A durable Aluminum alloy made matt black blue filter torch useful for demonstration of Blue Filter Lenses and its blue filter capacity. it works on 2 AAA sized battery (Not included here).
Also Known as Blueblock Torch, UV Torch, Bluecontrol Torch.
How to use
Shine the torch through a lens toward a suitable test card or reference surface and compare transmitted light between lens types. Do not look directly into the beam.
When to use
Use to demonstrate or compare the filtering response of blue-cut, blue-filter or blue-block lenses.
Where to use
Use at the dispensing counter or lens demonstration area with a test card or suitable reference surface.
