Engineered Diffusers for LiDAR Flood Illumination

LiDAR, or Light Detection and Ranging, measures distance by emitting laser light and analyzing the returned signal. It is used to create spatial information for applications such as automotive sensing, industrial automation, robotics, mapping, security, and surveying. In flood-illumination architectures, engineered optics distribute emitted light across a defined field so the system can illuminate the intended scene efficiently and consistently.

LiDAR is commonly categorized as terrestrial, airborne, and mobile based on how the system is deployed. Terrestrial LiDAR is mounted on a fixed ground location, airborne LiDAR is carried by aircraft or drones, and mobile LiDAR is mounted on moving platforms such as vehicles. Other classifications may describe scanning method, wavelength, or intended application, so terminology can vary by industry.

Engineered diffusers shape and spread source light into a specified angular distribution rather than allowing an uncontrolled beam pattern. For LiDAR flood illumination, this can help match illumination to the sensor field of view, improve spatial uniformity, limit wasted light outside the target area, and support compact optical packaging. The required pattern depends on the source, wavelength, sensing range, and system geometry.

Yes. Diffuser design should account for the operating wavelength, source characteristics, desired field coverage, transmission needs, and downstream sensor requirements. Apollo provides optical design, polymer material expertise, and thin-film coating capabilities across UV, visible, and NIR ranges. Evaluating these elements together helps ensure the selected geometry and materials support the intended illumination performance.

A productive starting package includes the laser wavelength, source divergence, target angular distribution, illumination uniformity objective, clear aperture, mechanical envelope, expected environment, and projected production volume. Information about the receiver field of view and acceptable stray light is also valuable. Existing optical layouts or performance data can support design verification, tolerance analysis, and a practical manufacturing review.

Validation typically combines optical simulation, tolerance analysis, prototype evaluation, and measurement of critical component parameters. Apollo’s in-house metrology equipment supports mechanical and optical surface measurements, profiling, interferometry, microscopy, and polarization-related measurement where applicable. The validation plan should be tied to the actual performance requirements, including beam distribution, surface quality, dimensional tolerances, and assembly interfaces.

Yes. Single-point diamond turning can produce small quantities of custom optical prototypes before production molding. This allows teams to evaluate form, fit, and optical behavior while refining the design for manufacturability. Once requirements are established, polymer injection molding provides a path toward consistent production components, with coating and assembly options available when the optical system requires them.

Material selection depends on wavelength, optical clarity, birefringence, thermal exposure, chemical resistance, durability, and cost goals. Apollo works with optical polymers including acrylic, styrene, Zeonex, Zeonor, Ultem, polycarbonate, and specialty resins. The appropriate choice should be evaluated alongside the optical geometry, coating needs, manufacturing method, and operating environment rather than selected on a single property alone.