Figure 9-2 Sensor Position

Any physical component that affects the light which illuminates the sensing area of a light sensor also affects the performance of that light sensor. Therefore, for the best performance, make sure to understand and control the effect of these components. Design a window width and height to permit light from a sufficient field of view to illuminate the sensor. For best performance, use a field of view of at least ±35°, or preferably ±45° or more. Understanding and designing the field of view is discussed further in the OPT3001: Ambient Light Sensor Application Guide.