A holographic optical tweezers module for the International Space Station
Janelle C Shane, Roylyn Serati, Hugh J. Masterson, Steve Serati

TL;DR
This paper presents a holographic optical tweezers module designed for the ISS, enabling active 3D control of particles in microgravity for advanced colloidal and biological experiments.
Contribution
It introduces a specialized HOT module adapted for microgravity, with remote operation and upgrade capabilities for ISS research applications.
Findings
Designed for high-vibration, microgravity environment
Enables active 3D particle control and repeatable experiments
Supports remote operation and software upgrades
Abstract
The International Space Station (ISS) is an unparalleled laboratory for studying colloidal suspensions in microgravity. The first colloidal experiments on the ISS involved passive observation of suspended particles, and current experiments are now capable of observation under controlled environmental conditions; for example, under heating or under externally applied magnetic or electric fields. Here, we describe the design of a holographic optical tweezers (HOT) module for the ISS, with the goal of giving ISS researchers the ability to actively control 3D arrangements of particles, allowing them to initialize and perform repeatable experiments. We discuss the design's modifications to the basic HOT module hardware to allow for operation in a high-vibration, microgravity environment. We also discuss the module's planned particle tracking and routing capabilities, which will enable the…
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