Optical Laser Lens ZnSe Plano Convex Focusing Lenses for CO2 Laser

Key Properties of ZnSe Lenses

•  Zinc Selenide ZnSe is a transparent, yellowish polycrystalline substance which transmits in the range range 0.5-21µm. It is ideal for mid-infrared applications, but can also transmit some visible light. This means optics incorporating ZnSe lenses lend themselves to visual inspection when IR light is turned off
  
• Absorption coefficient of Zinc Selenide is 0.0005 cm-1 at 10.6 μm. When used at infrared wavelengths,VY Optics ZnSe lenses have less than 0.3 percent total absorption, as measured using CO2 laser calorimetry. This ultra-low absorption means ZnSe lenses can reduce energy loss and increase accuracy in sensitive instrumentation: a crucial advantage for applications in laser optics where energy is focused on a very small point
  
• Zinc Selenide has a melting point of 1525°C and a thermal conductivity is 18 W m-1 K-1 at 298K. The thermal expansion coefficient is 7.1 x 10-6 /°C at 273K. Zinc Selenide lenses exhibit a high resistance to thermal shock and can be used in thermally demanding applications
  
• The reflectivity of  Zinc Selenide is typically 29.1% at 10.6 μm (2 surfaces), and our ZnSe lenses can be AR coated for minimal energy loss.  Since this is a soft material and can be easily scratched, we suggest kindly using especial care when handling your ZnSe lenses.

Production of a ZnSe Lens

• The highest quality ZnSe blanks are those which have been chemically vapor deposited in production, and these are the blanks we use to craft our precision lenses.  
• After a blank has been roughly cut to the desired size and shape, diamond turning is used to match the exact curve, roughness, and dimension specified in the design.  
• The surface of the lens is polished to high standards.
• For high performance in CO2 laser focusing applications, the lenses are supplied with no coating. However, anti-reflection or other optical coatings can be applied as desired.

People also ask

• What is ZnSe used for?
  A ZnSe lens is a precision optic commonly used in thermal imaging, high power CO2 laser systems and in the life sciences. 
• What is the name of ZnSe?
  Zinc Selenide (ZnSe)
  
• What is ZnSe lens?
  A ZnSe lens is a precision optic commonly used in thermal imaging, high power CO2 laser systems and in the life sciences.
• How do you make ZnSe?
  The ZnSe product was prepared by first dissolving 2 g of PVP in 70 mL of deionized water, followed by vigorous stirring for 2 h at 70 °C. Next, 0.4 mmol of selenium powder was dissolved in 80 mL of ethylenediamine.