Precision Flat Mirrors

Precision Plane Mirror
  • Material: UV fused silica, BK7
  • Clear Aperture: larger than central 85% of diameter 
  • 1st Surface: λ/10 @633nm over clear aperture, 10-5 Scratch-Dig
  • 2nd Surface: Commercial polish
  • Diameter tolerance: +0.000/-0.010" (+0.00/-0.25mm)
  • Thickness tolerance: ±0.010" (±0.25mm) 
  • Wedge: ≤5 arc min
  • Bevel: <0.5mm @45° typical

  Spectral Optics provides precision flat mirrors are designed to be used as dielectric laser mirrors or metal coated mirrors. These are an excellent choice for optical path folding applications, various imaging systems, and laser applications.

Product Lists

Windows Part Number Price (USD)
Diameter (D) Thickness (T) Material
0.5" (12.7mm) 1/4" (6.35mm) Fused silica PM0525-FS $45
BK7 PM0525-BK $37
0.75" (19.1mm) 1/4" (6.35mm) Fused silica PM0725-FS $55
BK7 PM0725-BK $41
1.0" (25.4mm) 1/4" (6.35mm)
or 3/8" (9.53mm)
Fused silica PM1025-FS
BK7 PM1025-BK
1.5" (38.1mm) 1/4" (6.35mm)
or 3/8" (9.53mm)
Fused silica PM1525-FS
BK7 PM1525-BK
2.0" (50.8mm) 1/4" (6.35mm)
or 3/8" (9.53mm)
Fused silica PM2025-FS
BK7 PM2025-BK
3.0" (76.2mm) 1/2" (12.7mm) Fused silica PM3050-FS $280
BK7 PM3050-BK $220
4.0" (101.6mm) 1/2" (12.7) Fused silica PM4050-FS $395
BK7 PM4050-BK $340
  1. Usually 0.5-2.0" diameter substrates are in stock. Please check up the delivery for the larger substrates with us. It usually takes ~3-5 weeks if we don't have any in stock.
  2. Some other sizes and/or thicknesses may be available. Please contact us for other custom size windows.
  3. Please refer to the coating service section for the detailed coating specs available.
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