×

Attenuating filter for ultraviolet light

  • US 20050179996A1
  • Filed: 11/29/2004
  • Published: 08/18/2005
  • Est. Priority Date: 05/22/2001
  • Status: Active Grant
First Claim
Patent Images

1. An attenuating filter providing a prescribed attenuation of the intensity of transmitted ultraviolet light over a predefined wavelength range according to a predefinable spatial distribution of a spectral transmittance, the attenuating filter comprising:

  • a substrate fabricated from a transparent material; and

    at least one filter coating applied to a surface of the substrate;

    the filter coating comprising at least one layer fabricated from a dielectric material that absorbs over a predefined wavelength range, wherein the thickness, measured perpendicular to the surface of the substrate, of the filter coating varies continuously over the surface of the attenuating filter, whereby a spatial variation of the transmittance of the filter coating across the surface of the attenuating filter is obtained.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×