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The
BPI UV Activator™, product code 109517, is a dual-purpose
device which can be used as a visual demonstration of the
effectiveness of UV blocking lenses and also to activate
photochromic lenses with ultraviolet light of intensity similar to
that in sunlight. The UV light source is discreetly baffled inside
the black metal box away from the direct view of the user. It
illuminates a white target which fluoresces brightly in the presence
of UV light. A UV-blocking lens will leave a dark shadow on the
fluorescent target. Photochromic lenses will be darkened by the UV
light at much the same rate as they would be by natural sunlight.
Lenses may be evaluated while still in the frames. |
