ISSN:
1349-9432
Keywords:
Si micromachining
;
pinhole
;
photodiode
;
shape memory alloy
;
spatial filter
;
automatic alignment
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The spatial filter of a Si micromachined pinhole integrated with photodiodes is fabricated. The photodiode cells placed around the center pinhole can detect the relative position between the incident beam spot and the pinhole. The position signal obtained from a two or four cell type photodiode and position sensitive detector show the sensitivity even when the beam spot is near the center pinhole. Combined with the feedback control of the shape memory alloy actuator based on the obtained position signal, the pinhole is aligned automatically.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10043-998-0115-8
