PSN-L Email List Message

Subject: RE: Optical position indicator idea
From: "Coleman, Allan" allan.coleman@............
Date: Tue, 17 Aug 2004 07:39:46 -0700


Chris,
=20
Have you seen the development work done by Scripps, regarding their =
"experiments with an optical seismometer", based on a fringe resolver =
using fiber optic interferometry? The design is beyond the capability of =
most amateurs, but it is an interesting read. You can see details of =
their design at:
=20
http://gravity.ucsd.edu/research/OFSEIS/opt_seis.html
=20
Regards,
=20
Allan Coleman

-----Original Message-----
From: psn-l-request@.............. =
[mailto:psn-l-request@................. Behalf Of ChrisAtUpw@.......
Sent: Monday, August 16, 2004 6:53 PM
To: psn-l@..............
Subject: Re: Optical position indicator idea



<<<<<>>>>>=20

 If you try to use interference fringe methods, your resolution will be =
limited, commonly to a fraction of a micron.    =20

      Regards,=20

      Chris Chapman=20








Chris,
 
Have=20 you seen the development work done by Scripps, regarding = their "experiments with an optical = seismometer", based on a fringe resolver using fiber optic=20 interferometry? The design is beyond the capability of = most=20 amateurs, but it is an interesting read. You can see details of their = design=20 at:
 
http://gra= vity.ucsd.edu/research/OFSEIS/opt_seis.html
 
Regards,
 
Allan=20 Coleman
-----Original Message-----
From: = psn-l-request@................. [mailto:psn-l-request@...............On Behalf Of=20 ChrisAtUpw@.......
Sent: Monday, August 16, 2004 6:53=20 PM
To: psn-l@..............
Subject: Re: Optical = position=20 indicator idea

<<<<<<SNIP>>>>>&g= t; 
 If you try to use interference = fringe=20 methods, your resolution will be limited, commonly to a fraction of a = micron.=20     =

      Regards,=20

      Chris=20 Chapman
=20

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