The invention relates to an optical filter element (50) for devices (70) for converting spectral information into location information, using a connected detector (30) for detecting signals, said element having at least two microresonators (10, 11), a microresonator (10; 11) at least comprising - at least two superposed reflective layer structures (4, 6; 8, 9) which consist at least of a material layer (2) having a high refractive index and a material layer (3) having a low refractive index in an alternating sequence, as well as - at least one superposed resonance layer (5; 7) which is arranged between said two superposed reflective layer structures (4, 6; 8, 9). The filter element (50) comprises at least one transparent plane-parallel substrate (1) for optically decoupling said two microresonators (10, 11), the first microresonator (10; 11) being located on a first of the two opposing surfaces (51; 52) of said substrate (1), and the second microresonator (11; 10) being located on said substrate (1) on a second surface (54) thereof (1) that lies opposite the first surface (51), the resonance layer (5; 7) of at least one microresonator (10; 11), and/or the reflective layer structure (4, 6; 8, 9) that surrounds said resonance layer (5; 7), having a layer thickness which can vary along a horizontal axis (25) of said filter element (50).