Miniature Spatial Heterodyne Raman Spectrometer with a Cell Phone Camera Detector

作者：Barnett Patrick D; Angel S Michael^*

来源：Applied Spectroscopy, 2017, 71(5): 988-995.

DOI：10.1177/0003702816665127

• Miniature Raman
• cell phone Raman
• spatial heterodyne spectrometer
• SHS
• spatial heterodyne Raman spectrometer
• SHRS

A spatial heterodyne Raman spectrometer (SHRS) with millimeter-sized optics has been coupled with a standard cell phone camera as a detector for Raman measurements. The SHRS is a dispersive-based interferometer with no moving parts and the design is amenable to miniaturization while maintaining high resolution and large spectral range. In this paper, a SHRS with 2.5 mm diffraction gratings has been developed with 17.5 cm(-1) theoretical spectral resolution. The footprint of the SHRS is orders of magnitude smaller than the footprint of charge-coupled device (CCD) detectors typically employed in Raman spectrometers, thus smaller detectors are being explored to shrink the entire spectrometer package. This paper describes the performance of a SHRS with 2.5mm wide diffraction gratings and a cell phone camera detector, using only the cell phone's built-in optics to couple the output of the SHRS to the sensor. Raman spectra of a variety of samples measured with the cell phone are compared to measurements made using the same miniature SHRS with high-quality imaging optics and a high-quality, scientific-grade, thermoelectrically cooled CCD.

• 出版日期2017-5