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infrared (IR)

Referring to radiant flux having wavelengths longer than the wavelengths of visible light, usually from ~700 nm to 1400 nm (~0.7 μm to 1.4 μm) as per the International Commission on Illumination (CIE) for IR-A.

Date Added to Lexicon
Standard Source (Designation Number Title of Standard. Publisher, Place, Year.)
ANSI/ASB Standard 035-20 Standard for the Examination of Documents for Alterations . AAFS Academy Standards Board (ASB), 410 North 21st Street, Colorado Springs, CO , 2020. Source link