Holographic 3D Multi-Spot Light Stimulation for Optogenetics
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Solution Overview
Problem
Current optogenetics techniques face limitations in accurately stimulating cells distributed in three dimensions due to two-dimensional illumination, which restricts the ability to perform high-speed, millisecond-accurate illumination and stimulation of multiple cells simultaneously.
Innovation Solution
A holographic three-dimensional multi-spot light stimulation device that uses three-dimensional fluorescence distribution information to rapidly sense and stimulate multiple cells by forming light spots in space, employing a combination of three-dimensional imaging and light stimulation holographic optical systems with spatial light modulators and control units to apply light stimulation based on acquired fluorescence data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional illumination is used for optogenetics stimulation, then the device structure is simple, but the ability to stimulate multiple cells simultaneously in three dimensions is limited
Solution Approach 1:
The patent transitions from two-dimensional illumination to three-dimensional optical manipulation by introducing axial (depth) control through holographic optical tweezers. The system uses spatial light modulators to create focused light spots at different depths along the optical axis, enabling simultaneous stimulation of cells distributed in three-dimensional space rather than limited to a single focal plane.
Solution Approach 2:
The illumination is segmented into multiple independent focal spots that can be positioned at different three-dimensional locations. The holographic optical system divides the light beam into multiple focused spots, each capable of stimulating individual cells or small groups of cells at specific positions, allowing parallel stimulation of multiple cells simultaneously.
2Ease of operation
If conventional illumination methods are used, then the system is simple to operate, but millisecond-accurate illumination and stimulation of multiple cells cannot be achieved
Solution Approach 1:
The system incorporates real-time feedback by capturing fluorescence images of the cells and using this information to dynamically adjust the positions and intensities of the optical traps. The control unit processes the fluorescence distribution information and updates the holographic pattern to maintain precise stimulation, enabling closed-loop control for millisecond-accurate manipulation.
Solution Approach 2:
The system transitions from static illumination to dynamic control by enabling real-time repositioning of multiple focal spots. The spatial light modulators can rapidly change the positions, numbers, and intensities of focused light spots in response to cell movements or experimental requirements, providing dynamic and adaptive stimulation capabilities.
3Productivity
If three-dimensional fluorescence distribution information is acquired and used for multi-spot light stimulation, then simultaneous stimulation of multiple cells in 3D is enabled, but the device complexity increases
Solution Approach 1:
The system combines multiple functions into a single integrated platform: the same holographic optical system and spatial light modulators are used for both three-dimensional imaging (acquiring fluorescence distribution) and three-dimensional stimulation (creating light spots). This multi-functionality reduces the need for separate independent systems and enables coordinated observation and manipulation.
Solution Approach 2:
The patent merges the imaging system and stimulation system into a unified configuration. The fluorescence microscopy system and optical tweezers system share common optical components including objectives, spatial light modulators, and control units, allowing simultaneous acquisition of three-dimensional fluorescence information and application of multi-spot light stimulation.
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 high-speed sensing and simultaneous light stimulation of multiple cells in three dimensions, allowing for precise observation and control of cell states post-stimulation, enhancing the capability for optogenetics research and applications.
Implementation Method 1
a three-dimensional light stimulation holographic optical system which employs a light stimulation hologram generated on the basis of the acquired three-dimensional fluorescence distribution information to form a plurality of light spots in space
Implementation Method 2
employing a combination of three-dimensional imaging and light stimulation holographic optical systems with spatial light modulators
Implementation Method 3
irradiating a plurality of stimulation objects with fluorescence excitation light
Implementation Method 4
acquire three-dimensional fluorescence distribution information resulting from fluorescent signal light from a plurality of stimulation target objects
Data Source
AI summary
A holographic three-dimensional multi-spot light stimulation device is provided with: a three-dimensional imaging holographic optical system A which employs fluorescent exciting light to acquire three-dimensional fluorescence distribution information resulting from fluorescent signal light from a plurality of stimulation target objects; and a three-dimensional light stimulation holographic optical system B which employs a light stimulation hologram generated on the basis of the acquired three-dimensional fluorescence distribution information to form a plurality of light spots in space, to impart stimulation simultaneously to the plurality of stimulation target objects. Furthermore, the three-dimensional light stimulation holographic optical system B is provided with a spatial light phase modulating element 22 and a control unit 25, wherein the control unit 25 generates the light stimulation hologram by controlling the spatial light phase modulating element 22 on the basis of the three-dimensional fluorescence distribution information.