K9 Round Windows - UM OPTICS

K9 Windows（round）

K9 round windows sheet has characteristics such as high transmittance, high hardness, and high stability, and its shape is circular. The protective window used as an electronic sensor or detector for external environments can separate the environments on both sides, isolating the internal and external components of the instrument, thereby protecting the internal components. K9 circular optical glass has high transmittance and low impurity content, thus ensuring that the magnification of the system will not change. Applied to flat windows, lenses, prisms, etc. UM OPTICS can provide window sheets such as circular, rectangular, wedge-shaped, perforated, and stepped sheets. It can be coated with reflective film, anti reflective film, filter film, spectroscopic film, polarizing film, and metallization film systems.

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All products are provided with invoices, with a tax point of 13.

The product undergoes multiple inspections before being stored, and the quality is guaranteed. Please use it with confidence.

Spot products, shipped within 48 hours. For non stock or customized products, please consult.

International order logistics include DHL, FedEx, TNT, and EMS

When receiving the product, please ensure the integrity of the product packaging box first. If there is serious damage to the appearance, please refuse and contact us, and we will handle it for you as soon as possible.

Optical products are special items and cannot be returned or exchanged unless there is a quality issue with the product itself

If you need customization or bulk production, please contact us online and we will offer you a discounted price.

	Dia(mm)	ThK(mm)	Surface Quality	PV@632.8nm	Parallelism	Bevel(mm)
	Screen Reset 150 76.2 75 50.8 38.1 25.4 25 20 12.7	Screen Reset 10 6.3 4 3 2	Screen Reset 60-40	Screen Reset 2λ λ λ/2	Screen Reset 3′	Screen Reset 0.35
More+ Less	150	10	60-40	2λ	3′	0.35
Φ150mm，Thickness 10mm，K9 Round Windows Number：PG201I003 Dia(mm)：150 ThK(mm)：10 Surface Quality：60-40 PV@632.8nm：2λ Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	76.2	6.3	60-40	2λ	3′	0.35
Φ76.2mm，Thickness 6.3mm，K9 Round Windows Number：PG201H007 Dia(mm)：76.2 ThK(mm)：6.3 Surface Quality：60-40 PV@632.8nm：2λ Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	75	4	60-40	λ	3′	0.35
Φ75mm，Thickness 4mm，K9 Round Windows Number：PG201H001 Dia(mm)：75 ThK(mm)：4 Surface Quality：60-40 PV@632.8nm：λ Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	50.8	4	60-40	λ	3′	0.35
Φ50.8mm，Thickness 4mm，K9 Round Windows Number：PG201F031 Dia(mm)：50.8 ThK(mm)：4 Surface Quality：60-40 PV@632.8nm：λ Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	50.8	3	60-40	λ	3′	0.35
Φ50.8mm，Thickness 3mm，K9 Round Windows Number：PG201F030 Dia(mm)：50.8 ThK(mm)：3 Surface Quality：60-40 PV@632.8nm：λ Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	50.8	2	60-40	λ	3′	0.35
Φ50.8mm，Thickness 2mm，K9 Round Windows Number：PG201F029 Dia(mm)：50.8 ThK(mm)：2 Surface Quality：60-40 PV@632.8nm：λ Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	38.1	2	60-40	λ/2	3′	0.35
Φ38.1mm，Thickness 2mm，K9 Round Windows Number：PG201F001 Dia(mm)：38.1 ThK(mm)：2 Surface Quality：60-40 PV@632.8nm：λ/2 Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	25.4	3	60-40	λ/2	3′	0.35
Φ25.4mm，Thickness 3mm，K9 Round Windows Number：PG201E014 Dia(mm)：25.4 ThK(mm)：3 Surface Quality：60-40 PV@632.8nm：λ/2 Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	25	4	60-40	λ/2	3′	0.35
Φ25mm，Thickness 4mm，K9 Round Windows Number：PG201E008 Dia(mm)：25 ThK(mm)：4 Surface Quality：60-40 PV@632.8nm：λ/2 Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant
More+ Less	20	3	60-40	λ/2	3′	0.35
Φ20mm，Thickness 3mm，K9 Round Windows Number：PG201D001 Dia(mm)：20 ThK(mm)：3 Surface Quality：60-40 PV@632.8nm：λ/2 Parallelism：3′ Clear Aperture：>90% Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Transmission Range：0.38-2.1μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant

Material Data
Optical Properties
Transmission Range	0.35-2μm
Refractive Index	1.5168@587.5618nm 3×10-2@10.6μm
Reflection loss	8.1%@587.5618nm(both sides)
Physical Properties
Density [g/cm3]	2.51
Melting Point [℃]	559
Thermal Conductivity [W/(m•deg C)]	1.114
Thermal Expansion [deg C-1 for -30/+70 deg C]	7.1*10-6
Specific Heat Capacity [J/(kg•deg C)]	0.858*103
Young's Modulus (E) [GPa]	82
Bulk Modulus(K) [GPa]	34
Poisson Coefficient	0.206
Chemical Properties
Solubility / g/L	None

K9 Windows（round）

Technical Parameter

Material Data

Transmittance

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