Patent ID: 7283233

Claim:
A spectrometer suitable for analyzing a spectra composition of an optical beam, the spectrometer enabling a detection of light of a particular wavelength, the spectrometer comprising: a. an entrance slit for allowing an entry of the optical beam into the spectrometer, a location of the entrance slit being adjustable for controlling a performance of the spectrometer; b. a detector for detecting the optical beam, a location of the detector being adjustable for controlling a performance of the spectrometer; and c. a curved grating for analyzing the spectra composition of the optical beam, the curved grating comprising a plurality of grooves, a distance between the grooves being dependent on the location of the entrance slit and the detector, a center of operation wavelength, the diffraction order, a refractive index of the medium and on the location of the adjacent grooves, such that a path difference between two adjacent grooves is an integral of the center of operation wavelength, wherein an arc length of each of the grooves is the same.