Scan the pinhole on a flatbed scanner with known scale and then print the
scan and figure out the ratio of printsize of known scale to actual size and
then determine the size of a pinhole based on this conversion factor.
BTW, I have microscopes too, since I work in a life science lab.
Incidentally, as I wrote long time ago, I have been using electron
microscope grids as pinholes, you don't have to measure the size, you just
buy them and they are perfect and quality controlled; besides, they are
cheap, you get 100s in ~$10.00! :)
achal
Achal Pashine
Pediatric Immunology
Center for Clinical Sciences Research, Room 2120
269 Campus Drive
Stanford, CA 94305-5164
Tel: 1-650-498-7574
FAX: 1-650-498-6077
----- Original Message -----
From: "Jean Hanson" <jhanson@pon.net>
To: <pinhole-discussion@pinhole.com>
Sent: Sunday, July 21, 2002 3:53 PM
Subject: [pinhole-discussion] pinhole size
> I have the math on how to figure the ideal size of the pinholes but how
> do you actually measure them. Does everyone but me have a microscope, a
> micrometer? what? Jean
>
>
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Received on Tue Jul 23 19:38:08 2002
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