Multilayer Anti-Reflective Coatings(Part No: VAR)

Download PDF document

Multilayer antireflective coatings can reaches the lowest reflectivity at a center wavelength. It is often applied to single laser wavelength or multiple,closely-spaced wavelength system to guarantee the lowest loss for center wavelength. Ultiquest Tech can provide such coating with center wavelength from 250nm to 2200nm. When selecting a suitable multilayer antireflective coating,the center wavelength and damage threshold must be considered.

For your application,please refer to its following characteristics:

Multi-layer AR can reduce the remaining reflectance to less than half of a single layer AR.
Essentially the effective wavelength range is narrow, but it could be broaden by choosing appropriate deposition material, number of layers and their thickness.

Reflectance Simulation of Single Layer Anti-reflection Coatings
Designed condition: 1) Substrate: BK7 Glass __________________2) Center wavelength: 532nm _________________ 3) Illuminant: White	Designed condition: 1) Substrate: ZnSe __________________2) Center wavelength: 10.6um _________________ 3) Illuminant: White

Multilayer Anti-reflection Coating Normal Incidence Wavelength Range (nm) Maximum Reflectance (%) Damage Threshold Coating Index 400 0.5 2 J/cm2 in 10 ns UQT-VAR001 488 0.5 2 J/cm2 in 10 ns UQT-VAR002 532 0.3 3 J/cm2 in 10 ns UQT-VAR003 633 0.3 3 J/cm2 in 10 ns UQT-VAR004 780 0.3 4 J/cm2 in 10 ns UQT-VAR005 800 0.3 4 J/cm2 in 10 ns UQT-VAR006 850 0.3 4 J/cm2 in 10 ns UQT-VAR007 1064 0.3 4 J/cm2 in 10 ns UQT-VAR008 1320 0.3 4 J/cm2 in 10 ns UQT-VAR009 1547 0.6 3 J/cm2 in 10 ns UQT-VAR010
Please Contact ultiQuest for more information and technical supports.
NOTES!
	The values of laser damage threshold are based on actual measurement and not a guaranteed specification.