MISI-36: Machined image slicer integral field units for the Diffraction-Limited Near-IR Spectropolarimeter

Haosheng Lin; Takashi Sukegawa; Morgan B. Bonnet; Yukinobu Okura; Tomonao Nakayasu; Yukimasa Suyama

doi:10.1117/12.2629979

29 August 2022 MISI-36: Machined image slicer integral field units for the Diffraction-Limited Near-IR Spectropolarimeter

Haosheng Lin, Takashi Sukegawa, Morgan B. Bonnet, Yukinobu Okura, Tomonao Nakayasu, Yukimasa Suyama

Author Affiliations +

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 1218828 (2022) https://doi.org/10.1117/12.2629979
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

With the advancements of ultra-high-precision micro-optics fabrication technologies, it is now possible to fabricate integral field units (IFUs) with slicer mirror width of 30 m or less. This paper describes a 36-um machined image slicer IFU (MISI-36) for the Diffraction-Limited near-IR Spectropolarimeter (DL-NIRSP) of the Daniel K. Inouye Solar Telescope (DKIST). MISI-36 has a unique 2-section image slicer design, and is consists of a monolithic image slicer block with 112 micro slicer mirrors, a parabolic collimator, a monolithic flat mirror array consists of 112 fold mirrors, and a monolithic spherical mirror array consists of 112 spherical mirrors. We have successfully fabricated a prototype device using Canon Inc.’s diamond-cutting CNC, and conducted a preliminary performance evaluation using an experimental bench-top spectrograph similar to the spectrograph of DL-NIRSP. We will present the optical design and optical performances of the MISI-36 prototype.

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Haosheng Lin, Takashi Sukegawa, Morgan B. Bonnet, Yukinobu Okura, Tomonao Nakayasu, and Yukimasa Suyama "MISI-36: Machined image slicer integral field units for the Diffraction-Limited Near-IR Spectropolarimeter", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 1218828 (29 August 2022); https://doi.org/10.1117/12.2629979

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KEYWORDS

Mirrors

Prototyping

Spectrographs

Spherical lenses

Micromirrors

Optical alignment

Optical components

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