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Germanium Lenses

Germanium lenses are crafted with exceptional precision using a single-point diamond ultra-precision multi-axis free-form surface machining tool. This sophisticated process includes ultra-high-precision single-point turning, meticulous grinding, accurate measuring, and advanced polishing techniques. Every step is conducted under stringent control over both the machinery and the environment to ensure the highest level of precision in the optical aspheric domain. The use of cutting-edge correction polishing technology further enhances the lens surface, culminating in infrared aspheric lenses that boast an optical aspheric surface shape accuracy of ≤ 0.1 micron and a surface roughness of Ra ≤ 0.01 micron. These lenses represent the pinnacle of optical engineering, designed to deliver unparalleled performance in demanding applications.


germanium lenses
germanium lens

Specifications of Germanium Lenses


Infrared germanium lens product parameter table
projectIndicator requirements
1. MaterialSingle crystal germanium infrared material.
2. DiameterOD±0.025 or as per 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 or DLC 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 Germanium Lenses

Features of Germanium Lenses
  • One-stop customized production: Solar Valley processes various infrared aspherical lenses with plano-convex, biconvex and convex-concave structures according to customer requirements. The lens shape can be circular, D-shaped, square, trapezoidal and other structures.

  • Material: Single crystal germanium infrared material, in the range of 2-12 μm, germanium is the most commonly used material for producing lenses and efficient infrared windows in imaging systems, and can serve as the substrate for lenses, windows and output coupling mirrors.

  • Lens properties: uniform light spot, clear projection, complete specifications, aerospace quality, used in night vision goggles, medical endoscopes, laser processing, infrared thermal imaging cameras, temperature recorders, infrared fundus cameras, satellite infrared telescopes, etc.

    Product indicator description:

    1. Maximum dimensions of circular infrared aspheric lens: OD≤φ150mm

    2. Maximum dimensions of square infrared aspheric lens: L×W ≤100×100mm

    3. Infrared aspherical lenses can reach the following accuracy levels according to customer requirements:

    Ultra-high precision grade: surface 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. Produced according to customer requirements.

  • Coating: Coating according to customer requirements.

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