sapphire plane plate

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Sapphire Optics

Type:
Windows, Lens, Prisms, Tubes etc

Flatness:
λ/8@633nm

Bevel:
<0.2mmx45°

Surface quality:
80/50~20/10

Parallelism:
≤3′

Sapphire provides exceptional surface hardness and a transmission range extending from the UV to the MIR. It can only be scratched by a few materials other than itself. The uncoated substrate is chemically inert and insoluble to water, common acids, or alkalis at temperatures up to ~1,000 °C.

wdt_ID Attribute Value
1 Type Windows, Lens, Prisms, Tubes etc
2 Surface quality 80/50~20/10
3 Flatness λ/8@633nm
5 Parallelism ≤3′
6 Bevel <0.2mmx45°

wdt_ID Attributes Value
1 Transmission Range: 0.17 to 5.5 μm
15 Refractive Index: No 1.75449; Ne 1.74663 at 1.06 μm (1)
16 Reflection Loss: 14% at 1.06 μm
17 Absorption Coefficient: 0.3 x 10⁻³ cm⁻¹ at 2.4 μm (2)
18 Reststrahlen Peak: 13.5 μm
19 dn/dT: 13.1 x 10⁻⁶ at 0.546 μm (3)
20 dn/dμ = 0: 1.5 μm
21 Density: 3.97 g/cc
22 Melting Point: 2040°C
23 Thermal Conductivity: 27.21 W m⁻¹ K⁻¹ at 300K
24 Thermal Expansion: 5.6 (para) & 5.0 (perp) x 10⁻⁶/K *
25 Hardness: Knoop 2000 with 2000g indenter
26 Specific Heat Capacity: 763 J Kg-1 K-1 at 293K (4)
27 Dielectric Constant: 11.5 (para) 9.4 (perp) at 1MHz
28 Youngs Modulus (E): 335 GPa
29 Shear Modulus (G): 148.1 GPa
30 Bulk Modulus (K): 240 GPa
31 Elastic Coefficients: C11=496 C12=164 C13=115 C33=498 C44=148
32 Apparent Elastic Limit: 300 MPa (45,000 psi)
33 Poisson Ratio: 0.25
34 Solubility: 98 x 10⁻⁶g/100g water
35 Molecular Weight: 101.96
36 Class/Structure: Trigonal (hex), R3c

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