The present invention, support for the sample (102) (18) relates to spectroscopic apparatus comprising a light source arranged to generate light profile (110) to the sample (102). Support portion (102) and the light source, the light profile (110) is arranged to be movable relative to the sample (102). Spectrometer, the light input section for receiving the light generated by the interaction between light and the sample from a light source (102) (16), the detector comprising a two-dimensional array of photodetectors element (104) (24), is disposed between the optical input detector (24), the optical input unit (16) by received the detection device light (24) distributed device for spectrally dispersing the spectral direction over (44), and the light disposed in the optical path between the input section (16) and the detector (24), a sample (102) for spectrum generated by a given point on a first portion of the spectrum (50A) and second each of the parts comprises as distributed across an optical detector elements of different rows or columns of the array (104), based on the wave number, optical splitter for splitting the light (38), the. The device, in synchronization with the relative movement between the optical profile (110) and the sample (102), in the spatial direction perpendicular to the spectral direction, the shifting of data between the light detector element (104) further comprising in order to control arranged controller (25). As a result, data for different sets of optical detector elements (104) relative detector during the movement (24), is accumulated in each of the first and second portions of the spectrum (50A, 50B) .