Holium Oxide Filter & Holium Didynium Filter

 Holmium Oxide, Certified, Glass Filter

(for checking the wave length accuracy)
Starna Part No.: RM-HG
Wave Length (NM): 279, 361, 454, 536, 638
Mounted in a "Stress Free" proprietary NIST design
Supplied in a wooden box

Didynium, Certified, Glass Filter

(for checking the wave length accuracy & photometric accuracy)
Starna Part No.: RM-DG
Wave Length (NM): 329, 472, 525, 681, 875
Mounted in a "Stress Free" proprietary NIST design
Supplied in a wooden box

Inorganic Cut-Off Filters - UV Stray Light

Starna Part No.: RM-KC
Cut off: 200 nm
Potassium Chloride Concentration : 1.2% aqueous