Patent ID: 9360205
Filing Date: 2016-06-07
CPC Classification: F21V,G03B,H01L,H04N

Claim Text:
1. A lighting apparatus for a vacuum apparatus, the lighting apparatus that is attached to an observation window for seeing the inside of a vacuum apparatus and illuminates the inside of the vacuum apparatus, wherein the lighting apparatus includes a coupling adapter that is removably coupled to the observation window via a coupling unit, an opening that is formed in a central part of the coupling adapter and allows the inside of the vacuum apparatus to be seen through the observation window, and a plurality of LEDs (light-emitting diodes) that are placed in the coupling adapter and face the observation window, and that the coupling adapter is formed of: a peripheral wall having a front end portion being located on the side where the observation window extending from the wall of the vacuum apparatus is located, and being fittable onto the outside of a peripheral wall of the observation window, a rear end portion located on the opposite side of the front end portion, and an intermediate portion located between the front and rear end portions, the peripheral wall extending in an axial direction; and a ring-shaped LED placement plate that is fixed to an inner periphery of the peripheral wall in the intermediate portion thereof and extends inward in a radial direction of the peripheral wall in such a way as to surround the opening, and the plurality of LEDs are placed on an opposite face of the LED placement plate, the opposite face facing the observation window.