Compare Model Drawings, CAD & Specs Diameter Thickness Surface Flatness Surface Quality Parallelism Availability Price
$206
12.7 mm 2.0 mm λ/4 @ 633 nm 40-20 scratch-dig ≤3 arc min
$247
25.4 mm 2.0 mm λ/4 @ 633 nm 40-20 scratch-dig ≤3 arc min
$742
50.8 mm 2.0 mm λ/4 @ 633 nm 40-20 scratch-dig ≤3 arc min
$64
5.0 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$64
6.35 mm 0.5 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$64
9.50 mm 0.5 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$76
10.0 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$76
12.7 mm 3.2 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$76
13.0 mm 0.5 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$81
15.0 mm 2.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$81
17.25 mm 2.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$81
22.0 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$87
23.75 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$96
25.0 mm 2.3 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$96
25.4 mm 2.3 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$127
30.0 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$127
31.8 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$191
35.0 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$212
38.1 mm 1.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$262
40.0 mm 2.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$403
50.8 mm 3.15 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min
$807
75.0 mm 2.0 mm 2λ @ 633 nm 80-50 scratch-dig ≤3.5 arc min

Specifications

  • Material
    Sapphire
  • Antireflection Coating
    Uncoated
  • Cleaning
  • Clear Aperture
    SW8: central 80% of diameter
    SAW: central 90% of diameter
  • Birefringence
    SAW: 0.008 for visible light orthogonal to optical axis
  • Edge Finish
    Ground and beveled
  • Thermal Expansion Coefficient
    8.4 x 10-6 K-1
  • Thermal Limit
    22 W m-1 K-1
  • Wavelength Range
    150 to 5000 nm

Features

Handles High Temperatures and Pressures

Sapphire windows are highly tolerant of extreme temperature and pressure differences. These windows are commonly used as viewports enable viewing inside of vacuum chambers, or chambers containing high temperature plasma.

Wide Transmittance Range

Uncoated Sapphire is transparent across a wide wavelength range from 170 nm to 5.5 µm.

Unique Sapphire Material Properties

Sapphire is a single crystal form of Al2O3, with a favorable combination of chemical, mechanical and optical properties. Sapphire is resistant to attack by strong acids, enabling use in a corrosive atmosphere. It is resistant to scratch and abrasion with very high Knoop hardness of 1800 parallel to the optic axis (C-axis), 2200 perpendicular to the optic axis.

Note on Birefringence

The SAW series sapphire windows are provided with a random axis orientation. As sapphire is slightly birefringent, this may result in slight alteration of the polarization state of transmitted light.