A beam splitter is a lens that divides a beam of light into reflected light and transmitted light, can also separate the two wavelengths of light, such as , the fundamental wave and Double frequency wave of the frequency-doubled laser are separated.It can also be at a certain wavelength (such as 1064nm) or Separation of s-polarized light and p-polarized light in a certain band (such as 450-650nm).

45 degree beam splitter
Base material: Fused quartz, K9 glass
Face shape：:<λ/10 @ 632.8nm Degree of finish：40-20  Chamfer：0.5mm, 45°  Coating：Electron beam deposition multilayer dielectric coating Angle of incidence：0°,45°  Clear aperture :> 85% diameter
laser-damaged threshold ：:>5J/cm2(1.06μm,1ns)

Base material: Fused quartz, K9 glass
Face shape：:<λ/10 @ 632.8nm Degree of finish：40-20 Chamfer：0.5mm, 45° Coating：Electron beam deposition multilayer dielectric coating Angle of incidence：0°,45° Clear aperture :> 85% diameter
laser-damaged threshold ：:>5J/cm2(1.06μm,1ns)

polarization splitting prism 
Base material: Fused quartz, K9 glass
Face shape：:<λ/10 @ 632.8nm Degree of finish：40-20  Chamfer：0.5mm, 45°  Coating：Electron beam deposition multilayer dielectric coating Angle of incidence：0°±2°  Clear aperture :> 85% diameter
Polarization transmittance: Tp≥98%; Ts≤0.2%
 extinction ratio: Tp:Ts>500:1 
Antireflection film on each passing surface:R<0.25%

Polarizing splitter
Base material: fused silica, K9 glass
Surface type: <λ / 10 @ 632.8nm Finish: 40-20 Chamfer: 0.5mm, 45 ° Coating: Multi-layer dielectric film deposited by electron beam Incidence angle: 56.5 ° ± 3 ° Clear aperture:> 85% diameter
Polarization transmittance: Tp≥96%; Ts≤1%
Extinction ratio: p: Ts> 100: 1
Band range: visible area, near infrared

IR coating refers to a coating in the infrared region of 2.5 μm (2500 nm) to 16 μm. There is a big difference between IR coating and near infrared coating in the choice of materials and manufacturing technology. They are mainly used in industrial and medical laser equipment, such as CO2 laser, Er:YAG laser, CO, HF laser.

The DLC coating window is a technique for forming plasma in a high vacuum state and coating the product surface with carbon as the main component of diamond, which is manufactured using PVD or CVD equipment. The DLC coating serves as a window to increase the transmittance in the infrared region, and is applied to products that require high durability and hardness on the surface exposed to the outside. By using a dielectric on one side of the DLC coating, it can show higher transmittance and continue to be a high-quality product for imaging applications.