How to choose lwir athermal lens correctly?

Long Wave Infrared (LWIR) lenses are lenses used in the infrared spectral range, usually working in the 8-14 micron band. The following are some common parameters of LWIR lenses and their main application scenarios:

Focal Length: Focal length refers to the distance from the lens to the focal point, usually in millimeters (mm) as the unit. Different focal lengths will affect the field of view and magnification of the lens.

F/# (F-number): F/# is a parameter used to indicate the aperture size of the lens, also known as the aperture ratio. It is the ratio of the focal length to the effective aperture diameter, usually expressed in the form of F/1.x. A smaller F/# value means a larger aperture opening, allowing for a higher amount of light transmission.

Minimum Focus Distance: The minimum focus distance is the distance required for the closest object that the lens can capture. A smaller minimum focus distance means the lens can capture closer objects.

Field of View (FOV): The field of view refers to the range of view that the lens can capture, expressed in degrees or radians. A larger field of view means the lens can capture a wider area.

The main application scenarios are as follows:

Thermal Imaging: Long-wave infrared lenses are widely used in thermal imaging technology. They capture and measure the infrared radiated heat of objects for detection, monitoring and identification of heat distribution, temperature differences and hidden objects.

Security monitoring: LWIR lenses are suitable for security monitoring in low-light or night situations. By capturing the infrared radiation of targets, they can provide surveillance images in dark environments for detecting and tracking people, vehicles, etc.

Environmental monitoring: LWIR lenses can be used for environmental monitoring and measurement, such as fire warning, gas leak detection, temperature measurement, etc. Infrared radiation is very sensitive to detect abnormal temperatures, hot spots, and heat sources, so it can be applied to various environmental monitoring needs.

Industrial testing and non-destructive testing: LWIR lenses can be used for fault diagnosis of industrial equipment, thermal analysis of circuit boards, detection of pipelines and hidden damage, etc. Through thermal imaging technology, potential problems can be discovered and solved in time, and the efficiency of industrial production and equipment maintenance can be improved.

In short, LWIR lenses are suitable for applications that require infrared radiation detection or thermal imaging, including thermal imaging, security monitoring, environmental monitoring, and industrial inspection. When selecting a model, parameters such as focal length, F/#, minimum focal length, and field of view should be considered according to specific application requirements.