optical thin 0.4mm sapphire glass

Product Overview

Description

Property	Specification
Thickness	0.5-50mm
Size tolerance	+0.0/-0.25
Edge Finish	Ground and beveled
Surface Quality	40-20 scratch-dig
Surface Flatness	λ/4 @ 633 nm
Parallelism	≤3 arc min (≤0.9 mrad)
Clear Aperture	>80% of central diameter
Hardness (Knoop)	1370 kg mm-2
Young's modulus	3.4 x 1011 N m-2
Thermal Limit	22 W m-1 K-1
Thermal expansion coefficient	8.4 x 10-6 K-1