Machined echelle gratings by Canon

Takashi Sukegawa; Yukinobu Okura

doi:10.1117/12.3019331

26 August 2024 Machined echelle gratings by Canon

Takashi Sukegawa, Yukinobu Okura

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131005P (2024) https://doi.org/10.1117/12.3019331
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Canon has been continuously developing its own machine for precision and has the capability to obtain sufficient performance even for ultraviolet. The machined grating can realize an ideal shape without material distortion and can handle many materials. The ability to produce an ideal shape makes it possible to acquire the characteristics expected from the geometry (design characteristics) even in a classical echelle grating, and it is possible to select an apex angle that is more efficient in polarization characteristics. Canon provides the degree of freedom from a small pitch to a large pitch for infrared using the characteristics of cutting. The target material can be made of a brittle material (Germanium, InP) from a metallic reflection type, and the brittle material with a high transmittance in infrared can also be used as an immersion grating or a grism. In this paper we show particularly the influence of the apex angle with the echelle grating and introduce the machinability of the Apex angle by cutting.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Takashi Sukegawa and Yukinobu Okura "Machined echelle gratings by Canon", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131005P (26 August 2024); https://doi.org/10.1117/12.3019331

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