When Vision Becomes Thought: The Eye-Tracking Light Source Built for Smarter AI Glasses

Blink, and the moment you’re seeing is instantly captured.

Blink, and the call you want to make starts dialing.

Blink, and the task you’re thinking of gets done.

With AI glasses, a single blink triggers everything in just 0.3 seconds — simple, fast, and effortless. Glasses are no longer just vision correction tools or fashion accessories. Your eyes become your fingers, your mouse, your controller. Wherever you look, whatever you focus on, your eye movements become your commands. When “what I see is what I want,” input becomes flexible, intuitive, and natural. This new generation of integrated hardware and software is here to make everyday life smoother and smarter.

AI glasses are built as a fully integrated system, combining speakers, cameras, eye-tracking modules, and AR displays — far beyond what traditional eyewear could do. They can act as prescription glasses, a smart speaker, or even a health monitor, all in one device. This ecosystem creates a seamlessly connected environment that enhances the experience of your smartphone, laptop, and every smart device you use.

Of course, enabling eye-controlled interaction depends heavily on powerful AI chips and edge-computing algorithms. But high-precision processing requires significant power and creates thermal challenges. That’s why AI glasses must evolve to be lighter, more lifestyle-friendly, and comfortable enough for all-day wear. To achieve this, hardware must become more power-efficient and more miniaturized. And miniaturization is a constant challenge — every millimeter of space demands world-class engineering.

In terms of practical implementation, this work was carried out in collaboration with solution provider GANZIN Technology, jointly proposing an eye-tracking architecture better suited for smart AI glasses. The solution adopts VCSEL technology as the eye-tracking illumination source, requiring only a single VCSEL camera module to detect eye movements in real time.

Through precise and stable near-infrared illumination, the system is able to reliably capture corneal reflections and pupil features. These signals are then processed by AI algorithms to perform high-speed computation and interpretation, converting the user’s gaze and eye movements into accurate command inputs. Compared with conventional designs that rely on multiple IR LEDs and several camera modules, this architecture significantly reduces module size and power consumption. At the same time, it enables users to complete intended actions without manual input, truly realizing an intuitive, gaze-driven human–machine interaction experience.

Eye-tracking technology originally came from medical and research fields. Today, it is rapidly merging into VR and AR platforms to enhance immersion and responsiveness. This integration is improving gaming, training, and simulation experiences, and gradually expanding the consumer market — giving eye-tracking a strong runway for future growth.

Currently, mainstream eye-tracking systems rely on 8–16 IR LEDs per eye plus a camera. Multiple LEDs illuminate the eye from different angles to capture reflection signals. Though each LED is tiny, the high quantity requires extra room for the camera, optical paths, and circuitry. This leads to bulky headsets and glasses, higher power consumption, and designs that are hard to wear for long periods — limiting consumer adoption.

iReach’s Dragonfly VCSEL, measuring only 0.83 × 0.66 × 0.54 mm³, changes that. With our VCSEL-based eye-tracking solution, one VCSEL + one camera is all you need per eye. In previous integrations, a Dragonfly-based module was up to 80% smaller than IR-LED solutions, with the potential to shrink modules to below 2 mm.

Using VCSEL saves more than you think — fewer cameras, less space inside the glasses, and longer battery life.

Before introducing the VCSEL products optimized for eye-tracking, we must first talk about iReach’s core technology: the “Cell” platform.

Built on wafer-fusion technology and enhanced materials, Cell reverses the traditional weaknesses of GaAs VCSELs. It delivers the same optical power while reducing chip size by up to 20%, and it provides a strong, damage-resistant surface — crucial for packaging and secondary optical process possible. Cell allows direct process of packaging materials and even meta-surface optics on the chip itself, enabling ultra-compact packaging and breaking through the physical limits of module miniaturization.

The Cell series maintains all the hallmark advantages of VCSELs:

1. Highly concentrated wavelength with no stray light
2. Excellent wavelength stability — only 0.07 nm shift per °C
3. Array-ready design with uniform illumination for higher precision applications
4. Low power consumption — ideal for portable devices
5. Picosecond-level response speed for high-frequency systems

And Cell adds even more advantages:

1. Direct bonding to module substrates for shorter signal and thermal paths
2. Direct capability for packaging and optics, enabling shorter back focal length
3. Easier integration with camera lenses and sensors, enabling ultra-compact modules and beautiful product designs

Based on Cell, iReach developed the world’s smallest VCSEL illuminator, the P94D40806R, only 0.83 × 0.66 × 0.54 mm³.

It delivers 0.05–0.3 W of optical output — and brightness or beam angle can be customized simply by swapping the design. Need more brightness? We can provide that.

The P94D40806R consumes less than 1 W, offers a 110 × 85 degree illumination angle, and with AI algorithms, a single emitter is enough for eye-tracking.

The device uses optical-grade adhesive packaging, with no wire bonding and no air gaps, allowing direct bonding to module boards. This ensures the shortest path for power, heat flow, and signal response. It’s high integration with cameras and sensors allows portable devices — like smart glasses — to hide the entire module in an extremely small space, making the device lighter, slimmer, and more comfortable, with near-zero wear fatigue.

iReach’s P94D40806R will officially launch in 2026.

We provide VCSEL chips, P94D40806R component specifications, and integration guidelines to help our partners smoothly adopt and optimize iReach’s VCSEL technology.

Please feel free to contact us via our website email or LinkedIn.

In collaboration with Ganzin Technology

✨ Let’s shape the future of sensing — one beam, one breakthrough at a time.