Table 1.

Percentage of Incident Light Power Concentrated in the Central Peak of the Diffraction Pattern in the Focus Plane Versus the Dot Material Transparency and the Proportion of Absent Dots

Dot Transparency	Absent dots
	1/4	1/9	1/16	1/25	none
100% (no dot)	100%
95%	98.1	97.7	97.6	97.6	97.5
75%	90.8	89.2	88.6	88.3	87.8
50%	82.2	79.1	78.0	77.5	76.6
25%	73.9	69.5	68.0	67.3	66.1
0%	66.0	60.5	58.6	57.8	56.3
0% - duty cycle: 0.4			76.6