A breakthrough in lens technology could soon put powerful thermal cameras into everyday devices like smartphones and cars at a fraction of the current cost.
According to TechXplore, scientists at Australia’s Flinders University have created a new type of infrared lens using extremely low-cost and widely available materials. These lenses could bring the expensive optics usually found only in specialist equipment to common consumer products.
Thermal cameras work by detecting infrared light released as heat from objects. They are widely used in security systems, fire detection, industrial inspections, medical devices, and vehicle safety systems.
Despite their usefulness, thermal cameras remain rare in consumer products because their lenses are costly and difficult to manufacture. Most infrared lenses today rely on materials like germanium or silicon.
These materials are expensive, hard to process, and vulnerable to damage. A single lens can cost hundreds or even thousands of dollars. This has kept thermal imaging limited to professional and industrial equipment.
A plastic-like lens that changes the cost equation
According to the research paper, the new lens is made from a polymer created using elemental sulfur and a low-cost organic compound. Sulfur is widely available and produced in large quantities as a by-product of petroleum refining. This polymer can be shaped using molding techniques similar to those used for plastics.
In fact, the raw material cost for a single lens can be less than one cent. These lenses can also be produced quickly, repaired if damaged, and recycled at the end of their life. Meanwhile, traditional infrared lenses are usually discarded once they crack or degrade.
The technology opens the door to embedding thermal imaging in everyday technology. Cars could use them for improved driver assistance and night visibility. Smartphones could gain heat-sensing features for safety, diagnostics, or energy monitoring.
The researchers are also working with partners at NASA to explore how this lens could be used in planetary science and other advanced imaging applications. If this technology reaches consumer devices, heat-sensing cameras could become as common as regular cameras in phones and cars.
Advancements in smartphone imaging are also accelerating on other fronts, with researchers exploring radically new camera lenses that could dramatically expand what phones are able to see and detect.