Abstract: A method of assembling a torque sensor includes the steps of fixing a first inner coil portion at one end side of a torsion bar, fixing a second inner coil portion at an other end side of the torsion bar, measuring an angle difference between an angle of the first inner coil portion and an angle of the second inner coil portion, fixing a first outer coil portion and a second outer coil portion, of which angle difference is substantially equivalent to the measured angle difference between the first inner coil portion and the second inner coil portion, at a housing, and rotatably disposing the torsion bar fixed with the first inner coil portion and the second inner coil portion in the housing.

Abstract: A method of assembling a torque sensor includes the steps of fixing a first inner coil portion at one end side of a torsion bar, fixing a second inner coil portion at an other end side of the torsion bar, measuring an angle difference between an angle of the first inner coil portion and an angle of the second inner coil portion, fixing a first outer coil portion and a second outer coil portion, of which angle difference is substantially equivalent to the measured angle difference between the first inner coil portion and the second inner coil portion, at a housing, and rotatably disposing the torsion bar fixed with the first inner coil portion and the second inner coil portion in the housing.

Abstract: For the purpose of detecting a geometric distortion of an image on a screen of a CRT display device, i.e., the deviation of the positional coordinates at a high speed and with a high accuracy, the positions of window images having about 10 rows and 10 columns which are arranged in a matrix on the screen of the display device, including a screen frame, are photographed through a predetermined low-pass filter by a monochromatic CCD camera, and further, both the low-light field picture and the high-light field picture are photographed, whereby the positions of the window images can be detected with a high accuracy within 0.1 CCD pixel by the elimination of a dark current, the normalization of detection sensitivity and the interpolation calculation. Therefore, the detection of the geometric distortion can be performed at a high speed and with a high accuracy by an inexpensive monochromatic CCD camera which has the number of pixels less than the total number of pixels of the display device.