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666-F7W Didymium glass filter

Kalibrierstandards

The didymium glass filter 666-F7 is made special manufactured materials by the company SCHOTT. Just like holmium glass, didymium glass as well shows a multitude of characteristic peaks in the UV and Vis range. Therefore, it is usually used to check the wavelength accuracy. However, the peaks are not as narrow-band as the one of the holmium glass filter.

E_Holmium_Oxid_Flüssigfilter F7 Typical spectrum of a Didymium glass filter

Because the exact positions of the didymium peaks vary slightly for each production batch (movement due to the glass matrix), the filters are calibrated individually.

Article-no.666F7W-323
ApplicationAssessment of wavelength accuracy in both UV- and visigble range
ContentDidymium glass filter in metal frame
Standard certificationWavelength: 329; 472; 512; 681; 875 nm
Slit width: 1 nm
with DAkkS calibration certificate
Possible certificationsFurther wavelengths: 291; 302; 430; 446; 482; 626 nm
Slit width: all until 2 nm

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