Theory of concentric designs for grating spectrometers

Abstract

A concentric optical design for a grating spectrometer is described. General aberration theory is given for a family of designs of similar form, showing close similarities with the theory for conventional concentric imagers used in microlithography. Control of stray radiation in the concentric grating spectrometer is discussed.

Earth system science related imaging spectroscopy—An assessment

“…Recently, true spectroscopy focal plane arrays have become available with improved quantum efficiency, increased readout ports, rectangular design and consistent readout in the spectral domain (Chorier et al, 2004;Chuh, 2004), also being expanded to the emissive part of the spectrum. To achieve high spectral-spatial uniformity and high precision measurements advanced optical designs require enabling components (curved, high-efficiency dispersive elements (Lobb, 1994;Mouroulis, 1998) and ultra-straight slits). Opto-mechanical designs must focus on spectral and radiometric stability (Xiong et al, 2005).…”

Instrument pre-development for flex mission

“…A dual Babinet scrambler is placed in front of the telescope to achieve the polarisation sensitivity requirement (less than 1% for the HR spectrometer, 2% for the LR spectrometer). [3]) and CAD view of the opto-mechanical design showing the sub-systems Both spectrometers have unitary magnification and are based on adaptations of the Offner design [4]. For both designs the optical performances are enhanced by the introduction of meniscus lenses.…”

Dyson spectrometers for high-performance infrared applications

“…Wynne 3 continued to refine the Dyson form for microlithography in the visible and ultraviolet, correcting the field with cemented refractive elements, but development of the Dyson principle for spectrographic applications languished until the early 1990s, when it was revived for space applications. 4,5 More recently, Mouroulis and Green 6 considered Dyson designs for visible spectrometry. However, more attention and development has gone into the Offner form and derivatives, 5,6 which are also based on concentric principles and have some competitive advantages for systems with more modest focal ratios.…”