Table 7.3 Signal-to-noise ratio and efficiency for an A-K hologram
 of a square.



 Signal-to- Medium Total
 Noise Ratio Efficiency Efficiency


Absorption
Hologram


No Pre-emphasis 66 15.6% 1.97%


High-Frequency
Emphasis 287 42.5% 9.17%


Phase-Only
Filtering 615 34.6% 7.22%



Phase
Hologram


No Pre-emphasis 66 100.0% 7.88%


High-Frequency
Emphasis 287 100.0% 36.68%


Phase-Only
Filtering 615 100.0% 28.87%