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Intereference Filter , 644 nm Extreme narrow-band filter for cadmium spectral line. Insert into filter wheel with diaphragm (558 792) or holder für interference filters (468 41). Technical Data: • Median wavelength : λ = 643,8 nm ±2 nm • Half-value width : approx. 13 nm • Transmission (λ = 644 nm) : approx. 50 % • Transmission outside of line :T < 0.01 % • Diameter : 25 mm • Diameter of holder : 28 mm
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$665.00