optical system, <of a light-emitting sign>

arrangement of optical or other components which form elements of a light-emitting sign

Note 1 to entry: The optical system is deemed to include the source, optical components including front screens, filters or lenses where these are appropriate.

Note 2 to entry: This entry was numbered 17-849 in CIE S 017:2011.

Publication date: 2020-12
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