Holography materials
Ultra fine grain emulsion (panchromatic)
This material is designed for the production of full-colour reflection holograms using CW laser radiation in the blue (457nm - Argon laser), green (514nm - Argon laser) and red (633nm -HeNe laser). This is an ultra fine grain emulsion (see grain distribution curve on Fig.1). Due to the very small grain size emulsion is also less sensitive than fine grain emulsions, has shorte life time and the emulsion processing is more difficult.
A spectral sensitivity curve of the PFG-03C material is shown in Fig.2. Diffraction efficiency versus exposure is shown in Fig.3. The maximum diffraction efficiency in the blue region is >25% and in the green and red regions >45%.
Typical sensitivity values for PFG-03C are 2mJ/cm2 and 3mJ/cm2 for the blue and red/green regions respectively. Recommended processing is given in table1, recommended chemistry - in table2.
Figure 1-3
Recommended processing for PFG-03C
| Procedure | CW exposure | Pulsed exposure | |
|---|---|---|---|
| Exposure: | 1.5 - 2.0 mJ/cm2 | 120-550microJ/cm2 | |
| Development/Hardening | SM-6 + Formaldehyde 37% (10 ml to 1 liter of developer) , 2 min. | ||
| Wash | Water, 2 min. | ||
| Bleach | PBU-Amidol 5 min. | ||
| Wash | Water 5 min. | ||
| Drying in Alcohol bath | 50% Isoprophyl alcohol 4min | ||
| Drying | Slow Air | ||
Recommended Chemistry for PFG-03C
| SM-6 Developer | PBU-Amidol Bleach | |||
|---|---|---|---|---|
| Sodium Hydroxide | 12.0g | Potassium Persulphate | 10.0g | |
| Methyl Phenidone | 6.0g | Citric Acid | 50.0g | |
| Ascorbic Acid | 18g | Cupric Bromide | 1.0g | |
| Sodium Phosphate (dibasic) | 28.4g | Potassium Bromide | 20.0g | |
| if 12H2O | 71.6g | Amidol | 1.0g | |
| Water | to 1.0L | Water | to 1.0L | |
Chemical Formulas
| Title | Chemical | Formula |
|---|---|---|
| SM-6 | Sodium Hydroxide | NaOH |
| Phenidone | C6H5-C3H5N2O | |
| Ascorbic Acid | CH2OHCHOH(CHCOH:COHCOO) | |
| Sodium Phosphate (dibasic) | Na2HPO4 | |
| PBU-Amidol | Potassium Persulphate | K2S2O8 |
| Citric Acid | HOC(COOH)(CH2COOH)2 | |
| Cupric Bromide | CuBr2 | |
| Potassium Bromide | KBr | |
| Amidol | (NH2)2C6H3OH-2HCl |