On-vehicle camera lens glass material and on-vehicle camera lens

Abstract

This invention provides an on-vehicle camera lens glass material with excellent resistance to acid rain or medicine and full hardness, which comprises high reflection ratio through reducing the characteristic deterioration caused by ultraviolet ray, and is suitable for composing optical components such as on-vehicle camera lens on the on-vehicle camera which can be exposed under cruel environment, additionally, this invention provides an on-vehicle camera lens made of this on-vehicle camera lens glass material. The 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 the first class; a measurement result in Knoop hardness based on a measurement method prescribed by Japanese Optical Glass Industrial Standard is sixth 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 less than 100*10(-7) DEG C (-1).

Description

technical field [0001] The present invention relates to a lens glass material for an on-vehicle camera and a lens for an on-vehicle camera, which are useful as materials for optical elements such as imaging lenses mounted on an on-vehicle camera. Background technique [0002] Conventionally, in order to eliminate blind spots for the driver to observe while the vehicle is running, a technology of an on-vehicle camera mounted on the vehicle has been proposed. That is, blind spots can be eliminated by mounting a camera that captures images of the rear or side of the vehicle on the body of the vehicle and displaying images captured by the camera at positions that can be visually recognized by the driver. [0003] Optical elements such as imaging lenses mounted in such in-vehicle cameras are inexpensive and lightweight, and therefore, as described in Patent Document 1, elements made of plastic materials or low-refractive glass materials are often used. [0004] When comparing op...

AI Technical Summary

Problems solved by technology

However, if such a protective member is provided, there is a possibility that the imaging angle may be limited, and the imaging angle may not be sufficiently widened.

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