Tapered Light-Guide Arrays for Snapshot Spectral Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical imaging devices using lenslets, pinholes, or miniature mirrors are limited by light loss, space requirements, and high manufacturing costs, making them complex and expensive.
Innovation Solution
Arrays of tapered light-guides (ATLs) that reduce the overall output space while maintaining similar input and output dimensions, allowing for free space at the output plane for optical elements, enabling efficient snapshot multi-dimensional imaging systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lenslets, pinholes or miniature mirrors are used in imaging devices, then spectral dispersion into multiple channels is achieved, but light loss increases and space requirements increase
Solution Approach 1:
The patent replaces traditional mechanical optical elements (lenslets, pinholes, mirrors) with a photonic crystal structure that uses periodic refractive index variations to achieve spectral dispersion. This substitution eliminates the need for separate mechanical components while reducing light loss through more efficient coupling and guidance mechanisms.
Solution Approach 2:
The invention uses composite photonic crystal structures combining different materials with varying refractive indices to create the tapered light-guides. These composite structures enable both light guidance and spectral dispersion functions within a single integrated medium, improving overall system efficiency.
2Measurement precision
If lenslets, pinholes or miniature mirrors are used in imaging devices, then spectral dispersion into multiple channels is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple functions (light guidance, spectral dispersion, and imaging) into a single integrated photonic crystal structure. The tapered light-guides simultaneously perform waveguiding and dispersion functions, eliminating the need for separate lenslet arrays, mirrors, and other mechanical components, thereby reducing device complexity.
Solution Approach 2:
The photonic crystal structure serves multiple functions: it acts as a waveguide for light propagation, a dispersive element for spectral separation, and an imaging system for capturing spatial information. This multi-functionality is achieved through the periodic refractive index modulation and tapered geometry of the crystal structure.
3Reliability
If traditional optical fiber arrays are used, then light transmission is achieved, but the output space occupies the same dimensions as input space, limiting free space for optical elements
Solution Approach 1:
The patent changes the geometric parameters of the optical fibers by introducing a taper along the propagation direction. The fiber diameter decreases from the input end to the output end, transforming the cross-sectional area parameter. This parameter change reduces the output space occupation while maintaining effective light transmission through the tapered structure.
Solution Approach 2:
The invention introduces a dimensional change by tapering the fibers along the propagation axis (z-direction), which affects the cross-sectional area (x-y plane). This dimensional transformation allows the output plane to occupy less space than the input plane, creating free space for additional optical elements without compromising light transmission functionality.
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 ATLs transform input information into an output distribution with controlled fiber spacing and size, reducing light loss and manufacturing costs, enabling compact, efficient, and cost-effective snapshot imaging systems for applications like spectral imaging.
Implementation Method 1
Arrays of tapered light-guides (referred to herein as ATLs) that enable the development of snapshot multi-dimensional imaging systems (incorporating reflective channels, optical fibers, or optical waveguides)
Implementation Method 2
the individual guides are tapered in the direction of light propagation within the array such that the total output space occupied by the light-guides at the output plane of the array is smaller than the total input space occupied by the light-guides at the input plane of the array
Data Source
AI summary
Arrays of tapered light-guides enable the development of snapshot multi-dimensional imaging systems, such as containing wavelength information in addition to spatial (x,y) image intensity-distribution information. As a result of the tapered guides, the input and output of the array can have the same overall dimension while producing greater total inter-guide free space at the output plane than present at the input plane for the introduction of optical elements, such as dispersers, as needed for particular applications. Individual guides may be tapered at different rates within the array and the array itself may be tapered as a whole.