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Barium Fluoride Lenses

Barium fluoride lens is processed by 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, ultra-precision machining in the plastic field of optical aspheric surface is realized. Ultra-precision correction polishing technology is used to polish the lens surface. Optical aspherical surface shape accuracy ≤0.1 micron, surface roughness Ra≤0.01 micron infrared barium fluoride lens.

barium fluoride lenses
baf2 lens
barium fluoride window

Specifications of Barium Fluoride Lenses


Barium Fluoride Lenses product parameter table
ProjectIndicator requirements
1. MaterialBarium 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 Barium Fluoride Lenses

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

  • Material: Barium fluoride (BaF2) has an optical transmittance of nearly 90% in the 200-9500nm optical range and is commonly used in lenses, beam splitters, prisms and window plates in cryogenic refrigeration imaging systems, aerospace optical systems and laser optical systems.

  • Lens performance: Barium fluoride lens crystal belongs to the cubic crystal system, with excellent moisture resistance, melting point 1280℃, so that BaF2 components work at extremely high temperatures, little change in refractive index in a wide wavelength range, wide transmission range.

    Product indicators:

    1. Maximum outer dimension of circular barium fluoride lens: OD≤φ150mm

    2. The maximum external dimension of square barium fluoride lens: L×W ≤100×100mm

    3. Barium 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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