Substrate: Fused Silica or ZERODUR®
Surface Quality: 60-40
Surface Flatness: l/20, l/10
Coating: See page 88 for curves
43-420 - 000
Precision Optical Flat Mirrors
ZERODUR® Flat Mirrors
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How to Order an Optical Flat Mirror
50.8mm Diameter l/20
ZERODUR® Flat, Uncoated
50.8mm Diameter l/20
ZERODUR® Flat, Gold Coated
Substrate Code Coating Code
43-420 - 566
TECHSPEC® ZERODUR® Precision Optical Flat Mirrors
Diameter
(mm)
Diameter
Tolerance
(mm)
Thickness
(mm)
Thickness
Tolerance
(mm)
l/20 Mirrors l/10 Mirrors
Substrate
Code
Uncoated
-000 Price
Substrate
Code
Uncoated
-000 Price
12.7 +0.0/-0.5 3.2 ±0.8 #43-404 £102.00 #43-327 £69.70
25.4 +0.0/-1.0 12.7 ±1.5 #43-412 £144.50 #32-195 £106.25
50.8 +0.0/-1.0 12.7 ±1.5 #43-420 £242.25 #32-199 £174.25
76.2 +0.0/-1.0 19.1 ±1.5 #48-117 £446.25 #31-391 £331.50
101.6 +0.0/-1.0 19.1 ±1.5 #48-118 £684.25 #31-392 £612.00
152.4 +0.0/-1.0 25.4 ±2.0 #48-119 £2,150.50 #31-393 £1,423.75
203.2 +0.0/-1.0 38.1 ±2.5 #49-049 £3,506.25 #31-394 £2,911.25
TECHSPEC® Fused Silica Precision Optical Flat Mirrors
Diameter
(mm)
Diameter
Tolerance
(mm)
Thickness
(mm)
Thickness
Tolerance
(mm)
l/20 Mirrors l/10 Mirrors
Substrate
Code
Uncoated
-000 Price
Substrate
Code
Uncoated
-000 Price
12.7 +0.0/-0.5 3.2 ±0.8 #43-400 £86.70 #43-319 £61.20
25.4 +0.0/-1.0 12.7 ±1.5 #43-408 £136.00 #01-913 £90.95
50.8 +0.0/-1.0 12.7 ±1.5 #43-416 £204.00 #01-914 £153.00
76.2 +0.0/-1.0 19.1 ±1.5 #47-573 £369.75 #01-915 £293.25
101.6 +0.0/-1.0 19.1 ±1.5 #47-574 £633.25 #01-611 £582.25
152.4 +0.0/-1.0 25.4 ±2.0 #47-575 £1,870.00 #01-612 £1,300.50
203.2 +0.0/-1.0 38.1 ±2.5 #49-048 £3,336.25 #31-390 £2,694.50
254.0 +0.0/-1.0 38.1 ±2.5 #65-879 £6,094.50 #46-715 £4,080.00
304.8 +0.0/-1.0 38.1 ±2.5 #65-880 £8,219.50 #69-921 £5,291.25
Diameter
(mm)
Protected
Aluminum
-522
Enhanced
Aluminum
-533
Protected
Gold
-566
Protected
Silver
-577
12.7 £8.50 £12.75 £25.50 £21.25
25.4 £12.75 £17.00 £25.50 £21.25
50.8 £21.25 £42.50 £93.50 £85.00
76.2 £34.00 £85.00 £110.50 £102.00
101.6 £63.75 £106.25 £140.25 £127.50
152.4 £85.00 £148.75 £233.75 £212.50
203.2 £170.00 £191.25 £297.50 £276.25
254.0 £255.00 £297.50 £404.75 £382.50
304.8 £340.00 £382.50 £488.75 £467.50
• Fused Silica and Zerodur® Substrates
• λ/10 and λ/20 Accuracies
• Variety of Coating Options
TECHSPEC® Precision Optical Flat Mirrors are an excellent choice for interferometry, imaging systems, laser
applications, optical path folding, and autocollimation. All mirrors are available coated or uncoated, and the
second surface is pitch polished to window quality.
These optical flat mirrors are offered with two substrate options: ZERODUR® and fused silica. ZERODUR®
is a yellow tinted glass ceramic developed by Schott®. ZERODUR® features an extremely low coefficient of
thermal expansion of ±0.10 x 10-6/°C. In applications where temperature fluctuation is a concern, ZERODUR®
offers a thermal stability that is unmatched. Fused silica is optically clear and features excellent resistance to
abrasion and high durability, with a low coefficient of thermal expansion of ±0.55 x 10-6/°C. For harsh environments,
or in applications where wear and tear is a factor, fused silica is an ideal choice.
• Precision ZERODUR® Substrates
• λ/10 Flatness
• Low Coefficient of Thermal Expansion
TECHSPEC® ZERODUR® λ/10 First Surface Mirrors are well suited for applications where temperature
fluctuation is a concern. The ZERODUR® substrates have a coefficient of thermal expansion (CTE) of ±0.10
x 10-⁶/°C, which is an order of magnitude lower than most glass types. The low CTE allows these mirrors
to have a consistent reflected wavefront, even when exposed to environments with varying temperature or
illumination sources with changing intensity. TECHSPEC® ZERODUR® λ/10 First Surface Mirrors feature
precision polished substrates with λ/10 flatness and 20-10 surface quality. Multiple metallic and enhanced
metallic coating options are available, allowing for these mirrors to be easily integrated into applications in
both the visible and infrared spectrum.
See page 232 for large kinematic
optical mounts
Substrate: ZERODUR®
Dimensional Tolerance (mm): +0.00/-0.20
Thickness Tolerance (mm): ±0.20
Surface Flatness: λ/10
Surface Quality: 20-10
Clear Aperture (%): 90
Parallelism (arcsec): 30
Back Surface: Commercial Polish
Edges: Ground, protective bevel as needed
TECHSPEC® ZERODUR® λ/10 First Surface Mirrors
Dimensions
Thickness
(mm)
(mm)
Stock No.
Enhanced
Aluminum
Price –
Enhanced Aluminum Stock No.
Protected
Gold
Price –
Protected Gold Stock No.
Protected
SIlver
Price –
Protected Silver
1-5 6-25 26+ 1-5 6-25 26+ 1-5 6-25 26+
10 Dia. 2.0 #39-846 £61.20 £48.88
Call For OEM Quantity Pricing
#39-860 £78.20 £62.48
Call For OEM Quantity Pricing
#39-874 £73.10 £58.23
Call For OEM Quantity Pricing
10 x 10 2.0 #39-847 £61.20 £48.88 #39-861 £78.20 £62.48 #39-875 £73.10 £58.23
15 Dia. 3.0 #39-848 £65.45 £52.27 #39-862 £85.00 £67.58 #39-876 £78.20 £62.48
15 x 15 3.0 #39-849 £65.45 £52.27 #39-863 £85.00 £67.58 #39-877 £78.20 £62.48
20 Dia. 3.0 #39-850 £72.25 £57.38 #39-864 £95.20 £76.08 #39-883 £86.70 £69.27
20 x 20 3.0 #39-851 £72.25 £57.38 #39-865 £95.20 £76.08 #39-909 £86.70 £69.27
25 Dia. 4.0 #39-852 £78.20 £62.48 #39-866 £101.15 £80.33 #39-910 £93.50 £74.38
25 x 25 4.0 #39-853 £78.20 £62.48 #39-867 £101.15 £80.33 #39-911 £93.50 £74.38
50 Dia. 5.0 #39-854 £130.90 £104.55 #39-868 £169.15 £135.15 #39-916 £156.40 £124.95
50 x 50 5.0 #39-855 £130.90 £104.55 #39-870 £169.15 £135.15 #39-917 £156.40 £124.95
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