Variable spectral resolution agile filter
First Claim
Patent Images
1. In a variable spectral resolution agile filter, comprising:
- a pair of windows at least partially transparent to electromagnetic radiation; and
tuning means for adjusting an optical path length between said windows to thereby change a center wavelength of the filter, the improvement wherein;
said filter includes finesse varying means for varying a finesse of the filter in order to vary its spectral resolution.
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Abstract
A variable spectral resolution agile filter has instantly adjustable spectral resolution with no required mechanical motion and a quickly adjustable center wavelength. Adjustment of the center wavelength is accomplished by reliable piezoelectric actuators. Adjustment of the spectral resolution is achieved by changing the finesse of the system, the finesse being governed by the reflectivity of the faces. By making one of the faces exhibit electrically variable reflectivity, the finesse of the system is instantly changeable, and thus the spectral resolution is also instantly changeable.
19 Citations
5 Claims
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1. In a variable spectral resolution agile filter, comprising:
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a pair of windows at least partially transparent to electromagnetic radiation; and tuning means for adjusting an optical path length between said windows to thereby change a center wavelength of the filter, the improvement wherein; said filter includes finesse varying means for varying a finesse of the filter in order to vary its spectral resolution. - View Dependent Claims (2, 3, 4, 5)
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Specification