Image pickup optical system

Abstract

This invention discloses one light pick up optical system with wide visual angle, which orderly from object end to image end negative diopter rate first optical element, positive second optical element and negative third optical element set with one image sensor unit in imaging end; the pick up optical system meets the following formula, wherein, fp1 for second optical part focus distance and ft for pick up optical system focus distance.

Description

【Technical field】 [0001] The invention relates to an image pickup optical system, in particular to an image pickup lens with a wide viewing angle. 【Background technique】 [0002] Wide-angle pickup optical systems are widely used in products such as monitors, vehicle lenses and interior mirrors. Japanese Laid-Open Patent Application No. Sho 61-035,414 discloses a wide viewing angle interior lens having four optical components and a crescent lens adjacent to the imaging end. [0003] However, although the internal viewing lens of JP-A-61-035,414 can correct the distortion aberration, it cannot make all the light incident on the lens from the object end perpendicularly incident on the CCD, thus producing shadows. [0004] Japanese Laid-Open Patent Publication Hei 01-218,286 discloses a method for improving the above-mentioned shortcoming, which is to insert a field lens between the objective lens and the CCD, so that the light can be vertically incident on the CCD. However, s...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an image pickup optical system, which has a wide viewing angle and solves the problem of image shadows

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