Monitor region extension member and motor vehicle peripheral monitoring apparatus using same
First Claim
1. A monitor region extension member which is an optical member for acquiring, when image input means are used to acquire optical images of a monitor region surrounding a motor vehicle, optical images of an extended monitor region which is a predetermined region surrounding the monitor region, in addition to the optical images of the monitor region, said monitor region extension member comprising:
- an upper image passage part in the form of a prism disposed at the upper portion of said member, for optically refracting images of a first predetermined region containing at least said extended monitor region to acquire optical images of said first predetermined region; and
an upper image compression member in the form of a cylindrical prism disposed continuously with said upper image passage part, for optically refracting images of a second predetermined region continuous with said first predetermined region to acquire optical images of said second predetermined region.
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Abstract
A motor vehicle peripheral monitoring apparatus uses a monitor region extension member as optical image forming means. The monitor region extension member comprises an upper image passage part and an upper image compression part. The upper image passage part includes a prism structural element of substantially a semi-conical shape whose prism apical angles become the maximum angle at the center of the member and are decreased toward the extremity from the center of the member. The upper image compression part includes a cylindrical structural element having a curved surface whose angles are set to be smaller continuously from the prism apical angles of the upper image passage part.
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Citations
11 Claims
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1. A monitor region extension member which is an optical member for acquiring, when image input means are used to acquire optical images of a monitor region surrounding a motor vehicle, optical images of an extended monitor region which is a predetermined region surrounding the monitor region, in addition to the optical images of the monitor region, said monitor region extension member comprising:
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an upper image passage part in the form of a prism disposed at the upper portion of said member, for optically refracting images of a first predetermined region containing at least said extended monitor region to acquire optical images of said first predetermined region; and an upper image compression member in the form of a cylindrical prism disposed continuously with said upper image passage part, for optically refracting images of a second predetermined region continuous with said first predetermined region to acquire optical images of said second predetermined region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification