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Laser scanning confocal microscopes

Laser Scanning Microscopes

Unlike conventional optical microscopes, these systems are mainly used for 3D surface analysis and characterization. By incorporating two light sources, a white light for gathering color and a laser source for scanning the surface of an object and collecting detailed height information. As the microscope observes a surface, the laser is scanned in the XYZ directions to collect data throughout the entirety of specified range. The result is a high-resolution, large depth-of-field, color image with nanometer-level height resolution for accurate profile and roughness measurements. This equipment is able to combine a lot of the functionality of an optical microscope, scanning electron microscope, and surface roughness gauge, but still maintain the ease-of-use of an optical microscope.

FUNCTION DIAGRAM OF THE MEASUREMENT PRINCIPLE. 1. The laser scans in the X and Y directions. 2. The objective lens moves in the Z direction and the laser scans in the X and Y directions again. 3. This scanning procedure is repeated until the end of the measurement depth is reached. 4. The measurement is then complete.