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ZnSe Focusing Lenses

Zinc selenide focusing lens uses a single point diamond ultra-precision multi-axis free-form surface processing machine tool, through ultra-precision single point turning, grinding, measurement, ultra-precision polishing and other processes, under the condition of precise control of the machine tool and processing environment, to achieve ultra-precision machining of the optical aspheric plastic domain, using ultra-precision correction polishing technology to polish the lens surface. Optical aspherical surface accuracy ≤0.1 micron, surface roughness Ra≤0.01 micron infrared aspherical lens.

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znse cylindrical lens

Specifications of ZnSe Focusing Lenses

ZnSe Focusing Lenses product parameter table
ProjectIndicator requirements
1. MaterialZinc selenide materials
2. DiameterOD≤300mm OD±0.025 or according to customer requirements
3. Center thicknessT±0.01 or according to customer requirements
4. Effective focal lengthaccording to customers needs
5. Working distanceaccording to customers needs
6. Effective apertureED>80% aspheric area
7. CoatingAR coating 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 ZnSe Focusing Lenses

Features of ZnSe Focusing Lenses
  • One-stop customized production: Solar Valley can process a variety of flat convex, double convex, convex and concave structure aspherical ZnSe Focusing Lenses.The shapecan be round, D-type, square and so on.

  • Material: Zinc selenide focusing lens has low absorption to infrared wavelength and can transmit visible light, so it is the first choice material for making infrared lens, window, output coupling mirror and beam expanding mirror.

  • Lens performance: Zinc selenide focusing lenses have very good transmittance in the band 0.5-22μm, especially 10.6μm, and are often used in thermal imaging and FLIR systems, where their excellent low absorption coefficient and high thermal shock resistance make them ideal for high-power CO2 laser applications for focusing or collimating applications in the medium and long wave infrared spectra.

    Product indicators:

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

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

    3. Zinc selenide focusing lens can achieve 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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