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Ultraviolet ray lamp and sterilizers and cleaners using the lamp

  • US 20020024278A1
  • Filed: 03/14/2001
  • Published: 02/28/2002
  • Est. Priority Date: 03/14/2000
  • Status: Active Grant
First Claim
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1. An ultraviolet ray lamp comprising:

  • a discharge vessel made of quartz glass having a filling gas therein;

    a pair of electrodes constructed and arranged to generate a discharge in the discharge vessel; and

    an optical filter including a metal oxide, which is formed on part of the outer surface of the discharge vessel, transmitting ultraviolet rays of long wavelength and blocking ultraviolet rays of short wavelength.

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