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A photometric integrating sphere is an indicative spherical structure that measures light, also known as an integrating ball, omnidirectional reflection ball, illuminance detection ball. The following will introduce the structure, principle, use and some common usage skills of the photometric integrating sphere in detail.
Photometric Integrating SphereIt looks like a sphere, integrated with optical materials and light sensors, and is constructed of a metal plate and a layer of reflective film. Inside there is a homogeneous reflector that responds to all wavelengths, so that the external space is illuminated uniformly, and the measurement of its diffuse light illuminance is uniform. The internal reflector is specially designed to uniformly control the distribution of light.
LPCE-2 high-precision spectroradiometer integrating system
Photometric integrating sphereThe principle is : Put the light source in the spherical material, the spherical material can evenly radiate a kind of light from the outside, also known as the light source, to the inner wall of the sphere, and then reflect it to any position where the light source occurs. During reflection, the resulting illuminance is identified and measured to obtain a reliable result.
The main advantage of the photometric integrating sphere is that it can accurately measure the reflectivity of an object's surface, and can accurately understand the influence of the object's change over time on the reflectivity of the object for many years. In addition, since the light rate information can be obtained from it, it is possible to accurately understand the material properties of the illuminated object, that is, material type, luminescence, etc. Highly reflective surfaces can also be accurately measured, which is also beneficial for color correction. In addition, the photometric integrating sphere effectively eliminates possible sensitivity differences and accurately measures the surface reflectance of small objects or just fragments, which is especially important when performing color adjustments such as screens, LCD displays, and labels. In addition, the results of photometric sphere measurements can also support qualitative and quantitative analysis, so they can be used for applications concerning the reflectivity of specific surfaces.
Photometric integrating sphere is commonly used to measure the radiant energy of different types of light sources, such as visible light, ultraviolet light and infrared light, and is also commonly used to detect and measure the performance of lamps and lanterns, as well as to detect the consistency of colors and color contrast. In addition, it will also be used for performance estimation, lighting system design, new product developmentDevelopment and laser instrumentation, sensor radiation measurement and other work.
When using a photometric integrating sphere, it is necessary to place a light source or a photo in it according to its internal special structure, so that the light is evenly radiated, and then use the measuring device to obtain the measurement results . This work requires technicians to grasp the spatial distribution inside the photometric integrating sphere to ensure uniform light emission to ensure accurate measurement. It is recommended to consider physical environmental factors, such as temperature, humidity, air circulation, and strength, before measurement to ensure that the measurement accuracy and precision are guaranteed in different environments.
In actual operation, before measurement, it is necessary to wipe the surface of the integrating sphere with a cleaning tool to prevent fogging, and then adjust the sampling position at a 90-degree angle on the fixing frame according to the operation manual to ensure that the light source emits characteristics and The accuracy of the reflective film to avoid measurement deviation. Finally, when collecting data, the light source and illuminance should be operated synchronously to obtain high-quality and accurate measurement results.
To sum up, the photometric integrating sphere is an illuminance measurement tool that can be used to measure different types of light sources, because of its uniform distribution of illuminance measurement And precision and other characteristics, have been widely used, in actual operation, need to use professional methods to obtain accurate measurement results.
