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Jouve S.A., EPO - Publication - KB, TaggedPDF v1.27
EP-0647835-A2-19950412
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EP-0647835-A2-19950412
A displacement detecting system comprises an optical detector which includes a one-chip optical IC having a laser light source, light receiving elements for generating in response to laser light reflected by a surface to be measured a focus error signal indicative of a deviation of a distance between the surface and an objective lens from a focal length thereof, and a prism.
A displacement detecting system comprises an optical detector which includes a one-chip optical IC having a laser light source, light receiving elements for generating in response to laser light reflected by a surface to be measured a focus error signal indicative of a deviation of a distance between the surface and an objective lens from a focal length thereof, and a prism.
en
European Patent Office
EP0647835
EP 0647835
G01D 05/26
Displacement detecting system
Displacement detecting system - European Patent Office - EP 0647835 A2
Displacement detecting system - European Patent Office - EP 0647835 A2
Adobe PDF Library 8.0
"EP0647835"; "EP 0647835"; "G01D 05/26"; "Displacement detecting system"
1.4
1
B
15
EP
0647835
A2
1995-04-12
94115864
1994-10-07
JP
25317593
1993-10-08
G01D 05/26
SONY MAGNESCALE INC.
Nakanishi, Noriko, c/o Sony Magnescale Inc.
Kume, Hidehiro, c/o Sony Corporation
Grünecker, Kinkeldey,Stockmair & SchwanhäusserAnwaltssozietät
Displacement detecting system
Verschiebungsmesseinrichtung
Displacement detecting system
Dispositif de détection de déplacements
A displacement detecting system comprises an optical detector which includes a one-chip optical IC having a laser light source, light receiving elements for generating in response to laser light reflected by a surface to be measured a focus error signal indicative of a deviation of a distance between the surface and an objective lens from a focal length thereof, and a prism.
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