Didymium glass filter F7W (320 - 880 nm)

for checking wavelength accuracy

The didymium glass filter 666-F7W is made from material specially manufactured by Schott AG. Like holmium glass, didymium glass has a variety of characteristic peaks in the ultraviolet and visible range and is typically used for checking wavelength accuracy. Its peaks are not as narrow as those of holmium glass filters.

Typical spectrum of a Didymium glass filters, measured with a slit width of 1 nm.

ARTICLE-NO. 666F7W-323   Request this article
APPLICATION Checking the wavelength accuracy in the UV and Vis range
CONTENT Didymium glass with metal frame
STANDARD MEASUREMENT Wavelengths: 329, 472, 512, 681, 875 nm
Slit width: 1 nm; with DAkkS calibration certificate
with 1 nm slit width: 329, 430, 472, 482, 512, 681, 875 nm
with 2 nm slit width: 430, 472, 482, 512, 875 nm



The positions of didymium glass peaks may vary slightly depending on the glass batch used. This is why Hellma Analytics measures each didymium glass filter individually.

Optical Reference Materials (Brochure & User Manual EN)



Hellma USA Inc.
120 Terminal Drive
11803 Plainview, NY
United States

Phone: +1 5169 3908 88


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