Germanium Aspheric Lenses

Overview

Germanium aspheric lenses are infrared optical components used to focus and shape light in long-wave infrared imaging systems. Compared with a simple spherical lens, an aspheric surface can help reduce spherical aberration and support a more compact optical layout.

This page is focused on Germanium aspheric lenses for LWIR thermal cameras, infrared sensing modules, and custom imaging assemblies. Germanium is a high-index IR material, so coating choice, temperature behavior, and mechanical mounting should be reviewed before production.

Why Germanium Aspheric Geometry Matters

Aspheric geometry is useful when the optical design needs fewer elements, better edge performance, or tighter control of spot size across the field. In thermal imaging optics, it can help reduce the number of lens elements while keeping the system compact.

Germanium supports compact LWIR designs because of its high refractive index, but uncoated surface reflection is high. Engineers should confirm coating targets, operating wavelength, aperture, and environmental requirements before ordering.

Key Specification Priorities

• Material: Germanium (Ge) for LWIR optical systems.
• Wavelength range: current product range is 8-14 µm.
• Size range: diameter 10-100 mm and thickness 2-15 mm are retained from the existing product data.
• Geometry: aspheric surface profile should be confirmed against drawing or optical design data.
• Coating: LWIR AR coating or protective coating requirements should be confirmed before production.

Application Guidance

These lenses are suitable for thermal imaging cameras, LWIR sensor modules, machine vision systems, defense and security optics, and compact infrared assemblies where spherical aberration control matters.

If the lens will be used outdoors, in a sealed module, or in a harsh environment, review coating durability, mounting stress, cleaning method, and temperature drift with the optical and mechanical design teams.

Custom Manufacturing Support

Send your drawing, target wavelength, focal length or optical prescription, diameter, thickness, coating requirement, and inspection expectations through OPTOstokes-IROptical contact. OPTOstokes-IROptical can review whether a Germanium aspheric lens, spherical lens, window, or alternate IR optic is the better fit for the system.