Illuminated meter

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the illumination meter according to the present invention will be described hereinbelow in detail with reference to the attached drawings.
In FIGS.
2(A) and (B), an illumination meter of the present invention comprises a rear housing 10, a dial plate 20 attached to the front side of the rear housing 10, a front housing 30 attached to the front outer periphery of the dial plate 20, a transparent meter cover (e.
g.
made of glass) 40 for covering the front housing 30, a movement body 50 fixed to the rear housing 10, an indication needle 60 fixed to a shaft 51 of the movement M, and an ultraviolet ray emitting lamp 70 for illuminating the needle 60 and various indication marks 21 such as characters, numerals, graduation marks, etc.
formed on the dial plate 20.
The outer surface of the needle 60 is coated with fluorescent substance or paint including fluorescent substance.
The dial plate 20 is colored by a dark color and the various indication marks 21 are coated with fluorescent substance or paint including the fluorescent substance.
Therefore, when illuminated by the ultraviolet rays emitted from the ultraviolet ray emitting lamp 70, the needle 60 and the indication marks 21 are excited so as to emit visible light.
The ultraviolet ray emitting lamp 70 is disposed on the upper inner peripheral surface of the front housing 30 so as to obliquely irradiate the outer surface of the dial plate 20 and the inner surface of the meter cover 40 with the ultraviolet rays emitted from the lamp 70.
The first feature of the illumination meter according to the present invention is to coat the inner surface of a glass plate 41 of the meter cover 40 with a film 42 which can selectively reflect rays with specific wavelengths corresponding to the ultraviolet ray but transmit rays with wavelengths corresponding to the visible light.
This transparent reflecting film 42 is a metallic film formed on the cover glass 41 by means of vacuum deposition technique or sputtering technique, etc