US 4,070,681 A · Modulated laser

Abstract

In an image information recording apparatus which comprises a laser oscillator, means for deflecting and modulating the laser beam from the laser oscillator by an external signal, a recording medium, optical means for imaging the modulated laser beam on the recording medium and means for causing the laser beam to scan over the recording medium, the light path of the laser beam is divided into a plurality of light path sections and partition plates are provided before and behind each of the light path sections and have holes formed at the portions thereof corresponding to the center of the optical axis. Thus, the optical axis in the apparatus may be adjusted by passing the laser beam through the center of the holes in the partition plates.

Claims19

Dependent claims

In an image information recording apparatus comprising, a laser beam forming means for forming a laser beam modulated in accordance with an image information signal, optical means for focussing the modulated laser beam on a recording medium, an optical scanner for scanning the modulated laser beam, and a frame structure for placing therein said laser beam forming means, said optical means and said optical scanner, the improvement comprising:

optical axis detecting means mounted at a position to receive the laser beam and to detect deviation from a predetermined optical axis passing through the position at which said detecting means is mounted of the actual optical axis passing therethrough after said laser beam forming means, said optical means and said optical scanner are mounted in the frame structure, to thereby facilitate fine adjustment of the actual optical path of the laser beam.

Dependencies are inferred from the claim text.

Modulated laser

Life of this patent

Modulated laser

Life of this patent

Abstract

Claims19