OPTICAL MODULE AND MANUFACTURING METHOD THEREOF

摘要

An optical module and a manufacturing method thereof are provided which can improve positioning accuracy between parts. A barrel and a lens holder are prepared, the lens holder is fitted into a cylindrical portion from a collar portion side of the barrel, and the barrel and the lens holder are assembled. In this case, the barrel and the lens holder are assembled with a brazing material inserted therebetween. The assembled barrel and lens holder are heated, and the brazing material is melted to thereby perform brazing. Lens glass is sandwiched between metal dies and a lens is press-molded using a pressing apparatus. In this case, positioning of press molding is performed using the barrel for which a small linear expansion coefficient is set as a reference.

主权项

1. A method for manufacturing an optical module, comprising:
a preparation step of preparing a barrel and a lens holder, the barrel comprising a cylindrical portion and a cover portion provided at one end of the cylindrical portion and provided with a through hole, the other end of the cylindrical portion being left open, the barrel being formed of a material having a first linear expansion coefficient, the lens holder comprising a lens mounting hole and formed of a material having a second linear expansion coefficient larger than the first linear expansion coefficient; an assembly step of assembling the barrel and the lens holder so that the through hole is aligned with the lens mounting hole; and a lens molding step of press-molding lens glass having a third linear expansion coefficient which is smaller than the second linear expansion coefficient into the lens mounting hole while positioning the assembled barrel and lens holder using the barrel, cooling the press-molded lens glass and thereby providing a lens in the lens holder.