Fluorescence microscope illumination method and fluorescence assembly utilizing pulsed xenon lamp

A fluorescence microscope fluorescence assembly utilizing pulsed xenon lamp, comprising a wheel disc component, a camera component, and a light source component, wherein:

• the wheel disc component comprises a horizontal wheel disc mounting plate, a lower surface of which is provided with a central shaft extending vertically downward, a mounting shaft driven by a wheel disc driving mechanism is rotatably sleeved on the central shaft, and the mounting shaft is provided with multiple triple-hole fluorescence filter boxes uniformly distributed around its circumference;
• a through hole is provided on the wheel disc mounting plate, and a detection position is located directly below the through hole;
• the wheel disc driving mechanism drives the mounting shaft to rotate at a fixed angle, thereby enabling all the triple-hole fluorescent filter boxes to stay in the detection position in turn;
• the camera component is located directly above the through hole, and the camera component, the through hole and the triple-hole fluorescent filter box located at the detection position are vertically coaxial;
• the light source component is located outside the detection position, and comprises a high-frequency pulsed xenon lamp, a lens, and a side wheel disc driven by a second stepper motor;
• the lens is located directly in front of the high-frequency pulsed xenon lamp, and the position directly in front of the lens is a light-transmitting position;
• the side wheel disc is located in front of the lens and is provided with multiple light source filter holes uniformly distributed around its circumference, each covered with a light source filter;
• the second stepper motor drives the side wheel disk to rotate at a fixed angle, thereby enabling all the light source filter holes to stay in the light-transmitting position in turn;
• the high-frequency pulsed xenon lamp, the lens, the light source filter hole located at the light-transmitting position, and the triple-hole fluorescent filter box located at the detection position are transversely coaxial;
• the wheel disc driving mechanism is composed of a first stepper motor, a first spur gear, a second spur gear, and an angle sensor;
• the first stepper motor is vertically mounted on the wheel disc mounting plate, and both are located on one side of the central shaft and the camera component;
• the first spur gear is fixedly mounted on an output shaft of the first stepper motor, and the second spur gear is sleeved on a periphery of the central shaft and fixedly connected to an upper end surface of the mounting shaft;
• the first spur gear and the second spur gear are at the same height position and mesh with each other;
• the angle sensor comprises a magnetic encoder, a central magnet, a magnet seat, and a socket;
• the magnetic encoder is fixed on an axis of a lower end surface of the central shaft, and the magnet seat is fixedly connected to a lower end surface of the mounting shaft;
• the central magnet is fixed inside the magnet seat and is located directly below the magnetic encoder;
• a cable of the magnetic encoder passes upward through a hollow inner cavity of the central shaft and is connected to the socket;
• the first stepper motor measures the angular displacement of the angle sensor, thereby achieving a fixed angle rotation of the mounting shaft and the alternating docking of all the triple-hole fluorescent filter boxes with a lower end of the through hole;
• the wheel disc component is provided with a first mechanical angle-limiting mechanism, which comprises a first flat spring, a first micro bearing seat, a first micro pin, a first roller, a plurality of first roller positioning counterbores and a plurality of first roller rolling grooves circumferentially provided on the second spur gear;
• an inner end of the first flat spring is fixedly connected to an upper end surface of the central shaft, and an outer end of the first flat spring points in a direction of the detection position;
• the first micro bearing seat is fixed on a lower surface of the outer end of the first flat spring, and the first roller is mounted on the first micro bearing seat through the first micro pin;
• the number of the first roller positioning counterbores and the first roller rolling grooves corresponds to the number of the triple-hole fluorescent filter boxes, and the opening position of the first roller positioning counterbores corresponds to the position of the triple-hole fluorescent filter boxes;
• the opening position of the first roller rolling groove is located between two adjacent first roller positioning counterbores;
• an upper plane of the first roller positioning counterbores is higher than an upper plane of the first roller rolling groove to provide damping and a clamping point for the first roller;
• the light source component is provided with a second mechanical angle-limiting mechanism, which comprises a second flat spring, a second micro bearing seat, a second micro pin, a second roller, a plurality of second roller positioning counterbores and a plurality of second roller rolling grooves opened on a rear side surface of the side wheel disc and arranged around the center of the circle;
• an inner end of the second flat spring is fixedly connected to a front side surface of the motor mounting plate through a flat spring fixing seat, and an outer end of the second flat spring points in a direction away from the detection position;
• the second micro bearing seat is fixedly arranged on a front side surface of an outer end of the second flat spring, and the second roller is mounted on the second micro bearing seat through the second micro pin;
• the number of the second roller positioning counterbores and the second roller rolling grooves corresponds to the number of the light source filter holes, and the opening position of the second roller positioning counterbores correspond to the position of the light source filter holes;
• the opening position of the second roller rolling grooves are located between two adjacent second roller positioning counterbores;
• an upper plane of the second roller positioning counterbores is higher than an upper plane of the second roller rolling grooves to provide damping and a clamping point for the second roller.

A fluorescence microscope illumination method utilizing pulsed xenon lamp, wherein a high-frequency pulsed xenon lamp is used as a light source to provide high-frequency pulsed illumination through epi-illumination to a sample on a slide, including the following steps:

• step 1) generating lateral pulsed light beams using the high-frequency pulsed xenon lamp;
• step 2) filtering the pulsed light beams through a light source filter;
• step 3) reflecting the filtered pulsed light beams downward via a reflector;
• step 4) directing the downward-reflected pulsed light beams onto the slide through an objective lens, wherein a part of the pulsed light beams is reflected upward upon contacting the sample;
• step 5) directing the upward-reflected pulsed light beams sequentially through the objective lens, the reflector, and a fluorescence filter before entering a camera.