1991 Fiscal Year Final Research Report Summary
Development Study of Mosaic Grating
| Project/Area Number |
02504001
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | Kyoto University |
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Principal Investigator |
MAKITA Mitsugu Kyoto University, Faculty of Science, Professor, 理学部, 教授 (90012806)
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| Co-Investigator(Kenkyū-buntansha) |
KATSUNUMA Atsushi NIKON Ltd., 光学本部, 主任
MATSUKAWA Eiji NIKON Ltd., 精材事業部, 係長
FUNAKOSHI Yasuhiro Kyoto University, 理学部, 教務職員 (80127133)
ANDO Hiroyasu National Astronomical Obs., 光学赤外線天文学研究系, 教授 (90111559)
YAMASHITA Yasumasa National Astronomical Obs., 光学赤外線天文学研究系, 教授 (50011458)
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| Project Period (FY) |
1990 – 1991
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| Keywords | Grating / Mosaic-Grating / Piezo element |
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| Research Abstract |
A mosaic grating composed of two echelle gratings (size 20cm X 30cm each) was produced by way of experiment. An Littrow type system (f-2m) was constructed to investigate the mosaic grating.
Required accuracies for aligning the gratings should be better than 0.1 areconds in rotation and 0.1 microns in translation. They were achieved with the combination of piezo elements and mechanical springs.
Strong light sources, such as red (6328A) or green (5435A) laser, made possible to align directions and phases of the reflected light from the two echelle gratings without difficulty. However, the alignment for wider wavelength regions other than the special wavelength given by the laser was not successful in this experimental period.
The laser image was recorded with a video camera in a room where the temperature changed by less then 1ﾟC. The alignment was confirmed of be effective at least 2 hours.
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