Tilt tunable ultra narrow-band filters for high resolution infrared photometry

The design and operating characteristics of several recently fabricated solid-spaced Fabry-Perot interference filters having bandwidths from 0.3 to 8 A in the 1-5-micron IR wavelength range are discussed. The 10,000 achievable resolving power of these devices, particularly at the higher wavelengths, represents several orders of magnitude improvement over conventional IR filters, and the implications of this very high resolution along with the tilt-tuning properties of narrow-band filters are discussed in relation to atmospheric remote sensing.