DISPOSITIF D'ILLUMINATION DE SURFACE

摘要

A plurality of light emitting diodes are secured coaxially around the lower end of a cylindrical objective lens housing in radially spaced, circular arrays or rings disposed coaxially of the housing. The diodes in each ring are equi-angularly spaced from each other about the axis of the housing; and their light emitting ends overlie a work table so as to direct beams of light obliquely downwardly onto an object supported thereon. The diodes are energizable in generally pie-shaped sectors disposed coaxially of the housing so that arcuate clusters of diodes in a given segment may be illuminated to enable the orientation of the resultant illumination to be varied. The diodes of each ring may have their beam axes inclined at different angles to the axis of the housing so that the inclination of the projected illumination may be varied by selected energization of the rings; and a collimating lens may be secured over the light emitting end of each diode.