Projection objective with fixed focal length formed of several subassemblies for digital projection
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United States of America Patent
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Jun 9, 2009
Grant Date -
Jan 17, 2008
app pub date -
Jun 21, 2007
filing date -
Jun 22, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a projection objective with fixed focal length for digital projection, characterized by the following features: a first optical subassembly of several lenses seated in a first objective housing; a second optical subassembly of several lenses seated in a second objective housing; and a third objective housing that, in the region of one end, accepts the first objective housing, and in the region of the other end, accepts the second objective housing. Such an objective is designed to be structurally simple and makes possible a simple and precise assembly.
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