Name: Silicon Optics
Brand: ECOPTIK(CHINA)LTD

Silicon Optics

Monocrystalline silicon is an infrared optical material with excellent comprehensive cost performance. Optical grade Czochralski silicon (OCZ-Si) as a transmission grade material is widely used in the mid-infrared (3-5um) band, and the infrared transmittance exceeds 50%. Zone-melted monocrystalline silicon can be used in a wider band (1-14um), and high-purity zone-melted monocrystalline silicon (HPFZ-Si) can even be used in the far-infrared band (greater than 30um). The choice of silicon type depends on the wavelength range, component thickness and specific application.

Uses Silicon Optics 

Descriptions of Silicon Optics

Single crystal silicon is a chemically inert material with high hardness and insoluble in water. It has good light transmission performance in the 1.2-7μm band, and it also has good light transmission in the far infrared band 300-300μm. Performance, which is a feature that other optical and infrared materials do not have. Silicon (Si) single crystals are usually used in the substrate of 3-5μm mid-wave infrared optical windows and optical filters. Because of the material's good thermal conductivity and low density, It is also a common material for making laser mirrors. The density of monocrystalline silicon is 2.316g/cm³, and the Knoop hardness is 1150, which is harder and less fragile than germanium.

Specifications of Silicon Optics

Crystallographic	Growth Method	CZ OR FZ
Crystallographic	Purity	>99.9999%
Optical	Refractive Index at n3.0	3.436
	Refractive Index at n5.0	3.426
	Thermal Coefficient of Refractive Index at 25 ℃	1.50 x 10-4
	Transmission Range, microns	1.2 - 10, 50 - 100
	Thermal Linear Expansion, ℃-1 for 25 ℃	2.55 x 10-6
Thermal	Thermal Conductivity, W/(m * ℃) at 27 ℃	159
	Specific Heat Capacity, J/(kg * ℃)	0.712 x 103
	Melting Point, ℃	1412
Mechanical	Density, g/cm3 at 20 ℃	2.33
	Mohs Hardness	7
	Young Modulus (E), Pa	1.89 x 1010
	Shear Modulus (G), Pa	7.99 x 1010
	Poisson Ratio	0.266
Chemical	Molecular Weight	28.09
Chemical	Molecular Weight	insoluble

Ref. Index vs. Wavelength λ

Wavelength, Microns	Refractive Index
1.5	3.484
2	3.456
3	3.436
4	3.429
5	3.426
6	3.424
7	3.423
8	3.422
9	3.422

Specifications of Silicon Optics

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Silicon Optics

Descriptions of Silicon Optics

Specifications of Silicon Optics

Ref. Index vs. Wavelength λ

Infrared Optics Products