Device for quickly detecting air microorganisms

The invention provides a device for quickly detecting air microorganisms, and belongs to the technical field of environmental monitoring. A laser light source, a convergent lens, a pinhole plate, a collimating lens, a diaphragm, a Fourier lens, a sample cell and a center detector are located on the same central axis and are sequentially arranged from left to right. The center detector is located on a focal plane of the right side of the Fourier lens and formed by the arrangement of photoelectric detection planes in a hemi-toroidal shape. The circular ring widths of the hemi-toroidal-shaped photoelectric detection planes are gradually increased from the center of a circle to outside and the center is hollow. A right-angle detector is located in the direction perpendicular to the central axis. An annular detector is located on an arc formed by the center detector and the right-angle detector and formed by a series of rectangular photoelectric detection planes which are archwise arranged at equal intervals. The right-angle detector, the annular detector, the center detector and a fluorescent detector are connected with a data processing unit through cables. According to the device, complicated operation processes, such as augmentation, culture and marking are avoided, and the device has real-time and efficient advantages.