Grayscale patterns from binary spatial light modulators

摘要

Brightness-by-column grayscale and spatial Σ-Δ modulation grayscale allow grayscale patterns to be produced using a binary spatial light modulator as fast as the bright/dark switching speed.

主权项

1. A method for producing a grayscale image comprising:
providing a digital spatial light modulator having a two-dimensional array of modulator elements each of which may be set in a bright state or a dark state, the elements arranged in columns; setting columns of elements in the array in bright or dark states according to spatial Σ-Δ modulation of a desired grayscale pattern; and, imaging the array with a lens and an aperture to produce the desired pattern, the aperture removing high spatial-frequency components from the pattern.