Elliptical Mirrors

Circular Aperture at 45°

1/2", 1", or 2" Effective Diameter

Metallic or Broadband Dielectric Coating

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Available uncoated

Available with -E02 or -E03 Dielectric Coating

E02 broadband dielectric coated mirrors offer high reflectance in the visible range (400 - 750 nm)，E03 broadband dielectric coated mirrors offer high reflectance in the NIR range (750 - 1100 nm).Although broadband dielectric coatings offer smaller operating wavelength ranges than metallic coatings, they typically yield higher reflectance in those ranges than their metallic counterparts.

Available with Protected Aluminum, Protected Silver, or Protected Gold Metallic Coating

An SiO2 coating is used to protect the delicate aluminum coating, making it suitable for laboratory and industrial use. The protected aluminum coating has a smaller chance of tarnishing than protected silver in a high humidity environment, and gives a reflectance that most closely matches the reflectance of a bare aluminum coating. These mirrors have an average reflectance greater than 90% from 450 nm to 2 µm and greater than 95% over their 2 - 20 µm spectral range.

Silver-coated mirrors have the highest reflectance of all metal-coated mirrors in the visible wavelength range. Silver offers high reflectance from 450 nm to 20 µm. In order to protect the mirrors from oxidation, they have an overcoat of SiO2. Though the overcoat helps to protect silver from tarnishing, high humidity environments should be avoided.

Protected gold coatings are ideal for use over the entire IR range, with an average reflectance in excess of 96% for 800 nm - 20 µm. A protective SiO2 overcoat is layered over the gold to make it damage resistant and easy to clean.

Seray's elliptical mirrors feature a coated face on an elliptical UV fused silica substrate or an elliptical fused silica substrate. When the mirror is rotated by 45° about the minor axis, the resulting clear aperture is circular