EP 1204366 A1 20020515 - CLOSED LOOP OPTICAL COHERENCE TOPOGRAPHY
Title (en)
CLOSED LOOP OPTICAL COHERENCE TOPOGRAPHY
Title (de)
OPTISCHE KOHÄRENZTOPOGRAPHIE IN GESCHLOSSENEM KREIS
Title (fr)
TOPOGRAPHIE PAR COHERENCE OPTIQUE ET A BOUCLE ASSERVIE
Publication
Application
Priority
- AU 0000802 W 20000630
- AU PQ139899 A 19990702
Abstract (en)
[origin: WO0101849A1] The present invention provides an optical coherence topography apparatus and method for determining the topology of a surface of or within a sample, the apparatus having: a light source for providing a beam of light; a beam splitter for splitting the beam into first and second components; a sample arm for receiving the sample and characterized by a first path length; scanning means for scanning the sample with the first component of the beam; a reference arm with a reference means for receiving the second component, the reference arm characterized by a second path length; and a light detector for detecting interference patterns due to interference of a reference beam from the reference means and a sample beam from the sample; wherein one of the first and the second path lengths is controllably adjustable and the apparatus includes control means responsive to changes in the interference patterns due to differences in the first path length as the sample is scanned, by adjusting the one of the first and the second path lengths to compensate for the changes in the first path length, whereby the adjustment in the one of first and second path lengths is indicative of the changes in the first path length and thereby of the topology.
IPC 1-7
IPC 8 full level
A61B 3/107 (2006.01); G01B 9/02 (2006.01); G01B 11/24 (2006.01)
CPC (source: EP)
A61B 3/107 (2013.01); G01B 9/02091 (2013.01); G01B 11/2441 (2013.01); G01B 2290/20 (2013.01); G01B 2290/35 (2013.01); G01B 2290/65 (2013.01)
Citation (search report)
See references of WO 0101849A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0101849 A1 20010111; AU PQ139899 A0 19990729; EP 1204366 A1 20020515
DOCDB simple family (application)
AU 0000802 W 20000630; AU PQ139899 A 19990702; EP 00940060 A 20000630