| abstract |
(Problem to be Solved) It is an object of the present invention to suppress the absorption of wavelength light near 420 nm while absorbing a wavelength of 400 to 420 nm sufficiently and efficiently, to suppress the yellowing, to suppress the yellowing, To provide a plastic lens excellent in heat resistance and light resistance, and further in optical performance, particularly Abbe's number. (I): wherein R 1 to R 8 each independently represent a monovalent group such as a hydrogen atom. R 9 is a divalent hydrocarbon group of the following formula (i): wherein R 10 is a divalent hydrocarbon group having 1 to 20 carbon atoms, R 11 is a divalent hydrocarbon group having 1 to 20 carbon atoms, and R 12 is a hydrocarbon group having 1 to 20 carbon atoms R 10 and n R 11 and R 12 have a total carbon number of 30 or less, m represents an integer of 0 or 1, and n represents an integer of 0 to 3.) A sulfur-containing monovalent group, and a resin material. |