PURPOSE: To prohibit the intrusion of unnecessary external light to a plastic lens by forming an irregular reflecting part having many fine rugged shapes in the part excluding an effective diameter part for allowing the passage of an incident luminous flux out of the lens faces of said lens.
CONSTITUTION: The irregular reflecting part 6 formed with the many rugged shapes which are all fine is provided to the part excluding the effective diameter part 1a having the effective diameters D1, D2 of the front and rear faces out of the lens faces of the plastic lens 1. The intrusion of the external part not necessary for the plastic lens 1 is thus prohibited by which the light to be reflected from the inside face is decreased and the optical performance of the combined lens is improved.
YATSUDA NORIO
INAGE HISAO
| JPS5894936A | 1983-06-06 | |||
| JP57110501B |