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Canon patent software reveals shutter-like barrier mechanism for shielding mirrorless picture sensors: Digital Images Assessment


Left: The barrier mechanism when it is closed; Proper: The barrier mechanism when it is open.

Canon has filed a brand new patent software for an in-camera mechanism designed to guard the shutter and picture sensor of its mirrorless cameras from mud and particles when no lens is hooked up.

Japanese patent software quantity 2019–234718 describes (machine-translated) an ‘invention associated to interchangeable lens imaging tools with a barrier mechanism to guard the imaging component.’

What’s fascinating in regards to the mechanism described within the patent textual content is that it’s solely passive. As an alternative of being powered by a motor, the mechanism mechanically opens when a lens is twisted into the lens mount and closes because the lens is faraway from the lens mount, due to an array of built-in levers and is derived.

As a lens (or physique cap) is screwed onto the digicam’s bayonet mount, the barrier mechanism opens as much as create a transparent path to the picture sensor.

In concept, such a design ought to assist to maintain prices down and scale back potential factors of failure, because it received’t require a further motor or energy of any variety. The patent suggests this mechanism would sit behind the body of the lens mount, between {the electrical} contacts and the place the picture sensor is positioned.

The patent doesn’t point out what sort of materials the boundaries can be made out of, however the illustrations do seem to counsel the barrier parts are extra sturdy than what you’ll see with a normal shutter.

An exploded view of the parts used to create the barrier mechanism.

As at all times with patents, there’s no figuring out whether or not or not it will ever come to fruition, but it surely is sensible as Canon and others proceed to develop their respective mirrorless digicam lineups. In comparison with DSLR cameras, mirrorless cameras expose the picture sensor extra and whereas some have a characteristic that closes the shutter to guard the picture sensor when a lens is eliminated, this passive methodology wouldn’t depend on batteries, motors and software program to maintain the picture sensor secure.

Moreover, if world shutters turn into extra commonplace on bigger picture sensors, this might very nicely be an answer to preserving the picture sensor secure if there’s no bodily shutter contained in the digicam.

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