Re: effect of enlarging the hole in pinhole camera

From	Martin Brown <\|\|\|newspam\|\|\|@nezumi.demon.co.uk>
Newsgroups	sci.image.processing
Subject	Re: effect of enlarging the hole in pinhole camera
Date	2016-10-04 15:08 +0100
Organization	Aioe.org NNTP Server
Message-ID	<nt0d5a$108b$1@gioia.aioe.org> (permalink)
References	<325DC89D.4A26@mp.cs.niu.edu> <037a8fff-9bb8-4860-8736-48c56aecb6c7@googlegroups.com>

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On 25/09/2016 05:37, awholeblessed@gmail.com wrote:

> fuzzier is the answer 100% sure

Depends fundamentally on the distance from the screen to the pinhole and 
the size of the original pinhole to begin with.

Optimum sharpness is obtained about when the diffraction pattern of the 
aperture matches the spot size from classical geometric ray tracing at 
the plane of the screen.

The other more exotic form of pinhole enlargement leads to coded 
aperture masks which is an altogether more interesting subject.

Bigger pinhole is brighter so you have to trade one against the other.

Regards,
Martin Brown

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effect of enlarging the hole in pinhole camera awholeblessed@gmail.com - 2016-09-24 21:37 -0700
  Re: effect of enlarging the hole in pinhole camera gr <greif1-nospamhere@rochester.rr.com> - 2016-09-26 22:21 -0400
  Re: effect of enlarging the hole in pinhole camera Martin Brown <|||newspam|||@nezumi.demon.co.uk> - 2016-10-04 15:08 +0100

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