Conceptual structure and principle of integrating sphere

Integral ball is a wall coated with white diffuse reflection material of the hollow sphere, also known as photometric Ball, light pass ball and so on. The ball wall is provided with one or more window holes, which are used as light inlet holes and receiving holes for placing light receiving devices. The inner wall of the integrating sphere should be a good sphere, and the deviation from the ideal sphere should be less than 0.2% of the inner diameter. The inner wall of the sphere is coated with the ideal diffuse reflection material, i. e. the material with the diffuse reflection coefficient close to 1. A common material is magnesium oxide or Barium sulfate, which is mixed with a colloidal adhesive and then sprayed on the inner wall. The spectral reflectance of mgo coating is above 99% in the visible spectrum, so the light entering the integrating sphere is reflected many times through the inner wall coating, and uniform illumination is formed on the inner wall. In order to obtain high measurement accuracy, the opening ratio of the integrating sphere should be as small as possible. The aperture ratio is defined as the ratio of the area of the sphere at the aperture of the integrating sphere to the area of the entire sphere inner wall.

Integrating sphere classification

Application and supporting system of integrating sphere

Probe station-necessary equipment for chip testing

Manual probe station for chip testing, integrated monocular microscope with high-definition 1080PCCD camera

Laboratory manual probe station application

Probe stations are mainly used in semiconductor industry, optoelectronic industry, integrated circuit and packaging testing. It is widely used in the research and development of precision electrical measurement of complex and high-speed devices, aimed at ensuring quality and reliability, and reducing the development time and device manufacturing process costs.