UC Berkeley Unveils Laser Microscope for Cellular Imaging — SkimNews
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- University of California - Berkeley researchers created a laser phase plate that improves electron microscopy by increasing image contrast through phase manipulation of the electron beam, allowing clearer views of tiny cellular structures.
- Holger Müller led the development of a new microscope called Theia, which combines advanced electron optics with a high-intensity laser to achieve what he describes as potentially the world’s best resolution for biological imaging.
- Bridget Carragher is directing construction of a two-laser microscope at Biohub, based on Müller’s theoretical work, aiming to reduce optical distortions while maintaining high contrast for cryo-ET imaging.
- Theia uses the world’s most intense focused continuous-wave laser—75 kilowatts concentrated into a few microns—to shift the phase of electrons by 90 degrees, dramatically improving signal-to-noise ratio in cryo-EM.
- Cryo-ET could gain the most from this technology, as it currently struggles to image small proteins in crowded cellular environments; the laser phase plate promises to enhance contrast in 3D reconstructions of molecules in their natural context.
- Thermo Fisher Scientific is collaborating with both the Berkeley and Biohub teams, indicating industry engagement in advancing next-generation cryo-EM instrumentation.
Why it matters: Scientists studying molecular mechanisms of disease could now visualize proteins as small as one-third the size detectable by current cryo-EM, accelerating structural biology and drug discovery. The leap in imaging clarity reduces reliance on inference, making direct observation of cellular machinery feasible for the first time at this scale.
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