Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Reexamination Certificate
2005-11-15
2005-11-15
Ben, Loha (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
C359S637000, C359S618000, C359S629000, C359S276000, C359S278000, C359S279000
Reexamination Certificate
active
06965479
ABSTRACT:
A first optical system (11) has a first beam splitter (211). The first beam splitter (211) splits light arriving through a first optical path (P1) into two light beams, and outputs one light beam to a second optical path (P2) and the other light beam to a third optical path (P3). A second optical system (21) outputs the light output from the first beam splitter (221) to the second optical path (P2) and arriving at the second optical system (21) upon giving the light an intensity change with wavelength dependence and a phase change, and has a second beam splitter (221), first reflecting mirror (223), and second reflecting mirror (222). This makes it possible to provide an optical filter (200) which can realize a characteristic excellent in isolation with a very simple arrangement.
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patent: 6108140 (2000-08-01), Hashimoto et al.
patent: 2001-194543 (2001-07-01), None
patent: 2001-333015 (2001-11-01), None
Benjamin B. Dingel, “Multi-Function Optical Filter using Michelson-GYT Interferometer”, The Institute of Electronics, Information and Communication Engineers, Technical Report of IEICE, OSC97-50, ED97-140, OPE97-95, LQE97-95 (Nov. 1997), pp. 67-72.
Iimura Tetsuya
Kenmochi Tamoya
Sano Tomomi
Shiozaki Manabu
Suganuma Hiroshi
Ben Loha
Dinh Jack
McDermott Will & Emery LLP
Sumitomo Electric Industries Ltd.
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