How Thermal Imaging and Visible Cameras Work Together in Multispectral Observation

2026-09-29 14:24:00

What Is Multispectral Observation?

A conventional optical camera captures visible light. A thermal camera detects infrared radiation. A low-light imaging system is designed to work with limited visible illumination.

A multispectral observation system combines these different imaging channels in one platform.

The Ferolix FP8-U is designed around this concept. It integrates thermal infrared imaging, low-light imaging and visible imaging while also incorporating laser ranging, satellite positioning, digital magnetic compass, recording and WiFi transmission.

thermal imaging Channel

The FP8-U uses an uncooled VOX thermal detector with 640×512 resolution, 12μm pixel pitch and 8–14μm wavelength range.

The specified NETD is 25mK.

The thermal lens uses a 75mm focal length and provides a stated field of view of 5.8° × 4.7°.

Low-Light Imaging

The low-light channel uses an 800×600 CMOS detector with an 8μm pixel pitch.

The system specifies a sensitivity of 5×10^-4 Lux and a 50mm F1.4 focal-length configuration.

This channel provides a different form of information from thermal imaging and can complement the thermal image under suitable lighting conditions.

Visible Imaging

The visible camera uses a 1920×1080 CMOS sensor with a 20× optical zoom system.

Its field of view ranges from 44° × 34° to 2.3° × 1.7° according to the product specification.

Motorized focusing and day/night switching are also included.

Why Combine Different Channels?

Different imaging channels respond to different environmental information.

Thermal imaging detects infrared radiation. Visible imaging provides conventional optical detail. Low-light imaging provides another imaging method for limited illumination.

By integrating these channels, a product can give users more than one way to observe a target or scene.

Integrated Ranging and Positioning

The FP8-U also integrates a Laser Rangefinder with a specified maximum range of at least 9km for the stated side-view mid-size tank condition and at least 12km for a large building.

The system includes GPS, BeiDou and GLONASS positioning.

It also provides azimuth and pitch measurements through its orientation system.

Recording and Wireless Transmission

The device supports recording under infrared, low-light, visible and fusion modes.

Its storage capacity is specified at 128GB, and USB/WiFi functions support data output and image transmission.

This transforms the platform from a simple observation device into a multifunctional digital imaging system.

B2B Product Opportunities

Multispectral products can appeal to professional distributors who require more than a single imaging channel.

For OEM development, the integration of multiple sensors can support product differentiation while reducing the need for separate equipment.

Conclusion

multispectral imaging combines the strengths of thermal, low-light and visible channels.

The Ferolix FP8-U demonstrates this concept by integrating three imaging channels with ranging, positioning, recording and wireless transmission in one observation binocular.