Light Pipe Microscope Tapered Guide for Large-Scale Imaging
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Solution Overview
Problem
Current multi-photon microscopy systems are limited by their spatial scale, making it difficult to image coordinated neuronal activities across multiple regions of the mammalian brain, which is essential for understanding neurological disorders, due to cumbersome designs that restrict large-scale and deep-tissue imaging capabilities.
Innovation Solution
The development of light pipe microscopes (LPMs) that utilize a compact, total internal reflection-based design with a glass light guide and dichroic beam splitter to enable high-efficiency signal collection over large areas, allowing for densely packed imaging arrays that can cover entire curved brain surfaces with high-throughput and cellular resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional multi-photon microscopy systems are used, then deep-tissue imaging capability is achieved, but spatial scale is limited and device complexity increases
Solution Approach 1:
The system divides the imaging function into multiple independent light pipe microscopes that can be densely packed and simultaneously imaging multiple regions. Each light pipe microscope is a simplified unit that can be independently positioned and operated, allowing the system to cover large spatial scales by combining multiple units rather than relying on a single complex system.
Solution Approach 2:
The patent replaces conventional mechanical microscope systems with a light pipe-based optical system. The light guide uses total internal reflection to transmit light, eliminating the need for complex mechanical scanning and positioning mechanisms, thereby reducing device complexity while maintaining deep-tissue imaging capability.
2Reliability
If conventional microscope designs are used, then imaging capability is maintained, but device size increases and physical footprint is large
Solution Approach 1:
The light pipe microscope design allows for compact nesting of optical components. The light guide is formed within a compact structure that can be densely packed with other light pipe microscopes, creating a space-efficient imaging system that maintains full imaging capability while significantly reducing the physical footprint.
Solution Approach 2:
The system transitions from traditional three-dimensional mechanical scanning to a planar array of densely packed light pipe microscopes. This dimensional change allows multiple imaging units to be arranged in a compact two-dimensional array that can simultaneously image multiple regions, reducing the overall physical size while maintaining imaging capability.
3Area of stationary object
If light pipe microscopes are densely packed, then large-scale imaging coverage is achieved, but signal collection efficiency must be maintained
Solution Approach 1:
Each light pipe microscope in the array is designed with optimized local optical properties, including tailored light guide geometries and dichroic beam splitter configurations, to maximize signal collection efficiency for its specific imaging region. This local optimization ensures that even when densely packed, each unit maintains high signal collection efficiency.
Solution Approach 2:
The dichroic beam splitter acts as an intermediary optical element that efficiently separates excitation light from emitted fluorescence signals. This intermediary component is strategically positioned to maximize signal collection while minimizing optical losses, thereby maintaining high signal collection efficiency even in densely packed configurations.
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
LPMs provide unparalleled signal collection efficiency and seamless imaging coverage across large spatial scales, overcoming the limitations of conventional microscopes by maintaining high image quality and depth penetration while significantly reducing the physical size of the imaging hardware, enabling comprehensive studies of neuronal and other complex biological systems.
Implementation Method 1
a compact, total internal reflection-based design with a glass light guide
Implementation Method 2
a dichroic beam splitter positioned between the first portion and the second portion of the light guide
Data Source
AI summary
An apparatus for large-scale dynamic imaging of a sample is described. The apparatus includes an optical detector, a light guide, a dichroic beam splitter, and a light source. The light guide includes a first portion and a second portion. The second defines a tapered shape such that a first diameter defined by a distal end of the second portion is smaller than a second diameter defined by a proximal end of the second portion. The dichroic beam splitter is positioned between the first portion and the second portion of the light guide. The light source is configured to direct a light beam through an external surface of the dichroic beam splitter. The dichroic beam splitter is configured to direct the light beam toward the second open end of the light guide and transfer the return emitted signal through the light guide to the optical detector.