Table 1: Parameters of gray scale microlens array.

No.DiameterHeight of microlens array (the order is from close to far of the light source)

20-A μm5 μm, 15 μm, 25 μm, 35 μm
20-B μm35 μm, 25 μm, 15 μm, 5 μm
40-A μm5 μm, 15 μm, 25 μm, 35 μm
40-B μm35 μm, 25 μm, 15 μm, 5 μm