ASAHI SPECTRA Mauna Kea Filters

ASAHI SPECTRA Mauna Kea Filters

与天文学中的光学滤光片不同，对天文红外滤光片的要求非常苛刻。

HgCdTe成像传感器要求红外滤光片具有很宽的阻挡范围，从0.4μm到2.7μm，有时超过3μm。

真空和低温环境也需要通过整体式基材来制造。

*终需要巨大的厚层干涉膜才能达到这两个要求。

ASAHI SPECTRA Mauna Kea Filters
Mauna Kea Observatories (MKO) Y, J, H and Ks filter specifications were defined by Dr. Alan Tokunaga, University of Hawaii.
MKO filters are currently standard photometric system in NIR region as SDSS u, g, r, i and z-band filters in optical region.
We produce Y, J, H, Ks filters by magnetron sputtering and ion assisted deposition technology with single substrate on the basis
of MKO filter specifications, and measure the transmission curve under 77K cryogenic condition by ourselves.

ASAHI SPECTRA Mauna Kea Filters