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Gratings are excellent low-pass filters, provided they have the appropriate mounting. The spectral reflectivity of filters composed of four gratings has been measured from the 0.2 mm to 2 mm wavelength region. The gratings were placed near a lens focus, where the beam section was smaller. The effect of nonparallel light was to smooth the cut-off edge of the filters. The measurements were in good agreement with the diffraction theory of gratings.

Additional information

Authors: TUDISCO O, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: RT/NUCL/90/38 EN (1991) 18 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199111276 / Last updated on: 1994-12-02
Original language: en
Available languages: en