Hoya Corporation

Osamu Asai

Hiroshi Ohta

Eiichi Yajima

Yoshimitsu Gomi

Hatsuyoshi Nakazawa

Manabu Tsurumi

The present invention relates to a photochromic film comprising a photochromic dye and a resin component. The photochromic film has a nanoindentation hardness of equal to or greater than 800 nm on at least one of surfaces, surface A, thereof. The present invention further relates to a method of manufacturing a photochromic lens. The method of manufacturing a photochromic lens of the present invention comprises forming a photochromic film having a nanoindentation hardness ranging from 500 to 5000 nm on an outermost surface thereof as well as having a smaller nanoindentation hardness on a surface facing a first mold than that on the outermost surface by coating a photochromic liquid comprising a photochromic dye and a curable component on one surface of the first mold for formation of one of surfaces of a lens and subjecting the photochromic liquid to curing treatment, and a photochromic lens comprising a photochromic film on a lens substrate is obtained by means of the above first mold.

Photochromic film, photochromic lens comprising the same, and method of manufacturing photochromic lens

A protective film () is eccentrically adhered to a concave-side transfer surface () of a first mold () which is used in a plastic lens forming mold, and part () of the peripheral portion of the protective film is projected laterally from the mold (). The protective film () comprises a film layer with an outer diameter smaller than that of the first mold (), and an adhesive layer with a relatively low adhesive strength which is formed on one surface of the film layer.

Growing community of inventors

Tokyo, Japan

Osamu Asai