Camera unit and apparatus for monitoring vehicle periphery
First Claim
Patent Images
1. A camera unit for monitoring a vehicle periphery comprising:
- a pickup element;
a lens system in which light rays are imaged, the light rays incoming from a prescribed range of a visual field onto the pickup element;
the lens system comprising;
a first lens system which is a wide angle lens system configured to be a fisheye lens and having a visual field angle in a horizontal direction H, where H>
=120°
; and
a second lens system which is an anamorphic lens system having an anamorphic ratio >
=1.5, whereinwith respect to a relationship between an image height of respective image portions on an image formed on the pickup element and an image angle of the light rays made incident to the respective image portions, the lens system is configured such that an amount of change in the image height with respect to a change in the image angle is greater at a peripheral portion of the image than at a center part of the image,the camera unit is attached to a vehicle and monitors the vehicle periphery, andthe anamorphic lens system enlarges in the vertical direction the image formed on the pickup element.
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Abstract
A camera unit and an apparatus for monitoring a vehicle periphery, which are capable of picking up a wide range of a visual field while adequately adjusting the visual fields in the horizontal and vertical directions, and at the same time, improving visual confirmation of images displayed. The camera unit may include a pickup element, a lens system in which light rays incoming from a prescribed range of a visual field onto the pickup element are imaged, the lens system including a wide-angle lens system whose visual field angle in the horizontal direction is 120 degrees or more, and an anamorphic lens system whose anamorphic ratio is 1.5 or more.
41 Citations
27 Claims
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1. A camera unit for monitoring a vehicle periphery comprising:
-
a pickup element; a lens system in which light rays are imaged, the light rays incoming from a prescribed range of a visual field onto the pickup element; the lens system comprising; a first lens system which is a wide angle lens system configured to be a fisheye lens and having a visual field angle in a horizontal direction H, where H>
=120°
; anda second lens system which is an anamorphic lens system having an anamorphic ratio >
=1.5, whereinwith respect to a relationship between an image height of respective image portions on an image formed on the pickup element and an image angle of the light rays made incident to the respective image portions, the lens system is configured such that an amount of change in the image height with respect to a change in the image angle is greater at a peripheral portion of the image than at a center part of the image, the camera unit is attached to a vehicle and monitors the vehicle periphery, and the anamorphic lens system enlarges in the vertical direction the image formed on the pickup element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification