WIDE-ANGLE LENS SYSTEM FOR VISIBLE RAY AND NEAR INFRARED RAYS

摘要

The present invention relates to a wide-angle lens system for visible ray and near infrared rays which is applicable for a vehicle and a monitoring camera and which performing excellent optical performance in a visible ray band and an near infrared ray band. The wide-angle lens system for visible ray and near infrared rays includes a first glass lens of a convex meniscus type convex toward an object which has a negative refractive force successively from objects; a second plastic lens of a meniscus type which has a positive refractive force and includes at least one non-aspherical surface and which is recessed toward an object; a third plastic lens which has a positive refractive force and which includes at least one non-aspherical surface; a forth glass lens of both-side convex shape which has a positive refractive force; and a fifth plastic lens which has a negative refractive force and which includes at least one non-aspherical surface. The present invention is provided to reduce manufacturing costs by utilizing two glass lenses or less and to photograph a subject within a visible ray region and a near infrared ray region at high definition and obtain enough definition even though the temperature is changed within a range of (-20~80.