The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: John Woodgate
Subject: Re: Make infrared goggles inexpensively (like $10!!!)
Date: Wed, 18 Sep 2002 22:11:03 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Wed, 18 Sep 2002 21:40:10 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Joseph Legris
wrote (in <3D88D00E.5EAC32F3@xympatico.ca>)
about 'Make infrared goggles inexpensively (like $10!!!)', on Wed, 18
>"William J. Beaty" wrote:
>> For this application (viewing the outside world,) it might be
>> better to base our definition upon the eye's dynamic range in bright
>> sunlight (obviously not including the extra range which comes from
>> dark adaptation.) Does anyone know this value?
>I recall reading somewhere that the range of optical stimuli perceptible
>to the human eye spans roughly 9 orders of magnitude!
It seems likely. The ear can cope with around 6 orders of magnitude at
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
Interested in professional sound reinforcement and distribution? Then go to
PLEASE do NOT copy news posts to me by E-MAIL!
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup