Optical Flat - Single and Double Sided Flats

  • Optical flats precision polished up to 8" in diameter
  • Accuracy of 1/4, 1/10 or 1/20 wave available, many in stock for immediate shipment
  • Each optical flat comes with a Certificate of Calibration traceable to the NIST
  • Available with either anti-reflective or AlSiO coatings: 1/10 wave mirrors and 1/20 wave mirrors
  • Custom sizes, coatings, drilling and beveling available upon request with free engineering service.
  • Our optical flats are excellent for use as a reference (test plate) against which the flatness of an unknown surface may be compared or as optical windows.

Optical Flat Specification

Single Sided Optical Flat and Double Sided Optical FlatMany of Advanced Optics optical flats are manufactured out of synthetic fused silica which provides superior transmission characteristics, a high degree of purity, exceptional environmental durability, and a low coefficient of thermal expansion. Due to these attributes, our double sided optical flats may be used as optical windows. Optical flats also available in low expansion borosilicate glass and Zerodur. See our available selection of fused silica flats below.

Please call 262-548-1155 or email sales@advancedoptics.com for technical assistance and competitive pricing.


Surface Accuracy: Single or Double Sided Flat Diameter Fused Silica (Thickness)
1/20 wave (0.000001") 25.4 (1") 12.7 (1/2")
1/10 wave (0.000002") 25.4 (1") 12.7 (1/2")
1/20 wave (0.000001") 50.8 (2") 15.9 (5/8")
1/10 wave (0.000002") 50.8 (2") 15.9 (5/8")
1/20 wave (0.000001") 76.2 (3") 15.9 (5/8")
1/10 wave (0.000002") 76.2 (3") 15.9 (5/8")
1/20 wave (0.000001") 101.6 (4") 19.1 (3/4")
1/10 wave (0.000002") 101.6 (4") 19.1 (3/4")
1/20 wave (0.000001") 127 (5") 19.1 (3/4")
1/10 wave (0.000002") 127 (5") 19.1 (3/4")
1/20 wave (0.000001") 152.4 (6") 25.4 (1")
1/10 wave (0.000002") 152.4 (6") 25.4 (1")
1/20 wave (0.000001") 203.2 (8") 33.8 (1.33")
1/10 wave (0.000002") 203.2 (8") 33.8 (1.33")

The accuracy of each optical flat is traceable to the National Institute of Standards and Technology.


Corning Incorporated Data SheetFused Silica Technical Data Sheet from Corning Incorporated (pdf)

Double Surface Optical Flat/Optical Windows

Advanced Optics also offers double-surface optical flats for use as optical windows. As with our flats, our optical windows are made of synthetic fused silica which provides superior transmission characteristics, a high degree of purity, exceptional environmental durability, and a low coefficient of thermal expansion. Both are provided either uncoated or with an anti-reflective coating. Dual-surface optical flats are an excellent choice when an optical system requires separation between two environments while passing a specific wavelength(s) of light or for demanding interferometry requirements.

 


Flatness Error of One Fringe

(1/2 wave)
(top view of optical flat)

Test Piece

Perfectly Flat
(top view of optical flat)
top view of optical flat top view of optical flat

Contact Advanced OpticsContact us at (262) 548-1155 or email. Our engineers are waiting to serve you.