ZnSe 306068 Plano/Convex Amada Laser Focus Lens 1.5” dia x 7.5” FL ET= .300”-NIB

A ZnSe lens refers to a lens made from zinc selenide (ZnSe), a material known for its excellent optical and thermal properties. ZnSe lenses are commonly used in applications that involve infrared (IR) light, particularly in the mid-wave infrared (MWIR, 3-5 µm) and long-wave infrared (LWIR, 8-12 µm) ranges.

Properties of ZnSe

1. Broad Transmission Range: ZnSe has a wide transmission range from ~0.6 µm to 16 µm, covering visible to far-infrared wavelengths.
2. Low Absorption in IR: It has low absorption in the IR spectrum, making it ideal for CO₂ laser systems (10.6 µm wavelength).
3. High Thermal Resistance: ZnSe can withstand high thermal loads, making it suitable for high-power laser systems.
4. Low Refractive Index: The material has a refractive index of about 2.4, allowing for minimal reflection loss when paired with anti-reflective coatings.
5. Chemical and Mechanical Stability: ZnSe is chemically stable but relatively soft, requiring care during handling to avoid scratching.

Common Applications

1. CO₂ Laser Optics: ZnSe lenses are widely used in high-power CO₂ laser cutting, engraving, and welding systems.
2. Thermal Imaging: ZnSe is used in thermal cameras and IR imaging systems, particularly in the 8-12 µm range.
3. Spectroscopy: It serves as a key component in FTIR (Fourier-transform infrared) spectrometers.
4. Medical Systems: Utilized in some laser surgery and diagnostic equipment.

Types of ZnSe Lenses

• Plano-Convex (PCX): Focuses light to a single point; ideal for collimating or focusing IR beams.
• Plano-Concave (PCV): Diverges light; used in beam expansion systems.
• Meniscus Lenses: Reduces spherical aberrations in imaging and laser systems.
• Aspheric Lenses: Minimizes spherical aberrations for improved focus and imaging.

Maintenance and Care

• Avoid Scratching: ZnSe is relatively soft (Mohs hardness ~2.5), so handle with care and store in a safe place.
• Clean with Care: Use gentle, non-abrasive cleaning methods and approved solvents (e.g., acetone or isopropanol).
• Avoid Contaminants: Protect ZnSe lenses from water and acidic environments, as these can degrade the material.

Avoid Contaminants: Protect ZnSe lenses from water and acidic environments, as these can degrade the material.