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Magnesium Fluoride Lenses

Magnesium fluoride lens uses ultra-precision multi-axis free-form surface machining machine, after ultra-precision fine grinding, 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 aspherical plastic domain, the use of ultra-precision correction polishing technology to polish the lens surface. Optical aspherical surface shape accuracy ≤0.1 micron, surface roughness Ra≤0.01 micron infrared magnesium fluoride lens.

mgf2 lens
mgf2 window
magnesium fluoride window

Specifications of Magnesium Fluoride Lenses


Magnesium Fluoride Lenses product parameter table
ProjectIndicator requirements
1. MaterialMagnesium Fluoride materials
2. DiameterOD≤φ150mm 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 Magnesium Fluoride Lenses

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

  • Material: Magnesium fluoride is tetragonal crystal system, characterized by anisotropy. Therefore, single crystals are considered in precision imaging and signal transmission. Magnesium fluoride (MgF2) is an excellent infrared optical material with a transmittance range of 0.12-10um, which is not easy to be chaotized, and a refractive index of about 1.38, which is a very excellent ultraviolet band material and the most important low-refractive index lens material.

  • Lens performance: CVD magnesium fluoride (MgF2-CVD) has good mechanical properties, chemical stability, impact resistance, heat wave resistance and radiation ability. Although it has excellent transmittance in the 0.11 to 9 um range, it is suitable for optical lens, wedge and window manufacturing. MgF2 is also considered to be a durable material in deep ultraviolet and long-wave infrared applications.

    Product indicators:

    1. The maximum external dimension of circular magnesium fluoride lens: OD≤φ150mm

    2. Maximum external dimension of square magnesium fluoride lens: L×W ≤100×100mm

    3. Magnesium fluoride 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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