Environmental air quality; proximity control; crowd counting; climate change; the “Internet of Things”. Our world has become an increasingly monitored place where the proliferation of sensors and detectors allows us, and our devices, to better understand and interact with our environments. Photonics is one of the key technologies enabling this growth, facilitating the development and commercialization of low-cost, compact, and robust optical sensors and detectors.To learn abut the intricacies involved with optical filters and how they've evolved, download the white paper.