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All Products / Optics / Optical Mirrors / Flat Mirrors / Precision Polished Metal Coatings / Precision Optical Flat Mirrors
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

4" Dia. Protected Aluminum, λ/20 Flat Fused Silica

Optical Flats 1
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Stock #47-574-522 3-5 days
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Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
S$1,435.50
Qty 1-5
S$1,435.50
Qty 6+
S$1,290.50
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Specifications

General

Note:
Flatness is specified as Peak to Valley
Type:
Flat Mirror

Physical & Mechanical Properties

Diameter (mm):
101.60 +0.0/-1.02
Back Surface:
Commercial Polish
Diameter Tolerance (inches):
+0.0/-0.04
Clear Aperture CA (mm):
91.44
Thickness (mm):
19.10 ±1.5
Thickness Tolerance (mm):
±1.5

Optical Properties

Surface Flatness (P-V):
λ/20
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Fused Silica (Corning 7980)
Surface Quality:
60-40
Coating Specification:
Ravg >85% @ 400 - 700nm
Ravg >90% @ 400 - 2000nm
Coating:
Protected Aluminum (400-2000nm)
Coating Type:
Metal
Wavelength Range (μm):
0.4 - 2
Wavelength Range (nm):
400 - 2000
Damage Threshold, Reference: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification.
0.3 J/cm2 @ 532nm & 1064nm, 10ns

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 242:
Compliant
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Product Details

  • Fused Silica and ZERODUR® Substrates
  • λ/10 and λ/20 Surface Flatness
  • Variety of Coating Options Offered

TECHSPEC® Precision Optical Flat Mirrors are ideal for various applications, including interferometry, imaging systems, laser applications, optical path folding, and autocollimation. These mirrors are available in multiple coating and substrate options and surface flatness options of λ/10 and λ/20. The first substrate option ZERODUR®, a yellow-tinted glass ceramic, features an extremely low coefficient of thermal expansion. TECHSPEC® Precision Optical Flat Mirrors are ideal for applications where temperature fluctuation is a concern using the ZERODUR® substrate. The second option, Fused Silica, is optically clear and features excellent resistance to abrasion and high durability, making it the best choice for applications in harsh environments.

TECHSPEC® λ/10 and λ/20 Precision Optical Flats are available for testing and measurement applications.

Note: Surface flatness specifications are measured before coating.

Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include:

  • Custom dimensions, materials, coatings, and more
  • High-precision surface quality and flatness
  • Tight tolerances and complex geometries
  • Scalable production—from prototype to volume

Learn more about our custom manufacturing capabilities or submit an inquiry here.

Compatible Mounts