Disk for light beam recording device and light beam recording device
AssigneeFjui Photo Film Co., Ltd.
InventorHidetoshi Shinada
Life of this patent
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Abstract
A light beam recording device. A light beam irradiated from a light beam irradiating device is scanned onto an object to be illuminated, which is provided in a vicinity of a focal position, while being focussed by a scanning optical system. A converging member is disposed on an optical path between the light beam irradiating device and the scanning optical system, and converges a light beam which is incident on the converging member. An optical path changing device is disposed in a vicinity of a converging position of a light beam which is converged by the converging member, and changes an optical path of the light beam.
Claims6
A disk for a light beam recording device comprising:
- a disk main body provided so as to be rotatable around a substantial center of said disk main body;
- and
- beam waist position changing means provided on said disk main body, said beam waist position changing means being provided along a direction of rotation of said disk main body and being disposed in a vicinity of a beam waist position of a converging light beam transmitted through said main disk body for changing the beam waist location of said converging light beam according to a predetermined pattern.
A disk for a light beam recording device comprising:
- a disk main body provided so as to be rotatable around a substantial center of said disk main body;
- and
- optical path changing means provided on said disk main body for changing an optical path of a light beam transmitted through said disk main body, said optical path changing means being provided along a direction of rotation of said disk main body to change said optical path of said light beam along the direction of rotation of said disk main body according to a predetermined pattern, wherein said optical path changing means is provided with a plurality of optical path changing portions disposed coaxially and having different rates of changing said optical path in a radial direction of said disk main body.
Dependencies are inferred from the claim text.