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

Surface Flatness:

λ/20

Back Surface:

Commercial Polish

Surface Quality:

60-40

Diameter (mm):

101.60 +0.0/-1.02

Diameter Tolerance (inches):

+0.0/-0.04

Substrate:

Fused Silica

Coating Specification:

R_avg >85% @ 400 - 700nm
R_avg >90% @ 400 - 2000nm

Coating:

Protected Aluminum (400-2000nm)

Coating Type:

Metal

Clear Aperture CA (mm):

91.44

Note:

Flatness is specified as Peak to Valley

Thickness (mm):

19.10 ±1.5

Thickness Tolerance (mm):

±1.5

Type:

Flat Mirror

Typical Energy Density Limit:

0.3 J/cm² @ 532nm & 1064nm, 10ns

Wavelength Range (μm):

0.4 - 2

Wavelength Range (nm):

400 - 2000

Regulatory Compliance

RoHS 2015:

Compliant

Reach 209:

Compliant

Product Family Description

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

TECHSPEC® Precision Optical Flats are ideal for a variety of applications including interferometry, imaging systems, laser applications, optical path folding, and autocollimation. These mirrors are available in a variety of coating and substrate options, along with 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 and is the ideal choice for applications where temperature fluctuation is a concern. 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.

Title	Stock Number	Price	Buy
108.0mm Max Optic Dia., Jaw Clamp	#53-038	€549.00 Qty 5+ €494.25 Request a Quote	2-3 days ×
108.0mm Max Optic Dia., Jaw Clamp and 6" Kinematic Mount	#53-040	€825.00 Qty 5+ €783.75 Request a Quote	2-3 days ×
8.0 - 118.0 Optic Height, English Bar-Type Optic Holder	#03-666	€95.25 Qty 10+ €85.75 Request a Quote	In Stock ×
19.5 - 108.0mm Optic Dia., Three-Screw Adjustable Ring Mount	#03-670	€86.75 Qty 10+ €78.25 Request a Quote	2-3 days ×
100.0/101.6mm Optic Dia., E-Series Kinematic Mount	#15-869 New ×	€229.00 Qty 10+ €217.50 Request a Quote	2-3 days ×

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

Regulatory Compliance

Product Family Description

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