Optical component, injection molding die for optical component, and injection molding method for optical component

Patent metadata

Field	Value
Publication number	US-10830969-B2
Application number	US-201716349852-A
Country	US
Kind code	B2
Filing date	Oct 27, 2017
Priority date	Nov 15, 2016
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

An optical component is configured to optically connect a light-emitting element and an optical fiber, and includes an optical surface arranged in a middle of an optical path of a light to be emitted from the light-emitting element to the optical fiber to reflect the light. The optical surface includes an optical path area configured to reflect the light and a non-optical path area other than the optical path area, and the optical path area and the non-optical path area are coplanar. The optical path area has a smooth surface, and at least a part of the non-optical path area has a rough surface which is rougher than the optical path area.

First claim

The invention claimed is:

1. An optical component configured to optically connect a photoelectric conversion element and an optical transmission member, the optical component comprising:
an optical surface arranged in a middle of an optical path between the photoelectric conversion element and the optical transmission member to reflect a light traveling along the optical path,
wherein:
the optical surface has an optical path area configured to reflect the light and a non-optical path area other than the optical path area;
the optical path area and the non-optical path area are coplanar,
the optical path area has a smooth surface; and
at least a part of the non-optical path area has a rough surface which is rougher than the optical path area.

2. The optical component according to claim 1 , wherein an entirety of the non-optical path area has the rough surface.

3. The optical component according to claim 1 , wherein the at least the part of the non-optical path area surrounds the optical path area.

4. The optical component according to claim 1 , wherein the at least the part of the non-optical path area surrounds the optical path area in a frame shape.

5. An injection molding method for an optical component configured to optically connect a photoelectric conversion element and an optical transmission member, the optical component having an optical surface arranged in a middle of an optical path between the photoelectric conversion element and the optical transmission member, the optical surface having an optical path area configured to reflect or transmit a light traveling along the optical path and a non-optical path area other than the optical path area, the optical path area and the non-optical path area being coplanar, the injection molding method comprising:
forming the optical component by injecting molten resin into a cavity of an injection molding die;
transferring a smooth surface of an optical surface cavity inner face of the cavity to the optical path area; and
transferring a rough surface which is rougher than the smooth surface on the optical surface cavity inner face of the cavity to at least a part of the non-optical path area.

6. An injection molding die for an optical component configured to optically connect a photoelectric conversion element and an optical transmission member, the optical component having an optical surface arranged in a middle of an optical path between the photoelectric conversion element and the optical transmission member, the optical surface having an optical path area configured to reflect or transmit a light traveling along the optical path and a non-optical path area other than the optical path area, the optical path area and the non-optical path area being coplanar, the injection molding die comprising:
a cavity configured to shape the optical component, the cavity having an optical surface cavity inner face configured to form the optical surface;
wherein:
a portion of the optical surface cavity inner face for shaping the optical path area has a smooth surface; and
a portion for shaping at least a part of the non-optical path area has a rough surface which is rougher than the optical path area.

7. The optical component according to claim 1 , wherein:
the optical surface is a second optical surface;
the optical component further comprises a first optical surface facing the photoelectric conversion element and configured to transmit the light and a third optical surface facing the optical transmission member and configured to transmit the light; and
the second optical surface is between the first optical surface and the third optical surface.

8. The optical component according to claim 7 , wherein the at least the part of the non-optical path area surrounds the optical path area.

9. The optical component according to claim 7 , wherein the at least the part of the non-optical path area surrounds the optical path area in a frame shape.

10. The optical component according to claim 7 , wherein an entirety of the non-optical path area has the rough surface.

Assignees

• Enplas Corp

Inventors

• Saito Yuki

Classifications

• B29C45/37 Primary

  Mould cavity walls {, i.e. the inner surface forming the mould cavity, e.g. linings} · CPC title

• B29L2011/0016

  Lenses · CPC title

• B29K2995/0073

  smooth · CPC title

• G02B6/32

  having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} · CPC title

• B29K2079/085

  Thermoplastic polyimides, e.g. polyesterimides, PEI, i.e. polyetherimides, or polyamideimides; Derivatives thereof · CPC title