Spectrometer built-in laser auxiliary device and operation method thereof

The invention discloses a spectrometer built-in laser auxiliary device which comprises a laser transmitter, a cross carved film sleeve and a transparent scale light screen. The cross carved film sleeve is formed by connecting a cross carved film casing and a cross carved film cylindrical base. A cross carved film is arranged on one end face of the cross carved film casing. The laser transmitter is embedded in the cross carved film casing of the cross carved film sleeve. Laser transmitted by the laser transmitter and the axis of the cross carved film sleeve are coaxial. A cross laser beam is formed through the cross carved film. The transparent scale light screen is fixedly connected with the side of the cross carved film cylindrical base of the cross carved film sleeve. Scales are marked at the center of the front of the transparent scale light screen. According to the invention, the cross laser beam is formed through the laser transmitted by the laser transmitter; the transparent scale light screen receives