| Metal
Coated Mirror |
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After
aluminium (Al), silver (Ag) or Gold (Au) coating, the mirror
show high relfection perfance for very wide broadband. Generally,
we over coat the protective SiO2 or MgF2 layer outside the
metal layer to avoid the damage from the environment.
Metal coating is less sensitive to variations in incident
angle, polarization, and wavelength than dielectric coatings |
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Coating
Type
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Description
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UV
enhanced
Al+MgF2 coating
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Al coating
has higher reflection than Ag or Au coating at UV
to visible range. By special design, Simphoton can
coat the UV enhanced Al+MgF2 with Ravg>85%@250nm~700nm. |
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Protective
Al+SiO2 coating
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Ravg>90%@400nm~10.0um |
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Protective
Ag+SiO2 coating
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Ravg>95%@600nm~10.0um |
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Bare
gold coating
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Ravg>96%@700nm~20um |
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Protective
gold coating
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Ravg>95%@700nm~1700nm
& Ravg>98%@2um~16um |
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Spefications:
Substrate
Material: BK7, Fused silica, or other optical material
Plano or Plano-concave substrate are availble
Typical dimension: dia.25.4 (+0/-0.2) mm x thickness 3.0
(+/-0.2)mm
Surface figure: L/4@632.8nm
Surface quality: 60-40 after coating
Protective chamfer
Back side unpolished or black painted upon request
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