Transmittance can be improved with the addition of a second disk which contains micrometer-scale lenses in the place of pinholes. Having small pinholes with large spacing would result in higher resolution but the lowest transmittance of light through the disk. Resolution, and while having big pinhole spacing eliminates any pinholeĬross-talk, it also reduces light transmittance. Results in improved light transmittance through the disk it also reduces Pinhole spacing the image brightness, contrast and quality can be optimized, By altering the disk rotation speed, pinhole diameter and/or Pinholes in the disk are arranged so that every part of the image is scanned as The pinholes have diameter D and separation distance S, changing these values can optimize the resultant image received. Hundreds of pinholes are arranged in Archimedean spirals (left), which pass over the sample as the disk spins. Figure 2: A standard Nipkow-Petran disk used in SDCMs.
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