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Hello,
There is another interesting part of the story which is this paper from
1982:
I. J. Cox, C. J. R. Sheppard, and T. Wilson, "Improvement in resolution by
nearly confocal microscopy," Appl. Opt. *21*, 778-781 (1982)

Abstract: In a conventional confocal microscope the resolution is improved
over that attainable in a conventional instrument. A further improvement in
resolution is produced when the detector pinhole is offset resulting in
nearly confocal operation. For the case where the pinhole is placed over
the first dark ring in the Airy disk in the detector plane, dark-field
conditions are produced by a very simple method.

best wishes,
Guy Hagen




On Sun, May 28, 2023 at 7:57 AM Khoroshyy Petro <[log in to unmask]> wrote:

> *****
> To join or leave the confocal microscopy listserv or to change your email
> address, go to:
> https://lists.umn.edu/cgi-bin/wa?SUBED1=confocalmicroscopy&A=1
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Hi, list.
> I was looking back into the "invention" of Airyscan.
> It looks like this article was the closest to it:
> Sánchez-Ortiga, Emilio, Colin Sheppard JR, Genaro Saavedra, Manuel
> Martínez-Corral, Ana Doblas, and Arnau Calatayud. 2012. “Subtractive
> Imaging in Confocal Scanning Microscopy Using a CCD Camera as a
> Detector.” *Optics
> Letters* 37 (7): 1280–82.
> Also, this article mentions a microscope with two pinholes.
> Sheppard, C. J. R., & Cogswell, C. J. (1990). Confocal Microscopy with
> Detector Arrays. Journal of Modern Optics, 37(2), 267–279.
> Does anybody know something earlier or later?
>
> Thanks.
> Petro.
>
>
> --
> ______________________________
> Petro Khoroshyy
>