Photo-Stimulator Phase Modulation Timing Control
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Solution Overview
Problem
Existing photo-stimulation systems using LCOS-SLMs face challenges in stable light radiation during phase modulation, leading to unintended stimulation points due to the time required to switch phase modulation amounts, resulting in unstable light radiation.
Innovation Solution
A photo-stimulator system with a controller that synchronizes the switching of radiation on/off by the AOM with the phase modulation switching of the LCOS-SLM, turning off radiation before phase modulation starts and turning it on after completion, ensuring stable stimulation points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If phase modulation amount is switched during light radiation, then multiple stimulation points can be formed simultaneously, but unintended stimulation points occur due to switching time delays
Solution Approach 1:
The system performs preliminary actions by switching the phase modulation amount before turning on the light radiation. The controller is configured to switch the phase modulation amount of the stimulation light before turning on radiation of the stimulation light to the specimen, ensuring the phase pattern is ready before light is emitted. This prevents unintended stimulation points by eliminating the switching delay during active radiation.
2Productivity
If light radiation is continuous during phase modulation switching, then stimulation efficiency is maintained, but light radiation becomes unstable during switching transitions
Solution Approach 1:
The system performs the phase modulation switching in advance before light radiation begins, ensuring the phase pattern is fully established before light is emitted. This preliminary action maintains stimulation efficiency while ensuring stability during the actual radiation period, as no switching occurs during active light emission.
Solution Approach 2:
The system implements periodic cycles of phase modulation switching followed by light radiation periods. Each cycle consists of a switching phase (where phase modulation amount changes) followed by a radiation phase (where stable light is emitted). This periodic structure separates the unstable switching action from the stable radiation action, maintaining overall system productivity while ensuring radiation stability during emission.
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
This approach prevents unintended light radiation during phase modulation switching, allowing for simultaneous and precise stimulation of multiple points, enhancing the reliability of the photo-stimulation process.
Implementation Method 1
a switching part switching on/off of radiation of stimulation light to a specimen
Implementation Method 2
A phase modulation type spatial optical modulation element including an LCOS element can arbitrarily change phase distribution of light that is incident on a pupil of an objective lens
Data Source
AI summary
To avoid unstable light radiation during switching of a phase modulation amount and stimulate desired stimulation points simultaneously, provided is a photo-stimulator which includes an AOM switching on/off of radiation of stimulation light to a specimen S; an LCOS-SLM being capable of modulating a phase of stimulation light once radiation to the specimen S has been turned on by the AOM; and a controller controlling the LCOS-SLM to switch a phase modulation amount of stimulation light and controlling the AOM to switch on/off of radiation of stimulation light, wherein the controller causes the AOM to turn off radiation of stimulation light before the LCOS-SLM starts switching a phase modulation amount, and causes the AOM to turn on radiation of stimulation light after the LCOS-SLM completes switching a phase modulation amount.