Physical photometer is a specialized instrument used in the field of lighting to measure and quantify various photometric properties of light. It is designed with a physical receptor, typically a photodetector, which captures the incoming light and converts it into an electrical signal. The physical photometer is accompanied by a set of calibrated filters, which selectively transmit certain wavelengths of light.
The main purpose of a physical photometer is to directly read and evaluate photometric quantities such as luminous intensity, illuminance, luminance, and color temperature. These measurements are essential for determining the quality and performance of lighting fixtures, lamps, and other light sources.
A physical photometer is meticulously calibrated to provide accurate and reliable readings. Calibration involves the comparison of the instrument's response to known light levels and sources, ensuring that its measurements correspond to established standards. This calibration process guarantees the instrument's ability to provide precise and consistent data.
The physical photometer's ability to directly measure photometric properties distinguishes it from other types of photometric instruments. Unlike relying on calculations or indirect measurements, a physical photometer provides immediate results, making it efficient and convenient for lighting professionals.
Moreover, the physical photometer's versatility allows for adjustments and customization as per specific lighting requirements. It allows the user to interchange filters and adapt the instrument to different light sources or industries. These instruments are commonly used in lighting design, research and development, quality control, and maintenance of lighting systems.
In conclusion, a physical photometer is an instrument equipped with a physical receptor and associated filters, precisely calibrated to measure and read photometric quantities directly. Its ability to provide accurate and immediate results makes it an indispensable tool in the field of lighting.