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  Lab Notes Forum

Spectra Sensitivity of Different Paints Tests - My research on the different wavelength sensitivities of different paints.

Multi Color DCG Fish Tank Hologram - Here are the tests I did to make the Multi Color DCG fish tank hologram.

Brighter SBR DCG's with dual Reference Beams - Although I have not completed the testing on this procedure yet, it shows very promising results of obtaining brighter SBR holograms using a second reference beam for objects that are not white. Originally I had thought the procedure worked as tested on any object but have found recently that it works best with objects that are gray or of a color not matching the exposing wavelength thus allowing only a fraction of the light that hits the object to be reflected back to the plate..

Water, Hardener and Fixer Tests in DCG - Here I performed tests using separate fixer and hardener baths and pre-fixer/harder water soaking.

 Exposure vs wavelength Tests in DCG - Here I did some tests to compare the effect exposure times had on emulsion with different AmDi concentrations using different wavelengths.

Proving Fringe Stability with Laser off Table - With the help of a Michelson interferometer, I prove that movements prior to beam splitter does not ruin a hologram. In this 930Kb movie file, the laser was set off the table and the interferometer on the vibration isolation table. After the fringes stabilized I pressed down very hard on one end of the table that the laser was setting on and then released. I did this twice. As you can see the beam moves but the fringes remain in the relative same location.

Aluminum Reflectivity Tests - Research on the reflectivity of different Aluminum finishes.

Existing Holo's Re-sensitised and Re-Exposed to Light- I took some already processed holograms and placed them in a standard solution of AmDi. Then let them dry. The exposed them after about 15 minutes to white light. Then Reprocessed as normal (fixer, water, alcohol)