The IDAS GNB uses near-infrared
light in addition to the characteristics of the conventional NB series to
capture high-contrast images of galaxies, star clusters, and emission nebulae.
In the visible region (wavelength
400-700nm), where there is a lot of light pollution, it has the characteristics
of a nebula booster that is resistant to light pollution.
It is especially effective in
one-shot color image sensors with high infrared sensitivity (IMX585, etc.). This
filter is coated with high-density, high-durability aging-less IAD (Ion Assist
Deposition) similar to IGAD (Ion-Gun Assist Deposition) used in LPS-D3 and NBZ
The durability of the thin film
is high, and the hardness of the thin film is comparable to quartz glass. Adhesion between the multilayer thin film and
the filter substrate is also significantly improved. Changes over time in
spectral characteristics due to temperature and humidity are almost
non-existent in the environment where humans live.