Hyper-spectral/continuously-tunable imager

Details Hyper-spectral/continuously-tunable imager Hyper-spectral/continuously-tunable imager

2006-12-12

2006-12-12

Evans, F. L. (Department: 2877)

Optics: measuring and testing

By shade or color

With color transmitting filter

C250S226000

Reexamination Certificate

active

07148967

ABSTRACT:
The invention employs a linear variable interference filter, which can be manually moved back and forth along its long axis in front of a slit parallel to its short axis. Thus, the filter pass-band varies linearly from 4,000 angstroms to 10,000 angstroms with a pass-band half-width no greater than 65 angstroms. Therefore, this combination of filter and slit can be placed in front of a charge coupled device (CCD) or other electro-optical imaging device and real time images can be taken as the filter is slid back and forth. Magnifying optics, beam-splitters and scale illuminators can be used to make the scale visible within the field of view of the camera imager. Or, as a simpler embodiment, the graduated image scale could in the form of a hologram of a graduated image scale taken at distance consistent with the desired depth of focus of the camera/imager.

REFERENCES:
patent: 6335759 (2002-01-01), Harada
patent: 6495818 (2002-12-01), Mao
patent: WO 97/42765 (1997-11-01), None

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