ZOOM OPTICAL SYSTEM
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United States of America Patent
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Issued Date -
Oct 1, 2009
app pub date -
Jan 4, 2005
filing date -
Jan 7, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A zoom optical system is provided which has a lens system which comprises a first lens which is arranged to provide a continuously variable focus for a beam of radiation. The lens system further comprises a switchable optical element including a first fluid, a second fluid and a wavefront modifier having a part through which said radiation beam is arranged to pass. In a first mode the switchable optical element has a first fluid configuration with said part being substantially covered by the first fluid, and in a second mode the switchable optical element has a second, different, fluid configuration with said part being substantially covered by the second fluid.
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