Optical coupling lens module and optical fiber connector

Abstract

An optical coupling lens module includes a body, a first convex lens, a light reflector, and a second convex lens. The body has an inner bottom surface, a positioning protrusion, and a mating surface, wherein the positioning protrusion protrudes from the mating surface to mate with an optical fiber patch cord. The mating surface includes a first abutment surface and a second abutment surface that are different from each other to accommodate the optical fiber patch cord. The positioning protrusion occupies a portion of the first abutment surface and a portion of the second abutment surface. The first convex lens is disposed on the inner bottom surface, the light reflector is disposed within the body, and the second convex lens is disposed on the mating surface. A light beam generated by a light source sequentially passes through the first convex lens, the light reflector, and the second convex lens to be transmitted to the optical fiber patch cord. An optical fiber connector is also disclosed.

Claims

1. An optically coupled lens module, comprising: The body has an inner bottom surface, a positioning protrusion, and a mating surface, wherein the positioning protrusion protrudes from the mating surface to be adapted to mate with a fiber jumper. The mating surface includes a first abutment surface and a second abutment surface that are different from each other to fit the fiber jumper. The positioning protrusion occupies a portion of the first abutment surface and a portion of the second abutment surface. A first convex mirror is disposed on the inner bottom surface to receive a first light beam from a light source and convert it into a parallel light beam. A light reflector is disposed within the body to receive and transmit the parallel light beam. A second convex mirror is disposed on the outer surface of the body to receive the parallel light beam, convert it into a second light beam, and transmit it to the fiber core of the fiber jumper.

2. The optical coupling lens module as claimed in claim 1, wherein the body further has a first side and a second side opposite to each other, and the body forms an intermittent recess on the first side and the second side respectively, and the body forms a double-layer structure on the first side and the second side respectively.

3. The optical coupling lens module as claimed in claim 1, wherein the body further has an outer bottom surface surrounding the inner bottom surface and for resting on the circuit board assembly, the light source being disposed on the circuit board assembly to face the first convex lens.

4. The optical coupling lens module as claimed in claim 3, wherein the second abutment surface is adjacent to the outer bottom surface, and the first abutment surface is away from the outer bottom surface.

5. The optical coupling lens module as claimed in claim 1, wherein the second abutment surface is aligned with or parallel to the reference surface, the first abutment surface is at an 8-degree angle relative to the reference surface, and the reference surface is the normal plane of the optical axis of the second beam, so that the first abutment surface and the second abutment surface are adapted to the fiber optic patch cord with different angle interfaces.

6. An optical fiber connector, comprising: Metal casing; Two optical coupling components are disposed within the metal housing. Each optical coupling component includes: an optical coupling lens module, comprising: a body having an inner bottom surface, a positioning protrusion, and a mating surface, wherein the positioning protrusion protrudes from the mating surface, and the mating surface includes a first abutment surface and a second abutment surface that are different from each other, the positioning protrusion occupying a portion of the first abutment surface and a portion of the second abutment surface; a first convex mirror disposed on the inner bottom surface; a light reflector disposed within the body; a second convex mirror disposed on the mating surface; a light source; an optical fiber patch cord; and a circuit board assembly, wherein the light source, the optical fiber patch cord, and the body are respectively disposed on the circuit board assembly, wherein the two optical coupling lens modules of the two optical coupling components are adjacent to each other and far from the metal housing, and the two circuit board assemblies of the two optical coupling components are opposite each other and adjacent to the metal housing through the two optical coupling lens modules, wherein the light beam generated by the light source passes sequentially through the first convex mirror, the light reflector, and the second convex mirror and is transmitted to the optical fiber patch cord.

7. The fiber optic connector as claimed in claim 6 further includes two heat-conducting elements disposed on the two circuit board assemblies and abutting against the metal housing, so as to transfer the heat generated by the light source, the optical coupling lens module and the circuit board assembly to the metal housing via the heat-conducting elements.

8. The fiber optic connector as claimed in claim 7, wherein the circuit board assembly includes a board body and a thermally conductive portion passing through the board body and exposed from at least one surface of the board body, and the thermally conductive element abutting against the thermally conductive portion exposed on the board body.

9. The fiber optic connector as claimed in claim 6, wherein the center-to-center distance between the two circuit board assemblies is less than 3.0 mm.

10. The fiber optic connector as claimed in claim 6, wherein the center-to-center distance between the two circuit board assemblies is less than 3.5 mm.

11. The fiber optic connector as claimed in claim 6, wherein the body further has a first side and a second side opposite to each other, and the body forms spaced recesses on the first side and the second side respectively, and the body forms a double-layer structure on the first side and the second side respectively.

12. The fiber optic connector as claimed in claim 11, wherein the optical coupling assembly further includes an adhesive filling the spacer recess and adjacent to the body and the circuit board assembly.

13. The fiber optic connector as claimed in claim 6, wherein the body further has an outer bottom surface surrounding the inner bottom surface and for resting on a circuit board assembly, the light source being disposed on the circuit board assembly to face the first convex lens.

14. The fiber optic connector as claimed in claim 13, wherein the second abutting surface is adjacent to the outer bottom surface, and the first abutting surface is away from the outer bottom surface.

15. The fiber optic connector as claimed in claim 6, wherein the second abutment surface is aligned with or parallel to a reference surface, the first abutment surface is at an 8-degree angle relative to the reference surface, the reference surface being the normal plane of the optical axis into which the light beam enters the fiber optic patch cord, such that the first abutment surface and the second abutment surface are adapted to the fiber optic patch cord having a different angle of contact.

16. The fiber optic connector as claimed in claim 6, wherein the second convex lens has a height (h1) relative to the circuit board assembly to adapt to the fiber optic connector formed by stacking two circuit board assemblies having a spacing (h2), the height (h1) ≤ 1.3 mm and the spacing (h2) ≥ 2.85 mm.

Images