CORRESPONDENCE ON PRODUCTION OF 'SCHILIEREN' DEVICES

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00457R014000030002-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 20, 2016
• Sequence Number: 2
• Publication Date: October 7, 1952
• Content Type: REPORT

Approved For Release 2007/03102 :CIA-RDP82-004578014000030002-5 ,~~'=
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DATE ?ISTR, 7 October ~..45~
~~1BJ1E~:i' Lorrespondence oxi Production of ~'Schilierent9 Devices ~0~ 0~ PAGES
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~, 0. ?F ENCLSp
~^ k ~ ~ L.IS?L"D SF4GV~
~~~ ~ ~:: \,~y; ~ " SUPPLEMENT TO
DD NOT C~~iCUL~TE REPOR-r No.
The device serves to make visible. and to photograph aSehlieren?, that is~
cha.-iges of refraction (local deviations of light} in transparent mediae
Such pSchliereng can ba predated in gaseous matter as well as in liquid and
solid substancese Occurrence of eSchlieren' in glass plates is wellwkno~rav
Change of the refractive index in gaseous matter is mostly caused by pressure
caused by rapidly moving 'bodies in stationary ear or by stationary bodies in
moving air, ~ `
I~TELLOFAX 2i
C?UNTRY mast Gernzaa~y
THIS BS UNE~IALUATED lNFORMATlL~I~
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le As report?d presviottslyt the Feiss works in Jena halt in the paste made repeated
attempts to .obtain Russian ermisaion to resu~ae production pf the
"Schliere eraet?i
CLASSIFlCATiON ''~'c``' ~~ ~ .
Sa.CUiiI2`Y' IPdI'Uiii,AfilUS
CENTRAL lNTELLIGENCF AGENCY RCP4RT NOe
these sued similes observations az`~ assigned to physics institutes, research
installa.tionst and industrial laboratorieso Institutes in the people's
STATE ~ $ ~ R7AVY
ARPn~'y' ~%' 3C Al~_
CLASSlFl~;ATlUN S~C3'~.+;T
 Approved For Release 2007/03102 :CIA-RDP82-004578014000030002-5
2a The Zeiss works did not receive a decision on t~aeir applicatiar.> ~.ntil ?:Tune 19520
1Tabix7~; whe intervals they rea;eived a request fxom the Rumax~i~:n State organiza*..~.onA
Technoinaport~ for de~.~.ve~ ok' a`$ Sch7.ierer~' devices ~';~e Rumanian request 4.rras
as sollo~rs:
~?1~ Schlierer~-~opt:~. rastaliation after the coincide~ace ~+rocedu.re to ~rtake
visible flow processes (Str~mug~svorg~tnge} ~.'~h high ~a.c~~ rurrb~rs and sarong.
~ae^~~:rat~z~~e p~rac~~.entso Light clea~-age {~.ichtspa~.t,) and ~ach~.ieren ditiphaaggt'n
~Noh7i.ierenblez~d~:} are to be mounteri on ~, tux?:~ab~.e tGp arzd are to b=, asl~ustable
ts~ any posi.tiort between horizontal and ~rerticalo ThL di~rrset~:r of tn.e mixa~c~r
,and ~,he radius of c~zrvature are to be detera~ined by Ze~_ssg c~~nside^ ing ~t~ehat
the test room {'Ver-sucYis~au~a} ~r'.~th the d:~i~nsi?ns ~~J 1r~r 3~0 ce~r.tim~t?:~s is for
~looities of 103. meter Mactao The width of the roo:~, in ~~~a~ich the in,~trument
as to be rlaced i~ ~i mc~~.exGo Sp~:c~.f~.ca~'.~.nn~ ~.? t,~+s ~.~Arht so~x?ces a Spark
duraf~ian smal.le~? than one micro-seconcds b) immediate rhar~~e .From p?x~ma.nent
~.:~.ght to spsrk~ c~ EipYb?dieutut~~'
~~'t~,er receiving tl:e Rumaraia~~ rec~uest~ eiss again urged TrIA tv b~?ir~F about a
settler~nt of ~~he mattex~a ;31~. for?~arried tA3e urgent Zeiss rec~~es~? .th