Bandpass glass
Neutral density glass filter
Optical glass filter (ND filter) “AB series” is a filter that cuts the visible light region at a certain rate. Since it cuts almost evenly for all wavelengths, it looks achromatic. Use it to adjust the power of the irradiation light.
Optima Inc.
1-48-11 Itabashi, Itabashi-ku, Tokyo 173-0004
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