LIGHT INTEFERENCE FILM AND LAMP

An automotive lamp comprises a glass bulb (1) having a filament (5) and a light interference film (2) formed on the surface of the glass bulb (1). The light interference film (2) has a high-refractive index layer (11) and a low-refractive index layer (12) alternately stacked on each other. Each laye...

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Bibliographic Details
Main Author KAWAKATSU, AKIRA
Format Patent
LanguageEnglish
Korean
Published 13.11.1995
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
BLASTING
ELECTRIC INCANDESCENT LAMPS
ELECTRICITY
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF
HEATING
LIGHTING
MECHANICAL ENGINEERING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR
WEAPONS
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Summary:An automotive lamp comprises a glass bulb (1) having a filament (5) and a light interference film (2) formed on the surface of the glass bulb (1). The light interference film (2) has a high-refractive index layer (11) and a low-refractive index layer (12) alternately stacked on each other. Each layer (11, 12) has a refractive index ni and a thickness di, wherein i is equal to 1, 2, ... k. In this case, nidi is equal to (1+/-0.025)n2d2, wherein i is equal to 3 SIMILAR (k-1), n1d1 is equal to (1+/-0.025)n2d2, and nkdk is equal to (1+/-0.025)n2d2. The maximum value of the reflectance of the film (2) is more than 91% within visible light range, and the 50% transmitting wavelength is from 515 nm to 542 nm.
Bibliography:Application Number: KR19910004599