OPTICAL DETECTION DEVICE

WIPO Patent Application WO2003100365

A3

Disclosed is an optical detection device for detecting an intensity of a light beam in a detection window (15) and for collecting data transmitted by the light beam. Said optical detection device comprises a first detection diode (25), an array of at least two second detection diodes (21a-24d) located within a detection window, a first readout circuit (35) which reads out the first detection diode at a first readout speed so as to collect the data, and a second readout circuit (30) which reads out the second detection diodes at a second readout speed that is smaller than the first readout speed so as to detect the intensity of the light beam. The invention is characterized by the fact that the array of additional detection diodes located within the detection window makes it possible to control in a more effective and technically less complex manner the alignment of the light beam transmitting the data with the detection window, a fact that outweighs the initial additional expense caused by providing the optical detection device with additional detection diodes in the detection window and the resulting reduction of the surface of the detection window, which can effectively be used for collecting data.

HEHEMANN INGO (DE)
BROCKHERDE WERNER (DE)
KEMNA ARMIN (DE)
HOFMANN HOLGER (DE)
RICHTER HARTMUT (DE)

PCT/EP2003/005379

June 24, 2004

May 22, 2003

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FRAUNHOFER GES FORSCHUNG (DE)
THOMSON BRANDT GMBH (DE)
HEHEMANN INGO (DE)
BROCKHERDE WERNER (DE)
KEMNA ARMIN (DE)
HOFMANN HOLGER (DE)
RICHTER HARTMUT (DE)

G11B7/13; G11B7/125; (IPC1-7): G11B7/00; G11B7/13; G11B7/22; G11B7/005; G11B7/09

EP0405670A1	1991-01-02
EP0556000A1	1993-08-18
US5774432A	1998-06-30
US5701283A	1997-12-23
US5566151A	1996-10-15
EP1028412A1	2000-08-16

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