| 摘要 |
A laser projection apparatus including a liquid crystal optical element of a transparent and scattering type having a liquid crystal and solidified matrix composite. A laser beam having a wavelength of approximately 1 mu m emitted from a laser beam source is supplied to the liquid crystal optical element, and a projection optical system operates for reduction-projection a laser beam emitted from the liquid crystal optical element onto an object. Further, with respect to a certain pixel of the liquid crystal optical element, there are overlapped portions between lead lines of a common electrode and lead lines of a segment electrode in the vicinity of the pixel, a width W1( mu m) of the overlapped portion, a reduction projection ratio (projection by 1/N) and a gap d( mu m) between electrodes of the liquid crystal optical element satisfy the relation, W1+d<10xN. Further, the refractive index anisotropy DELTA n of the employed liquid crystal is 0.18 or higher, the viscosity eta (cSt) thereof is equal to or less than 60, the refractive index anistropy DELTA n, a means particle diameter R( mu m) of liquid crystal which is dispersed and held in a solidified matrix and the gap d( mu m) between electrodes satisfy the following relationships, (1) 0.5< DELTA nxR<1.3, and (2) 3.5< DELTA nxd<8.0. A multiplexed driving is employed for driving the liquid crystal optical element.
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