Transmitter With Annular Reflectors For Horizontal Beam Expansion
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Solution Overview
Problem
Existing spatial light communication systems struggle to transmit spatial light signals with a large beam diameter in any direction along a horizontal plane, limiting their effectiveness in wide-range communication.
Innovation Solution
A transmitter configuration that includes a light source, a spatial light modulator, a first and second annular reflector, a diffusion transmitter, and a ball lens, where the modulated light is reflected and diffused to change its optical path in a horizontal plane, allowing for the expansion of the beam diameter in any direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light source is positioned close to the ball lens to condense light, then light condensation efficiency is improved, but the ability to emit light flux with large beam diameter in any direction is lost
Solution Approach 1:
The optical system is divided into multiple functional segments: the light source and ball lens handle light condensation, while the annular reflectors and diffusion transmitter separately handle light distribution and beam expansion. This segmentation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
The annular reflectors act as intermediaries between the ball lens and the diffusion transmitter. They receive the condensed light from the ball lens and redirect it to the diffusion transmitter, enabling the system to achieve both condensation and omnidirectional emission capabilities.
2Area of stationary object
If the projection angle is widened by controlling the spatial light modulator pattern, then the transmission range is improved, but the beam diameter expansion capability is reduced
Solution Approach 1:
The system addresses beam diameter expansion not through the spatial light modulator's pattern control (2D plane control) but through a separate optical path using annular reflectors and diffusion transmitter. This separates the angular control function from the beam diameter control function, allowing both to be optimized independently.
3Device complexity
If a single optical path is used for light transmission, then the device complexity is reduced, but the ability to expand beam diameter in any horizontal direction is lost
Solution Approach 1:
The annular reflectors are disposed concentrically (nested) around the optical axis, with the second annular reflector surrounding the first annular reflector. This nested arrangement allows multiple reflection surfaces to occupy the same spatial region without interfering with each other, enabling complex beam shaping within a compact structure.
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
Enables the transmission of spatial light signals with an expanded beam diameter in any direction along the horizontal plane, enhancing the range and flexibility of spatial light communication systems.
Implementation Method 1
The ball lens condenses and emits light
Implementation Method 2
a first annular reflector that has a first annular reflection surface irradiated with modulated light modulated by the modulation part
Implementation Method 3
a second annular reflector that is disposed concentrically with the first annular reflector and has a second annular reflection surface irradiated with the modulated light reflected by the first annular reflection surface
Implementation Method 4
a diffusion transmitter that is irradiated with the modulated light reflected by the second annular reflection surface, changes an optical path of the irradiated modulated light in a direction along a horizontal plane, and diffuses and transmits the modulated light having the changed optical path
Data Source
AI summary
Provided is a transmitter including a light source that emits illumination light, a spatial light modulator that includes a modulation part to which the illumination light emitted from the light source is irradiated, a first annular reflector that has a first annular reflection surface irradiated with modulated light modulated by the modulation part, a second annular reflector that is disposed concentrically with the first annular reflector and has a second annular reflection surface irradiated with the modulated light reflected by the first annular reflection surface, a diffusion transmitter that is irradiated with the modulated light reflected by the second annular reflection surface, changes an optical path of the irradiated modulated light in a direction along a horizontal plane, and diffuses and transmits the modulated light having the changed optical path, and a ball lens that projects the light transmitted from the diffusion transmitter.