On-vehicle camera lens glass material and on-vehicle camera lens
AssigneeHoya Corporation
InventorsYoichi Hachitani, Kazuo Tachiwana
Life of this patent
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Abstract
An on-vehicle camera lens glass material satisfies at least one of conditions in which a measurement result in water resistance based on a powder method prescribed by Japanese Optical Glass Industrial Standard is 1st Class, a measurement result in Knoop hardness based on a measurement method prescribed by Japanese Optical Glass Industrial Standard is 6th Class or higher, a measurement result in solarization based on a measurement method prescribed by Japanese Optical Glass Industrial Standard is 2% or less, and a measurement result in average linear expansion coefficient based on a measurement method prescribed by Japanese Optical Glass Industrial Standard is 100×10−7° C.−1 or less.
Claims19
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 1st Class or 2nd Class;
- and
- wherein the on-vehicle camera lens glass material contains:
- 0.1 to 45% by weight of SiO2;
- 0.1 to 25% by weight of B2O3;
- 0.1 to 20% by weight of ZrO2;
- 0 to 50% by weight of La2O3;
- 0 to 30% by weight of Nb2O5;
- 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 6th 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.
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 total content of CeO2 and Fe2O3 is in a range of 0.1 to 1% by weight;
- and
- wherein the material contains:
- 0.1 to 45% by weight of SiO2;
- 0.1 to 25% by weight of B2O3;
- 0.1 to 20% by weight of ZrO2;
- 0 to 50% by weight of La2O3;
- and
- 0 to 30% by weight of Nb2O5.
Dependencies are inferred from the claim text.