Optical Device Asymmetric Light Splitting Surface
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Solution Overview
Problem
In optical fiber communications, the existing wave plate design causes edge rays to have different refraction angles, resulting in focal points that cannot converge with the central axis ray, leading to inefficient coupling of optical signals.
Innovation Solution
An optical device with a light splitting surface and two parallel surfaces, where the light splitting surface intersects both and is not perpendicular to them, using a light transmissive medium to ensure equal incident and refraction angles for edge rays, allowing them to converge with the central axis ray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a wave plate is used for light path filtering, then the optical device structure is simple, but edge rays have different refraction angles causing focal spot deformation and poor signal coupling efficiency
Solution Approach 1:
The patent applies asymmetry by designing the light splitting surface with a specific non-perpendicular angle relative to the parallel surfaces. This asymmetric configuration ensures that edge rays incident at different positions undergo equal refraction angles, causing them to converge at the same focal point as the central axis ray, thereby eliminating focal spot deformation while maintaining structural simplicity
Solution Approach 2:
The patent changes the geometric parameter of the light splitting surface by setting its angle relative to the parallel surfaces to a specific value that is not 90 degrees. This parameter adjustment optimizes the refraction behavior of edge rays, ensuring equal refraction angles and proper convergence at the focal point, thus improving signal coupling efficiency without complicating the device structure
2Device complexity
If the light splitting surface is perpendicular to the parallel surfaces, then the device structure is simplified, but edge rays cannot converge with the central axis ray at the focal point
Solution Approach 1:
The patent deliberately avoids the symmetric perpendicular configuration by introducing an asymmetric angle between the light splitting surface and the parallel surfaces. This asymmetric design creates equal refraction angles for edge rays, enabling them to converge with the central axis ray at the focal point, thus improving signal coupling efficiency while keeping the device structure relatively simple
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
This design improves the convergence of optical signals, reducing focal spot deformation and enhancing the efficiency of signal coupling by ensuring symmetrical refraction of edge rays relative to the central axis ray.
Implementation Method 1
According to the light refraction law, incident angles of the central axis ray 21, the edge ray 22 and the edge ray 23 relative to the optical axis 24-1 of the wave plate 24 are 45 degrees, θ1 and θ2 respectively
Data Source
AI summary
An optical device and an optic transceiver device are provided. The optical device includes a light splitting surface. The optical device further includes a first surface and a second surface disposed opposite to each other and parallel to each other. The light splitting surface separately intersects the first surface and the second surface. An angle between the light splitting surface and the first surface is not equal to 90 degrees. A medium between the light splitting surface and the first surface and a medium between the light splitting surface and the second surface are the same. The medium is formed by a light transmissive material.