A spectrometer comprising: - a diffraction grating ; and - a resonant scanner drive system comprising: - a taut band having a first end and a second end, the taut band providing a rotational axis for the diffraction grating , wherein the diffraction grating is fastened at a first side of the taut band ; - a holding frame supporting the first end and the second end of the taut band ; - a permanent magnet fastened to a second side of the taut band and mounted with the magnetic pole axis normal to the plane of the diffraction grating ; - an electro-magnet at the second side of the taut band , wherein the scanning mirror is driven by the magnetic interaction between the permanent magnet and the electro-magnet , the electro-magnet having a C-shaped core with a winding wound around a center section of the C-shaped core and two pole-pieces, wherein a line between the two pole-pieces is perpendicular to the axis of the taut band ; and - a first and a second spacer , wherein the first spacer is provided between the diffraction grating and the taut band , wherein the second spacer is provided between the permanent magnet and the taut band . - a diffraction grating ; and - a resonant scanner drive system comprising: - a taut band having a first end and a second end, the taut band providing a rotational axis for the diffraction grating , wherein the diffraction grating is fastened at a first side of the taut band ; - a holding frame supporting the first end and the second end of the taut band ; - a permanent magnet fastened to a second side of the taut band and mounted with the magnetic pole axis normal to the plane of the diffraction grating ; - an electro-magnet at the second side of the taut band , wherein the scanning mirror is driven by the magnetic interaction between the permanent magnet and the electro-magnet , the electro-magnet having a C-shaped core with a winding wound around a center section of the C-shaped core and two pole-pieces, wherein a line between the two pole-pieces is perpendicular to the axis of the taut band ; and - a first and a second spacer , wherein the first spacer is provided between the diffraction grating and the taut band , wherein the second spacer is provided between the permanent magnet and the taut band . - a taut band having a first end and a second end, the taut band providing a rotational axis for the diffraction grating , wherein the diffraction grating is fastened at a first side of the taut band ; - a holding frame supporting the first end and the second end of the taut band ; - a permanent magnet fastened to a second side of the taut band and mounted with the magnetic pole axis normal to the plane of the diffraction grating ; - an electro-magnet at the second side of the taut band , wherein the scanning mirror is driven by the magnetic interaction between the permanent magnet and the electro-magnet , the electro-magnet having a C-shaped core with a winding wound around a center section of the C-shaped core and two pole-pieces, wherein a line between the two pole-pieces is perpendicular to the axis of the taut band ; and - a first and a second spacer , wherein the first spacer is provided between the diffraction grating and the taut band , wherein the second spacer is provided between the permanent magnet and the taut band . <EOS>