Abstract

We report on the design, manufacturing, and performance of the image slicer for the High Dispersion Spectrograph on Subaru Telescope. This instrument is a Bowen–Walraven type image slicer, providing five images of 0|$.\!\!\!”$|3 |$\times$| 1|$.\!\!\!”$|5 with a resolving power of |$R$||$=$||$\lambda/\delta \lambda$||$=$| 110000. The resulting resolving power and line profiles have been investigated in detail, including estimates of the defocusing effect on the resolving power. The throughput in a wavelength range of from 400 to 700 nm is higher than 80%, thereby improving the efficiency of the spectrograph under a seeing condition of 0|$.\!\!\!”$|7 by a factor of 1.8.

You do not currently have access to this article.