Patent ID: 6299310
Filing Date: 2001-10-09
Classification: A61B

Abstract:
Luminous intensity detection and control system for slit lamps and slit lamp projectors with non-split lenses of the kind of a stereo microscope, characterized in that in a slit lamp or a slit lamp projector an oblique thin glass flat with a partial reflection of the light is disposed at a defined angle relative to the optical path above the filter assembly consisting of a color neutral glass filter and a UV absorption filter between the latter and the ""slit projector"" lens in such a way that as a result one part of the incident rays is incident as deflected light cone on a detector or a detector assembly, respectively, which is arranged laterally in the housing at an angle relative to the center axis of the optical illumination path in the housing, which detector assembly measures the respectively existing luminous intensity, transmits the detected values to an evaluation and control means which compares the values so received against a predetermined maximum value, calculates the irradiation dose for the phakic or aphakic eye and, when the value is exceeded, signals this situation on an indicating alarm means and/or reduces the luminous intensity automatically to the predetermined maximum value in a controlled manner.