Patent · US Expired

Fabry-perot with device mirrors including a dielectric coating outside the resonant cavity

US5381232A · kind A · utility

233Cited by
2References
18Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 18, 1993
Grant dateJan 10, 1995
Priority date—
Expiry dateMay 18, 2013

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B5/284
  • WIPO fieldOptics
  • WIPO sectorInstruments

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, 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.