Technical Note:
Broadband Multilayer Antireflection Coatings

Broadband Multilayer Antireflection Coatings markedly improve the transmission efficiency of any lens, prism, beam-splitter, or window. By reducing surface reflections over a wide wavelength range, broadband antireflection coatings improve transmission and enhance contrast. Newport has designed a series of durable multilayer coatings for nearly every application in the 245–1550 nm range. Coatings perform effectively for multiple wavelengths and tunable lasers, thereby eliminating the need for several sets of optics. Most Newport lenses are available from stock with AR.10, AR.14, AR.16, and AR.18 antireflection coatings.

Specifications

Substrate Material For N-BK7 and fused silica (AR.10 for fused silica only)
Durability MIL-C-675C, moderate abrasion
Cleaning Non-abrasive method, acetone or ispropyl alcohol on lens tissue recommended
Damage Threshold AR.10, 500 W/cm2,1 J/cm2 with 10 nsec pulses @ 325 nm, typicalAR.14, 1000 W/cm2, 2 J/cm2 with 10 nsec pulses @ 532 nm, typicalAR.16, 1000 W/cm2, 2 J/cm2 with 10 nsec pulses @ 1064 nm, typicalAR.18, 1000 W/cm2, 2 J/cm2 with 10 nsec pulses @ 1064 nm, typical
Wavelength Range
(nm)
Center Wavelength
(nm)
Reflectivity per Surface Angle of Incidence Coating Code
245–440 320 Ravg <0.5%, Rmax<1.0% 0–15° AR.10
430–700 530 Ravg <0.5%, Rmax<1.5% 0–15° AR.14
650–1000 790 Ravg <0.5%, Rmax <1.5 0–15° AR.16
1000–1550 1210 Ravg <0.5%, Rmax <1.5% 0–15° AR.18