Table 1 Specification of scattering films used for speckle reduction.
|  | SD/MD, DA = 1° | SD/MD, DA = 6° | SD/MD, DA = 12° |
|---|---|---|---|
Particle size (μm) | 100 | 30 | 10 |
Particle surface density (for single diffuser) (#/mm2) | 13 | 42 | 128 |
Diffusion angle of each diffuser | 0.7° (MD) 0.7° (SD) | 4.2° (MD) 4.2° (SD) | 8.5° (MD) 8.5° (SD) |
Diffusion angle of the overall diffuser (SD/MD) | 1° | 6° | 12° |
Effective aperture (mm) | 5 | 5 | 5 |
