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Single Layer MgF2 Antireflective Coating（SAR）MgF2 is the most widely used thin film material for optical coatings. Though its performance is not outstanding but it represent a significant improvement over an uncoated surface in visible light area.
VAR coatings have the lowest reflectivity in a narrow wavelength band; minimum reflection can be less than 0.1%. VAR are used to target a single wavelength, such as 632.8nm or 532nm, or a single very narrow band of wavelengths, such as laser and communication to decrease optical loss.
| Part NO | SAR | VAR |
| Illuminant | White | White |
| Angle | 0.0(deg) | 0.0(deg) |
| Performance | R<0.2%@550nm | R<0.2%@532nm |
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