Luminar Iris

Overview

Luminar Iris is a semi-solid-state automotive LiDAR sensor engineered specifically for the constraints of series-production passenger vehicles — balancing size, weight, power consumption, cost, and long-term reliability. It was Luminar's first sensor refined for high-volume automotive deployment, entering low-volume production in 2022 and reaching high-volume production in 2024.

How It Works

Iris uses a 1550 nm fiber-laser as its light source and steers the laser beam using 2-axis scanning mirrors, rather than rotating the entire sensor unit. This approach — known as semi-solid-state scanning — reduces mechanical complexity while still covering a wide area.

The choice of 1550 nm wavelength is technically significant: light at this wavelength is absorbed by the eye's cornea before reaching the retina, which means higher optical power levels are permissible within established eye-safety limits. Higher transmitted power directly improves the sensor's ability to detect dark, low-reflectivity objects (such as a tire on a road, or dark clothing) at long distances and in low-light or nighttime conditions.

Performance Characteristics

• Detection range (night, low-reflectivity objects): up to 250 m
• Maximum scanning range: up to 600 m
• Resolution: more than 300 points per square degree
• Field of view: 120 × 28 degrees

The angular resolution of more than 300 points per square degree is described as camera-like — meaning the point cloud produced is dense enough to resolve object shape and detail at range, not just detect presence.

Real-World Applications

Iris is integrated into vehicles as part of advanced driver-assistance systems (ADAS) and higher-level autonomy stacks. Its long detection range and fine resolution are particularly relevant for highway driving scenarios, where vehicles travel at high speed and require early detection of hazards. The sensor's night performance addresses one of the core limitations of camera-only systems, which degrade significantly in low-light environments.

LiDAR at this performance level is typically used in combination with cameras and radar within a sensor-fusion architecture, where each modality compensates for the weaknesses of the others. Iris contributes precise depth and reflectivity data that cameras cannot directly measure.

Production Status

Luminar Iris entered low-volume series production in 2022 and high-volume series production in 2024, making it one of the few automotive-grade LiDAR sensors to have reached genuine volume manufacturing for passenger vehicle integration.