Optical Grade Silicon Windows - Flatness: Lambda/20

Silicon Windows

Silicon (Si) Windows have the advantages of wide transmission band (covering 1.2-7um), low cost and low density, which are very suitable for weight-sensitive applications, especially in the 1.65 - 5μm area.
CRYSMIT offers high precision optical grade Silicon windows with Flatness of Lambda/20 and Surface Quality of 10/5.
Czochralski (Cz) Silicon is commonly used as a substrate material for infrared reflectors and windows in the 1.5 μ m-8 μ m region. It is frequently used for laser mirrors because of its high thermal conductivity and low density. Silicon is also a useful transmitter in 20 μ m range.
CRYSMIT manufactures silicon windows with diameters ranging from 3 mm to 300 mm. We offer options for AR coating or DLC coating to enhance their performance and durability.

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General Product

Specification

FAQS

Flatness Report

Part NO.

Material

Diameter

Thickness

Flatness

Surface Quality

Coated

Delivery

Price

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Part NO.	Material	Diameter	Thickness	Flatness	Surface Quality	Coated	Delivery	Price	Add to CART
Silicon Window 01	Silicon	10 mm	1.5 mm	λ/4	20/10	Uncoated	2 Weeks	$80
Silicon Window 02	Silicon	10 mm	1.5 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$80
Silicon Window 03	Silicon	10 mm	1.5 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$80
Silicon Window 04	Silicon	12.5 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$80
Silicon Window 05	Silicon	12.5 mm	2 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$80
Silicon Window 06	Silicon	12.5 mm	2 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$80
Silicon Window 07	Silicon	12.7 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$80
Silicon Window 08	Silicon	25 mm	1 mm	λ/4	20/10	Uncoated	2 Weeks	$90
Silicon Window 09	Silicon	25 mm	1 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$90
Silicon Window 10	Silicon	25 mm	1 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$90
Silicon Window 11	Silicon	25 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$90
Silicon Window 12	Silicon	25 mm	2 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$90
Silicon Window 13	Silicon	25 mm	2 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$90
Silicon Window 14	Silicon	25 mm	3 mm	λ/4	20/10	Uncoated	2 Weeks	$90
Silicon Window 15	Silicon	25 mm	3 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$90
Silicon Window 16	Silicon	25 mm	3 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$90
Silicon Window 17	Silicon	25.4 mm	1 mm	λ/4	20/10	Uncoated	2 Weeks	$90
Silicon Window 18	Silicon	25.4 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$90
Silicon Window 19	Silicon	25.4 mm	3 mm	λ/4	20/10	Uncoated	2 Weeks	$90
Silicon Window 20	Silicon	30 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$100
Silicon Window 21	Silicon	30 mm	2 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$100
Silicon Window 22	Silicon	30 mm	2 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$100
Silicon Window 23	Silicon	50 mm	1 mm	λ/4	20/10	Uncoated	2 Weeks	$150
Silicon Window 24	Silicon	50 mm	1 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$150
Silicon Window 25	Silicon	50 mm	1 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$150
Silicon Window 26	Silicon	50 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$150
Silicon Window 27	Silicon	50 mm	2 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$150
Silicon Window 28	Silicon	50 mm	2 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$150
Silicon Window 29	Silicon	50 mm	3 mm	λ/4	20/10	Uncoated	2 Weeks	$150
Silicon Window 30	Silicon	50 mm	3 mm	λ/4	20/10	AR/AR@(1650-3000)nm	2 Weeks	$150
Silicon Window 31	Silicon	50 mm	3 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$150
Silicon Window 32	Silicon	50.8 mm	1 mm	λ/4	20/10	Uncoated	2 Weeks	$150
Silicon Window 33	Silicon	50.8 mm	2 mm	λ/4	20/10	Uncoated	2 Weeks	$150
Silicon Window 34	Silicon	50.8 mm	3 mm	λ/4	20/10	Uncoated	2 Weeks	$150
Silicon Window 35	Silicon	76.2 mm	3 mm	λ/4	20/10	AR/AR@(3000-5000)nm	2 Weeks	$250

Crystal Type	Cubic
Lattice Parameter	a=5.43Å
Melting Point	1417℃
Mohs Hardness	7
Transmission Band	1.5-8um
Density	2.329g/cm3
Young’s Modulus	130.91 GPa @40℃
Thermal Conductivity	1.63W/cm/K
Specific Heat	0.18cal/g/K @25℃
Thermal Expansion	2.6x10-6/℃ @20℃

Attribute	Specification
Dimension Tolerance(mm)	+0/-0.1
Thickness Tolerance(mm)	±0.05
Flatness(@633mm)	λ/10
Surface Quality	20/10
Parallelism	30 arc sec
Perpendicularity	5 arc min

What is the transmission and application of Silicon window ?

Silicon windows have a transmission window in the range of 1.2 to 7.0 µm, making them ideal for infrared (IR) applications. They offer good transmittance within this wavelength range. Additionally, silicon windows have a low density of 2.329 g/cm³, making them suitable for weight-sensitive applications.Silicon windows are used in infrared (IR) optics for applications such as thermal imaging, spectroscopy, infrared communication, aerospace and defense, medical imaging, environmental monitoring, and research and development.

What is the application of Silicon Mirrors ?

Silicon mirrors have applications in optical systems, laser systems, spectroscopy, high-power laser applications, aerospace and defense, scientific research, and industrial applications. They are used for reflecting and controlling light in various fields, ranging from astronomy to laser-based manufacturing. Silicon mirrors play a vital role in ensuring accurate reflection, beam manipulation, and reliable performance in diverse applications.

Test Equipment : Nexview™ 650: Large Format Inspection & Metrology

Product Specification :

Material: Optical Grade Silicon

Diameter: 101.6 mm

Thickness: 10 mm

One side polishing，The other side fine grinding

Clear Aperture: ＞90%

Flatness： Lambda/20 @632.8nm

Surface Quality: 10/5 per MIL-PRF-13830

Parallelism: ＜1 arc min

Protective Chamfer

Test Result：Fully achievable the Flatness of Lambda/20

The flatness report of Silicon Window.webp