Optical: systems and elements – Light control by opaque element or medium movable in or... – With relative motion of two apertured elements
Reexamination Certificate
2005-02-01
2005-02-01
Robinson, Mark A. (Department: 2872)
Optical: systems and elements
Light control by opaque element or medium movable in or...
With relative motion of two apertured elements
C352S215000, C396S471000, C396S495000
Reexamination Certificate
active
06850351
ABSTRACT:
An apparatus and method for extremely fast opening and closing of an exposure path or optical axis. Two disk-shaped shutters are coaxially rotated in opposite directions at an initial synchronous speed so as to dynamically align openings in the discs at an angular position offset from the exposure path. The angular speeds of two of the disks are selectively increased and decreased to dynamically align the openings with the exposure path. A third masking disk may be provided, which rotates coaxially with the other two at a constant angular speed less than the angular speeds of the other two disks, to permit the invention to rapidly open and close two or more separate optical paths.
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Baker Rod D.
Peacock Myers & Adams P.C.
Robinson Mark A.
Team Specialty Products Corp.
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