Development of optical elements using original chalcogenide glass

Yoshimasa Matsushita; Mitsuru Tomita; Fumio Sato; Noriaki Masuda; Masafumi Kimata

doi:10.1117/12.2676553

17 October 2023 Development of optical elements using original chalcogenide glass

Yoshimasa Matsushita, Mitsuru Tomita, Fumio Sato, Noriaki Masuda, Masafumi Kimata

Proceedings Volume 12741, Advanced Materials, Biomaterials, and Manufacturing Technologies for Security and Defence; 1274102 (2023) https://doi.org/10.1117/12.2676553
Event: SPIE Security + Defence, 2023, Amsterdam, Netherlands

Abstract

Infrared imaging devices play an important role in many fields. Infrared technology’s consumer applications are expected to expand. However, only a few optical materials can be used in the infrared region. Although germanium has excellent properties, it is unsuitable for the mass production of optical elements. Chalcogenide glass can be press-formed and exhibits high productivity; however, its transmission and other optical properties are not as good as those of germanium. Therefore, we invented an original chalcogenide glass material named FI-02 and developed optical elements using this material. FI-02 has excellent infrared transmission properties with a wider transmission wavelength range than germanium, and its refractive index of 3.4 at a wavelength of 10 m is a very high value as a glass material. Because FI-02 can be press-molded at low temperatures, it is ideal for the mass production of optical elements, such as aspherical lenses. Lens units for a far-infrared (FIR) camera made of FI-02 produce clearer, higher-contrast infrared images by taking advantage of the unique optical properties of the material. Furthermore, we present large-diameter lenses and diffractive elements for aerospace applications as examples of developments that capitalize on the properties of FI-02

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yoshimasa Matsushita, Mitsuru Tomita, Fumio Sato, Noriaki Masuda, and Masafumi Kimata "Development of optical elements using original chalcogenide glass", Proc. SPIE 12741, Advanced Materials, Biomaterials, and Manufacturing Technologies for Security and Defence, 1274102 (17 October 2023); https://doi.org/10.1117/12.2676553

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