Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-03-07
2006-03-07
Porta, David (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S208100, C250S214100, C348S302000
Reexamination Certificate
active
07009165
ABSTRACT:
An optical detection device for detecting an intensity of a light beam in a detection window and for detecting data transmitted by the light beam includes a first detection diode and an array of at least two second detection diodes in a detection window. In addition, provision is made for a first readout circuit connectable to the first detection diode, for reading out the first detection diode at a first readout speed to detect the data, and for a second readout circuit connectable to the second detection diodes, for reading out the second detection diodes at a second readout speed smaller than the first readout speed, so as to detect the intensity of the light beam. A fundamental consideration underlying the present invention is that although the provision of additional detection diodes in the detection window initially is associated with additional expense and a reduction of the surface area of the detection window which may effectively be utilized for data detection, these disadvantages are outweighed however, by the fact that this array of additional detection diodes in the detection window enables more effective and/or less expensive control of the alignment of the light beam transmitting the data with the detection window.
REFERENCES:
patent: 4290122 (1981-09-01), Bates et al.
patent: 5566151 (1996-10-01), Bates et al.
patent: 5701283 (1997-12-01), Alon et al.
patent: 5774432 (1998-06-01), Alon et al.
patent: 0 405 760 (1991-01-01), None
patent: 0 556 000 (1993-08-01), None
patent: 1 028 412 (2000-08-01), None
Linten, et al. Integrated Optical Received With Beam Localisation. Electronics Letters. May 9, 2002. vol. 38. No. 10.
Freeman, et al. Robust Focus and Tracking Detection for Holographic Digital Versatile Disc Optical Pickup-Head Modules. Jpn. J. Appl. Phys. 1999. vol. 38. No. 3b.
Brockherde Werner
Hehemann Ingo
Hofmann Holger
Kemna Armin
Richter Hartmut
Deutsche Thomson-Brandt GmbH
Fraunhofer-Gesellschaft zur Forderung der ange-wandten Forschung
Glenn Michael A.
Glenn Patent Group
Lee Patrick J.
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