This paper presents formula to calculate the scanning frequency, scanning Angle, scanning width and excessive focal length of the wide-band laser scanning device.

By counting the number of such X-rays while scanning the frequency of the laser pulse, the team could make a very precise measurement of the photon energy required to drive the 2s-2p transition.

Computer memory play, and set various broadcast modes such as time play, double frequency scanning, low speed, stop motion, paragraphs repeat, etc.