| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive hologram image projector of a simple structure which can distinctly project a specific image recorded on a hologram onto a subject, and provide an information code reader which contains the same as a marker projector. <P>SOLUTION: The image projector condenses a laser beam, irradiates the hologram with the condensed laser beam to reconstruct the specific image recorded on the hologram, and projects the image onto the subjects, in which the one face of a convex lens for condensing the laser beam is formed of a plane shape and the hologram diffraction grating recording the specific image is formed on the plane. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
