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Optical Crystals

CRYLIGHT 社製 Optical Crystals

各モデルの抜粋仕様を下記から確認いただけます。

Sapphire CrystalYAG Crystal

Sapphire Crystal

Features
 

Large size Sapphire crystals up to 3′ in boule are available from CryLight. As the hardest of oxide crystals, sapphire has a combination of optical and physical properties that make it the best choice for a variety of demanding applications. Sapphire maintains its strength even at high temperatures. It has good thermal properties, excellent electrical and dielectric properties and is resistant to chemical attack. These properties encourage the use of sapphire in aggressive environments where reliability, optical transmission and strength are required.

 

 
Specifications
 
Specifications:

Orientation: <001> or <111> +/- 5deg
Diameter Tolerance : +0.0 /-0.1mm
Thickness Tolerance: +/-0.2mm
Surface Quality: better than 80/50 scratch/dig
Parallelism: < 30 arcsec
Flatness: < λ per 25mm @632.8nm
Perpendicularity: < 5 arcmin
Wavefront Distortion: < λ/2 @632.8nm
Coating: Coating upon Request

Properties:

Crystal Structure Hexagonal System
Lattice a=4.785 Å, c=12.991 Å
Density 3.98 g/cm3
Transmission Range 0.15 – 5.5 mm
Melting Point 2040 °C
Specific Heat 0.418 W·s /g /K
Thermal Conductivity 25.12 W/m /K
Thermal Shock Resistance 790 W /m
Thermal Expansion 5.8×10-6 /K
dn/dT, @ 633nm 13×10-6 /K-1
Mohs Hardness 9
Refractive Index 1.83 (0.26mm), 1.76 (0.63mm), 1.58 (5.57mm)

YAG Crystal

 

Features

 

Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density applications. The mechanical and chemical stability is comparable to sapphire crystal, but YAG is unique with non-birefringence and available with higher optical homogeneity and surface quality. Up to 3 YAG boule grown by CZ method, as-cut blocks, windows and mirrors are available from CryLight.

 

Specifications

Specifications:

Orientation: < 111 > +/-5deg
Diameter Tolerance : +0.0 /-0.1mm
Thickness Tolerance: +/-0.2mm
Surface Quality: better than 10/5 scratch/dig
Parallelism: < 30 arcsec
Flatness: < λ/8 @632.8nm
Perpendicularity: < 5 arcmin
Wavefront Distortion: < λ/2 @632.8nm
Coating: Coating upon Request
Properties:

Crystal Structure Cubic
Density 4.5 g/cm3
Transmission Range 250 – 5000 nm
Melting Point 1970 °C
Specific Heat 0.59 W·s /g /K
Thermal Conductivity 14 W/m /K
Thermal Shock Resistance 790 W /m
Thermal Expansion 6.9×10-6 /K
dn/dT, @ 633nm 7.3×10-6 /K-1
Mohs Hardness ~ 8.5
Refractive Index 1.8245 @ 0.8mm, 1.8197 @ 1.0mm,
1.8121 @ 1.4mm

 

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