Method for realizing transient absorption spectrum signal acquisition by using high-speed area-array camera

The invention discloses a method for realizing high-signal-to-noise-ratio femtosecond transient absorption spectrum signal acquisition by using a high-speed area-array camera, and belongs to the field of ultrafast spectrum testing. The femtosecond transient absorption spectrum signal is acquired by using the high-speed area-array camera, and the detection light and the reference light are projected to the same high-speed area-array camera after being split, so that the number of detectors for collecting the reference light signal is prevented from being increased, and the cost is prevented from being greatly increased while the signal-to-noise ratio is increased. The high frame frequency advantage of the high-speed CMOS area-array camera is utilized, the signal-to-noise ratio is improved by greatly increasing the average number of single-point signals, the single-point collection time is kept unchanged, and efficient collection of weak signals is facilitated. On the other hand, when the requirement for the si