The present invention provides an imageable element, which includes: a substrate; a crosslinked layer disposed on the substrate; and an imageable ink-receptive layer disposed on the crosslinked layer, the imageable ink-receptive layer including an ablation free imageable composition. A sample containing a protein or peptide of interest is prepared for mass spectroscopy analysis. In one group, the optics include matched gratings which are positioned along the optical path outside of the interferometer optics to produce first and second sets of spectrally dispersed beams. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis.