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US 8,911,115 B2Granted
Irradiation device
AssigneeIwasaki Electric Co., Ltd.
InventorsDaisuke Ogawa, Kentarou Oohashi, Kazuyoshi Yamada, Katsumi Kimura
Life of this patent
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Abstract
One spectrum correction filter that changes a spectral characteristic of emission light from the light source, at least one neutral density filter disposed on the same optical axis of the spectrum correction filter, wherein the at least one spectrum correction filter and/or the at least one neutral density filter is tilted so that a travel direction of reflection light reflected from the at least one spectrum correction filter is deviated from the optical axis.
Claims9
An irradiation device, comprising:
- a light source that emits light having a predetermined spectral characteristic;
- at least one spectrum correction filter that converts the predetermined spectral characteristic of the emission light emitted from the light source to a spectral characteristic of sunlight;
- and
- at least one neutral density filter disposed on the same optical axis as the at least one spectrum correction filter, wherein at least either the at least one spectrum correction filter or the at least one neutral density filter is tilted with respect to the optical axis so that a travel direction of reflection light reflected from the at least one spectrum correction filter and at least one neutral density filter is deviated from the optical axis.
1 more element
An irradiation device comprising:
- a light source;
- at least one spectrum correction filter that changes a spectral characteristic of emission light emitted from the light source;
- and
- at least one neutral density filter disposed on the same optical axis as the at least one spectrum correction filter,
- wherein the at least one spectrum correction filter and the at least one neutral density filter are tilted in opposite directions with respect to the optical axis while the tilt angles of the at least one spectrum correction filter and the at least one neutral density filter are variable independently of each other so that a travel direction of reflection light reflected from the at least one spectrum correction filter and at least one neutral density filter is deviated from the optical axis.
2 more elements
Dependencies are inferred from the claim text.