UV irradiation appts. for treatment of skin disorders - uses ozone-less mixed quartz glass for lenses each with hardened glass filter

摘要

The u.v. irradiation on appts. is for the treatment of dandruff and other skin disorders, having one or more mercury-vapour lamps with quartz glass lenses. An ozoneless mixed quartz glass is used for the lenses, so designed that emission takes place at a wavelength of approx. 280 nm. Each lens (3) has a hardened glass filter (4) so that in the fully effective final position of the filter radiation below roughly 300 nm is filtered out.