The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2012
Filed:
Apr. 02, 2008
Keiichiro Watanabe, Kasugai, JP;
Keiichiro Watanabe, Kasugai, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A composite luminous vessel containerhas a hollow and polycrystalline alumina capillaryand one or more transparent disk(s)of monocrystalline alumina. The polycrystalline alumina luminous container memberfunctions as a luminous part for a high intensity discharge lamp. Light is emitted from the inside of the polycrystalline alumina luminous memberand radiated through the transparent monocrystalline alumina disk to the outside. The light emitted through the transparent window has a low loss due to the scattering so that the lamp efficiency can be improved. In the case of the light emitted through the transparent monocrystalline alumina, the size of the light source is substantially equal to the distance between the electrodes, so that the light source can be utilized as a point light source. The light emitted from the point light source can be subjected to optical control by combination with reflectors or lenses.