Shape shifting mirror opens a vista for the future

Shape shifting mirror opens a vista for the future
Fig. 1. New glue-free deformable mirror. Credit: JTEC

A team of researchers from JTEC Corporation and Osaka University developed a bimorph deformable mirror that allows for precise shape modification and usage under vacuum, a world first.

Because piezo actuators and a mirror substrate in conventional deformable mirrors were bonded with epoxy glues, this caused problems such as organic gas emission in a chamber and denatured bonding materials due to chamber cleaning at . Thus, the use of a was performed only in ambient atmospheres.

The team led by Kazuo Yamauchi invented a method for bonding PZT actuators to a mirror substrate without using epoxy glues to develop a glue-free bimorph deformable mirror (Figure 1), allowing for usage of deformable mirrors under vacuum.

In this study, they developed a technique to bond PZT actuators to a mirror substrate by using inorganic silver nanoparticles (not containing organic matter). They confirmed that the emission rate of organic gas was at an acceptable level: the was not contaminated by the gas while maintaining the same level of operability as that of conventional mirrors.

They also confirmed that the bonding and bending characteristics were almost the same before and after heating at 200 degrees C, which is necessary for cleaning procedures. These results verified practical usage of this mirror under vacuum. (Figure 2)

Shape shifting mirror opens a vista for the future
Fig. 2. The bonding and bending characteristics are almost the same before and after heating at 200°C, showing no influence of heating on the characteristics. Credit: JTEC

This group's achievements will permit a maximal use of 100-1,000 times brighter X-rays provided by fourth-generation synchrotron radiation facilities than that of current third-generation facilities. This mirror will be used in X-ray experiments and soft X-ray systems, both of which need a high vacuum environment, for the fourth-generation large synchrotron radiation facilities in which precision optics under vacuum are indispensable.

"Our bimorph deformable mirror will be used in a variety of applications—not only for X-ray radiation systems, but also for controlling space telescopes and high intensity lasers," says first author Yoshio Ichii.

More information: Yoshio Ichii et al. Development of a glue-free bimorph mirror for use in vacuum chambers, Review of Scientific Instruments (2019). DOI: 10.1063/1.5066105

Journal information: Review of Scientific Instruments

Provided by Osaka University

Citation: Shape shifting mirror opens a vista for the future (2019, March 28) retrieved 22 April 2024 from
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Light, instead of electrodes, could control deformable mirrors


Feedback to editors