| 摘要 |
<p>The hologram laser unit of this invention includes a laser light source (2) and an optical detector (3) formed integrally and secured to an optical system including an objective lens (8), wherein an optical element (4) is disposed between the laser light source and the objective lens, a hologram element (5) is formed on a surface of the optical element facing the laser light source, and an aberration compensation element (6-1) is formed on a surface of the optical element facing the objective lens, the optical element being constructed so that a light beam output from the laser light source and converged by the objective lens is divided into two light beams. <IMAGE></p> |
