A precise angle measurement system was presented based on Malchlson interferometer technology. This system took advantage of the Malchlson interferometer measurement technology used in the geometrical sense measurement and realized the exact measurement towards the big angle by changing the angle displacement to line displacement and using special circuits to subdivide and measure the interference pattern. This system has several merits such as high measurement precision

wide angle range and high digitialization compared with the other similar systems. The principle of the system and the matters should be pard attention to when design this system were prsented

also

precision analysis about the system was given.