Compact Optical Amplifier Module Using Adhered Phase Delay Plates
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Solution Overview
Problem
Existing optical amplification modules are large in size and volume, making them unsuitable for small-space applications such as intelligent virtual reality (VR) wearable devices, which require high magnification and compactness.
Innovation Solution
A short-distance optical amplification module is designed using a configuration of a first phase delay plate, an imaging lens, a second phase delay plate, and a reflective polarizing plate, where the second phase delay plate and reflective polarizing plate are arranged to adhere to each other, reducing the module's size and volume while maintaining optical magnification. Additionally, an absorptive polarizing plate is used to prevent external light interference, and the imaging lens is designed with one side as a flat surface to reduce chromatic dispersion and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple optical devices are used to meet imaging quality requirements, then imaging quality is improved, but the size and volume of the optical amplification module increase
Solution Approach 1:
The patent merges multiple optical functions into fewer optical devices. Specifically, it uses a reflective polarizing plate that combines polarization selection and reflection functions, and phase delay plates that combine phase modulation and polarization conversion functions. This integration reduces the number of separate optical components while maintaining imaging quality, directly resolving the contradiction between imaging quality and module volume.
Solution Approach 2:
The optical devices in the patent are designed to perform multiple functions simultaneously. The reflective polarizing plate serves both as a polarization filter and a reflector, while the phase delay plates perform both phase modulation and polarization state conversion. This multi-functionality reduces the total number of components needed, thereby reducing module volume while preserving imaging quality.
2Power
If multiple optical devices are used to achieve optical magnification, then magnification performance is improved, but the size and volume of the module increase
Solution Approach 1:
The patent combines magnification and polarization control functions into an integrated optical path. The phase delay plates and reflective polarizing plate work together in a compact arrangement to achieve both magnification and polarization management, eliminating the need for separate magnification optics and polarization control components, thus reducing module volume while maintaining magnification performance.
Solution Approach 2:
The patent utilizes the polarization dimension to achieve magnification through a different mechanism than traditional geometric optics. By manipulating the polarization state of light through phase delay plates and reflective polarizing plates, the system achieves magnification in a compact configuration that doesn't require large physical optical paths, thereby resolving the contradiction between magnification performance and module volume.
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 module achieves optical magnification with reduced size and volume, enhancing the comfort and usability of VR glasses by minimizing the weight and thickness, while maintaining high imaging quality and preventing external light interference.
Implementation Method 1
a first phase delay plate arranged in a transmission path of an optical image having a first linear polarization direction and configured for converting the polarization direction of the optical image from the first linear polarization direction to an elliptical or circular polarization direction
Implementation Method 2
an imaging lens arranged in a transmission path of an optical image having an elliptical or circular polarization direction... and configured for amplifying an optical image passing through the first optical surface
Implementation Method 3
a second phase delay plate arranged on one side of the second optical surface of the imaging lens and configured for converting the polarization direction of the optical image from the elliptical or circular polarization direction to a second linear polarization direction
Implementation Method 4
the reflective type polarizing plate is configured for reflecting an optical image having the second linear polarization direction that is transmitted from the second phase delay plate
Implementation Method 5
an absorptive polarizing plate is used to prevent external light interference
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Disclosed are a short-distance optical amplification module, an amplification method and an amplification system. The module comprises a first phase delay plate (2), an imaging lens (4), a second phase delay plate (5) and a reflective type polarizing plate (6), wherein the first phase delay plate (2) is arranged in a transmission path of an optical image having a first linear polarization direction, the imaging lens (4) is arranged in a transmission path of an optical image having an elliptical or circular polarization direction, and the second phase delay plate (5) is arranged on one side of a second optical surface of the imaging lens. A second linear polarization direction is orthogonal to the first linear polarization direction. By means of the first phase delay plate (2), the imaging lens (4), the second phase delay plate (5) and the reflective type polarizing plate (6), an optical image is reflected by the reflective type polarizing plate (6) on a transmission path, and then is amplified on the imaging lens (4). Thus, not only the optical image can meet the requirement of optical magnification, but also the second phase delay plate (5) and the reflective type polarizing plate (6) can be arranged to adhere to each other, thereby further reducing the size and volume of an optical module.