Difference between revisions of "Experimenter's Corner"

From HoloWiki - A Holography FAQ
Jump to: navigation, search
(Created page with "Holography has a wealth of possibilities for the amateur and professional holographer, alike. == Ferric Ammonium Oxalate == {| |- | Ferric ammonium oxalate (FAO) and possibl...")
 
m
Line 5: Line 5:
 
{|
 
{|
 
|-
 
|-
|
+
| [[File:FAO_TestGrating.JPG|400px|right]][[File:FAO_TestFigure.jpg|400px|right]]
 
Ferric ammonium oxalate (FAO) and possibly ferric ammonium citrate (FAC) have possibilities as a substitute for ammonium or potassium dichromate in gelatin.  Experimentation is chronicled in two Holoforum threads:
 
Ferric ammonium oxalate (FAO) and possibly ferric ammonium citrate (FAC) have possibilities as a substitute for ammonium or potassium dichromate in gelatin.  Experimentation is chronicled in two Holoforum threads:
 
http://holoforum.org/forum/viewtopic.php?f=7&t=440 and http://holoforum.org/forum/viewtopic.php?f=7&t=497 .
 
http://holoforum.org/forum/viewtopic.php?f=7&t=440 and http://holoforum.org/forum/viewtopic.php?f=7&t=497 .
Line 23: Line 23:
  
 
The second picture is a single-beam reflection hologram take with a 25 minute exposure.
 
The second picture is a single-beam reflection hologram take with a 25 minute exposure.
| [[File:FAO_TestGrating.JPG|400px|right]][[File:FAO_TestFigure.jpg|400px|right]]
 
 
|}
 
|}

Revision as of 09:42, 12 May 2013

Holography has a wealth of possibilities for the amateur and professional holographer, alike.

Ferric Ammonium Oxalate

FAO TestGrating.JPG
FAO TestFigure.jpg

Ferric ammonium oxalate (FAO) and possibly ferric ammonium citrate (FAC) have possibilities as a substitute for ammonium or potassium dichromate in gelatin. Experimentation is chronicled in two Holoforum threads: http://holoforum.org/forum/viewtopic.php?f=7&t=440 and http://holoforum.org/forum/viewtopic.php?f=7&t=497 .

Test plates were fabricated using:

  • 30 g gelatin, 250-bloom pork
  • 6 g ferric ammonium oxalate
  • 300 ml water

The coating thickness was estimated to be 7 to 9 microns. Plates were three days after coating. Geometry was a two-beam transmission grating at zero degrees and 24 degrees (~900 l/mm) at 457 nm from a solid state Melles Griot laser. The pictured plate was a 60 mJ exposure (mJ/cm^2?).

Processing was as follows:

  • 10 seconds in 1% Hydrogen Peroxide
  • 2 minutes water @ ~ 18 deg C
  • dehydration with IPA as per DCG processing

The second picture is a single-beam reflection hologram take with a 25 minute exposure.