Figure 1: Grain size distribution for PFG-03C.
Figure 2: Spectral sensitivity of the PFG-03C
material.
Figure 3: Diffraction efficiency of PFG-03C. |
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.
|
Exposure |
2.5 -
3.0 mJ/cm2 |
Hardening |
Hardener,
6 min |
Wash |
Water,
1-2 min |
Development |
VRP,
4 - 5min |
Wash |
Water,
1-2 min |
Bleach |
PBU-Amidol,
5-8 min |
Wash |
Water,
1-2 min |
Stop
bath |
Stop
bath, 2 min |
Wash |
Water,
1-2 min |
Bathing |
Water
with wetting agent (Agepon), 1min |
Drying |
Slow
Air Drying |
Table 1: Recommended
processing for PFG-03C
Hardener
|
Formalin
37% |
10ml |
Potassium
Bromide |
2g |
Sodium
Carbonate |
5g |
Water |
to 1L |
VRP
Developer - Concentrated solution:
|
Sodium
Sulphite (Andydrous) |
194g |
Hydoquinone |
25g |
Potassium
Hydroxide |
22g |
Methyl
Phenidone |
1.5g |
Potassium
Bromide |
20g |
Potassium
Metaborate |
140g |
1,2,3-Benzotriazole |
0.1g |
Distilled
Water |
to 1L |
Working
solution: 1 part of developer + 6 parts water.
|
PBU-Amidol
Bleach
|
Potassium
Persulphate |
10.0g |
Citric
Acid |
50.0g |
Cupric
Bromide |
1.0g |
Potassium
Bromide |
20.0g |
Amidol |
1.0g |
Water |
to 1.0L |
Stop
Bath |
Acetic
Acid |
20g |
Water |
to 1.0L |
Table 5: Recommended
Chemistry for PFG-03C.
|