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Optical Materials

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Features
CryLight is capable of fabricating a wide variety of optical components with various optical materials.The most important material properties to consider for an optical element are transmission versus wavelength,index of refraction,thermal characteristics,mechanical and chemical characteristics and cost.
There are two instances in which you might need to know more about optical materials.First,you may need to determine the per formance of a catalog componentin a particular application. Second,you may need specific inforformation when selecting the material for a custom component.The data in the following is intended to assist in these sutuations.

To select the right materials seems overwhelming.The simplest way is to let a CryLight engineer know your application,and

we can select them for you.
Specifications
BK7 of Optical Materials:
Refractive Index: 1.5168
Abbe Number: 64.17
Density(g/cm3): 2.52
Transmission Range(mm): 0.33 - 2.1
Thermal Expansion Coefficient(10-6/K): 7.5


Fused Silica of Optical Materials:
Refractive Index: 1.433849
Abbe Number: 94.99
Density(g/cm3): 3.18
Transmission Range(mm): 0.17 - 7.8
Thermal Expansion Coefficient(10-6/K): 18.85


CaF2 of Optical Materials:
Refractive Index: 1.433849
Abbe Number: 94.99
Density(g/cm3): 3.18
Transmission Range(mm): 0.17 - 7.8
Thermal Expansion Coefficient(10-6/K): 18.85


Sapphire of Optical Materials:
Refractive Index: 1.768234
Abbe Number: 72.24
Density(g/cm3): 3.99
Transmission Range(mm): 0.18 - 4.5
Thermal Expansion Coefficient(10-6/K): 5.8
 

 
a-BBO (high temperature Barium Borate) is a negative uniaxial crystal with successfully growing into large size under both of Czochralski and Top seeded flux methods. It has a large birefingence, coefficient unique UV transparency, high optical homogeneity, good mechanical properties and high damage threshold. It is excellent material for UV polarizing components.
 

 
YVO4 (yttrium orthovanadate) is a positive uniaxial crystal grown by Czochralski method. It has good mechanical and physical properties and is ideal as optical polarzing components because of its wide transparency range in IR and large birefringence. It is an excellent crystal in many applications including fiber optic isolators, circulators, beam displacers and Glan polarizers.


 
Calcite is a negative uniaxial crystal that has high birefringence, wide spectral transmission and availability in reasonably-sized rhombs. Although it is a soft crystal and is easily scratched, it is an ideal material for use in visiable & IR polarizers, such as Glan Taylor, Glan Thompson and Glan laser.


 
Crystal Quartz is a positive uniaxial birefringent single crystal. CryLight's crystal quartz is selected to minimize inclusions and refractive index variation. Crystal quartz is most commonly used for high damage threshold waveplates.


  YVO4 Calcite α-BBO Quartz
Transparency 400-500nm 350-2300nm 189-3500nm 200-2300nm
Crystal Class(Uniaxial) Positive
no=na=nb,ne=nc
Negative
no=na=nb,ne=nc
Negative
no=na=nb,ne=nc
Positive
no=na=nb,ne=nc
  YVO4 Calcite α-BBO Quartz
Mohs Hadness 5 3 4.5 7
Thermal Expansion
Coefficient
αa=4.43´10-6/K
αa=11.37´10-6/K
αa=24.39´10-6/K
αa=5.68´10-6/K
αa=4´10-6/K
αa=36´10-6/K
αa=4.43´10-6/K
αa=4.43´10-6/K
Hygroscopic Susceptibility Low Low to Moisture Low Low
Refractive Index
(633nm)
no=1.9928
ne=2.2153
no=1.6558
ne=1.4852
no=1.6706
ne=1.5483
no=1.5427
ne=1.5518