anx_III__table__30

X.A.IV.004 | Optics as follows: Note: X.A.IV.004 does not control optical filters with fixed air gaps or Lyot-type filters. a. Optical filters: 1. For wavelengths longer than 250 nm, comprised of multi-layer optical coatings and having either of the following: a. Bandwidths equal to or less than 1 nm Full Width Half Intensity (FWHI) and peak transmission of 90 % or more; or b. Bandwidths equal to or less than 0,1 nm FWHI and peak transmission of 50 % or more; 2. For wavelengths longer than 250 nm, and having all of the following: a. Tunable over a spectral range of 500 nm or more; b. Instantaneous optical bandpass of 1,25 nm or less; c. Wavelength resettable within 0,1 ms to an accuracy of 1 nm or better within the tunable spectral range; and d. A single peak transmission of 91 % or more; 3. Optical opacity switches (filters) with a field of view of 30o or wider and a response time equal to or less than 1 ns; b. “Fluoride fibre” cable, or optical fibres therefor, having an attenuation of less than 4 dB/km in the wavelength range exceeding 1 000 nm but not exceeding 3 000 nm; Technical Note: For the purpose of X.A.IV.004.b “Fluoride fibres” are fibres manufactured from bulk fluoride compounds.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-15 · Text as adopted (Official Journal); later amendments are not incorporated in this text.