Compare Model Drawings, CAD & Specs Availability Price
Concave Super Mirror, High Finesse, Ultra-Low Loss, 25.4 mm, 583-663 nm
In Stock
In Stock
Concave Super Mirror, High Finesse, Ultra-Low Loss, 25.4 mm, 761-867 nm
In Stock
In Stock
Concave Super Mirror, High Finesse, Ultra-Low Loss, 25.4 mm, 996-1134 nm
In Stock
In Stock
Concave Super Mirror, High Finesse, Ultra-Low Loss, 25.4 mm, 1241-1412 nm
In Stock
In Stock
Concave Super Mirror, High Finesse, Ultra-Low Loss, 25.4 mm, 1457-1659 nm
In Stock
In Stock

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  • Mirror Shape
  • Diameter
    25.4 mm
  • Effective Focal Length (EFL)
    500 mm
  • F/#
  • Radius of Curvature (R)
    -1000 mm
  • Material
    UV Grade Fused Silica
  • Coating Type
    High Finesse Broadband
  • Angle of Incidence
  • Reflectivity
    R>99.97% at design wavelength
  • Damage Threshold
    1000 W/cm2 CW, 0.5 J/cm2, 10 nsec pulses
  • Surface Accuracy, Power
    0.5λ @ 632.8 nm
  • Surface Quality
    20-10 scratch-dig (10-5 in the central 50%)
  • Back Surface
    <λ/10 @ 632.8 nm (AR coated)
  • Edge Thickness (Te)
    6.35 mm
  • Thickness Tolerance
    ±0.13 mm
  • Focal Length Tolerance
  • Diameter Tolerance
    +0/-0.1 mm
  • Clear Aperture
    ≥central 80% of diameter
  • Chamfers
    0.25-0.76 mm face width
  • Chamfers Angle Tolerance
    45 ±15°
  • Cleaning


Absolute R>99.97% Mirrors In Stock

Many standard mirrors are offered with high average reflectivity, but these Supermirrors have exceptional absolute reflectivity specifications of greater than 99.97%. We stock theses mirrors making them the highest absolute reflectivity available in a standard catalog optic. These mirrors are ideal when you need every photon. The high finesse coatings have finesse greater than 10,000 and efficiency greater than 10% when used in carefully constructed cavities.

Superpolished Substrates

This mirror is superpolised to <2 Å RMS microroughness for ultra-low scatterring. 10-5 scratch-dig is achieved in the center 50% of the clear aperture. This central area is the sweet spot where Fabry pert cavity designs can achieve extremely high finesse.

Surface profile of typical superpolished substrate.

Advanced Ion Beam Sputtered (ISB) Coatings

Newport's proprietary IBS coating technique enables the SuperMirrors to provide the highest absolute reflectivity available as standard mirrors. IBS is a higher energy coating process in which atoms of the coating material can be packed more tightly. The results are very high reflectivity, resistance to environmental changes, and unmatched performance for intra-cavity mirrors which require high finesse.

Keep Surface Clean for High Performance

Care should be taken to insure that these mirrors remain clean during use to maintain the high reflectivity and performance levels. The only cleaning operation recommended is the removal of dust with a low pressure filtered dry nitrogen nozzle. Cleaning techniques specifically developed for high performance optics may be used by qualified personnel. 100 ppm performance levels cannot be maintained if the optic is cleaned using standard techniques.

UV Fused Silica Substrates

Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a low content of inclusions with high refractive index homogeneity, a very low thermal expansion coefficient, and excellent transmittance in the wavelength regime from UV to NIR. As a result, these mirrors will perform better with temperature fluctuations and is ideal for high-energy laser applications due to its high energy damage threshold. For more information, please see our Optical Materials technical note.