| 摘要 |
PURPOSE: A device for guiding ring light of camera is provided to prevent the generation of shadow areas in concave and convex portions or holes of a mechanical part by emitting light from a plurality of points on an equal line in a lens-photographing direction, thereby realizing the precise photographing and reading of the part. CONSTITUTION: A device for guiding ring light of camera includes a housing(11) detachably coupled with a camera coupling adaptor(27) at a side of a rear surface and formed with an adaptor coupling hole(19) in accordance with an axis of the camera, a light receiving element mounted facing a light source of the camera for receiving light, a light path changing element for guiding the path of the light to be radiated to a subject on a line equal to an axis of a camera lens, and a radiation amount controller for controlling the amount of light radiated to the subject according to a distance to the subject. The radiation amount controller includes a first polarization filer(41) in the ring-shaped, which is disposed to an output part of the light path for passing linear polarization component of the radiated light, and a second polarization filter(43) disposed to the adaptor coupling hole for receiving light reflected from the subject after radiated to the subject via the first polarization filter and projecting the reflected light to the lens. |
