The principle used in most encoders (linear or rotational) is the same: an optical device. We shall study two types of rotational encoders briefly. Figure 3.12 shows an incremental encoder.
Amy McDougall/Barone (Monica Horan) becomes Robert Barone's second wife (in season 7), and is the best friend of Debra, who introduces her to Robert. A recurring character for the first seven seasons of the series, Amy became essentially a regular cast member for the remainder of the show's run.
Equally versatile on stage and screen, Amy Acker will soon be seen as Beatrice in the independent feature, Much Ado About Nothing, directed by Joss Whedon. A modern-day telling of Shakespeare's classic romantic comedy, Much Ado About Nothing is set to premiere at the 2012 Toronto International Film Festival.