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

Surface Flatness:

λ/20

Substrate:

Fused Silica

Back Surface:

Commercial Polish

Surface Quality:

60-40

Diameter (mm):

101.60

Diameter Tolerance (inches):

+0.0/-0.04

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

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.