Biomedical subjects
Publications and source records attributed to D L Sosnov.
The paper gives information on the new illuminator for endoscopic apparatuses, which provides higher light optic and electric characteristics than do its existing analogues. It also presents the specific features of the illuminator and compares the technical data of the new illuminator and its analogues.
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The author relates approaches to enhancing the effectiveness and safety of the lighting system of endoscopes. The optical and structural diagrams of the lighting unit for endoscopes have been devised. Pilot items of the lighting units based on an illuminating lamp 15-150, intended for flexible and rigid endoscopes of new generation have been manufactured. The unit provides for increasing the life of low-voltage filament lamp as well as for their work in the nominal mode within the range of the mains voltage fluctuations +/- 10% over the whole life.
The paper gives a calculation method for a lighting optical device consisting of light flux concentrator lamps rigidly installed in an ellipsoid reflector with heat-permeable coating, and the parameters of two big concentrator lamps for fibre endoscopes.
An analytical relationship has been established between the electric parameters of an illuminator and the lighting parameters and the service life of halogen lamps when operating on industrial mains power supplies. The paper shows a way of improving the above characteristics to provide comfortable working conditions and to enhance labour productivity by applying the constant power sources with the preset voltage stabilization factor. Plots of luminous flux instability and service life against voltage stabilization factor have been constructed from the derived formulas for a K[symbol see text]15-150 halogen filament. Recommendations are given to calculate a stabilization factor for a constant power source.
A new-generation portable OC-150-03 illuminator has been proposed for endoscopic equipment with light guides. The specifications of the illuminator are presented.