Optics: measuring and testing – By shade or color – With color determination by light intensity comparison
Patent
1986-07-31
1988-07-26
Westin, Edward P.
Optics: measuring and testing
By shade or color
With color determination by light intensity comparison
356311, 209577, H01K 300
Patent
active
047596309
ABSTRACT:
The invention is a lamp quality judgement apparatus and judgement method which judge quality by detecting the state of gas sealed in an electric lamp such as a gas-filled incandescent lamp, etc. in which gas with an Argon-Nitrogen mixture as its main component is sealed. More particularly, a lamp in which such gas is sealed is classified as a good product or as a bad product by imposing a high DC voltage or a high AC or pulsed voltage with a comparatively low frequency of 1 kHz or less across the lamp's valve and filament coil to produce discharge and emission, in the lamp, of a light in a wavelength region in the vicinity of 560 nm and judging the radiation state in this 560 nm light spectrum, i.e., the state of discharge in the lamp. The means employed for detecting the light spectrum radiation state include means for judging lamp quality by monitoring the temporal response characteristic in the light spectrum in the 560 nm wavelength region and means for effecting accurate judgement of lamps regardless of variations in the state of discharge in lamps by detecting the difference in intensity of the light spectra of two wavelength regions which are the light spectrum of a 560 nm wavelength region and a light spectrum of a wavelength region other than the 560 nm wavelength region.
REFERENCES:
patent: 3194110 (1965-07-01), Eppig et al.
IES Technial Paper No. 44, (1981): H. J. Eppig, "Appraisal of Incandescent Lamp Filling Gas Purity".
Akaishi Takao
Kihara Kunihiko
Nagai Masao
Sugiyama Haruo
Tsujihara Yasushi
Kabushiki Kaisha Toshiba
Shami Khaled
Westin Edward P.
LandOfFree
Lamp quality judgement apparatus and judgement method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lamp quality judgement apparatus and judgement method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lamp quality judgement apparatus and judgement method therefor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-255604