High Purity Germanium Crystal Optical LWIR Germanium Plano Concave Lens Export AR Coating for IR Cameras and Gas Analysis Systems

Name: High Purity Germanium Crystal Optical LWIR Germanium Plano Concave Lens Export AR Coating for IR Cameras and Gas Analysis Systems
Brand: Henan UM Optics Ltd
Availability: InStock

Description

Germanium (Ge) plano-concave lenses are high-density premium infrared optical components consisting of one flat surface and one concave surface. Made of high-purity monocrystalline germanium material, this negative focal length lens features an extremely high refractive index and excellent mid-infrared transmittance. With low internal defects, uniform crystal structure and stable optical performance, it is specially designed for infrared beam divergence, optical aberration correction and infrared optical path matching. Germanium plano-concave lenses have excellent thermal stability and environmental durability, widely used in high-end infrared thermal imaging, military optics and precision detection systems.

Specifications

Material:	Ge
Lens Type:	Plano-Concave
Size:	custom
Dimension Tolerance:	+0/-0.1mm
Surface Quality:	60-40,40-20,or better
Surface Flatness:	4/λ

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Features

Ultra-high Refractive Index: Greatly reduces lens curvature, facilitating ultra-compact and miniaturized infrared optical system design
Excellent Infrared Transmittance: Stable transmission performance in the spectral range of 2μm to 14μm
Low Internal Scattering: High-purity crystal material minimizes impurities and inclusions to ensure clear infrared beam quality
Strong Environmental Stability: Good hardness and chemical inertness, resistant to oxidation and moisture erosion
Customized Infrared Coating: Compatible with anti-reflection and hard carbon coating to improve transmittance and surface durability

Applications

High-end Thermal Imaging Devices: Used for beam divergence and aberration correction in night vision and infrared thermal cameras
Military & Aerospace Optics: Applied in infrared tracking, monitoring and precision detection optical systems
Mid-infrared Spectrometers: Suitable for infrared gas analysis and molecular spectrum detection equipment
Infrared Optical Combination Assembly: Cooperates with convex lenses to optimize imaging quality and compress optical structure
Precision Scientific Research: Utilized for infrared beam shaping and optical path debugging in laboratory infrared platforms

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Frequently Asked Questions

Why is germanium lens suitable for miniaturized infrared instruments?

Its ultra-high refractive index can achieve the same divergence effect with smaller curvature radius, effectively reducing lens thickness and system volume for portable compact infrared equipment.

Does temperature change greatly affect germanium optical performance?

Yes. Germanium has a high temperature refractive coefficient. It is not recommended for high-temperature environments above 60°C, which will cause obvious imaging drift.

What coating is most recommended for germanium plano-concave lens?

DLC hard coating is the best choice. It improves infrared transmittance and provides scratch resistance, waterproof and anti-oxidation protection for fragile germanium material.

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