IDTechEx: Infrared Tech Transforms Automotive Safety
Infrared (IR) technology is transforming the automotive industry, offering enhanced safety and awareness for drivers and passengers. IDTechEx, in its latest report, "Infrared (IR) Cameras for Automotive 2025-2035: Technologies, Opportunities, Forecasts," delves into the growing adoption of IR sensors for advanced driver assistance systems (ADAS), in-cabin sensing and driver monitoring systems (DMS).
With the continued push for safer and more autonomous vehicles, IR sensors are poised to play a crucial role in next-generation automotive technology.
Infrared sensors and ADAS: Enhancing vehicle autonomy
Advanced driver assistance systems (ADAS) are rapidly evolving, with IR sensors increasingly being integrated to improve safety and efficiency. According to IDTechEx, near-infrared (NIR) sensors are expected to become standard in all vehicles, regardless of autonomy levels. These sensors support driver and occupant monitoring systems, ensuring attentiveness and reducing distractions.
On the other hand, short-wave infrared (SWIR) is predicted to be instrumental in vehicle autonomy, enhancing ADAS features inside and outside the car. Meanwhile, long-wave infrared (LWIR) is gaining traction for its ability to assist in automatic emergency braking and sensor fusion with cameras and radar. As safety regulations tighten and more vehicles adopt ADAS features, the opportunities for IR technologies will only expand.
The role of IR sensors alongside radar and LiDAR
While radar and LiDAR remain key components of autonomous driving systems, their effectiveness can be limited in certain conditions. Typically used with visible light cameras, these technologies struggle in poor visibility scenarios such as nighttime driving, mist and fog. Here, IR cameras offer a significant advantage by enhancing the existing systems and ensuring reliable performance in adverse weather conditions.
However, IR sensors are not without limitations. Unlike traditional cameras, IR sensors cannot detect colour, making reading traffic lights and signposts difficult.
Instead, they function by detecting wavelengths of light that are invisible to the human eye, either from the natural environment or through illumination sources like LEDs. The captured data is then translated into greyscale images, offering critical insights for vehicle safety.
Understanding the different IR technologies: SWIR, NIR and LWIR
SWIR: Seeing through the tight
SWIR sensors are particularly valuable for functioning effectively in low-light conditions such as fog or mist. Unlike traditional cameras, which may struggle in these scenarios, SWIR sensors provide enhanced night vision capabilities. Additionally, their sensitivity to different materials—regardless of colour—enables them to detect hazards like black ice or wet road conditions, thereby preventing potential collisions.
NIR: Monitoring drivers and passengers
NIR sensors require illumination to function. Typically, they emit a light source, such as an LED, reflecting off surrounding surfaces, allowing the sensor to capture critical environmental data.
The primary application for NIR technology is in-cabin sensing, which monitors driver attentiveness, drowsiness, phone usage and seatbelt compliance.
A key advantage of NIR cameras is their ability to generate images similar to those captured by visible light cameras, even in complete darkness.
This makes them ideal solutions for ADAS, particularly for night driving applications.
LWIR: Detecting heat signatures for safety
Unlike NIR and SWIR, LWIR sensors operate passively, detecting body heat to identify pedestrians, animals and other living beings more accurately than conventional imaging technologies.
The technology is primarily found in high-end vehicles as an ADAS enhancement. However, as vehicle safety regulations evolve, IDTechEx anticipates a rise in LWIR adoption, particularly for automatic emergency braking and other critical safety features.
Challenges and future outlook for infrared sensors
Despite their advantages, IR sensors do face certain challenges. According to IDTechEx, longer IR wavelengths result in reduced image resolution, which can limit their dynamic range. Additionally, established alternatives such as LiDAR and radar offer strong performance in adverse weather conditions while providing essential distance and velocity data.
SWIR startups must enter the market at a viable price point to compete effectively. Fortunately, IDTechEx reports that recent cost reductions in SWIR technology are making it increasingly feasible for original equipment manufacturers (OEMs) to implement.
The potential for IR sensor integration with traditional image processing further enhances their attractiveness.
With their unique benefits and adaptability, these sensors are set to become an integral part of the automotive industry's future, solidifying their role in enhancing vehicle safety and autonomy.
While challenges remain, the continued advancement of SWIR, NIR and LWIR sensors—combined with their ability to integrate with existing ADAS systems—ensures their growing presence in the industry. As IDTechEx highlights, the next decade will see a significant rise in IR adoption, ultimately paving the way for safer and smarter vehicles.
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