Figure 1

Full Spectrum Raman Spectroscopy Setup. Arrows show the intended path of light. White supercontinuum (SC) light is filtered (CF, ExF) and angularly color separated by a transmission grating (ExG, top beamline).The light is then focused by a microscope objective lens (ExL) into a color graded vertical line on the sample (S). This light is collected by a microscope objective lens (EmL), filtered (EmF) and diffracted angularly by a transmission grating (EmG) in horizontal plane. This is imaged by tube lens (TL) onto a multi-megapixel CMOS camera (C1). Beam dumps (BD1, BD2, BD3) collect unwanted light. A second camera (C2) is used to image the zero order (undiffracted) image. The inset shows a standard micro-Raman setup for comparison. A monochromatic laser (LSR) is used as light source, a beam splitter (BS) is ordinarily used (optional) so that the two objectives (EmL, ExG) can be combined into one (L). It is also common to use a slit (SL). The grating (EmG) is shown in a transmission spectrograph configuration with two tube lenses (TL2, TL3). Additional details are in the Methods.