Filter for a low-pressure mercury vapor lamp

Details Filter for a low-pressure mercury vapor lamp Filter for a low-pressure mercury vapor lamp

1992-10-26

1993-11-16

Ben, Loha

Optical: systems and elements

Absorption filter

250398, 250504R, 313 44, 313112, 313565, G02B 522

Patent

active

052629023

ABSTRACT:
A filter for absorbing radiation of a selected wave length emitted from a mercury vapor lamp is disclosed. The filter comprises a device for providing an ozone-containing gas layer positioned between the mercury vapor lamp and an object to be illuminated, which may be formed by providing a transparent space filled with the ozone-containing gas between the lamp and the object. This provides a relatively large sized filter which has a simple construction.

REFERENCES:
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patent: 4054812 (1977-10-01), Lessner et al.
patent: 4143468 (1979-03-01), Novotny et al.
patent: 4591958 (1986-05-01), Lamboo
patent: 4636686 (1987-01-01), Vrieze
patent: 4924142 (1990-05-01), Kaldenhoven
Patent Abstracts of Japan, vol. 5, No. 204 (C-085) Dec. 24, 1981 and JP-A-56 125 207 (Toshiba Corp) Oct. 1, 1981.
"Ozone Absorption Coefficients in the Visible and Ultraviolet Regions", Advances in Chemistry Series, pp. 263-268.
"Irradiated Lithium Fluoride as an Optical Filter in the Far Ultra-Violet", Nature, Sep. 16, 1961, vol. 191.
"Experimental Technique for Quantitative Study of Photochemical Reactions", J. Phy. Chem., vol. 32, 1928.
"Die Bestimmung der Lichtintensitat von Niederdruck-Quecksilberlampen bei 1849 .ANG.", Z. Natrufosch, vol. A19, 1964.
"Vacuum Ultraviolet Photochemistry", Advances in Photochemistry, vol. III.
"Ozone Filter for Selecting 185-nm Radiation from Mercury Vapor Lamps", The Journal of Physical Chemistry, vol. 74, No. 24, 1970.

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