4 ms·

Why not use an endless tape with holes instead of a disk? you could even add some more holes to generate a clock, line-sync and page-sync. Or a rotating cylinde

• Someone 6y ago
  I guess a tape would be too light to maintain constant speed, certainly at the time. I notice current hardware still uses disks, so cylinders probably have disadvantages, too (possibly that they have to be either enormous or have a strongly curved surface, but I don’t see how the curved surface would be bad) And yes, there’s current hardware (for the recording side). https://svi.nl/Spinning-Disk-Microscope https://svi.nl/Spinning-Disk-Microscope: “A Nipkow spinning disk microscope is one type of Fluorescence Microscope. A Nipkow disk is a spinning disk with a series of equally distanced circular holes of equal diameter drilled in it. It was invented by Paul Nipkow in 1885. Applied to a Fluorescence Microscope, it allows the sample to be scanned with an array of light points transmitted through these holes, participating in some of the advantages of a Confocal Microscope. Spinning disk microscopes are very good for living samples because they are fast and have relatively low phototoxicity. For fixed samples, a point-scanning Confocal Microscope is, in some cases, a better solution. A Yokogawa Disk is a Nipkow disk with an array of microlenses in (or right after) the holes used in many commercial spinning disk microscopes.” One manufacturer is https://www.suss-microoptics.com/en/products https://www.suss-microoptics.com/en/products
  • user-the-name 6y ago
    It is tricky to make optics that focus an image onto a curved surface like that.