| 摘要 |
FIELD: medicine. ^ SUBSTANCE: medical photometer can be used for measuring optical parameters of skin (light reflection and light absorption). Photometer is made on base of photometric sphere which collects all reflected radiation to semi-sphere from object to be measured. Radiation from lamp is focused by means of condenser into plane of entrance objective, which forms light spot with diameter of 16 mm and images frame of condenser in plane of exit opening of photometric sphere. Sample to be measured having diameter of 18 mm and bigger is mounted onto opening from outside photometric sphere. Radiation, after being integrated by photometric sphere, enters radiation receiver mounted at second output opening of sphere, which opening is orthogonal to first one. To eliminate influence of primary radiation, reflected from sample onto line connecting centers of receiver and first output opening of sphere, onto results of measurement, shutter is mounted. Internal surface of photometric sphere and shutter are covered with diffusion-dissipation enamel having high reflection coefficient. ^ EFFECT: improved truth of measurements. ^ 1 dwg |
