27 September 2008 Spectrometer design approaching the limit
Author Affiliations +
The design limits of grating array spectral sensors are discussed. The limit of a grating spectrometer with respect to the resolution is given by the diffraction limit of the grating. To approach the limit for the visible spectral region the entrance slits should reach a width of 2 μm and larger depending on wavelength and numerical aperture. The detector pixel sizes should be in the same range, which is achieved virtually by the discussed double array arrangement with a transmissive, static slit array and detector array. A number of techniques are applied for optimizing the performance as well as for miniaturization. A sub-pixel imaging including a sub-pixel analysis based on the double array arrangement virtually reduces the detector pixel sizes down to about 20%. To avoid the imaging aberrations the spectra is imaged from different entrance positions by the entrance slit array. The throughput can be increased by using a two dimensional entrance slit array, which includes a multiplex pattern or a fixed adaptive pattern. The design example of a UV-Raman spectral sensor is presented including spectral measurements.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rainer Riesenberg, Andreas Wuttig, Thomas Peschel, Christoph Damm, Hans-Jürgen Dobschal, "Spectrometer design approaching the limit", Proc. SPIE 7100, Optical Design and Engineering III, 71001A (27 September 2008); doi: 10.1117/12.797706; https://doi.org/10.1117/12.797706


INSCAN PRO: a fast ultraviolet spectrometer design approach
Proceedings of SPIE (November 18 2013)
Limits of spectral resolution in optical measurements
Proceedings of SPIE (August 22 2014)
Applications of multichannel imaging spectrometer
Proceedings of SPIE (December 09 2004)
Linear wavelength spectrometer
Proceedings of SPIE (December 05 2001)
The Constellation-X reflection grating spectrometer
Proceedings of SPIE (June 13 2006)

Back to Top