| 摘要 |
The disclosed embodiments relate to a system and method for optical calibration of a picture modulator. More specifically, there is provided a video unit (10) comprising a modulator (18) configured to modulate a projection lens assembly (16) between a first position and a second position, a photodiode assembly (22) configured to produce a first voltage corresponding to a first pixel pattern generated when the projection lens assembly (16) is in the first position and to produce a second voltage corresponding to a second pixel pattern when the projection lens assembly (16) is the second position, and a video control system (26) configured to adjust the location of the second position based on the first and second voltages.
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