| 摘要 |
An optical device comprising a lens and an adjustable lens holder which is adapted to be positioned on an existing slit lamp biomicroscope such that the lens may be selectively positioned in the path of the illuminating light beam from the slit lamp light source. In one embodiment of the invention, the adjustable holder is designed to be rotatably positioned in association with the slit lamp light illumination apparatus and in relation to the projecting or objective lens of the slit lamp illumination system. The lens holder is designed to pass a narrowed zone on support structures associated with the light illumination apparatus and to frictionally engage a portion of the support structure while allowing rotation of the lens into and out of the path of the illuminating light beam. Alternatively, as the design of the slit lamp biomicroscope varies, the lens holder may vary so as to allow frictional engagement with a portion of the illuminating light source structure, wherein the lens will be pivotable into and out of the path of the illuminating light beam adjacent the projecting lens of the slit lamp light source. The lens of the optical device can be made of glass or plastic, and the lens holder may be constructed so as to allow various lenses to be quickly and easily removed and replaced by another lens. Alternatively, the lens holder may be provided with a plurality of lenses which may be selectively positioned in the path of the illuminating light beam. Additionally, a plurality of the optical devices may be used with the same slit lamp biomicroscope to modify the optical characteristics of the light source selectively and efficiently. Modification may include filtering of the illuminating light or adding divergence of convergence to the light rays to achieve various desired optical characteristics.
|
