K9 Biconvex Lens

K9 biconvex lenses are commonly used in imaging, beam expansion or contraction, convergence and other applications to focus collimated beams or collimate point light sources. It has the characteristics of high purity, high transparency, thermal stability, and low refractive index. The design of a biconvex lens allows parallel beams of light to converge at a point, which is commonly used in laser systems to increase the degree of focus of the beam. Manufacturing requires precise machining and polishing processes to ensure its surface quality and optical performance. It can be coated with MgF2, UV-AR, UV-VIS, VIS-EXT, VIS-NIR, NIR I, NIR II, Telecom NIR, SWIR, SWIR, YAG-BBAR and other 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)	Focal Length(mm)	Center Thickness(mm)	Edge Thickness(mm)	Design Wavelength(μm)	Radius of Curvature(mm)	Surface Quality
	Screen Reset 2-300	Screen Reset 15-5000	Screen Reset 0.12-60	Screen Reset 0.12-60	Screen Reset 可定制	Screen Reset 可定制	Screen Reset 60-40
More+ Less	2-300	15-5000	0.12-60	0.12-60	可定制	可定制	60-40
K9玻璃双凸透镜 Number：PG205- Dia(mm)：2-300 Focal Length(mm)：15-5000 Center Thickness(mm)：0.12-60 Edge Thickness(mm)：0.12-60 Design Wavelength(μm)：可定制 Radius of Curvature(mm)：可定制 Surface Quality：60-40 Diameter Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：K9 Power@632.8nm：/ Irregularity@632.8nm：/ PV@632.8nm：λ/4 Centering：<3′ Clear Aperture：>90% Coating：未镀膜 REACH：符合标准 ROHS：符合标准

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-1for -30/+70 degC]	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