G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 26/00 (2006.01) G01J 3/06 (2006.01) G01J 3/12 (2006.01) G02B 5/20 (2006.01)
Patent
CA 2269011
A monochromator according to the present invention has an arm 1 rotatably mounted on a rotation shaft 3, and a diffraction grating 6 is fixed to the arm 1. The arm 1 is rotated by a linear motor 9 including a moving part 91 fixed to the arm 1 and a stator part 92 fixed to a base 2. The linear motor 9 is a voice-coil linear motor constructed to allow the arm 1 to rotate reciprocatively around the rotation shaft 3 within a preset angular range. The absolute rotational position of the arm 1 is detected by a rotary encoder 7 including a crossbar 71 fixed to the arm 1 and a encoder block 72 fixed to the base 2. Based on the output signal of the rotary encoder 7, the linear motor 9 is controlled so that the moving part 92 rotates at a fixed angular speed around the rotation axis 3. Thus, the wavelength scanning is carried out at high speed, and sampling of monochromatic light having desired wavelengths is performed accurately.
Goudreau Gage Dubuc
Shimadzu Corporation
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