Implementation of an adaptive-optics assisted isoSTED nanoscope

Area of Science:

• Optics and Photonics
• Microscopy
• Biotechnology

Background:

• Stimulated emission depletion (STED) nanoscopy offers advanced optical resolution.
• Achieving the highest 3D resolution requires a 4Pi interferometer setup.
• Existing protocols for constructing such advanced microscopes are limited.

Purpose of the Study:

• To provide a detailed protocol for building and aligning a 4Pi-STED nanoscope, termed an isoSTED nanoscope.
• To guide researchers in assembling optomechanical components and configuring control systems.
• To enable the creation of advanced microscopy tools for biological imaging.

Main Methods:

• Detailed assembly instructions for optomechanical components.
• Guidance on configuring electronic and control systems.
• Step-by-step optical beam path alignment and performance assessment procedures.
• Integration of adaptive optics (AO) for enhanced performance.

Main Results:

• A comprehensive protocol for constructing an isoSTED nanoscope in approximately 12 months.
• Successful alignment and calibration of the 4Pi-STED system.
• Demonstration of achieving isotropic sub-50-nm resolution in 3D.
• Imaging capability in thick biological samples up to 35 µm depth.

Conclusions:

• The developed protocol enables the construction of a high-performance isoSTED nanoscope.
• This instrument facilitates advanced 3D biological imaging with unprecedented resolution.
• The protocol is suitable for researchers with expertise in optical instrument construction.