Performance of varifocal lenses using KTa sub( 1 - x)Nb sub( x)O sub( 3) crystals with response times faster than 2 mu s

A varifocal lens made of a single crystal of potassium tantalite niobate is characterised by its fast responses and large apertures. This article presetented a report on the focus shift performance of this varifocal lens with response times of < 2 mu s. To investigate this quick response, a strob...

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Bibliographic Details
Published in:Electronics letters 2013-11, Vol.49 (23), p.1470-1470
Main Authors: Imai, T, Takayama, Y, Miyazu, J, Kobayashi, J
Format: Article
Language:English
Subjects:
Apertures
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Summary:A varifocal lens made of a single crystal of potassium tantalite niobate is characterised by its fast responses and large apertures. This article presetented a report on the focus shift performance of this varifocal lens with response times of < 2 mu s. To investigate this quick response, a strobe technique was introduced. It was confirmed that the KTN lens changed its lens power in 2 mu s as predicted by the theory stating that the lens power is proportional to the square of the applied voltage. The lens power can be controlled from 0 m super( -1) to 0.8 m super( -1) at a wavelength of 1.06 mu m.
ISSN:0013-5194
1350-911X