| 摘要 |
PURPOSE: To reduce the assembling man-hours for an optoelectric transducing element and an optical element and to decrease assembling error by forming integrally the optical element and a hold member and fitting a laser element to the optical element. CONSTITUTION: Lots of thin stripe shaped grooves 50a are provided on a face opposite to an emission face of a laser diode 20 to form a diffraction grating, and a convex spherical face 50b is provided on a face from which a light beam is emitted to an objective lens 26 via a beam splitter 23 to form a collimator lens. Furthermore, a concave spherical fase 50c is provided on a face on which a light beam reflected in a half mirror face 23a of the splitter 23 is made incident to form a concave lens, and a cylindrical face 50d is formed on its emission face to form a cylindrical lens. |
