EP 1140581 A1 20011010 - DETECTOR OF STAINS ON A TRANSPARENT PLATE SURFACE
Title (en)
DETECTOR OF STAINS ON A TRANSPARENT PLATE SURFACE
Title (de)
SENSOR FÜR SCHMUTZ AUF EINER FLÄCHE EINER DURCHSICHTIGEN PLATTE
Title (fr)
DETECTEUR DE SALISSURES SUR LA SURFACE D'UNE PLAQUE TRANSPARENTE
Publication
Application
Priority
- FR 9903171 W 19991215
- FR 9816615 A 19981230
Abstract (en)
[origin: FR2788131A1] The invention concerns a detector of stains on a transparent plate (1) surface (3). Said detector, arranged on the plate (1) internal surface (2), comprises means emitting (4) a modulated light signal (S) towards the plate (1) inside and means receiving (5) said signal, after it has been reflected on the plate (1) external surface (3). An optical unit (9), made with a material having an index substantially higher than (1), is arranged on the plate (1) internal surface (2). It is made up of at least three faces returning the light signal (14, 15, 18) and an interface (16) with the plate (1) internal surface (2) through optical coupling means (7). Means for deflecting (L1, L2, R1, R2) the signal (S) direct the signal (S) from the emitting means (4) towards the plate (1) and from the unit (9) towards the receiving means (5). At least two reflections (10 to 12), on the plate (1) external surface (1) are produced through the optical coupling means (7) without reflection on said plate (1) internal surface (2).
IPC 1-7
IPC 8 full level
B60S 1/08 (2006.01); G01B 11/30 (2006.01); G01N 21/17 (2006.01); G01N 21/88 (2006.01); G01V 8/12 (2006.01)
CPC (source: EP US)
B60S 1/0822 (2013.01 - EP US); B60S 1/0837 (2013.01 - EP US); G01N 21/8806 (2013.01 - EP US)
Citation (search report)
See references of WO 0040443A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
FR 2788131 A1 20000707; FR 2788131 B1 20010216; EP 1140581 A1 20011010; JP 2002534662 A 20021015; US 6614015 B1 20030902; WO 0040443 A1 20000713
DOCDB simple family (application)
FR 9816615 A 19981230; EP 99959487 A 19991215; FR 9903171 W 19991215; JP 2000592170 A 19991215; US 86962001 A 20010910