an integrated optic holographic spectrometer for analyzing electromagnetic radiation from a source is disclosed . the holographic spectrometer comprises a substrate having aperture for restricting the receipt of electromagnetic radiation . the spectrometer also includes two optical waveguides for dividing the electromagnetic radiation received through the aperture into at least a first and second portions . a geodesic lens is provided for collimating the first and second portions of the electromagnetic radiation . finally , the spectrometer includes a linear detector array optically communicating with the geodesic lens to provide an output responsive to the interference between the first and second portions of the electromagnetic radiation received through the aperture .