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ROUND OPTICAL MIRRORS
Round optical mirrors are available in three different materials to meet various demanding applications where a high degree of wavefront integrity is critical. Our round optical mirrors are aluminum coated with a protective SiO overcoat. They are also available uncoated for use as windows or flats.
Target Grade - made of low expansion borosilicate glass which provides low thermal expansion, high thermal resistance, excellent light transmission and impressive chemical durability.
Interferometer Grade - 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.
ZERODUR® - made of a glass-ceramic material which is thermally more stable than fused silica.

Target Grade Specifications:
- S1: Flatness specified at 633nm
- 60/40 scratch/dig, except where noted
- S2: Fine ground
- Diameter: +/-1.0mm
- Thickness: +/-1.0mm
- Material: Low expansion borosilicate glass
- * Standard 80/50 scratch/dig
Diameter | Thickness | Flatness | Flatness |
25.4mm | 6.35mm | λ/4 | λ/10 |
50.8mm | 9.5mm | λ/4 | λ/10 |
76.2mm | 12.7mm | λ/4 | λ/10 |
101.6mm | 15.9mm | λ/4 | λ/10 |
*152.4mm | 25.4mm | λ/4 | λ/10 |
*203.0mm | 33.8mm | λ/4 | λ/10 |
Interferometer Grade Specifications:
- S1: Flatness specified at 633nm
- 60/40 scratch/dig
- S2: Fine ground
- Diameter: +/-0.5mm
- Thickness: +/-0.5mm
- Material: Fused silica
ZERODUR®
Please call for a prompt quote on your specifications.
Diameter | Thickness | Flatness | Flatness |
25.4mm | 12.7mm | λ/10 | λ/20 |
50.8mm | 15.9mm | λ/10 | λ/20 |
76.2mm | 15.9mm | λ/10 | λ/20 |
101.6mm | 19.1mm | λ/10 | λ/20 |
127.0mm | 19.1mm | λ/10 | λ/20 |
152.4mm | 25.4mm | λ/10 | λ/20 |
In addition to our in-stock mirrors, Advanced Optics provides custom fabrication and free engineering services. We have the capability to provide custom shapes, apply bevels and even drill holes to meet your unique application. Need a custom coating? No problem.
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
- UV and IR Optical Windows
- 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
Fax (262) 548-1153