(57) An adjusting apparatus (20,30) comprises a base (21,31) and a supporting frame (22,32),
a fixed plate (23,33), a sliding stand (24,34), and a carrier (25,35), which are sequential
stacked on the base (21,31). An optical engine is fixed on the carrier (25,35). By
rotating the adjusting device (215,236,253,315,336,353), the axis position of optical
engine can be adjusted along sliding slots (224A,224B,243A,243B) guided by bulges
(212,233). By using arc surfaces (246,254) of the sliding stand (24,34) and the carrier
(25,35), the adjusting apparatus (20,30) clips and pushes the blocks of the carrier
(25,35) to adjust the left and right angle of inclination of optical engine. Therefore,
the light beam provided by optical engine could project on a screen precisely and
reach the optimum projection performance.
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