmperes, B is are voltage, C is voltage across both
the lamp and ballast resistance, D is infrared beam intensity measured with
a cesium photocell and Wratten #87 filter. These data were obtained with
the lamp operating on d.c., lamp vertical, anode at bottom. A waiting
interval of 2 to 3 minutes occurred between each of the successive current
settings to allow for thermal equilibrium. Operating characteristics and
field performance data have been obtained from the more or less standard
size "CL-4" lamps, so only the data from the experimental lamp #5-S is
recorded in this report.
Four standard size "CL-4" lamps and the experimental lamp designated
as #5-S were shipped by express to the Underwater Sound Laboratory on
September 29, 1955.
CONCLUSIONS
The data obtained from experimental lamp #5-S indicated that with
changes in lamp structure one may make usable lamps with still lower wattage
that the 15 to 20 watts consumed by the small sealed beam cesium vapor lamps
that are identified as type "CL-4" in this report.
We expect to make a few more "CL-4" type lamps to meet the requirement
of item 1-a in the contract, so that over a period of two years we will
complete the request for 24 such lamps. Additional lamps of this general
type will be made with changes in lamp size and structure and their charac-
teristics measured.
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TABLE I - DATA FROM LAMP #5-S
1.7 amp.
6.5 volts
12.2 volts
9.2 cm.
1.6
6.5
12.0
9.0
1.5
6.5
11.6
8.5
1.4+
6.5
11.2
7.6
1.3
6.5
11.0
7.2
1.2
6.6
lo.8
6.14
1.1
6.8
10.5
5.8
1.0
7.0
lo.4
5.2
0.9
7.0
10.3
4.8
0.8
7.4+
10.2
4+.3
0.7
7.5
10.0
3.7
0.6
7.9
9.8
3.1
0.5
8.2
9.8
2.6
Engineering personnel involved
this interval were: -
N.
C. Beene
163 hours
J.
N. Hoffa
210
A.
Schramm
22
in this contract and the time spent during
Total 395 hours
-3-
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1 06ONPIDENTAU
F G . _ -3o-'SS
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SKETCH OF CL-?* CESIUM VAPOR LAMP ' s S
i -r I 1----i
D1$T41VCE ACROSS BEAM
BEAM P,17-7-ERA/ OF LAMS' S-S