Patent ID: 8077406

Claim:
An on-vehicle camera lens glass material for use in an on-vehicle camera lens, wherein the on-vehicle camera lens glass material is configured such that a measurement result of acid resistance based on a powder method prescribed by Japanese Optical Glass Industrial Standard, is 1 st Class or 2 nd Class; and wherein the on-vehicle camera lens glass material contains: 0.1 to 45% by weight of SiO 2 ; 0.1 to 25% by weight of B 2 O 3 ; 0.1 to 20% by weight of ZrO 2 ; 0 to 50% by weight of La 2 O 3 ; 0 to 30% by weight of Nb 2 O 5 ; and the on-vehicle lens glass material satisfies at least one of following conditions: a measurement result of Knoop hardness based on a measurement method prescribed by Japanese Optical Glass Industrial Standard, is 6 th Class or higher; and a measurement result of solarization based on a measurement method prescribed by Japanese Optical Glass Industrial Standard, is 2% or less.