Optical information recording/reproduction device and adjustment method

2:

• The optical information recording/reproduction device according to claim 1, wherein
• the optical axis adjustment unit adjusts angles of the signal light and the reference light incident on the optical information recording medium to cause the signal light and the reference light to interfere with each other on the optical information recording medium.

3:

• The optical information recording/reproduction device according to claim 1, further comprising:
• a wavefront measurement unit configured to measure a wavefront aberration of the laser light, wherein
• the optical axis adjustment unit adjusts the optical axis of the laser light to cause the measured wavefront aberration to become small.

4:

• The optical information recording/reproduction device according to claim 1, wherein
• the photodetector detects at least a part of the signal light, and
• the optical axis adjustment unit adjusts the optical axis of the laser light, based on the detected result.

5:

• The optical information recording/reproduction device according to claim 4, wherein
• the optical axis adjustment unit adjusts the optical axis of the laser light to cause the signal light to be incident on a center of the photodetector.

(canceled)

8:

• The optical information recording/reproduction device according to claim 1, wherein
• a relay lens is arranged between the laser light source and the branching element.

9:

• The optical information recording/reproduction device according to claim 8, wherein
• the optical axis adjustment unit drives the relay lens to adjust the optical axis of the laser light.

10:

• The optical information recording/reproduction device according to claim 8, wherein
• a beam shaping element is arranged at a side close to the laser light source than the relay lens, and
• the optical axis adjustment unit drives the beam shaping element to adjust the optical axis of the laser light.

11:

• The optical information recording/reproduction device according to claim 8, wherein
• a wedge prism is arranged at a side closer to the laser light source than the relay lens, and
• the optical axis adjustment unit drives the wedge prism to adjust the optical axis of the laser light.

12:

• The optical information recording/reproduction device according to claim 8, wherein
• a mirror that reflects the laser light is arranged at a side close to the laser light source than the relay lens, and
• the optical axis adjustment unit drives the mirror to adjust the optical axis of the laser light.

14:

• The adjustment method according to claim 13, further comprising the step of:
• measuring a wavefront aberration of the laser light, wherein
• the adjusting step adjusts the optical axis of the laser light to cause the measured wavefront aberration to become small.

15:

• The adjustment method according to claim 13, further comprising the step of:
• detecting at least a part of the signal light, wherein
• the adjusting step adjusts the optical axis of the laser light, based on the detected result.