The Current Application Status and Development Trend of Optical Sensors

Abstract

An optical sensor is a device that can convert optical signals into electrical signals. Its core function is to sense relevant information in the external environment by detecting changes in optical properties such as light intensity, wavelength, phase, or propagation direction, and then convert this information into electrical signals that can be processed by electronic devices. This article provides a comprehensive overview of optical sensors. It begins by explaining their working principle, which involves the interaction between light and matter to convert external physical quantities into detectable optical signals. The sensors are categorized based on their operating principles and the physical quantities they measure. The discussion then moves to their current applications: in industry, they support automated production and quality control; in healthcare, they are used for diagnosis, treatment, and health monitoring; in transportation, they enable intelligent traffic management and vehicle safety assistance; and in consumer electronics, they enhance device functionality and user experience. Finally, this paper will explore future trends, including integration with AI for smarter systems, miniaturization to meet the demand for smaller devices, improvements in accuracy and sensitivity for high-end applications, multi-modal fusion for more comprehensive data, and the adoption of new principles and materials to drive technological innovation.