Optical device

摘要

A liquid crystal panel (441) as an optical modulator includes: a driving board (441C) having a plurality of signal lines, a plurality of switching elements connected to the signal lines and a plurality of picture electrodes connected to the switching elements; an opposing board (441D) being opposed to the driving board (441C) and having common electrodes; and a flexible printed board (441 E) electrically connected with the plurality of signal lines and the common electrodes, the flexible printed board extended from between the driving board (441C) and the opposing board (441D). The flexible printed board (44 1 E) is provided with an insertion hole (441E1) for a fluid circulator in which a cooling fluid is circulated to be inserted. <IMAGE>