ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
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Lasers have been a bit of a hobby of mine over the years so I have some experience with this issue. If you want to use water vapor it has to be just that "VAPOR" not mist. Mist being made up of larger droplets will do two things you don't want: scatter the beam, either causing problems with the sensors or just weakening the beam before it gets to the sensor and secondly it will just get everything wet.
Now there are those little table top ultrasonic vapor machines but the vapor wants to hang low and therefore you will have to figure out how to get it distributed over the "strings" evenly. Any air currents are going to wisp it away and just as with the mist you still want to keep it to a minimum to lower the condensation issue. Also those units require deionized water for best results so museum staff must be informed regarding maintenance.
I have used small smoke machines but that brings up a whole 'nother set of pros and CONS. FYI: Dry ice vapor also breaks the beams up quickly.
One thing that would make the beams more visible would be to go all green. Green lasers at low powers (<5mw) are so much easier to see than red. And green LED lasers are now relatively affordable. But you know this.
Good luck.
---- "Glenn J. Hill" <[log in to unmask]> wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
>
> Hi
> I just had a couple of follow up questions to add to my first ones! :-)
>
> Do any of you use a fogger or haze machine with your lasers
> exhibits/installations ? I am wondering if it is possible to use just a
> tiny bit, to make the low powered lasers more visible ?
>
> One of the projects I am currently building, a King David laser harp for
> the Jewish Children`s Museum in NY, is planning on using a water mist, that
> will have no other ingredients in it. Has anyone else used such a system ?
>
> Thanks, Glenn
>
> ----- Original Message -----
> From: "Glenn J. Hill" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, July 02, 2009 9:19 AM
> Subject: Re: Question about laser harp exhibits , do you use yours to teach
> laser or music science?
>
>
> > ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> > Incorporated, a worldwide network of science museums and related
> > institutions.
> > *****************************************************************************
> >
> > Hello everyone ! :-)
> >
> > I was interested in how laser harp exhibits are used in various museums to
> > teach about laser and music ?
> >
> > I am a new member of ASTC , Glenn Hill, of LaserHarps.com, designing and
> > building custom laser harps for Children's Hospitals and Museums. I will
> > be showing one of my harps at the ASTC conference, along with my British
> > partner OptiMusic.
> >
> > My general question has to do with how these harps are being utilized to
> > teach science, as well as to provide entertainment ?
> >
> > I was wondering if anyone has built their own , in-house, and also if
> > anyone has one installed in such a way to teach laser science? And do you
> > also use one to teach about the mathematics of music and sound
> > frequency/intervals? Or about how midi and music computer software
> > function?
> >
> > Thanks ! Glenn
> > ***********************************************************************
> > For information about the Association of Science-Technology Centers and
> > the Informal Science Education Network please visit www.astc.org.
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> ***********************************************************************
> For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
>
> Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
>
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--
Erich Rose
Exhibit, Environmental and Industrial Design
807 The Living End
Austin, TX 78746
512-626-9930; [log in to unmask]
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit
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