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US 2002/0118471 A1Published application
Apparatus for watching around vehicle
AssigneeAutonetworks Technologies, Ltd.
InventorMasayoshi Imoto
Life of this patent
Estimating the term…
Abstract
In an apparatus for watching around a vehicle, an internal reflection preventive film 37 for preventing stray light from undergoing total reflection in a prism is formed outside an effective area with respect to an imaging lens 9 disposed to the rear side 8B of the prism. Thus, the quantity of stray light is reduced by preventing the total reflection.
Claims17
An apparatus for watching around a vehicle, comprising:
- an imaging device including;
- a casing disposed on an outer side of said vehicle and having a pair of right and left transmission window portions in either side of said casing,
- a prism contained in said casing in the form of an isosceles triangle in section with a vertical angle directed to a front part of said casing, the right and left sides of said prism which correspond to the equal sides of the isosceles triangle being directed to the respective right and left transmission window portions, and
- an imaging element disposed to the rear of said prism and used for converting a ray of light into an image signal by concentrating light on an imaging plane via an imaging lens, the ray of light being incident on one of the right and left sides of said prism, reflected from the other side of said prism and emitted from the rear side of said prism, and
- internal reflection preventive means for preventing stray light from undergoing total reflection in said prism being formed outside an effective area with respect to said imaging lens disposed to the rear side of said prism.
2 more elements
An apparatus for watching around a vehicle, comprising:
- an imaging device including;
- a casing disposed on the outer side of the vehicle and having a pair of right and left transmission window portions in either side of the casing, and
- a prism contained in said casing in the form of an isosceles triangle in section with its vertical angle directed to the front part of the casing, the right and left sides of the prism which correspond to the equal sides of the isosceles triangle being directed to the respective right and left transmission window portions, and
- an imaging element disposed to the rear of said prism and used for converting a ray of light into an image signal by concentrating light on an imaging plane via an imaging lens, the ray of light being incident on one of the right and left sides of said prism, reflected from the other side of said prism and emitted from the rear side of said prism, and
- light absorbing means for absorbing light with the partial reflection of the stray light from the side of said prism being formed in part of the side of said prism.
2 more elements
An apparatus for watching around a vehicle, comprising:
- an imaging device including;
- a casing disposed on the outer side of said vehicle and having a pair of right and left transmission window portions in either side of said casing,
- a prism contained in said casing in the form of an isosceles triangle in section with a vertical angle directed to the front part of said casing, the right and left sides of said prism which correspond to the equal sides of the isosceles triangle being directed to the respective right and left transmission window portions, and
- an imaging element disposed to the rear of said prism and used for converting a ray of light into an image signal by concentrating light on an imaging plane via an imaging lens, the ray of light being incident on one of the right and left sides of said prism, reflected from the other side of said prism and emitted from the rear side of said prism, wherein
- corner portions formed with the sides of said prism and the rear side of said prism are cut in a range excluding a range of horizontal viewing angles of said prism.
2 more elements
Dependencies are inferred from the claim text.