EP 0267956 A4 19900108 - INDEX-SIGHT.
Title (en)
INDEX-SIGHT.
Title (de)
DEFRAKTIONSINDEXABBILDUNG.
Title (fr)
VISUALISATION D'INDICES DE REFRACTION.
Publication
Application
Priority
US 86873686 A 19860530
Abstract (en)
[origin: WO8707383A1] Method and apparatus for rendering visible changes in a refractive media such as gas and fluid flows which cause changes in the index of refraction due to pressure or thermal gradients, detection of leaks and distortion in window glass. In one embodiment the medium (15) whose deviation in index of refraction is to be determined is located between a point light source (10) and retroreflective screen (20). A camera (30) is focused to make the effect visible.
IPC 1-7
IPC 8 full level
G01B 11/16 (2006.01); G01F 1/66 (2006.01); G01M 3/38 (2006.01); G01N 21/41 (2006.01)
CPC (source: EP)
G01B 11/16 (2013.01); G01F 1/661 (2013.01); G01M 3/38 (2013.01); G01N 21/41 (2013.01); G01N 2021/1765 (2013.01); G01N 2021/416 (2013.01)
Citation (search report)
- [X] EP 0152894 A2 19850828 - SIEMENS AG [DE]
- [X] FR 2193975 A1 19740222 - SIRA INSTITUTE [GB]
- [Y] EP 0102282 A2 19840307 - ONERA (OFF NAT AEROSPATIALE) [FR]
- [X] METALLOBERFL[CHE, vol. 39, no. 12, December 1985, pages 425-428, H. MARGUERRE: "Kontrastierverfahren f}r Kr}mmungen und Welligkeiten an Oberfl{chen zur Qualit{tspr}fung, z.B. von Lackoberfl{chen"
- [X] OPTICS COMMUNICATIONS, vol. 36, no. 2, 15th January 1981, pages 117-120, North-Holland Publishing Co., Amsterdam, NL; M. GIGLIO et al.: "A white light speckle schlieren technique"
- [X] OPTIK, vol. 71, no. 3, 3rd October 1985, pages 105-112, Wissenschaftliche Verlagsgesellschaft mbH, Stuttgart, DE; H. MARGUERRE: "Ein neues inkoh{rentes Schlierenverfahren mit Retroreflektor"
- See references of WO 8707383A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8707383 A1 19871203; EP 0267956 A1 19880525; EP 0267956 A4 19900108
DOCDB simple family (application)
US 8701279 W 19870529; EP 87903960 A 19870529