Resources/CAMCUDA Wiki/Focal length
Optics & field of view

Focal length

Lens geometry

CAMCUDA WIKIUpdated 29 October 20262 min read

A lens parameter that helps set scene coverage for a given detector.

What it means

Focal length is commonly specified in millimetres. With the same detector dimensions, a longer focal length generally gives a narrower field of view.

Two products using a lens with the same nominal focal length can have different FOVs because the detector size, optical design or quoted angle convention differs.

In practice

Integration note

Specify focal length together with detector resolution, pixel pitch, horizontal/vertical FOV and the matching assembly drawing.

Try it with your configuration

Open the thermal imaging calculator ↗ to explore field of view and geometric scene coverage.

FOVIFOVAthermal lens

Related product resources

AeroMini-640 ↗60 Hz imaging640 × 512 · 12 µmThermoCore-640 ↗640 × 512 · 12 µm · UVC / UART

Continue with an Engineering Guide ↗

Sources & further reading

  1. AeroMini 640 Non-radiometric Product Specifications V1.0.0.pdf
  2. AeroMini 640 Radiometric Product Specifications V1.1.0.pdf
  3. ThermoCore 640 Product Specifications V1.1.0.pdf

Concept explanations are general. Use the matching product, lens, interface board and firmware documentation for the delivered configuration.

← FFCFOV →