A method of a multi-prism mechanism for a laser exposure system of three-dimensional images for digital three-dimensional image printing, comprising steps of:
- S1) obtaining first photo information from a computer by a laser driving control panel, transforming the first photo information and sending to three acousto-optical driving controllers, so as to send corresponding orders to acousto-optical regulators of three laser generator sets, in such a manner that the corresponding acousto-optical regulators transform the first photo information into corresponding RGB color monochrome first laser beams;
- reflecting the first laser beams into a spotting reflecting mirror through a light valve, a directing lens, an optical zooming lens and a laser reflecting mirror, wherein because there are three laser generator sets in parallel, the first laser beams reflected into the spotting reflecting mirror by the laser reflecting mirror are the RGB first laser beams;
- reflecting the first laser beams to an angle-switching reflecting mirror by the spotting reflecting mirror, then reflecting the first laser beams to a multi-prism unit by the angle-switching reflecting mirror;
- reflecting the first laser beams to a mirror of a multi-prism through a light inputting opening of a lens cap of the multi-prism unit, and reflecting the first laser beams to a reflecting mirror and a light detecting reflecting mirror by the mirror through a light outputting opening of the lens cap and a lens, wherein because the multi-prism is mounted on a rotatable holder, the multi-prism rapidly rotates with the rotatable holder;
- therefore, light reflected by the multi-prism has a radiation range;
- as a result, when the first laser beams reach the light detecting reflecting mirror, instantly reflecting the first laser beams to a light detecting device by the light detecting reflecting mirror, transmitting information of the first laser beams obtained to the laser driving control panel by the light detecting device, transforming the first laser beams into first laser beam information and feeding back to the computer by the laser driving control panel, providing a laser beam section and a radiation width by the computer according to angle requirements of each image, feeding back information to the laser driving control panel, then transforming the information and sending to the acousto-optical driving controllers by the laser driving control panel, sending to the laser controlling and launching unit by the acousto-optical driving controllers, and step by step reflecting the first laser beams to the mirror of the multi-prism by the laser controlling and launching unit, then reflecting to the reflecting mirror by the multi-prism, transforming the first laser beams reflected by the multi-prism into first linear scanning lines by the reflecting mirror, and reflecting to a three-dimensional photosensitive material through an optical grating for first moving scanning exposure;
- S2) obtaining deflecting angle data information of another photo relative to a previous photo and shifting data information of a photosensitive platform by the computer, and sending a deflecting order to the multi-prism and a shifting order to the photosensitive platform, wherein a shifting direction is within the radiation width, in such a manner that an angle of laser linear beams reflected by a prism face of the mirror of the multi-prism of the multi-prism unit and a position of the photosensitive platform in the step S2 are misplaced when being compared with states thereof in the step S1;
- S3) obtaining a second photo information in the step S2 from the computer by the laser controlling and launching unit, launching second laser beams by a laser exposure system according to the second photo information, perpendicularly reflecting the second laser beams to the angle-switching reflecting mirror by the spotting reflecting mirror of the laser controlling and launching unit, then reflecting to the prism face of the mirror of the multi-prism of the multi-prism unit by the angle-switching reflecting mirror, reflecting the second laser beams to the reflecting mirror by the prism face of the mirror through the lens for forming second scanning lines, and reflecting to the three-dimensional photosensitive material through the optical grating for second moving scanning exposure;
- and
- S4) repeating the step S2 and the step S3, until moving scanning exposure of all images is finished.