Micro-nano scale hetrodyne wavelength division...

Details Micro-nano scale hetrodyne wavelength division... Micro-nano scale hetrodyne wavelength division...

2005-04-05

2005-04-05

Johns, Andrew W. (Department: 2621)

Image analysis

Image sensing

Optical

C398S082000

Reexamination Certificate

active

06876781

ABSTRACT:
An oscillating microscopic or tomographic optical input image is directed at a tunable Bragg cell and a tuning control device applies a fluctuating AC hetrodyne signal to the cell, such signal having a phase locked template with respect to oscillation of the optical image, causing the cell to hetrodyne and correlate a phase locked matching template with the oscillating optical input image. A time integrating detector integrates output signals from the Bragg cell while illuminated point sources of the optical image are interconnected with corresponding imaging points upon the integrating detector via a high resolution holographic lens array within the Bragg cell. The array consists of recorded interference patterns between tiny one micron point sources of light produced by an optical fiber with broad wave fronts of light. A DC signal applied to the Bragg cell along with the AC signal enables beneficial wavelength discrimination and averaging.

REFERENCES:
patent: 5999671 (1999-12-01), Jin et al.
patent: 6043922 (2000-03-01), Koga et al.
patent: 6201638 (2001-03-01), Hall et al.

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