Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2005-02-22
2005-02-22
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S227110, C257S432000, C438S065000
Reexamination Certificate
active
06858828
ABSTRACT:
A photocell having an entry face for the light and a photosensitive element, as well as to a matrix composed of such photocells. A lightguide-forming element placed between the entry face and the photosensitive element of the photocell ensures optical coupling between the latter two components. It makes it possible to place on either side of the photosensitive element electronic components for reading and for controlling the photocell, while reducing the loss of light incident on the entry face corresponding to the rays which would strike these electronic components. This lightguide-forming element is composed of at least three dielectric materials having different respective optical refractive indices and placed within concentric volumes.
REFERENCES:
patent: 5321249 (1994-06-01), Nomura
patent: 5952645 (1999-09-01), Wang et al.
patent: 6127668 (2000-10-01), Baek
patent: 20040159774 (2004-08-01), Mishina et al.
patent: 61049466 (1986-03-01), None
patent: 06169075 (1994-06-01), None
patent: 10154805 (1998-06-01), None
patent: 2001237405 (2001-08-01), None
Van Zant, P., “Microchip Fabrication—A Practical Guide to Semiconductor Processing”,Basic Patterning—Developing to Final Inspection, Chapter 9, pp. 256-280, 2000.
French Preliminary Search Report dated Jul. 19, 2002 for French Application No. 0112051.
Devoivre Thierry
Marcellier Yann
Roy François
Fleit Kain Gibbons Gutman Bongini & Bianco P.L.
Gibbons Jon A.
Jorgenson Lisa K.
Pyo Kevin
STMicroelectronics S.A.
LandOfFree
Photocell incorporating a lightguide and matrix composed of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photocell incorporating a lightguide and matrix composed of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photocell incorporating a lightguide and matrix composed of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3500055