ELECTRON MICROSCOPE VEB CARL ZEISS JENA

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A007100870006-5
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 21, 2016
• Document Release Date: November 7, 2008
• Sequence Number: 6
• Publication Date: June 28, 1955
• Content Type: REPORT

Approved For Release 2008/11/07: CIA-RDP80-0081 OA007100870006-5
C NTRAL INTBLLIG ICE AGENCY
INFORMATION REPORT
CONFIDENTIAL
COUNTRY East Germany
SUBJECT Electron Microscope, VEB Carl Zeiss,
Jena
DATE OF INFO.
PLACE ACQUIRED
DATE ACQUIRED
THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE.
THE APPRAISAL OF CONTENT IS TENTATIVE.
(FOR KEY SEE REVERSE)
1, The Electron Microscope Laboratory in the Research Department at VEB Carl 5X1
Zeiss, Jena, is under the direction of Dr. Ernst Guyenoto He is assisted
by E. Hahn and approximately 16 other scientists and technicians. At the
April 1955 meeting of the German Electron Microscope Society in Muenster,
both Guyenot and Hahn- dealt with their work at
-Jena. Guyenot and Hahn were 'also present at the Achema exhibition in
Frankfurt/Main during the week of 16-21 May 1955 where they demonstrated
the new electrostatic electron microscope, Elmi D, recently developed at
Guyenot's laboratory.
2. The Elmi D electrostatic electron microscope is similar in many respects t(.
one developed and placed in production at Jena over a year ago, but has
been completely redesigned with many new features. Only sic to tax units of
the first type were produced. The present microscope is not intended to
have an extremely high magnification, but rather a medium magnification
with especially clear pictures and ease in operation. Characteristics of
this microscope are as follows:
Astigmatism: Corrected to less than 5 mu.
Weight: Microscope .- 500.4.
Power Supply and pumps - 600 kg.
? tl weight - 1100 kg.
Number of objectives: Five.
Number of forepumps: Four.
High voltage: Regulated to 50 Us 911 high-voltage parts, including the
cable, are immersed in coil.
This material contains information affecting the
National Defense of the United States within the
meaning of the Espionage Laws, Title 18, U.S.C.
Secs. 793 and 794, the transmission or revel-
ation of which in any manner to an unauthorized
REPORT
DATE DISTR.
NO. OF PAGES 2
REQUIREMENT NO. RD
REFERENCES
28 June 1955 25X1
STATE -%r
J_ ARMY NAVY AIR
(Note: Washington distribution indicated by "X"; Field distribution by "#",)
25X1
Approved For Release 2008/11/07: CIA-RDP80-0081 OA007100870006-5
 Approved For Release 2008/11/07: CIA-RDP80-0081 OA007100870006-5
High-voltage supply frequency: 50 kc.
Photographs: Chamber will take either four 6.5 x 9 cm. plates or
normal 35-mm. film. Apprpximately one day's supply can be
de-gassed in the vacuum chamber provided in the housing in
back of the microscope.
Objective changing: Approximately 30 seconds.
Magnification with help of normal optical microscope: 5 to 150,000 x.
Vacuum: 2 to 3 x 10-6 mm.
Diameter of image: 100 nmi.
Lense system: 5-stage electrostatic system.
Images: Light or dark field pictures,steroaphotographs and diffraction
pictures.
Electron optical magnification: In calibrated steps - 2000, 3000, 6000,
8000, 12,000, 20,000 and 30,000 x, with additional steps between
600 and 2000 x.
3. Plans now call for two additional electron microscopes to be completed by
December 1955 and six more during the spring of 1956. These units will not
be constructed in the Electron Microscope Laboratory but in the Development
Department which is equipped for this type of small-series production. Even
in the development stage, all except the smallest parts had to be constructed
in special machine shops associated with the Research Department of Zeiss
Jena. In the first tests on the electrostatic optical system, brass lenses
were used in place of steel in order to simplify the construction of the
parts.
4. Several improvements will be made on the next two units which will be
produced for sale. The principal change will be the addition of a fine
ray condenser. However, the general appearance of the microscope will not
be altered substantially. The high-voltage supply and the vacuum pumps for
the microscope are mounted in separate cabinets and can be placed in another
room or on another floor, up to approximately 16 meters away from the
microscope.
5e Hahn was primarily associated with the development of the condense system
and the electrostatic focusing lenses] whereas Guyenot was concerned with
the general guidance of the project as a whale. Guyenot was formerly with
another laboratory in Zeiss Jena and was transferred to his present position
during the past year.
Approved For Release 2008/11/07: CIA-RDP80-0081 OA007100870006-5