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DSLR dust reduction air channelling system Disclosure Number: IPCOM000230634D
Publication Date: 2013-Aug-28
Document File: 2 page(s) / 50K

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The Prior Art Database


Dust on DSLR (digital single lens reflex) camera sensors can cause problems, by blocking photosites. As such, solutions to this problem have been sought. A solution proposed in this article is to use an airfoil, connected to the underside of the mirror, to channel a thin film of air onto the sensor. By scooping the air towards the sensor (increasing pressure by forcing it through a laser cut thin channel), dust can be blown off the sensor. This will happen at each shutter actuation, and not simply when the camera is switched on or off.

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Page 01 of 2

DSLR dust reduction air channelling system

Dust on DSLR camera sensors is a problem. Current solutions are costly, involving electrostatic or ultrasonic vibration systems.

    The proposed system is very cheap to make, providing some reduction in sensor dust particles in return.

An aerodynamic element (the subject of this article) is fitted to the rear of the

mirror. When a shutter actuation occurs, the mirror is flipped up so that the light path hits the sensor (see Fig. 3). The aerodynamic element serves to channel air towards the sensor, which will blow loose dust off the sensor. Much larger area of incoming channel to outgoing channel (laser cut), would provide enough pressure to

channel the air out, over the sensor. As with existing implementations, a sticky material is used at the base of the sensor to collect this dust, and prevent it causing further problems.

    Existing systems function either on camera startup or shutdown. The proposed system functions at every shutter actuation.

Page 02 of 2

    When a shutter actuation occurs, the mirror (2) is rotated very quickly in a clockwise direction around its hinge (3). Once a suitable amount of time has elapsed to produce the desired exposure on the sensor (5), the mirror is then quickly flipped down. During both of these movements, an aerodynamic device (4, the subject of this disclosure) is used to channel a thin film of air towards the sensor, where it

blows in a d...