Advanced Photonix is a company that has successfully integrated its photodiode and emitter technologies into a variety of applications, including agriculture, pharmaceutical, commercial design, currency, and vending machines. Our optical-interruption circuit is capable of accurately counting the number of objects at extremely high speeds, when an object interrupts the path between the light source and the photodiode. We are one of the top suppliers of photodiodes for optical seed counters to some of the world’s leading farm instrument and sensor manufacturers. We design and manufacture subassemblies, which includes the photodiode and the light source. Our advanced 3D light ray tracing and zoom illuminance mapping are critical tools and expertise that help us meet our customers' requirements.