Why does the laser scanning confocal microscope provide better imaging quality?
The principle of laser confocal microscopy is that the light beam emitted by the LED light source is focused onto the surface of the sample after passing through a porous disk and objective lens. Afterwards, the light beam is reflected back to the measurement system through the surface of the sample. When passing through the pinhole on the MPD again, the reflected light will only retain the focused spot. Finally, the light beam is reflected by the beam splitter and imaged on the camera.
Laser confocal microscope adopts laser scanning technology. **Compared with the broad-spectrum light source of traditional microscopes, laser scanning technology can accurately locate and focus on specific areas of the sample, thereby improving the resolution and accuracy of imaging. Meanwhile, laser scanning technology can eliminate scattering and background signals in the sample, thereby improving the contrast of imaging. At the same time, the monochromaticity of lasers makes imaging clearer.
Laser confocal microscope has a large optical aperture
Laser confocal microscopy uses a highly sensitive photomultiplier tube as the detection element, which can exhibit high sensitivity to weak fluorescence signals. It can also eliminate background noise by narrowing the excitation range and using optical slicing. **Equipped with highly sensitive photodiode detectors, the laser confocal microscope can quickly and accurately detect optical signals and convert them into electrical signals.
Unlike traditional optical observation, photodiode detectors can detect individual photons, making imaging more sensitive and accurate. This high-sensitivity detector can also obtain clear images under low light intensity conditions.
Laser confocal microscope is based on the conjugate confocal principle of pinhole point light source, with nanometer level longitudinal resolution. Combined with high-speed scanning module, professional analysis software has multi area and automatic measurement functions, which can achieve fast and automated measurement, and provide a series of contour size parameters such as height, width, and angle to characterize surface quality.
