Image recording apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 19, 2009
Grant Date -
Oct 26, 2006
app pub date -
Apr 20, 2006
filing date -
Apr 20, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A projection optical system has first to fourth lens groups (51) to (54) provided in this order from a SLM, a mirror (32) having an opening is provided between the first lens group (51) and the second lens group (52), and an aperture plate (132) is provided between the third lens group (53) and the fourth lens group (54). Zeroth order light which is signal light from the SLM passes through each opening of the mirror (32) and the aperture plate (132) to be guided to a recording medium, and a part of first order diffracted light is reflected by the mirror (32) to be guided outside and received by an external light-block water-cooling jacket. The rest of the first order diffracted light is blocked by the aperture plate (132), and heat generated by light blocking is removed by a cooling mechanism connected to the aperture plate (132).
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