Method and a Device for Acquiring an Image Having Two-Dimensional Spatial Resolution and Spectral Resolution

A method for acquiring an image having two-dimensional spatial resolution and spectral resolution, the method comprising:

• acquiring a frame using rows of photo-sensitive areas on at least one sensor surface, which at least one sensor surface is arranged in relation to at least one optical system in an image plane defined by the at least one optical system, wherein the photo-sensitive areas are arranged to detect incident light from an object imaged by the at least one optical system onto the image plane and rows of photo-sensitive areas are arranged to receive different wavelengths of light;
• moving the at least one sensor surface in the image plane in a direction perpendicular to a longitudinal direction of the rows of photo-sensitive areas;
• repeating the acquiring for acquiring a plurality of frames using different positions of the at least one sensor surface in relation to the at least one optical system for recording different spectral information for respective positions on the object;
• and
• combining information from the plurality of frames to:
• form multiple channels of an image, wherein each channel is formed based on detected light in respective rows of photo-sensitive areas;
• and
• represent a two-dimensional image of the object for a different wavelength.