Smart Dimming Sunglasses for Photophobia Using Spatial Light Modulator

Abstract

We present a smart sunglasses system engineered to assist individuals experiencing photophobia, particularly those highly sensitive to light intensity. The system integrates a high dynamic range (HDR) camera and a liquid crystal spatial light modulator (SLM) to dynamically regulate light, adapting to environmental scenes by modifying pixel transmittance through a specialized control algorithm, thereby offering adaptable light management to meet the users' visual needs. Nonetheless, a conventional occlusion mask on the SLM, intended to block incoming light, emerges blurred and insufficient due to a misaligned focal plane. To address the challenge of imprecise light filtering, we introduce an optimization algorithm that meticulously adjusts the light attenuation process, effectively diminishing excessive brightness in targeted areas without adversely impacting regions with acceptable levels of luminance.

Main Contributions

• A compact architecture of smart sunglasses for photophobia.
• A control algorithm that meets requirements for comfortable vision and operates solely based on input from thescene camera.
• An eyeglasses-specific optimization strategy aimed at addressing the issue of insufficient dimming due to a blurred occlusion mask.