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Optical system, image pickup apparatus, in-vehicle system, and moving apparatus

An image pickup device and optical system technology, applied in the field of optical systems, can solve the problems of not having the imaging magnification of the central area, not being wide enough, etc.

Active Publication Date: 2021-09-28
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The optical system disclosed in JP 2014-164287 supports imaging at a wide angle of view, but does not have sufficient imaging magnification in the central region due to the short paraxial focal length
The optical system disclosed in JP 2018-087938 has a long paraxial focal length and a large imaging magnification in the central region, but has an imageable viewing angle diagonally wide by about 50°, which is not wide enough

Method used

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  • Optical system, image pickup apparatus, in-vehicle system, and moving apparatus
  • Optical system, image pickup apparatus, in-vehicle system, and moving apparatus
  • Optical system, image pickup apparatus, in-vehicle system, and moving apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0090] Unit: mm

[0091] surface data

[0092]

[0093] Aspheric data

[0094] first surface

[0095] K=0.00000e+000 A4=1.23948e-004 A6=-1.33403e-006

[0096] second surface

[0097] K=0.00000e+000 A4=2.82836e-004 A6=-2.77424e-006 A8=1.95302e-008

[0098] Thirteenth surface

[0099] K=0.00000e+000 A4=-1.03701e-003 A6=8.02917e-006

[0100] fourteenth surface

[0101] K=0.00000e+000 A4=-5.64284e-004 A6=-3.65221e-006

[0102] fifteenth surface

[0103] K=0.00000e+000 A4=-5.71632e-004 A6=5.27690e-006

[0104] various data

[0105]

example 2

[0107] Unit: mm

[0108] surface data

[0109]

[0110]

[0111] Aspheric data

[0112] first surface

[0113] K=0.00000e+000 A4=4.94983e-005 A6=-7.98981e-007

[0114] second surface

[0115] K=0.00000e+000 A4=1.87777e-004 A6=-1.69133e-006 A8=1.57584e-008

[0116] twelfth surface

[0117] K=5.07374e+002 A4=-1.43699e-003 A6=1.18112e-005

[0118] Thirteenth surface

[0119] K=0.00000e+000 A4=-1.87271e-004 A6=2.43586e-005

[0120] fourteenth surface

[0121] K=0.00000e+000 A4=6.77818e-005 A6=8.73334e-006

[0122] fifteenth surface

[0123] K=0.00000e+000 A4=-2.43181e-003 A6=3.81106e-005

[0124] various data

[0125]

example 3

[0127] Unit: mm

[0128] surface data

[0129]

[0130]

[0131] Aspheric data

[0132] first surface

[0133] K=0.00000e+000 A4=3.29512e-004 A6=-1.74347e-006 A8=-5.39848e-008A10=3.85932e-010

[0134] second surface

[0135] K=0.00000e+000 A4=8.52223e-004 A6=-1.67993e-005 A8=1.70580e-007A10=-4.79887e-010

[0136] fifteenth surface

[0137] K=0.00000e+000 A4=-8.82748e-004 A6=3.74824e-006

[0138] sixteenth surface

[0139] K=0.00000e+000 A4=-4.75110e-005 A6=-1.27201e-005

[0140] seventeenth surface

[0141] K=0.00000e+000 A4=-5.23871e-004 A6=2.35842e-006

[0142] various data

[0143]

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PUM

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Abstract

Disclosed are an optical system, an image pickup apparatus, an in-vehicle system, and a moving apparatus. The optical system consists of a front lens unit having a positive or negative refractive power, a diaphragm, and a rear lens unit having a positive refractive power, which are arranged in this order from an object side to an image side. The front lens unit includes an aspherical lens that has a positive refractive power on an optical axis, and is disposed closest to an object. The aspherical lens has an aspherical surface on the object side in which an off-axis radius of curvature is larger than an on-axis radius of curvature. A predetermined condition is satisfied.

Description

technical field [0001] The present invention relates to an optical system suitable for an image pickup device such as a vehicle-mounted camera. Background technique [0002] It is important to have a wide viewing angle for an optical system used in an image pickup device such as a vehicle-mounted camera. In particular, in order to recognize a vehicle license plate or the like, the imaging magnification can be large in the center area of ​​the viewing angle. Japanese Patent Laid-Open No. ("JP") 2014-164287 discloses an optical system including a first lens disposed close to an object and having a negative refractive power that becomes stronger from the optical axis of the first lens to the periphery. spherical surface. JP 2018-087938 discloses an optical system with an aspheric surface in which the curvature of the meridian section is changed from a positive value to a negative value. [0003] The optical system disclosed in JP 2014-164287 supports imaging at a wide angle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/06H04N5/225
CPCG02B13/18G02B13/06H04N23/55G02B13/002B60R11/04G02B15/15
Inventor 冈田隆志
Owner CANON KK