Abstract
It is shown that twisted nematic liquid-crystal spatial light modulators behave as phase-only modulators when operated below the conventional optical threshold. Thus such devices, when operated in a reflection mode, behave as spatial amplitude modulators when used between crossed polarizers above the optical threshold; they behave as phase modulators when used between parallel polarizers and operated below that threshold.
| Original language | English |
|---|---|
| Pages (from-to) | 251-253 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 13 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1988 |