Modular platform from Largo, FL lets engineers swap filters, sensors, and optics during proof-of-concept testing.

Torrent Photonics has launched SpectroCam 2, a multispectral imaging platform that delivers eight independently configurable spectral channels — more than double the three bands of a conventional RGB camera — across a standard Nikon F-mount optical interface.

The Largo, Florida-based vendor positions the system for machine vision, automated inspection, agriculture, mining, food processing, recycling, and life sciences. Its architecture lets engineers swap filters, image sensors, and lenses without replacing the camera body, a workflow the company argues shortens proof-of-concept cycles.

What differentiates the eight-channel design from fixed-band systems?

Hugh Garvey, director of imaging at Torrent Photonics, framed the gap in practical terms.

"The problem with most MS [multispectral] solutions is that they have a fixed number of spectral bands that can be chosen or used," Garvey said. "The power of the SpectroCam 2 is that the user can choose from a wide array of spectral channels both in terms of bandwidth and center wavelength. Furthermore, a completely different set of filters can be chosen later and easily interchanged to facilitate either a refinement of the current project or a completely different and new one."

That reconfigurability extends to the imager itself. "The lens interface uses a standard Nikon mount as the default so it is easy to swap lenses should the need arise," Garvey noted. "The image sensor and lens are configurable offering the user a wide range of choice in terms of resolution, frame rate, and field of view."

How does SpectroCam 2 compare with liquid-crystal tunable filters?

Engineers weighing filter-wheel architectures against LCTFs typically ask about frame rate. Garvey addressed the tradeoff directly:

"Liquid [crystal] tunable filters are an interesting technology, but they take some time to change states limiting the frame rate which can be achieved often to the point where live action capture is not possible. The SpectroCam 2 will capture many 10s of images/sec (depending on the exact image sensor choice) offering the possibility to capture full multi-spectral data cubes in real time."

That throughput matters for drone-based monitoring, conveyor inspection, and any application where the scene changes between samples.

Where is multispectral imaging gaining traction now?

Garvey catalogued the sectors where buyers have moved beyond pilot deployments:

• Agriculture — NIR/SWIR bands for moisture detection and pigment/chlorophyll analysis
• Mining — mineralogy and ore sorting
• Food processing — contaminant detection
• Recycling — polymer sorting
• Pharmaceutical packaging — bottle fill-level and blister-pack inspection

"Multispectral imaging that extends beyond the capabilities of a conventional RGB camera can be used to detect or determine a wide assortment of materials and circumstances," Garvey said.

What changes when a prototype moves to a production line?

Garvey warned that laboratory results rarely survive field deployment without revision. "There are always situations which may require better resolution, tighter bands, and quite often what might work well in the lab does not work so well when field tested. Speed is also sometimes challenging as well as attaching the camera to a mobile/moving platform."

Production environments add mechanical and regulatory constraints. "Certain production environments may require custom camera packaging for protection from moisture, vibration, airborne particulates, or decontamination requirements," he said. "Custom software may assist with the integration into a production line."

Which sensor swaps typically deliver the largest signal-to-noise gain?

Asked whether customers ever abandon their original wavelength plan mid-project, Garvey pointed to UV and SWIR sensitivity as common upgrade paths.

"When identifying a parameter optically, changing the image sensor to a UV-VIS or VIS-SWIR may improve the signal-to-noise by adding UV or SWIR sensitivity," he said. "It is also quite possible certain features are entirely unidentifiable in the visible part of the spectrum."

The development raises the question integrators now face: whether to standardize on a modular platform like SpectroCam 2, or commit to fixed-band architectures whose spectral coverage cannot expand once a production line is qualified.