Photocopying – Projection printing and copying cameras – Illumination systems or details
Reexamination Certificate
2007-03-27
2007-03-27
Nguyen, Henry Hung (Department: 2851)
Photocopying
Projection printing and copying cameras
Illumination systems or details
C355S069000
Reexamination Certificate
active
10888284
ABSTRACT:
A lithography device including a first revolver, a second revolver and a driving device. The first revolver includes a transmittance control filter. The second revolver includes transmittance profile filter. The driving device is capable of rotating the second revolver. The first revolver is for positioning the at least one transmittance control filter in the light path. The second revolver is for positioning the at least one transmittance profile filters in the light path.
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Kim Young-Hee
Park Young-Ho
Won Yoo-Keun
Marger & Johnson & McCollom, P.C.
Nguyen Henry Hung
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