|
Other coatings available include:
Partial reflective, beamsplitter, and high reflective.
Single Layer MgF2 Antireflective
Coatings (Part No.: SAR)
| Magnesium fluoride is probably the most widely
used thin film material for optical coatings. Its performance
is not outstanding but represents a significant improvement
over an uncoated surface. Because its index is too high to
provide a good impedance match at the air-glass interface.
|
| 
R<1.5%@540nm
R<2%@400-700nm |
R< 2.0%@540nm
R<3.0%@400-700nm |
Multilayer Antireflective
Coatings (Part No.: VAR)
| Such 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. CASTECH 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 paid attention to. |
|
|
R<0.5%@1064nm
|
Multilayer Broadband Antireflective
Coatings (Part No.: WAR)
| Different from single
layer MgF2 broadband antireflective coating, the multilayer
Broadband antireflective coating can reaches higher transmission
for broadband spectrum. Therefore, it is the ideal for a wide
range of multi-wavelength laser and white light application.
Please notify that the wavelength range and reflectivity of
the coating are obviously changed according to the incident
angle. |
R<0.6%@450~650nm
R<1.0%@420~700nm
|
R<1.0%@450~650nm
|
Dual Wavelength Band Antireflective
Coatings (Part No.: DAR)
| This coating allows
two center wavelengths radiation pass through the substrate
with high transmission. This coating is often used in frequency
doubling systems or the other multi-laser output systems,
as the Nd: YVO4 laser (1064nm) and its second harmonic generation
(532nm) green laser. |
R<0.25%@1064nm
R<0.5%@532nm
|
R<0.5%@1064nm
R<0.8%@532nm
|
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