Germanium Lenses

Name: Germanium Lenses
Brand: Shenzhen Solar Valley Scitech Development Co., Ltd.

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 germanium lens represent the pinnacle of optical engineering, designed to deliver unparalleled performance in demanding applications.

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Specifications of Germanium Lenses

Infrared germanium lens product parameter table
project	Indicator requirements
1. Material	Single crystal germanium infrared material.
2. Diameter	OD±0.025 or as per customer requirements
3. Center thickness	T±0.01 or according to customer requirements
4. Effective focal length	according to customers needs
5. Working distance	according to customers needs
6. Effective aperture	ED＞80% aspheric area
7. Coating	AR or DLC coating R＜0.5% @λnm
8. Surface shape	Ultra-high precision Rt≤0.1μm, high precision Rt≤0.5μm, precision Rt≤1μm
9. Surface quality	60-40, 40-20, 20-10

Versatile and Durable Germanium Lenses for Infrared Applications

Germanium lenses, crafted from polished germanium, are known for their ruggedness and resistance to corrosion, making them ideal for harsh environments and applications with constant exposure to the elements. These germanium glass lenses boast the highest refractive index among readily available IR transmitters and exhibit minimal chromatic aberration due to low dispersion, making them perfect for infrared (FLIR and FTIR) field applications, thermal imaging systems, and precision analytic instruments used in harsh conditions. The unique hardness of germanium, with a Knoop hardness of 780, contributes to its durability, although its high density (5.33 g/cm³) requires consideration in weight-sensitive designs. However, germanium is subject to thermal runaway, where transmission decreases as temperature increases, rendering the lens opaque; thus, it should be used at temperatures below 100°C. Germanium offers optimal transmission (over 45%) in the 2-12 μm band, which can be enhanced to about 95% with anti-reflective coatings, making it highly effective for mid-infrared light applications. At Solar Vally, we offer a wide range of germanium lenses, including germanium IR lens, germanium thermal lenses, and germanium lenses for thermal cameras. For those interested in germanium lens prices, we provide competitive options across our extensive product range.

Features of Germanium Lenses

One-stop customized production: Solar Valley processes various infrared 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.