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Related Experiment Video

Updated: May 8, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Shaped electrodes for adaptive X-ray optics.

Kenneth A Goldberg¹, Francesco Marzari¹, Grant D Cutler¹

¹Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Journal of Synchrotron Radiation

|May 7, 2026

Summary

This summary is machine-generated.

Lithium niobate mirrors can be shaped into various optical surfaces using electric fields. This novel method offers precise control for adaptive X-ray optics without hysteresis or drift.

Keywords:

X-ray mirror adaptive optics focusing lithium niobate wavefront

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Area of Science:

Materials Science
Optics
Physics

Background:

Lithium niobate is a promising substrate for adaptive X-ray mirrors.
Ferroelectric domain inversion via heat treatment creates bimorph properties.
This material offers favorable actuation and shape-control without hysteresis, creep, or drift.

Purpose of the Study:

To derive an analytic description for shaping lithium niobate mirrors.
To demonstrate the control of surface curvature using applied electric fields.
To explore the potential for creating multiple mirror profiles from a single substrate.

Main Methods:

Timoshenko's bi-metallic strip thermostat approach was adapted.
Analytic modeling of electrode width for surface curvature.
Finite-element analysis for validation.
Fabrication and testing of electrode patterns.

Main Results:

An analytic method was derived to control surface curvature by varying electrode width.
Uniform electrodes produced cylindrical surfaces.
Varying electrodes generated plane-parabolic and plane-elliptical surfaces from flat substrates.
A compound electrode pattern was proposed for multiple profiles.

Conclusions:

Lithium niobate is a viable material for adaptive X-ray mirrors.
The derived analytic method enables precise, hysteresis-free mirror shaping.
The proposed electrode designs allow for versatile optical surface generation.