| 摘要 |
A portable apparatus having a source, a detector and a filtering element placed a known distance from the source and/or the detector. One embodiment of the apparatus is a headlamp having an illumination source, a camera, and two eye pieces. The headlamp has an adjustable headband for positioning the headlamp on the head of the user and a protective cover for interacting with the camera, eye pieces, and/or illumination source. The protective cover pr eferably includes multiple sets of filtering elements such that motion about or along an axis changes the filtering elements interacting with the camera , eye pieces, and/or the illumination source. |
