l l l l l High radiant power and high radiant intensity Standard T-1 3/4 ( φ 5mm) package Peak wavelength λp = 940 nm Good spectral matching to si-photodetector Radiant angle : 35° 1.00 (.040) FLAT DENOTES CATHODE 23.4 0MIN. (.920) 0.50 TYP. (.020) 1.00MIN (.040) 2.54 (.100) A C Notes : 1. To.