HOLOGRAM RECORDING DEVICE

摘要

A hologram recording device (A1) for recording a hologram by applying recording light (S) and reference light (R) to a recording medium (B) through the same objective lens (13) comprises a light dividing means (3) for dividing light from a light source (1) into the recording light (S) and the reference light (R), a light combining means (11) for combining the recording light (S) and the reference light (R) which are obtained by the division by the light dividing means (3) so as to form concentric lights and advancing the lights to the objective lens (13), a first and a second lens (5, 9) located on optical paths of the recording light (S) and the reference light (R) between the light dividing means (3) and the light combining means (11), a first aperture (6) for narrowing down the recording light (S) transmitted through the first lens (5), and a second aperture (10) for narrowing down the reference light (R) transmitted through the second lens (9). The first and the second lens (5, 9) have different optical powers.