Image pickup optical system

A technology of optical systems and optical components, applied in optics, optical components, instruments, etc., can solve problems such as shadows in images, achieve the effects of eliminating distortion aberrations and coma aberrations, and reducing production costs

Active Publication Date: 2007-08-01
ASIA OPTICAL CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment Construction

[0023] The image pickup optical system of the present invention has the advantage of wide viewing angle, and can be applied to endoscopes, monitors, vehicle lenses and the like. The image pickup optical system sequentially includes a first optical component with a negative refractive index, a second optical component with a positive refractive index, and a third optical component with a negative refractive index from the object end to the imaging end. Wherein, the second optical component of the image pickup optical system must meet the following conditions:

[0024] 0.7 | f p 1 f p 2 | 1.3 - - - ( 1 )

[0025] Among them, f p1 is the focal length of the second optical compo...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B9/12G02B1/04G02B13/18
Inventor 唐乃元
Owner ASIA OPTICAL CO INC
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