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Optical filter for spectroscopic measurement and method of producing the optical filter

  • US 5,940,182 A
  • Filed: 06/01/1998
  • Issued: 08/17/1999
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A method of manufacturing a rotating optical filter, said method comprising the steps of:

  • providing an optical substrate having a top surface and a bottom surface; and

    depositing layers of optical coatings on said top surface such that said layers vary linearly in thickness in a first direction across said top surface, said layers remaining substantially constant thickness across said top surface in a second direction substantially perpendicular to said first direction.

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