Optical module and manufacturing method thereof

摘要

An optical module and a manufacturing method 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 one case, the barrel and the lens holder are assembled with a brazing material. The assembled barrel and lens holder are heated, and the brazing material is melted to braze the barrel and the lens holder. Lens glass is sandwiched between metal dies and a lens is press-molded using a pressing apparatus. In one case, positioning of press molding uses the barrel which has a small linear expansion coefficient.

主权项

1. A method for manufacturing an optical module, comprising:
preparing a barrel and a lens holder, the barrel comprising a cylindrical portion and a cover portion located at a first end of the cylindrical portion and including a through hole, wherein the cylindrical portion has a second end that is open, the barrel has a first linear expansion coefficient, and the lens holder comprises a lens mounting hole and has a second linear expansion coefficient that is larger than the first linear expansion coefficient; assembling the barrel and the lens holder so that the through hole is aligned with the lens mounting hole; and 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 barrel and lens holder, using the barrel, and cooling the lens glass, thereby providing a lens in the lens holder.