Design and fabrication of a 900–1700 nm hyper-spectral imaging spectrometer

• Published in: Optics communications Vol. 283; no. 3; pp. 355 - 361
• Main Authors: Kim, Tae Hyoung, Kong, Hong Jin, Kim, Tae Hoon, Shin, Jae Sung
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2010; Elsevier
• Subjects: Aberration; Aberrations; Apertures; Distortion; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Geometrical optics; Imaging and optical processing; Imaging spectrometers; Low cost; Modulation and optical transfer functions; Modulation transfer function; Optical design; Optical system design; Optics; Physics; Rowland circles; Modulation transfer function; Optical aberration; Geometrical aberrations; Optical design techniques; Spot size; Spectral imaging
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2009.10.022

This paper presents a 900–1700 nm hyper-spectral imaging spectrometer which offers low distortions, a low F-number, a compact size, an easily-fabricated design and a low cost (is presented in this paper). The starting point for its optical design is discussed according to the geometrical aberration theory and Rowland circle condition. It is shown that these methods are useful in designing a push-broom hyper-spectral imaging spectrometer that has an aperture of f/2.4, modulation transfer functions of less than 0.8 at 25 cycles/mm, and spot sizes less than 10 μm. A prototype of the optimized hyper-spectral imaging spectrometer has been fabricated using a high precision machine and the experimental demonstration with the fabricated hyper-spectral imaging spectrometer is presented.