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NOTCam Z filter

NOT filter number:237
Dimensions:25-mm round.
Status:mounted
Filter name:Z
Marking on filter edge:
Cosmetic defects:


on: 0.830 micron
central: 0.878
off: 0.927 micron
FWHM: 0.097 micron


  • Transmission curves: Z-band zoom, Z-band, ASCII data

    Note:These transmission data have been scanned from the manufacturer's hardcopy. They are probably good to a couple of %. Details of the scanning procedure are not known, but the scan was made at ambient temperature. A small shift to the blue will be effected at operating temperature (see Shift with temperature plot).

    Z-band filter manufactured at NDC IR Engingeering according to specifications, which were set to be as identical to the UKIRT/WFCAM Z-band as possible. Purchased in 2010. Certificate of Conformance.

    NB! This filter has a strong red leak well beyond the K-filter wavelength range, i.e. beyond 2.4 microns, giving rise to a high background dominated by thermal emission. See Z and Y filter commission report for details.
    • Back to top Last modified: June 28 2023