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SINGLE SIDED OPTICAL FLATS
Single sided optical flats are used as a reference (test plate) against which the flatness of an unknown surface can be compared. Advanced Optics offers single sided optical flats made of low expansion borosilicate glass, fused silica, fused quartz and ZERODUR® up to 8 inches in diameter. Surface flatness of λ/4, λ/10 and λ/20 are available in fused silica, fused quartz or ZERODUR© and λ/4 and λ/10 in low expansion borosilicate glass.
Optical Flat Specifications:
Many of our 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 can be used as an optical window. In addition to our in-stock optical flats, we offer custom fabricated optical flats to meet exact customer requirements.
The accuracy of each optical flat is traceable to the National Institute of Standards and Technology.
View our in-stock single sided optical flats below:
Surface Accuracy: Single Side | Diameter | Fused Silica (Thickness) |
λ/20 (0.000001") | 25.4 (1") | 12.7 (1/2") |
λ/10 (0.000002") | 25.4 (1") | 12.7 (1/2") |
λ/20 (0.000001") | 50.8 (2") | 15.9 (5/8") |
λ/10 (0.000002") | 50.8 (2") | 15.9 (5/8") |
λ/20 (0.000001") | 76.2 (3") | 15.9 (5/8") |
λ/10 (0.000002") | 76.2 (3") | 15.9 (5/8") |
λ/20 (0.000001") | 101.6 (4") | 19.1 (3/4") |
λ/10 (0.000002") | 101.6 (4") | 19.1 (3/4") |
λ/20 (0.000001") | 127 (5") | 19.1 (3/4") |
λ/10 (0.000002") | 127 (5") | 19.1 (3/4") |
λ/20 (0.000001") | 152.4 (6") | 25.4 (1") |
λ/10 (0.000002") | 152.4 (6") | 25.4 (1") |
λ/20 (0.000001") | 203.2 (8") | 33.8 (1.33") |
λ/10 (0.000002") | 203.2 (8") | 33.8 (1.33") |
Fused Silica Technical Data Sheet from Corning Incorporated (pdf)
Advanced Optics offers optical flat resurfacing for single sided optical flats. Optical flats and optical windows become worn and abraded in use and accuracy is lost. This degradation in performance is due to a decrease in the distinctness of the interference pattern, and to a change in figure caused by scratches. Repolishing the surface of the optical flat back to its original accuracy can be less costly than replacement. Advanced Optics maintains an optical flat refinishing service with fast turnaround time.
(top view of optical flat)

(top view of optical flat)

Have a question? Give us call and tell us about your project. (262) 548-1155
- Optical Mirrors
- AlSiO Economy Optical Mirror
- Bare Al Optical Mirror
- Borosilicate Optical Mirror
- Custom Optical Mirror
- First Surface Optical Mirrors
- Fused Silica Optical Mirror
- Precision Optical Mirror
- ZERODUR® Optical Mirror
- Round Optical Mirrors
- Rectangle Optical Mirrors
- Square Optical Mirrors
- λ/4 Optical Mirrors
- Standard 1" x 1", λ/4 Optical Mirror
- λ/10 Optical Mirrors
- λ/20 Optical Mirrors
- Selecting An Optical Mirror
- Optical Mirror 10 Step Design Chart
- Technical Data: Protected Mirrors
- Technical Data: Unprotected Mirrors
- Optical Mirror Cleaning
- Optical Windows
- Custom Optical Window
- Commercial Grade Optical Window
- Precision Optical Window
- Fused Silica Optical Window
- N-BK7 Optical Window
- λ/20 Optical Window
- Optical Window 10 Step Design Chart
- Optical Window Technical Information
- Optical Filters
- Dichroic Optical Filters
- Neutral Density Filters
- Colored Glass Absorptive Filters
- Optical Filters Technical Information
- Optical Lenses
- Optical Lenses Convex/Concave Mirror Theory
- Technical Data for Optical Materials
- Corning Fused Silica Data Sheet PDF
- BORO FLOAT Technical Data Sheet PDF
- N-BK7 Technical Data Sheet PDF
- Soda Lime Glass Technical Data Sheet PDF
- Fused Quartz Data Sheet PDF
- Zerodur Technical Data Sheet PDF
- Clearceram(C) Data Sheet PDF
- ULE® Low Expansion Glass Data Sheet PDF
- Viosil Data Sheet PDF
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P.O. Box 117, Pewaukee, WI 53072-0117, USA
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(262) 548-1155
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