LAMP FOR EMITTING COLORED LIGHT

摘要

PROBLEM TO BE SOLVED: To provide a lamp for emitting colored light of which emission of the light having an undesired spectral region is reduced.

SOLUTION: The lamp includes a first region symmetric with respect to an axis, defining a sealed inner space; a second region structured as a sealing region, arranged adjacent to the first region: a light source arranged in the inner space, and electrically connected to the outside through the sealing region; and an interference filter coating formed outside of the first region. The interference filter coating defines a transparent spectral region, and a light absorption coating is formed on the outside of the first region. The optical absorption coating (7) has a ring-shaped part (71) and the ring-shaped part surrounds a part of the first region (21) adjoining the sealing region (22).

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