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Light reflection device and camera with said device

A technology of light-emitting devices and light refraction, applied in optical components, instruments, optics, etc.

Inactive Publication Date: 2005-06-22
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not always possible to control the lighting range in an ideal manner since the lighting range is only controlled in the longitudinal direction

Method used

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  • Light reflection device and camera with said device
  • Light reflection device and camera with said device
  • Light reflection device and camera with said device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The present invention will be specifically described below with reference to the drawings showing the embodiments.

[0039] Figures 1 to 6 A lighting device as a light emitting device according to a first embodiment of the present invention is shown. figure 1 with 2 In order to show the basic part of the optical system of the lighting device, the horizontal longitudinal sectional view, and image 3 with 4 is a vertical longitudinal sectional view showing essential parts of the optical system of the lighting device. Figure 5 is a perspective view showing only the main optical system of the lighting device, and Image 6 is a perspective view showing a camera with the lighting device. Figures 1 to 4 Also shown is the path of a typical ray emitted from a light source.

[0040] First, the overall structure of a camera having the lighting device will be described. Such as Image 6 As shown in , the lighting device 1 is telescopically placed on the upper part of a c...

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PUM

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Abstract

Provided is a light emitting device capable of changing illumination angles in lateral and vertical directions. A lighting element includes at least one arc tube extending in the longitudinal direction and a reflective umbrella. A light-transmitting optical element is placed in front of the light-emitting element closer to the side of the body, so that the relative distance between the optical element and the light-emitting element can be changed. The optical element includes a plurality of light refracting portions positioned in the middle and disposed in the longitudinal direction of the arc tube, and reflective surfaces positioned on opposite sides of the light refracting portions in the longitudinal direction for directing light from the light emitting element Reflected toward a subject. The light distribution characteristics can be changed in lateral and vertical directions by changing the interval between the light emitting element and the optical element.

Description

technical field [0001] The present invention relates to a light emitting device capable of changing the illumination range, and a camera with the device. Background technique [0002] Conventionally, there have been various lighting devices used in photographic devices such as cameras for effectively converging light beams emitted from a light source in various directions within a desired viewing angle of view. [0003] Especially in recent years, collection efficiency has been improved and the size of photographic devices has been reduced by providing optical members, light guides, etc. that perform total reflection on one lens instead of a Fresnel lens that is usually placed in front of a light source. [0004] In recent years, photographing devices such as cameras have been reduced in size and weight, and the zoom factor of photographing lenses has been increased. In general, the full-aperture f-number of a taking lens tends to increase incrementally as the size of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B15/02G02B6/00G02B19/00G03B15/03G03B15/05H01J61/02
CPCG03B15/05G03B2215/0507H01J61/025G03B15/03
Inventor 天明良治
Owner CANON KK