期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 83, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3673001
关键词
-
资金
- Physikalisch-Technische Bundesanstalt
- Deutscher Akademischer Austauschdienst (DAAD) [ID50148561]
- Academia Sinica
- National Science Council, Taiwan [NSC95 -3114- P- 001-008-MY3]
In this work, an anti-drift and auto-alignment mechanism is applied to an astigmatic detection system (ADS)-based atomic force microscope (AFM) for drift compensation and cantilever alignment. The optical path of the ADS adopts a commercial digital versatile disc (DVD) optical head using the astigmatic focus error signal. The ADS-based astigmatic AFM is lightweight, compact size, low priced, and easy to use. Furthermore, the optical head is capable of measuring sub-atomic displacements of high-frequency AFM probes with a sub-micron laser spot (similar to 570 nm, FWHM) and a high-working bandwidth (80 MHz). Nevertheless, conventional DVD optical heads suffer from signal drift problems. In a previous setup, signal drifts of even thousands of nanometers had been measured. With the anti-drift and auto-alignment mechanism, the signal drift is compensated by actuating a voice coil motor of the DVD optical head. A nearly zero signal drift was achieved. Additional benefits of this mechanism are automatic cantilever alignment and simplified design. (C) 2012 American Institute of Physics. [doi:10.1063/1.3673001]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据