Originally posted by Kunzite Coincidence?
It has a different meaning, the coating is newer and developed by Pentax.
And
Armani Eau Pour Homme is a fragrance developed by Giorgio Armani?
Not very likely. Giorgio Armani's designers have an exclusive agreement with one of world's largest manufacturers of perfumes from Europe; they choose samples, buy the fragrance wholesale, repack in Armani's bottles or perhaps, slightly alter fragrance formulas.
This HD coating was most probably developed by Hoya for its own optics division, and was passed down to Pentax Cameras and Optics to use it, or modify the formula for certain applications. As such, it was bought into Ricoh, and now officially started to be utilised.