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US 6,386,720 B1Granted
Light source device and optical apparatus
AssigneeCanon Kabushiki Kaisha
InventorNoritaka Mochizuki
Life of this patent
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Abstract
This specification discloses a light source device comprising a group of light emitting elements and adjusting means for individually adjusting the luminance of each light emitting element in the group of light emitting elements. The specification also discloses an optical device using such light source device to illuminate an object to be illuminated.
Claims10
A light source device comprising:
- a transparent plate-like member;
- and
- a plurality of light emitting elements arranged along a side surface of said transparent plate-like member,
- wherein light from said plurality of light emitting elements enters the interior of said transparent plate-like member from the side surface and emerges from a front surface of said transparent plate-like member, a plurality of grating-like portions are integrally formed on a back surface of said transparent plate-like member so as to cause light propagating in said transparent plate-like member to be scattered, said plurality of grating-like portions have the same height, the area of said grating-like portions becomes greater toward a direction away from the side surface of said transparent plate-like member.
1 more element
An optical element comprising:
- a transparent plate-like member;
- wherein light from a light source enters the interior of said transparent plate-like member from the side surface and emerges from a front surface of said transparent plate-like member, a plurality of grating-like portions are integrally formed on a back surface of said transparent plate-like member so as to cause light propagating in said transparent plate-like member to be scattered, said plurality of grating-like portions have the same height, the area of said grating-like portions becomes greater toward a direction away from the side surface of said transparent plate-like member.
Dependencies are inferred from the claim text.