Illuminating device for reducing unevenness in illuminance on an irradiation target face
First Claim
1. An illuminating device having a light source for illuminating an irradiation target face with light, the illuminating device comprising:
- a transmission light amount adjusting unit arranged between the light source and the irradiation target face, the transmission light amount adjusting unit configured to adjust a transmission light amount so as to make a uniform illuminance distribution on the irradiation target face, whereinthe transmission light amount adjusting unit comprises a light transmission plate laminate member having a plurality of light transmission plates that are constant in transmittance in a wavelength range of light to be transmitted therethrough,the plurality of light transmission plates are stacked by a stack number of the light transmission plates corresponding to an adjustment amount of the transmission light amount so as to reflect incident light at each boundary of front and back surfaces of each of the plurality of light transmission plates of the transmission light amount adjusting unit, andeach of the plurality of light transmission plates is configured to be thinner in accordance with the stack number so that the whole thickness of the light transmission plate laminate member is constant.
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Accused Products
Abstract
An illuminating device that can reduce illuminance unevenness of an irradiation target face with a simple construction is provided. In a pseudo sunlight illuminating device 1 having a lamp 22 for illuminating an irradiation target face 10A, a transmission light amount adjusting unit 60 for adjusting a transmission light amount so that the illuminance distribution on the irradiation target face 10a is made uniform is provided between the lamp 22 and the irradiation target face 10A, and the transmission light amount adjusting unit 60 is provided with a light transmission plate laminate member 64 which is constructed by stacking light transmission plates 65 which are constant in transmittance in a wavelength range of light to be transmitted and whose number corresponds to an adjustment amount of the transmission light amount so that incident light is reflected at each boundary of the front and back surfaces of each light transmission plate 65.
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Citations
10 Claims
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1. An illuminating device having a light source for illuminating an irradiation target face with light, the illuminating device comprising:
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a transmission light amount adjusting unit arranged between the light source and the irradiation target face, the transmission light amount adjusting unit configured to adjust a transmission light amount so as to make a uniform illuminance distribution on the irradiation target face, wherein the transmission light amount adjusting unit comprises a light transmission plate laminate member having a plurality of light transmission plates that are constant in transmittance in a wavelength range of light to be transmitted therethrough, the plurality of light transmission plates are stacked by a stack number of the light transmission plates corresponding to an adjustment amount of the transmission light amount so as to reflect incident light at each boundary of front and back surfaces of each of the plurality of light transmission plates of the transmission light amount adjusting unit, and each of the plurality of light transmission plates is configured to be thinner in accordance with the stack number so that the whole thickness of the light transmission plate laminate member is constant. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An illuminating device having a light source for illuminating an irradiation target face with light, comprising:
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a light diffusion unit for diffusing light so as to make a uniform illuminance distribution on the irradiation target face, the light diffusion unit is provided between the light source and the irradiation target face, wherein the light diffusion unit comprises a first and second multi-layer light diffusion spaced from each other member, the first multi-layer light diffusion member is spaced apart from the second multi-layer light diffusion member, the first multi-layer light diffusion member comprises an illuminance adjusting plate that is configured to be changeable in position or size for adjusting local illuminance unevenness, and the first multi-layer light diffusion member is located at the light source side. - View Dependent Claims (8, 9, 10)
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Specification