List of Figures

1. Formation of near field speckles
2. Measured intensity auto-correlations as a function of displacement $r$ for two sets of randomly positioned pinholes, of $140\mathrm{\mu m}$ and $300\mathrm{\mu m}$ in diameter. For both the samples, measurements at three distances are reported, together with $\left \vert g\left (r\right )\right \vert^2$, calculated from the digitized images of the two samples.
3. Optical layout for ONFS. The main transmitted beam is blocked by a stop in the focal plane. Almost all the scattered light is sent to the CCD.
4. Optical layout for ENFS. The main transmitted beam is not blocked by the stop in the focal plane. Both the scattered and the transmitted beams are sent to the CCD.
5. Optical layout for SNFS. Part of the transmitted beam is blocked by a blade in the focal plane, along with half of the scattered light. Only one half of the scattered light is sent to the CCD, along with a part of the transmitted beam.
6. Relation between the wave vector of the near field and the transferred wave vector.
7. Relation between the coordinate $q$ on a screen, in a far field experiment, and the tranferred wave vector.
8. Relative error obtained neglecting the non linearity of the ralation between the sample wave vector and the near field wave vector.
9. Example of the field generated by a particle of the colloid.
10. Example of the field generated by many particles of the colloid.
11. Description of the condition of non overlapping of the scattering regions.
12. Example of dark field image.
13. Example of Near Field Speckles image.
14. The experimental system.
15. Picture of the optical system
16. The optical system of SNFS
17. The LED laser.
18. The collimator.
19. Section of the microscope objective and the beam stop.
20. Picture of the microscope objective with the beam stop.
21. The Schlieren system.
22. Jai CV M50 camera.
23. The optical setupt for the measurement of scattering from colloids some microns large with ENFS.
24. The optical setupt for the measurement of scattering from colloids some microns large with ONFS.
25. The optical setupt for the measurement of non equilibrium fluctuations with SNFS.
26. Near field intensity of the light scattered by a colloid of $5.2\mathrm{\mu m}$.
27. Near field intensity of the light scattered by a colloid of $10.0\mathrm{\mu m}$.
28. 2-d $C_I\left(\Delta \vec{x}\right)$ for $5.2\mathrm{\mu m}$ colloid.
29. 2-d $C_I\left(\Delta \vec{x}\right)$ for $10.0\mathrm{\mu m}$ colloid.
30. 2-d $C_E\left(\Delta \vec{x}\right)$ for $5.2\mathrm{\mu m}$ colloid, not corrected.
31. 2-d $C_E\left(\Delta \vec{x}\right)$ for $10.0\mathrm{\mu m}$ colloid, not corrected.
32. 2-d $C_{\bar{I}}\left(\Delta \vec{x}\right)$ for $5.2\mathrm{\mu m}$ colloid.
33. 2-d $C_{\bar{I}}\left(\Delta \vec{x}\right)$ for $10.0\mathrm{\mu m}$ colloid.
34. 2-d $C_E\left(\Delta \vec{x}\right)$ for $5.2\mathrm{\mu m}$ colloid.
35. 2-d $C_E\left(\Delta \vec{x}\right)$ for $10.0\mathrm{\mu m}$ colloid.
36. ONFS measurement of the scattered intensity of a $5.2\mathrm{\mu m}$ colloid.
37. ONFS measurement of the scattered intensity of a $10.0\mathrm{\mu m}$ colloid.
38. ENFS background image.
39. ENFS $10.0\mathrm{\mu m}$ image.
40. ENFS $5.2\mathrm{\mu m}$ image.
41. ENFS $10.0\mathrm{\mu m}$ signal.
42. ENFS $5.2\mathrm{\mu m}$ signal.
43. ENFS measurement of the field correlation function, for a $5.2\mathrm{\mu m}$ colloid.
44. ENFS measurement of the field correlation function, for a $10.0\mathrm{\mu m}$ colloid.
45. Correlation function of the shot and read noise.
46. ENFS measurement of the scattered intensity of a $10.0\mathrm{\mu m}$ colloid.
47. ENFS measurement of the scattered intensity of a $5.2\mathrm{\mu m}$ colloid.
48. ONFS measurement of the $10.0\mathrm{\mu m}$ colloid.
49. ONFS measurement of the $5.2\mathrm{\mu m}$ colloid.
50. ONFS measurements of the two colloids.
51. ENFS measurement of the $10.0\mathrm{\mu m}$ colloid.
52. ENFS measurement of the $5.2\mathrm{\mu m}$ colloid.
53. ENFS measurements of the two colloids.
54. ONFS simulations of the two colloids.
55. ENFS simulations of the two colloids.
56. Particle sizing: sample A, $5.2\mathrm{\mu m}$ colloid
57. Particle sizing: sample B, $10.0\mathrm{\mu m}$ colloid
58. Particle sizing: solution 1/2 A + 1/2 B
59. Particle sizing: solution 1/3 A + 2/3 B
60. Particle sizing: solution 2/3 A + 1/3 B
61. Diameter distribution of two monodispese colloids measured by ENFS
62. Diameter distribution of the mixtures measured by ENFS
63. Flowing Junction Cilindrical Cell
64. Flowing Junction Cylindrical Cell.
65. Measured power spectrum of non equilibrium fluctuations.
66. Effect of the phase.
67. Effect of the phase.

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