Tilted Contact Surface Optical Receptacle for Feedback Suppression
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Solution Overview
Problem
Existing optical receptacles face challenges in reducing optical feedback, achieving stable and accurate attachment of photoelectric conversion devices, ensuring optical performance, and maintaining low manufacturing costs, particularly when using single-mode optical fibers.
Innovation Solution
An optical receptacle with a cylindrical optical fiber attaching section and a photoelectric conversion device attaching section integrally formed by a light-transmitting resin, where the contact surface for the photoelectric conversion device is tilted relative to the optical axis, allowing for effective suppression of optical feedback using a general-purpose device, stable integration, and accurate attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the contact surface for the photoelectric conversion device is tilted relative to a plane perpendicular to the optical axis, then optical feedback is reduced, but attachment accuracy and stability become more difficult to achieve
Solution Approach 1:
The patent introduces a tilt angle dimension to the contact surface of the photoelectric conversion device attaching section. By tilting the contact surface at a specific angle (e.g., 5-15 degrees) relative to the plane perpendicular to the optical axis, the reflected light from the light-receiving element is redirected away from the optical path, effectively reducing optical feedback while maintaining attachment accuracy through precise angular control in the molding process.
2Ease of manufacture
If the optical receptacle is integrally formed by injection molding, then manufacturing cost and complexity are reduced, but achieving precise tilt angles and stable attachment becomes more challenging
Solution Approach 1:
The patent incorporates the tilt angle configuration directly into the mold design during the injection molding process. The mold includes predetermined guide surfaces and positioning features that automatically establish the correct tilt angle (e.g., 5-15 degrees) for the contact surface during molding. This preliminary action ensures precise angular orientation is achieved consistently without requiring additional post-processing or assembly steps, thereby maintaining both cost-effectiveness and manufacturing precision.
3Ease of manufacture
If a through-hole is bored into the photoelectric conversion device attaching section for gas escape, then adhesive gas can vent during bonding, but structural integrity and optical performance stability are compromised
Solution Approach 1:
The patent modifies the photoelectric conversion device attaching section by providing localized recesses or cavities near the contact surface where adhesive gas can escape during bonding. These localized gas escape paths are strategically positioned to allow venting of adhesive gases without creating through-holes that would compromise the overall structural integrity. The recesses are designed to be sufficient for gas escape while maintaining the strength and optical performance stability of the attaching section.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces optical feedback, ensures stable optical performance, and enhances manufacturing efficiency and cost-effectiveness, particularly when using single-mode optical fibers.
Implementation Method 1
a lens 2 in a substantially center position in a length direction. The lens 2 is formed into a plano-convex lens in which a face 2a in one optical axis OA direction of the lens 2 (downward in FIG. 10) is a convex face
Implementation Method 2
The optical receptacle 1 is integrally formed by injection molding of a light-transmitting resin material, such as polyetherimide (PEI), polycarbonate (PC), polyethersulfone (PES), cyclo olefin polymer (COP), or poly (methyl methacrylate) (PMMA)
Implementation Method 3
the contact surface for the photoelectric conversion device in the photoelectric conversion device attaching section is formed having a tilt in relation to a plane that is perpendicular to the optical axis of the lens
Data Source
AI summary
An optical fiber attaching section, a photoelectric conversion device attaching section, and a lens are integrally formed by a light-transmitting resin material. The optical fiber attaching section is formed concentrically with an optical axis OA of the lens. A contact surface for the photoelectric conversion device in the photoelectric conversion device attaching section is formed having a tilt in relation to a plane that is perpendicular to the optical axis OA. As the photoelectric conversion device, a photoelectric conversion device is attached in which a contact surface for the photoelectric conversion device attaching section is formed in parallel with a light-receiving surface of a light-receiving element.