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US 6,058,271 AGranted
Illumination device
AssigneeCanon Kabushiki Kaisha
InventorYoshiharu Tenmyo
Life of this patent
Estimating the term…
Abstract
An illumination device for photography includes a guide part arranged to guide, through the inside of a dense member, a light emitted from a flash light emitting part disposed in a camera body and to cause the light to exit from a position located away from the camera body. The member is shaped in such a way as to enhance the illuminating efficiency of the illumination device by converging the light in the process of guiding the light. The illumination device is thus arranged to be capable of preventing a red-eye phenomenon without lowering the illuminating efficiency and without incurring a complex structural arrangement.
Claims44
An illumination apparatus comprising:
- light-emitting device, said light emitting device having an elongated shape;
- and
- an optical member for guiding, through a material, light emitted from said light-emitting device in a longitudinal direction of said optical member and converging the light while passing through the material so as to radiate the light emitted from said light emitting device toward an object,
- wherein said optical member:
- includes at least a portion of the material which continuously increases in cross sectional area in an advancing direction of the light guided through the material;
- has one cross-section at the light entering portion in the light advancing direction having a predetermined elongated continuous shape;
- and is arranged in such a manner that the lengthwise direction of the cross-section in the light advancing direction at the light entering portion coincides with the lengthwise direction of the light emitting device.
4 more elements
A camera comprising:
- light-emitting device, said light emitting device having an elongated shape;
- and
- an optical member for guiding, through a material, light emitted from said light-emitting device in a longitudinal direction of said optical member and converging the light while passing through the material so as to radiate the light emitted from said light emitting device toward an object,
- wherein said optical member includes:
- at least a portion of the material which continuously increases in cross sectional area in an advancing direction of the light guided through the material;
- has one cross-section at the light entering portion in the light advancing direction having a predetermined elongated continuous shape;
- and is arranged in such a manner that the lengthwise direction of the cross-section in the light advancing direction at the light entering portion coincides with the lengthwise direction of the light emitting device.
4 more elements
A camera comprising:
- a light-emitting device disposed in a camera body, said light emitting device having an elongated shape;
- and
- an optical member for guiding, through a material, light emitted from said light-emitting device, wherein said optical member:
- includes a light emission portion which emits the light from the material in a second direction different from a first direction which is an advancing direction of the light as the light is introduced from the light-emitting device into the material of the optical member, a first guide portion which guides the light in the first direction through the materials, a second guide portion which guides the light in the second direction through the material, said first guide portion being longer than said second portion;
- has one cross-section at the light entering portion in the light advancing direction having a predetermined elongated continuous share;
- and is arranged in such a manner that the lengthwise direction of the cross-section in the light advancing direction at the light entering portion coincides with the lengthwise direction of the light emitting device.
3 more elements
An illumination apparatus, comprising:
- a light-emitting device, said light emitting device having an elongated shape;
- and
- an optical member for guiding, through a material, light emitted from said light-emitting device, wherein said optical member:
- includes a light emission portion which emits the light from the material in a second direction different from a first direction which is an advancing direction of the light as the light is introduced from the light-emitting device into the material of the optical member, a first guide portion which guides the light in the first direction through the material and a second guide portion which guides the light in the second direction through the material, said first guide portion being longer than said second portion;
- has one cross-section at the light entering portion in the light advancing direction having a predetermined elongated continuous shape;
- and is arranged in such a manner that the lengthwise direction of the cross-section in the light advancing direction at the light entering portion coincides with the lengthwise direction of the light emitting device.
3 more elements
An illumination apparatus comprising:
- light-emitting device, said light emitting device having an elongated shape;
- and
- an optical member for guiding, through a material, light emitted from said light-emitting device in a longitudinal direction of said optical member and converging the light while passing through the material so as to radiate the light emitted from said light-emitting device toward an object,
- wherein said optical member:
- includes an emission portion for emitting the light from the material and an entrance portion for entrance of the light from the light-emitting device, said emission portion having a cross sectional area larger than that of the entrance portion;
- has one cross-section at the light entering portion in the light advancing direction having a predetermined elongated continuous shape;
- and is arranged in such a manner that the lengthwise direction of the cross-section in the light advancing direction at the light entering portion coincides with the lengthwise direction of the light emitting device.
4 more elements
Camera comprising:
- light-emitting device, said light emitting device having an elongated shape;
- and
- an optical member for guiding, through a material, light emitted from said light-emitting device in a longitudinal direction of said optical member and converging the light while passing through the material so as to radiate the light emitted from said light-emitting device toward an object,
- wherein said optical member:
- includes an emission portion for emitting the light from the material and an entrance portion for entrance of the light from the light-emitting device, said emission portion having a cross sectional area larger than that of the entrance portion;
- has one cross-section at the light entering portion in the light advancing direction having a predetermined elongated continuous share;
- and is arranged in such a manner that the lengthwise direction of the cross-section in the light advancing direction at the light entering portion coincides with the lengthwise direction of the light emitting device.
4 more elements
Dependencies are inferred from the claim text.