The field of view (FOV) refers to the extent of the observable world or the visible area that can be seen at any given moment through a device, such as an optical instrument, camera, or sensor. It is the angular or spatial extent of the observable environment as seen from a specific vantage point or through a particular instrument.
Key points about the field of view include:
Angular measurement: The field of view is often expressed in angular units, such as degrees, minutes, or radians. It indicates the angular size of the area visible to an observer or through a specific optical instrument.
Optical devices: In the context of optical instruments like cameras, binoculars, microscopes, and telescopes, the field of view defines the width of the scene that can be captured or observed. A wider field of view encompasses more of the surrounding environment.
Sensors: In the realm of sensors and imaging devices, the field of view describes the portion of the scene that a sensor can capture or the area covered by a detector array. In remote sensing and surveillance applications, a wider field of view may be desirable for monitoring larger areas.
Navigation and robotics: The field of view is crucial in applications involving navigation, robotics, and autonomous systems. It influences the range and spatial awareness of sensors, cameras, or LiDAR systems used for perception and decision-making.
Human vision: In the study of human vision, the field of view refers to the extent of the visual scene that the eyes can perceive without moving. The human field of view is approximately 180 degrees horizontally, although the central portion has higher acuity.
Virtual reality and augmented reality: In virtual reality (VR) and augmented reality (AR) systems, the field of view defines the extent of the virtual or augmented content visible to the user. A wider field of view contributes to a more immersive experience.
Understanding and managing the field of view are important considerations in the design and application of various optical and imaging systems, impacting the user experience, situational awareness, and the overall effectiveness of the technology.