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Eversmart supreme halo problem

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  • Eversmart supreme halo problem

    We have Creo-Scitex Supereme scanner for two years .
    Scan-resoluton in reflective mode and transparency mode seemed to be excellent.

    But recently I noticed extreme halo in transparency mode.

    White fields bleed over into the black areas for up to an inch or so. Also, I noticed that a black field spanning many inches had a sinusoidal intensity fluctuation. The black went darker and lighter along the scan direction.

    Any suggestion will be gtreatly appreciated.

  • #2
    Re: Eversmart supreme halo problem

    Sounds like the optics are dirty. You could try minimizing this by masking off the areas around the transparency, but if you can have the the optics cleaned, it will likely reduce the problem.

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    • #3
      Re: Eversmart supreme halo problem

      > {quote:title=gutten-berg wrote:}{quote}
      > We have Creo-Scitex Supereme scanner for two years .
      > Scan-resoluton in reflective mode and transparency mode seemed to be excellent.
      >
      > But recently I noticed extreme halo in transparency mode.

      The Eversmart scanners have a big problem with flare. Mask the TXs with some exposed film.

      rich

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      • #4
        Re: Eversmart supreme halo problem

        >Mask the TXs with some exposed film.

        assuming you still have film. Rich is so "old school". I cut CTP plates with tin snips to mask off txs now.

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        • #5
          Re: Eversmart supreme halo problem

          Hi,

          <<<<<<<<<<<<<<The Eversmart scanners have a big problem with flare

          Why this problem ??

          Thanks
          Philippe

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          • #6
            Re: Eversmart supreme halo problem

            We treat our exposed film with kid gloves right now. Knowing that we can't get any more. We still use if for our reflective drum scanning.....

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            • #7
              Re: Eversmart supreme halo problem

              The ‘halo effect’ is a well-documented and common problem of Eversmart Supreme Scanner - that is due to the cooling system of the CCD head.

              The only cure for this problem is a proper cleaning of the protective glass and outer surface of the head with a special cleaning solution.

              I performed this procedure on the quite a few CCD heads, and I can do this for your company if you are willing to send over the CCD head to my lab in Boston .

              you can reach me at: vovkan28@yahoo.com

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