Optical: systems and elements – Methods
Patent
1990-07-31
1992-03-24
Bovernick, Rodney B.
Optical: systems and elements
Methods
359235, 359368, 359385, G02B 2106, G02B 2602
Patent
active
050993631
ABSTRACT:
A method and apparatus for scanning a specimen with an aperture of a confocal scanning microscope at speeds slower than "flicker fusion" includes an aperture disc with an optical timing sync track around its periphery with an infrared LED and photodetector for sensing the position of the sync track and, hence, the aperture disk for controlling the position and scanning speed thereof. By scanning at speeds slower than those typically used, improvement of the quality of the image is attained. An optimum scanning speed given the limits of the video camera is to scan at a speed which exposes each portion of the specimen for the full image acquisition time of the video camera. Further enhancement of the image can be attained by using an image processor with a frame buffer for storing the image as it is acquired along with adjusting the gain and black level controls of the video camera to block out backscatter off the aperture which greatly enhances the signal-to-noise ratio.
REFERENCES:
patent: 4040095 (1977-08-01), Abrams
patent: 4689491 (1987-08-01), Lindow et al.
patent: 4959552 (1990-09-01), Saffert et al.
patent: 4963724 (1990-10-01), Neumann
Bovernick Rodney B.
Phan James
Washington University
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