| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical recording medium recording and reproducing device which can read out a hologram image of a residual part with excellent precision by using an optical recording medium on which hologram image is previously recorded and destroying a desired part of the image so as to be unable to record again and then cutting unnecessary reflected light from the destroyed part to make only diffracted light from a residual part receivable when image parts except this part are read out. SOLUTION: An optical card D has a protective film D4 laminated on an area D2 where hologram is recorded on a light-transmissive substrate D1. A device C, which destroys a part or whole of the area D2 of the optical card D, records information in the area D2 and reproduces the area D2, is provided with an image pickup element 11A2 and an impact head 12AA. Further an angleθof a tapered surface 12A1a of an top end 12A1 of a pin 12A of a head 12AA is set within a desired angle range.</p> |
