Research on Encryption and Anti-Counterfeiting by Spectrum Image Method in Holographic Printing(V)

Chapter 4 Experimental Design and Discussion

4.1 Experimental apparatus and equipment 1. Darkroom: Most of the experiments were conducted under darkroom conditions.
2. Working platform: shockproof platform, a key problem of holographic experiments is to solve the effect of vibration on interference fringes. If the reference light and object light intersect with the angle θ, the distance between the central part of the pattern and the stripe is For laser wavelengths. If vibration is generated with d/2 amplitude during the exposure, interference fringe generation is significantly affected, and therefore a shockproof table composed of a shock absorber and a fixed support structure is necessary.
3, optical components:
1He-Ne laser, used to generate a coherent light source.
2 full mirror, used to change the direction of the light path.
3 beam splitters are used to separate the light path to form a coherent light beam.
4 beam expander, used to diffuse the beam.
5 Attenuation sheet, used to attenuate the beam, so that the light intensity requirements.
6 Lenses used to generate parallel beams and Fourier transforms.
7 dry version, used to record interference fringes, requires high resolution.
8-pin filter, limit light source, constrain beam size.
9 slits, limit the light field.
10 Power supply and photocurrent detector for checking light intensity ratio.
4, darkroom equipment and equipment 1 models of safety lights (matching).
2 Developer: Water, Metol, anhydrous sodium sulfate, hydroquinone, anhydrous sodium carbonate, potassium bromide.
Table 4.1 D19 Developer Formula

3 stop the liquid: acetic acid, water.
Table 4.2 Stop Liquid Formulation

4 Fixing solution: sodium thiosulfate, anhydrous sodium sulfite, glacial acetic acid, boric acid, potassium hydrazine, water.
Table 4.3 F-5 Fixer Formula

5 Bleach: Potassium bromide, potassium ferricyanide, water.
Table 4.4 Bleach formulations

61000ml measuring cup, 10ml measuring Cylinder, stirring rod.
7 balances, weights, photographers.
8 thermometers, heaters.
9 timers.
10 The subject and the encryption are marked in dark. (To be continued)