Fabry-perot with device mirrors including a dielectric coating o

Details Fabry-perot with device mirrors including a dielectric coating o Fabry-perot with device mirrors including a dielectric coating o

1993-05-18

1995-01-10

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

053812328

ABSTRACT:
In a Fabry-Perot etalon or interferometer the metal mirrors are each provided with a dielectric coating on the side facing away from the enclosed gap. The dielectric coating leads to the advantage of peak transmittance being improved without the finesse being adversely affected. The dielectric coating is transparent for the wavelength (.lambda.) used and, preferably, has a thickness of about 0.25.lambda.
, n being the refractive index of the dielectric coating material. The coating, preferably, is of a material having a high index of refraction, examples thereof including zirconium dioxide, titanium dioxide, zinc sulfide, or zinc selenide.

REFERENCES:
patent: 4400058 (1983-08-01), Durand et al.
patent: 4790634 (1988-12-01), Miller et al.
M. Born et al., "Principles of Optics", Pergamon Press, 4th ed. (1970), pp. 322-333.
Optik, vol. 50, No. 4 (1978) pp. 329-340.
Thin Solid Films, 137 (1986) Mar. 15, 1986, No. 2, pp. 161-168.
Annales de Physique, vol. 6 (1951) pp. 5-107.

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