VEB CARL ZEISS JENA RESEARCH IN VARIOUS TYPES OF BARRIER LAYER CELLS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A007500890001-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 21, 2016
• Document Release Date: June 3, 2008
• Sequence Number: 1
• Publication Date: August 3, 1955
• Content Type: REPORT

Approved For Release 2008/06/03: CIA-RDP80-0081 OA007500890001-4
INFORMATION REPORT INFORMATION REPORT
CENTRAL tNTEtLIGENCE AGENCY
This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws, Title
18, U.B.C. Seca. 793 and 794, the transmission or revelation of which in any manner to an unauthorized person is prohibited by law.
S-E_C..R_E?T
COUNTRY East Germany
SUBJECT VEB Carl Zeiss Jena Research in DATE DISTR. 3 August 1955
a. Barrier layer cells: Selenium cells said to be for photographic exposure
meters, range 200-900 mu, sizes 5 mm - 150 mm.
b :
(1) Cadmium sulphide - used for switching devices giving only a pulse
and not suitable for measuring devices; range visible to X-rays,
sizes (field) 0.15 mm x 5 mm to 8 mm in cells about 3/4 inch.
Various Types of Barrier Layer Cells 25X1
NO. OF PAGES 2
DATE OF INFO.
PLACE ACQUIRED
DATE ACQUIRED
REQUIREMENT NO. RD
REFERENCES
This is UNEVALUATED Information
1. VEB Carl Zeiss, Jena, is carrying out a fairly extensive research iri the
field of infrared and var. .ou.s types of barrier layer cells. Cells in,
which research and development work is at present in progress in the
laboratories include:
(2) Cadmium selenite
(3) Lead sulphide (PbS)
Provision can be made for both (2) and (3) to be cooled with C02 for infrared
work. Range is then 2.1 Si.to 3.5,441-
a. Alkali cells (mepsur{ ng calls):
(1) Cesium antimony, range U.V. to ?25O? and 460 to 650,E
(2) Cesium oxide, range 200 to 110A..
(3) Combination of desium oxide and antimony.
(4) Photocells for sound film.
d. Vacuum cells for electrometers --
(1) Special spherical cells with very high dark resistance 40 mA/lum.
Made-.Taith cesium antimony or cesium oxide.
(2) Another type with lower resistance (10111'1.) for spectrometric work --
4'0 mh/lum. , I - -
INFORMATION REPORT INFORMATION REPORT
Approved For Release 2008/06/03: CIA-RDP80-0081 OA007500890001-4
AIR x FBI AEC OSI Ey I x
(Note: Washington distribution indicated by "X"; Field distribution by "#".)
 Approved For Release 2008/06/03: CIA-RDP80-0081 OA007500890001-4
-2-
Provisiom has been made for all the above cells to be fitted, if
necessary, with quartz windows.
Approved For Release 2008/06/03: CIA-RDP80-0081 OA007500890001-4