Image projection apparatus wherein, a focusing lens is controlled when a shutter
is operated so that a contrast signal, obtained when a luminance signal from a
camera signal processing circuit is supplied to an auto focusing detection circuit,
may become maximum. A laser diode is driven to generate laser beams that are condensed
into parallel laser beams by a condenser. These parallel laser beams are applied
to a hologram plate and thereby diffracted. The diffracted laser beams interfere
with each other, to produce a hologram image with sufficient contrast. Therefore,
satisfactory focusing can be made in an auto focus mode of the contrast detection
system or in a manual focus mode.
