If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #60240
Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304
Hello friends of optics
In continuation of the experiment "light velocity measurement with red laser pulses" I would like to perform measurements of the index of refractin of liquids (E.g. water, solutions, organic solvents) and solids (e.g., glass, Plexiglass) with differently colored lasers (determination of the dispersion) again over run-time determinations of laser pulses. For this I need about 1 m long glass tubes, with a diameter of about 1 cm, but with plane-parallel windows of good optical quality. There is something of Leybold with a meter length and 7 cm diameter for 570 Euro plus VAT, but with a filling capacity of 4 liters, which goes with water, but otherwise not.
Does anyone know maybe a reference source? Also glass rods, etc. with planar parallel end faces, flatness at least lambda/10 I'm still searching.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
I have bought SIMAX borosilicate tubing The largest bore that I have so far is 9mm i.d. x 16mm o.d. 1.5m long , looking down the bore, I believe that it is straight enough for your purposes. The glass comes in 1.5m standard lengths, shorter = more expensive due to cost of cutting.
Microscope cover slips (e.g. ) are pretty thin and flat, do you really need lambda/10 ? the glass screen protectors for smartphones are also very thin and flat - but I doubt they can be cut without difficulty. Actual lambda/10 :
Epoxy resin should be good enough to seal the glass flats to the tube, the epoxy should be elestic enough to handle the slight thermal expansion differences, but you may want to use soda-glass tubing if you think that you will use a wide temperature range or bore size. Ideally a quartz tube and flats will give minimal thermal expansion.
I have a 160mm i.d. 5.33mm wall thickness 1.2m long glass (probably soda-glass but not sure) tube that I'd sell for £15 + p&p if you want but I think that you should use a smaller bore.
If you seal the ends (non-trivial if optical alignment is required) how will you change fluids ?
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
determination of index of refraction
