EOS400 ultrasonic shaker different from Oly's??

Started Aug 24, 2006 | Discussions thread
Shop cameras & lenses ▾
ForumParentFirstPreviousNextNext unread
Flat view
laurie knight
Forum MemberPosts: 95
EOS400 ultrasonic shaker different from Oly's??
Aug 24, 2006

Its common knowledge (here at least) that Olympus patented the whole ultrasonic shaky dust remover thing...

Having read some stuff about the new EOS 400 XT from Canon with ultrasonic dust shaker, it sounds like exactly the same system as Olympus.

Apparently there is a low pass filter in front of sensor which is shaken by an ultrasonic motor, this shakes loose dust from filter onto sticky pad around lens mount...

How does this not infringe on Olympus' patent? I cannot believe Oly have licensed this technology to Canon. Any thoughts?

Quote from Steve's Digicams:-

Still, recognizing that humidity and a variety of real world conditions can cause dust to enter and adhere to the sensor or low pass filter despite the most scrupulous of efforts, Canon created the Self Cleaning Sensor Unit. The low pass filter on the front of the CMOS sensor is attached to an ultrasonic vibrating unit that literally shakes the loose dust particles off of the surface. The newly liberated dust is then captured by an adhesive material that keeps the particles from becoming airborne again once the camera moves.

The self cleaning sensor unit’s ultrasonic anti-dust shake activates automatically for one second whenever the camera is powered on or off, ensuring that the camera will be as relatively dust free as possible and can be activated at other times through a simple menu selection.

ForumParentFirstPreviousNextNext unread
Flat view
Post (hide subjects)Posted by
ForumParentFirstPreviousNextNext unread
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow