Device for realizing automatic focusing of telephoto lens based on automatic distance measurement

The invention discloses a device for realizing automatic focusing of a telephoto lens based on automatic distance measurement, and the key point of the technical scheme is that the telephoto lens based on automatic distance measurement is realized by adopting the following method steps: obtaining a distance value and a theoretical value of a focusing clear position of a motor through an object distance test experiment; forming a matrix type data list and generating a target code; starting up for self-test, carrying out sampling for multiple times, and calculating an offset value; looking up the table in the theoretical value information program according to the change of the object distance; and determining whether the offset value is in a positive direction or a negative direction based on a comparison of the actual value and the theoretical value of the focus position. According to the device for realizing automatic focusing of the telephoto lens for automatic distance measurement, problems that blurred ima