OPTICAL INFORMATION PLAYBACK DEVICE AND ADJUSTMENT METHOD

摘要

The objective of the present invention is, using an optical system which performs adjustment, to allow a reference beam optical system to be adjustable with high accuracy. The present invention is an optical information reproduce device which reproduces back information that has been recorded using angle-multiplexing holography on an optical information recording medium, said optical information reproduce device being provided with: a light source for generating a reference light; a first actuator which varies the angle of the reference light that is incident to the optical information recording medium; phase conjugate generation means configured by combining a condenser lens which generates phase-conjugated beams of light that has been transmitted through the optical information recording medium, and a movable mirror; a second actuator which drives the movable mirror; and a reference light measurement unit which measures divergence and convergence of the reference light from the phase conjugate generation means.

主权项

1. An optical information reproduce device configured to reproduce information recorded on an optical information recording medium by an angle-multiplexed holography, the device comprising:
a light source configured to generate reference light; a first actuator configured to vary an incident angle of the reference light generated by the light source into the optical information recording medium; a phase conjugate generating unit configured to generate phase conjugate light of light transmitted by the optical information recording medium, the unit comprising a condenser lens and a movable mirror; a second actuator configured to drive the movable mirror; and a reference light measuring unit configured to measure divergence or convergence of the phase conjugate light.