Confocal optical scanner

• Main Author: XIE YUNYAN
• Format: Patent
• Language: English
• Published: 10.02.2016
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TESTING

The invention relates to a confocal optical scanner which uses adjustable incidence angle annular illumination. The confocal optical scanner comprises a light source, a first collimation lens, an excitation filter, a long focal length annular lens, a short focal length annular lens, an inner conical reflector, an outer conical mirror, a convergent lens, a second collimation lens, a lighting pinhole, a dichroic light splitter, an X-Y scanning galvanometer, a scanning lens, an emission filter, an imaging lens, an imaging pinhole and a detector. The optical axes and the focuses of two annular lenses coincide. The inner conical reflector and the outer conical mirror share the same cone angle and can mutually move along the optical axis to change the incident angle of illumination. According to the confocal optical scanner, the illumination of a focal plane sample located on an objective lens of a microscope is not changed; the axial illumination of a non-focal plane sample located on the objective lens of the microscope can be avoided or reduced; interference from the non-focal plane sample is reduced; and the imaging axial resolution is improved.