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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2403.01668 |
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| _version_ | 1866909129332752384 |
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| author | Kushibiki, Kosuke Ozaki, Shinobu Takeda, Masahiro Hosobata, Takuya Yamagata, Yutaka Morita, Shinya Tsuzuki, Toshihiro Nakagawa, Keiichi Saiki, Takao Ohtake, Yutaka Mitsui, Kenji Okita, Hirofumi Kitagawa, Yutaro Kono, Yukihiro Motohara, Kentaro Takahashi, Hidenori Konishi, Masahiro Kato, Natsuko Koyama, Shuhei Chen, Nuo |
| author_facet | Kushibiki, Kosuke Ozaki, Shinobu Takeda, Masahiro Hosobata, Takuya Yamagata, Yutaka Morita, Shinya Tsuzuki, Toshihiro Nakagawa, Keiichi Saiki, Takao Ohtake, Yutaka Mitsui, Kenji Okita, Hirofumi Kitagawa, Yutaro Kono, Yukihiro Motohara, Kentaro Takahashi, Hidenori Konishi, Masahiro Kato, Natsuko Koyama, Shuhei Chen, Nuo |
| contents | Integral Field Spectroscopy (IFS) is an observational method to obtain spatially resolved spectra over a specific field of view (FoV) in a single exposure. In recent years, near-infrared IFS has gained importance in observing objects with strong dust attenuation or at high redshift. One limitation of existing near-infrared IFS instruments is their relatively small FoV, less than 100 arcsec$^2$, compared to optical instruments. Therefore, we have developed a near-infrared (0.9-2.5 $\mathrmμ$m) image-slicer type integral field unit (IFU) with a larger FoV of 13.5 $\times$ 10.4 arcsec$^2$ by matching a slice width to a typical seeing size of 0.4 arcsec. The IFU has a compact optical design utilizing off-axis ellipsoidal mirrors to reduce aberrations. Complex optical elements were fabricated using an ultra-precision cutting machine to achieve RMS surface roughness of less than 10 nm and a P-V shape error of less than 300 nm. The ultra-precision machining can also simplify alignment procedures. The on-sky performance evaluation confirmed that the image quality and the throughput of the IFU were as designed. In conclusion, we have successfully developed a compact IFU utilizing an ultra-precision cutting technique, almost fulfilling the requirements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_01668 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Development of a near-infrared wide-field integral field unit by ultra-precision diamond cutting Kushibiki, Kosuke Ozaki, Shinobu Takeda, Masahiro Hosobata, Takuya Yamagata, Yutaka Morita, Shinya Tsuzuki, Toshihiro Nakagawa, Keiichi Saiki, Takao Ohtake, Yutaka Mitsui, Kenji Okita, Hirofumi Kitagawa, Yutaro Kono, Yukihiro Motohara, Kentaro Takahashi, Hidenori Konishi, Masahiro Kato, Natsuko Koyama, Shuhei Chen, Nuo Instrumentation and Methods for Astrophysics Integral Field Spectroscopy (IFS) is an observational method to obtain spatially resolved spectra over a specific field of view (FoV) in a single exposure. In recent years, near-infrared IFS has gained importance in observing objects with strong dust attenuation or at high redshift. One limitation of existing near-infrared IFS instruments is their relatively small FoV, less than 100 arcsec$^2$, compared to optical instruments. Therefore, we have developed a near-infrared (0.9-2.5 $\mathrmμ$m) image-slicer type integral field unit (IFU) with a larger FoV of 13.5 $\times$ 10.4 arcsec$^2$ by matching a slice width to a typical seeing size of 0.4 arcsec. The IFU has a compact optical design utilizing off-axis ellipsoidal mirrors to reduce aberrations. Complex optical elements were fabricated using an ultra-precision cutting machine to achieve RMS surface roughness of less than 10 nm and a P-V shape error of less than 300 nm. The ultra-precision machining can also simplify alignment procedures. The on-sky performance evaluation confirmed that the image quality and the throughput of the IFU were as designed. In conclusion, we have successfully developed a compact IFU utilizing an ultra-precision cutting technique, almost fulfilling the requirements. |
| title | Development of a near-infrared wide-field integral field unit by ultra-precision diamond cutting |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2403.01668 |