Optical: systems and elements – Having significant infrared or ultraviolet property – Multilayer filter or multilayer reflector
Reexamination Certificate
2008-07-29
2008-07-29
Allen, Stephone B. (Department: 2872)
Optical: systems and elements
Having significant infrared or ultraviolet property
Multilayer filter or multilayer reflector
C359S584000, C359S585000, C359S589000, C359S839000, C252S588000
Reexamination Certificate
active
07405873
ABSTRACT:
A UV-bandpass filter for transmitting therethrough light having a wavelength included in a UV-region. The bandpass filter is an optical filter including a thin silver film; wherein the thin silver film includes an entrance face and an exit face opposing the entrance face, for emitting light having a wavelength included in a specific UV-region whose wavelength ranges from 250 nm to 400 nm in the light having reached the entrance face, and has such a thickness as to yield a transmittance of 10% or less with respect to light having a wavelength excluding the specific UV-region.
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Morishita Masaru
Sakakibara Masayuki
Allen Stephone B.
Chapel Derek S
Drinker Biddle & Reath LLP
Hamamatsu Photonics K.K.
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