Re: [ATM] phase contrast testing with a film filter line,was: Zernike (or Lyot) phase contrast tests (fwd)

[u.suessenberger@t-online.de ("Uwe Süßenberger")]

Hello Nils Olof,

From: "Nils Olof Carlin" <nilsolof.carlin@telia.com>

> but as I have understood,
Wolfgang uses the film to make the "phase plate" that Herbert Highstone
makes from sooted glass - HH uses the film to record his image instead.

yes, this actually seems to be the point (film as phase plate):
http://www.astrosurf.com/tests/contrast/contrast.htm#haut
esp.
http://www.astrosurf.com/tests/images/contrast/principe.jpg
and
http://www.astrosurf.com/tests/images/contrast/lame.jpg

> Could Wolfgang's poor success with sharp lines be explained by too opaque
lines?

I forward this to Wolfgang.

Regards: Uwe
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