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what is a diascope?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/06/2009 at 09:06
pickles View Drop Down
Optics GrassHopper
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I'm new to optics so bear with me, but what is a diascope?

I've looked everywhere for some form of definition and finally had to register here just to ask since I can't find any info aside from product descriptions, none of which say what the heck makes a diascope a diascope.

Thanks for your help!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/06/2009 at 09:14
JGRaider View Drop Down
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A diascope Is Zeiss' brand of spotting scopes.  Search on this site for more info.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/06/2009 at 09:38
pickles View Drop Down
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I have searched on this site and nobody says what one is. I assume Zeiss is calling them diascopes for a reason, right?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/06/2009 at 11:29
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Try this link, or copy and paste:

http://swfa.com/Zeiss-Spotting-Scopes-C501.aspx

Edited by JGRaider - November/06/2009 at 11:30
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/06/2009 at 12:20
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Because they were designed by Portuguese optics engineer Jose Dias to be used during the day (dia) and were based on research performed on dialysis patients. Bandito
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/06/2009 at 13:22
Terry Lamb View Drop Down
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And, furthering research done by JonoMT above, I found the following quote from a patent which definitely clears it up for me:
   

"diascope switch means operably connected with an output of said comparison amplifier means for selectively by-passing said iris driving voltage to ground, for disabling said iris driving circuit."

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/21/2009 at 01:52
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My simple thoughts is that it is maybe a Dia(lyt roof prism) scope
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/11/2011 at 12:24
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A Diascope is an Optical Lantern.  The instrument is described in Intermediate Physics by C J Smith, Edward Arnold & Co, London 1932 and many reprints.

The text describes the optical construction of this instrument and its close cousin the Epidiascope.  Both of these insruments are now museum pieces, and the former term has been adopted for a particular kind of telescope.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/13/2011 at 22:35
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Whacko
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