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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt
Telefon: +49 6151 4259 78
Telefax: +49 6151 4259 88 
E- mail: info [at] topag.de 

PFG-04, dichromatic

798
PFG-04, dichromatic holography plates

GruenBlau

The dichromated gelatin holographic plates are designed for phase reflection holograms with blue or green laser. The spectral sensitivity range up covers 514 nm, 457 nm, 488 nm and 514 nm). The emulsion thickness is 16-17 um. The sensitivity reaches 100mJ/cm2 in the blue spectrum range and 250mJ/cm2 in the green. Due to its grainless structure, this emulsion has high resolving power and a diffraction efficiency of >75%.

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  • Description
Tab 1

This material is designed for the recording of reflection Denisyuk-type holograms using CW laser radiation (488nm, 514nm -Argon laser). The material spectral sensitivity curve is shown in figure1. The sensitivity reaches 100mJ/cm2 in the blue spectrum range and 250mJ/cm2 in the green. Due to its grainless structure, this material has very high resolving power and a diffraction efficiency of >75% (figure2), but has the lowest sensitivity from all holography emulsions offered by Geola's distribution network.

The recommended processing technique of the exposed hologram consists of the following operations:

1) Thermal Hardening after exposure (100OC) - Depending on the layer freshness. See figure3.

2) Cooling to Room temperature.

3) Bathing in running filtered water - 3mins.

4) Bathing in 50% Isopropyl Alcohol solution for 2 - 3 mins.

5) Bathing in 75% Isopropyl Alcohol solution for 2 - 3 mins.

6) Bathing in 100% Isopropyl Alcohol solution for 2 - 3 mins.

7) Drying in a desiccator. (100oC) for 60 mins.

8) Emulsion layer preservation using optical anhydrous adhesive and protective glass.

Note that the processing solution temperatures must not exceed 20°C for fresh layers. If holograms appear "milky" in colour then the processing solution temperature should be decreased or the thermal hardening period should be prolonged. The material shelf life is 12 months (average observed period).

Graphen PFG04

 

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