Where is the best place to buy materials

On: Sun, Jul 22, 01 11:59:34 PM

Eric E. wrote:

RESPONSES

Colin Kaminski - Mon, Jul 23, 01 11:57:50 PM

I like integraf at: http://members.aol.com/integraf/catalog.html If you are looking for larger quantities try: http://www.laserreflections.com/film.html May your table be stable and your holograms bright. 64.167.151.230

Michael S - Wed, Jul 25, 01 02:53:17 AM

I'm new to holography but here are a few sites I've found thay may be usefull to you and other beginning holographers. As near as I can tell you can get GP-2 as a one step developer for PFG-03 film instead of the multi-step developer such as JD-2 or JD-3. I'm not sure if it works only on that particular film or others as well. For developing chemicals try http://www.photoformulary.com/toc.htm or as mentioned above http://members.aol.com/integraf/catalog.html#equipment They also have film and other supplies for begining holographers ( Infiniter 200-650NM Black ) The laser recommended in the Shoebox book cam be found at http://www.quarton.com Everyone seems to be recommending edmundscientific.com for optics but you really need to know the product number as far as I can tell as they don't have a seperate listing for holography optics and I have been unable to find anything I need there. I'm sure if you gave them a call they would be able to steer you in the right direction. This might not be relative but you can get small (apx. 2"x2") front surface mirrors out of old Polaroid cameras found for around $4 at second hand stores such as Goodwill, St. Vincent de Pauls, etc. If you write an email to sales@geola.com they will send you holographic films samples upon request along with a small catalog with instructions and a list of distributors around the world. Three of which are in the U.S.A. If anyone knows of a good cheap place to find green safe lights please post the address. Hope this helps. Thanks and good luck all. 12.18.158.25

John K - Wed, Jul 25, 01 07:22:39 PM

I use stage lighting filter and the older large christmas light bulbs for my dark room light. You can get the filter material at any music instrument store. It consists of thin plastic sheet. There are several brands of filters, roscolux comes to mind. Look at rosco's web sit www.rosco.com ,go to products, roscolux, and take a look at green filters and use thier spectrial charts To find a filter that blocks out the light that your film is sensitive to. You can also put two different colors together to get the right filter effect. #90 dark yellow green looks like a good choice. 209.180.9.150

Michael S - Thu, Jul 26, 01 06:11:42 PM

Will I need both the #90 Green and the #90 Yellow? 12.18.158.25

John K - Thu, Jul 26, 01 10:57:46 PM

#90 (dark yellow green) is one filter. I used that filter as an example of that looks to be a good choice for red sensitive holography film. That film will typically have a peak sensitivy around 633nm, and become less senstive as you get away from 633nm. but some types of film will also get more senstive as you get towards the blue and uv part of the spectrum. So,you need to block blue and red light. Go to www.roscolux then click on products, then click color filters, then roscolux. There you can see the different filters and each of their spectrial charts. There are other companies that may be cheaper. If you use two filters you can get a better match to the film your using although it might be over kill. Also take a look at film companies site, they should have a spectrial chart of the film you want to use, so you can get an idea of what light frequncies you want to block. It needen't be exact, I used two filters that I had laying around, and checked them by looking at a red light through them, no red light showed through so I used them. 209.180.9.196

Colin Kaminski - Fri, Jul 27, 01 12:53:01 PM

I am a stage lighting designer and have a very large inventory of gels. There are many that work for the pfg-01 I use but I found the cheapest and easiest way to get safe light is a "Lime Light" I got 3 for $9 at Home Depot. They are .3 or .5 watt phosphorescent lights and have a very narrow band width. I placed one under my table and leave it on 24/7. If you are looking for more gel numbers look in the archives for safe light. We listed a few there. 63.193.192.12

Eric E. - Sat, Jul 28, 01 01:37:03 AM
About Edmund Scientifics online- you can order their catalog (the Optics one!) and it has a lot of very useful info in it. I often use it for refrence/pricing on optics. You can order one for free at their website. http://www.edmundoptics.com go to their website (click here) go to the catalog request form (click here)(click here) https://ssl2.jersey.net/edmundoptics/CatalogRequest/index.cf m?CFID=3448081&CFTOKEN=69726423 65.10.251.214

Colin - Sat, Jul 28, 01 01:26:37 PM

I just looked at my safe light. It is a Limelite Model# 11100 made by Ausin Innovations, Inc. and is .03W at 115V. 64.167.149.38

John Klayer - Sat, Jul 28, 01 07:32:48 PM

Yes, I use Limelights too, I have 8 of them on the ceiling above my table - all covered with green filters. These Limelights are not narrow band green. Put a red filter over one - see the red light? So does your holographic film. 216.46.36.173

Colin - Sun, Jul 29, 01 02:19:47 PM

Interesting. I remember testing my Lime Light when I got it. So I just went into the shop and tested it again. You are right a little light does leak through a GamColor #250 which should be flat below 600nm. A solar cell hooked up to a ohm meter reads 260mv with no gell and 3mv with the #250 in place. Since I only use one and place it under the table (no direct path from the light to the film) I should be OK. I have left film on the table for 30 minutes allowing things to settle and not noticed any fogging problems. It sounds like you like to use lots of safe light. I pretty much work in the dark. I guess that comes from my astronomy days. Speaking of my light meter I have been getting inconsistant results with it. I will change setups and check the reference and object readings adjust my exposure and not get good results until I adjust my exposure time by trial and error. What light meter do you use? 64.167.149.38

david warren - Thu, Aug 23, 01 01:47:41 AM

I've been into making large scale holograms...up to 15metres for the past sixteen years. Here's where you get the best optics for next to nothing...old photocopy machines; they are full of first surface mirrors that are optically flat, some round, some square, some rectangular, and if you talk nicely to the recycling centre folk these items might cost you nothing compared to the scientific establishments that would like nothing better than to see you pay through the nose. Go to a shop that recycles/repairs microscopes or old scientific equipment, you'll get your lenses for next to nothing there as well. I'm about to get a 35mW diode laser to make a 7 metre hologram. Size isn't everything when it comes to laser output powers, it's how you use it. Good work Frank and Sam with the laser diodes, more unsung heroes of holography! 203.43.164.14

Michael S - Thu, Aug 23, 01 03:10:10 AM

Hey David have you been able to get anything bigger than a 2"x12" mirror out of old copy machines? I was able to find on average 3 to 5 of that size per copy machine. I had hoped to find 4"x5" or even 8"x10" mirrors in them. 12.18.158.25

david warren - Thu, Aug 30, 01 01:33:09 AM

Another place for optically flat front surface mirrors, some up to 4"x6", dichroic mirror, and red filters suitable as safelights when working with the green spectrum are old supermarket scanners. Usually the lasers are no longer working which is why they are thrown on the heap (not worth repairing, especially with the advent of the cheaper diode versions). My spatial filter is a piece of thin copper foil and a pinhole made by a needle. This is glued to a rectangular magnet with a hole drilled in it for the filtered expanding beam to exit. The magnet is then hot glued on a stand that I can adjust up an down and forwards and backwards. It gives me as clean a beam as the $600 units I used at the lab where I did my Masters degree (1984-5). That was when I got the bug for doing big holograms producing a couple of 1x1,5 metre glass plate holograms and one on film 1x3metres. I'm telling you this not to brag but to let you know that I still make big holograms and it can be done without the "best equipment in the world". I buy nothing, I repeat, I buy nothing that I have to because buying large quantities of film to make big holograms is expensive enough. And I don't have a big studio. I'm about to make a 7metre and a 10metre hologram on a table that is in my bedroom which has acrpet over a concrete floor. The "table" is a chest of drawers with a flat piece of wood on top, two bycicle tubes then another larger flat piece of wood and twelve flat concrete pavers. The optical train sits on this. Have faith yea of little cash! 203.43.164.14

Colin - Thu, Aug 30, 01 03:04:25 PM

I just recieved some 3 x 9 inch mirrors that are optically flat for $5 from: http://www.surplusshack.com They are a little difficult to mount but are new and in the original sealed packaging. 64.167.151.3

Lenny - Sun, Aug 25, 02 09:35:13 PM

I am a young student trying to create a hologram for the first time. I have tried to find some 4x5 inch film in my price range but have yet to do it. If you have some suggestions i would appreciate your help. 12.250.220.108

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