Design and construction of an Offner spectrometer based on geometrical analysis of ring fields

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A method to obtain an aberration-corrected Offner spectrometer without ray obstruction is proposed. A new, more efficient spectrometer optics design is suggested in order to increase its spectral resolution. The derivation of a new ring equation to eliminate ray obstruction is based on geometrical analysis of the ring fields for various numerical apertures. The analytical design applying this equation was demonstrated using the optical design software Code V in order to manufacture a spectrometer working in wavelengths of 900-1700 nm. The simulation results show that the new concept offers an analytical initial design taking the least time of calculation. The simulated spectrometer exhibited a modulation transfer function over 80% at Nyquist frequency, root-mean-square spot diameters under 8.6 mu m, and a spectral resolution of 3.2 nm. The final design and its realization of a high resolution Offner spectrometer was demonstrated based on the simulation result. The equation and analytical design procedure shown here can be applied to most Offner systems regardless of the wavelength range.
Publisher
AMER INST PHYSICS
Issue Date
2014-08
Language
English
Article Type
Article
Keywords

IMAGING SPECTROMETER; HYPERSPECTRAL SENSORS; MICROLITHOGRAPHY; EVOLUTION; SYSTEMS; SAFETY

Citation

REVIEW OF SCIENTIFIC INSTRUMENTS, v.85, no.8, pp.083108 - 083108-7

ISSN
0034-6748
DOI
10.1063/1.4892479
URI
http://hdl.handle.net/10203/194542
Appears in Collection
PH-Journal Papers(저널논문)
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