Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Eroding workpiece of nonuniform internal electrical...
Reexamination Certificate
2005-04-25
2009-12-08
Wilkins, Harry (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Eroding workpiece of nonuniform internal electrical...
Reexamination Certificate
active
07628906
ABSTRACT:
A method of manufacture for optical spectral filters with omnidirectional properties in the visible, near IR, mid IR and/or far IR (infrared) spectral ranges is based on the formation of large arrays of coherently modulated waveguides by electrochemical etching of a semiconductor wafer to form a pore array. Further processing of said porous semiconductor wafer optimizes the filtering properties of such a material. The method of filter manufacturing is large scale compatible and economically favorable. The resulting exemplary non-limiting illustrative filters are stable, do not degrade over time, do not exhibit material delamination problems and offer superior transmittance for use as bandpass, band blocking and narrow-bandpass filters. Such filters are useful for a wide variety of applications including but not limited to spectroscopy, optical communications, astronomy and sensing.
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Kochergin Vladimir
Swinehart Philip
Lake Shore Cryotronics, Inc.
Mendez Zulmariam
Nixon & Vanderhye PC
Wilkins Harry
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