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Zinc Selenide Lenses

Zinc Selenide lens uses a single point diamond ultra-precision multi-axis free-form surface machining machine, after ultra-precision single point turning, grinding, measurement, ultra-precision polishing and other processes, the lens accuracy can be less than 0.05 microns. Under the condition of precise control of the machine tool and processing environment, the optical aspherical plastic domain ultra-precision machining is achieved. The ultra-high precision correction polishing technology is used to polish the lens surface, and the optical aspherical surface shape accuracy is less than 0.1 micron, and the surface roughness Ra is less than 0.01 micron.

zinc selenide lenses
znse lens

Specifications of Zinc Selenide Lenses

Zinc Selenide Lenses product parameter table
ProjectIndicator requirements
1. MaterialZinc Selenide
2. DiameterOD≤φ300mm   OD±0.025 or according to customers needs
3. Center thicknessCT±0.01 or according to customers needs
4. Effective focal lengthaccording to customers needs
5. Working distanceaccording to customers needs
6. Effective apertureED>80% aspheric area
7. CoatingAR   R<0.5% @λnm
8. Surface shapeUltra high precision Rt≤0.1μm,High precision Rt≤0.5μm, precision Rt≤1μm
9.Surface quality60-40, 40-20, 20-10

Features of Zinc Selenide Lenses

Features of Zinc Selenide Lenses
  • One-stop customized production: Solar Valley processes various plano-convex, biconvex, and convex-concave structure Zinc Selenide lenses according to customer requirements. The lens shape can be circular, D-shaped, square, trapezoidal, etc.

  • Material: Zinc selenide has low absorption to infrared wavelengths and can transmit visible light, which is the preferred material for making infrared lenses, windows, output coupling mirrors and beam expanding mirrors.

  • Lens properties:Zinc selenide has very good transmittance in the 0.5-22μm, especially 10.6μm band, and is often used in thermal imaging and FLIR systems. Its excellent low absorption coefficient and high thermal shock resistance make it ideal for high-power CO2 laser applications. Zinc selenide (ZnSe) plano-convex (PCX) lenses are designed for focusing or collimating applications in medium and long wave infrared spectroscopy.

    Product indicators:

    1. Maximum external dimension of circular zinc selenide lens: OD≤φ300mm

    2. Maximum external dimension of square zinc selenide lens: L×W ≤200×200mm

    3. Zinc selenide lens can reach the following accuracy levels according to customer requirements:

    Ultra-high precision: surface shape error < 0.1μm, surface roughness < 0.01μm

    High precision grade: Surface error < 0.5μm, surface roughness < 0.05μm Precision grade: Surface error < 1μm, surface roughness < 0.1μm

  • Surface defect grade: 60-40, 40-20, 20-10 according to customer requirements.

  • Coating: According to customer requirements for coating, can provide no coating or a variety of broadband anti-reflection coating options.

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