Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2011-06-07
2011-06-07
Allen, Stephone B (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S205100, C250S227260
Reexamination Certificate
active
07957047
ABSTRACT:
A laser projection device includes: an incidence optical system condensing laser light, a scanning device deflect the laser light in a first scanning direction and a second scanning direction with a mirror, and a projection optical system guiding the deflected light to a surface to be scanned. The scanning device performs the deflection in the first scanning direction by resonant driving and performs the deflection in the second scanning direction by non-resonant driving. The incidence optical system has different optical powers in the first scanning direction and the second scanning direction, and makes light incident on the scanning device in a convergent state in the first scanning direction and in a substantially parallel light state in the second scanning direction. The projection optical system has a negative optical power in the first scanning direction.
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Allen Stephone B
Doak Jennifer L.
Konica Minolta Opto Inc.
Sidley Austin LLP
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