For suitable thermal imaging lenses, it’s important to consider the specific requirements of your application, such as the desired field of view, spectral range, and thermal sensitivity. Here are some factors to consider:
- Lens Material: Germanium is commonly used for thermal imaging lenses due to its high transmission in the infrared spectrum. Zinc Selenide (ZnSe) and Chalcogenide glasses are also used.
- Coating: Anti-reflective coatings can improve transmission and reduce reflections. DLC (Diamond-Like Carbon) coatings are often used for durability.
- Focal Length: Determines the magnification and field of view. Shorter focal lengths provide wider views, while longer focal lengths offer more magnification.
- Aperture: The size of the lens opening, affecting the amount of light entering the system. Larger apertures can improve sensitivity but may increase cost.
- Compatibility: Ensure the lens is compatible with your thermal imaging camera’s mount.
- Budget: Higher quality lenses with better materials and coatings tend to be more expensive.