Patent ID: 7248037
Filing Date: 2007-07-24
Classification: G01D,G02B,G03B,H04N

Abstract:
1. A position detector comprising: a magnetic-sensor pair including magnetic sensors spaced from each other; a magnetic force generator; and a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along a first axis along which a first space between said magnetic sensors extends is equal to or larger than a length of said first space along said first axis, wherein said controller detects a difference in magnitude between said output values of said magnetic sensors, as a position output, and said length of said magnetic force generator along said first axis is determined so that an evaluation value for evaluating linearity of a curve representing change in said difference which is responsive to positional change of said magnetic force generator meets a predetermined standard.