namesmor.blogg.se - Images of a mouse

The holes in the disk break the beam of light coming from the LED so that the infrared sensor sees pulses of light.

On either side of the disk there is an infrared LED and an infrared sensor.

The following image shows the disk: A typical optical encoding disk: This disk has 36 holes around its outer edge. When a roller rolls, its shaft and disk spin.

The rollers each connect to a shaft, and the shaft spins a disk with holes in it.

The following image shows the two white rollers on this mouse: The rollers that touch the ball and detect X and Y motion

When the ball rotates, one or both of these rollers rotate as well. One of the rollers is oriented so that it detects motion in the X direction, and the other is oriented 90 degrees to the first roller so it detects motion in the Y direction.

Two rollers inside the mouse touch the ball.

The underside of the mouse's logic board: The exposed portion of the ball touches the desktop.

A ball inside the mouse touches the desktop and rolls when the mouse moves.