Optical: systems and elements – Lens – With multipart element
Reexamination Certificate
2008-07-08
2008-07-08
Harrington, Alicia M (Department: 2873)
Optical: systems and elements
Lens
With multipart element
C385S037000
Reexamination Certificate
active
11401333
ABSTRACT:
An optical communication module includes a first light-receiving element with a receiving surface in which a light flux with a wavelength λ1emitted from an end surface of an optical fiber enters; a light-emitting element for emitting a light flux with a wavelength λ2; and a first optical element arranged between the first light-receiving element and the light-emitting element, and the end surface of the optical fiber. The first optical element includes a first optical surface with a positive refractive power and a second optical surface having a diffractive structure. One of the first optical surface and the second optical surface is divided into at least a first optical functional surface and a second optical functional surface through a step difference.
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Dammann H., “Color Separation Gratings”, Applied Optics, vol. 17, No. 15, Aug. 1978, pp. 2273-2279.
Atarashi Yuichi
Mori Nobuyoshi
Nagai Fumio
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Harrington Alicia M
Konica Minolta Opto Inc.
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