Abstract: A telecentric illumination and photographing system for detection of marine microscopic organisms includes an optical path module and an illumination drive module, where the optical path module includes: an LED light source, a light homogenizing rod, a decoherence light homogenizing sheet, a diaphragm, a telecentric collimation camera, where a light beam emitted from the diaphragm is incident into a microscopic organism area with uniform illuminance after passing through the telecentric collimation camera; and a telecentric imaging camera, matching the telecentric collimation camera to receive an illumination beam passing through the microscopic organism area and output the illumination beam to an imaging unit, to obtain an imaging result of uniform illuminance. Further, the illumination drive module enables the LED light source to work in a stable state in which light emitting intensity is constant, thereby improving current output accuracy.

Abstract: A telecentric illumination and photographing system for detection of marine microscopic organisms includes an optical path module and an illumination drive module, where the optical path module includes: an LED light source, a light homogenizing rod, a decoherence light homogenizing sheet, a diaphragm, a telecentric collimation camera, where a light beam emitted from the diaphragm is incident into a microscopic organism area with uniform illuminance after passing through the telecentric collimation camera; and a telecentric imaging camera, matching the telecentric collimation camera to receive an illumination beam passing through the microscopic organism area and output the illumination beam to an imaging unit, to obtain an imaging result of uniform illuminance. Further, the illumination drive module enables the LED light source to work in a stable state in which light emitting intensity is constant, thereby improving current output accuracy.