IMAGE PICKUP DEVICE-EQUIPPED REAR-VIEW MIRROR
First Claim
1. An image pickup device-equipped rear-view mirror, comprising:
- a mirror element;
a dark color mask member arranged behind the mirror element; and
a near-infrared camera arranged behind the dark color mask member, an optical axis of the near-infrared camera being directed to a surface of the mirror element via the dark color mask member, wherein;
the mirror element has an integrating sphere reflectance of 40% to 60% in the visible range, and a near-infrared transmittance of no less than 70% for a whole or part of a band belonging to a near-infrared range within an entire sensitive wavelength range of the near-infrared camera;
a near-infrared transmittance of at least a region of the dark color mask member where the near-infrared camera is arranged is no less than 70% for a whole or part of a band belonging to a near-infrared range within the entire sensitive wavelength range of the near-infrared camera; and
the band for which the near-infrared transmittance of the mirror element is no less than 70%, and the band for which the near-infrared transmittance of the dark color mask member is no less than 70% have a band where they overlap each other.
1 Assignment
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Accused Products
Abstract
The present invention is intended to provide an image pickup device-equipped rear view mirror with improved image pickup performance, glare prevention and appearance (design) in addition to improved performance as a vehicle mirror. A mirror element is formed by forming a reflecting film consisting of high refractive index material films and a low refractive index material film on a back surface of a transparent glass substrate. The integrating sphere reflectance of the mirror element in the visible range is 40% to 60% and the near-infrared transmittance is no less than 70% for the whole or part of the band belonging to the near-infrared range within the entire sensitive wavelength range of the near-infrared camera. A black mask member is attached to an entire back surface of the reflecting film. The near-infrared camera is arranged behind the black mask member. The region corresponding to the area for the image-pickup by the near-infrared camera within the entire region of the black mask member is formed of a visible-light absorption and near-infrared transmission filter. The near-infrared transmittance of the visible-light absorption and near-infrared transmission filter is no less than 70% for the whole or part of the band belonging to the near-infrared range within the entire sensitive wavelength range of the near-infrared camera.
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Citations
20 Claims
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1. An image pickup device-equipped rear-view mirror, comprising:
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a mirror element; a dark color mask member arranged behind the mirror element; and a near-infrared camera arranged behind the dark color mask member, an optical axis of the near-infrared camera being directed to a surface of the mirror element via the dark color mask member, wherein; the mirror element has an integrating sphere reflectance of 40% to 60% in the visible range, and a near-infrared transmittance of no less than 70% for a whole or part of a band belonging to a near-infrared range within an entire sensitive wavelength range of the near-infrared camera; a near-infrared transmittance of at least a region of the dark color mask member where the near-infrared camera is arranged is no less than 70% for a whole or part of a band belonging to a near-infrared range within the entire sensitive wavelength range of the near-infrared camera; and the band for which the near-infrared transmittance of the mirror element is no less than 70%, and the band for which the near-infrared transmittance of the dark color mask member is no less than 70% have a band where they overlap each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An image pickup device-equipped rear-view mirror, comprising:
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a mirror element with a reflecting film formed on a surface of a substrate formed of a dark color mask member; and a near-infrared camera arranged behind the mirror element, an optical axis of the near-infrared camera being directed to a surface of the mirror element, wherein; the reflecting film has an integrating sphere reflectance of 40% to 60% in the visible range and a near-infrared transmittance of no less than 70% for a whole or part of a band belonging to a near-infrared range within an entire sensitive wavelength range of the near-infrared camera; a near-infrared transmittance of at least a region of the substrate where the near-infrared camera is arranged is no less than 70% for a whole or part of a band belonging to a near-infrared range within the entire sensitive wavelength range of the near-infrared camera; and the band for which the near-infrared transmittance of the reflecting film is no less than 70%, and the band for which the near-infrared transmittance of the substrate is no less than 70% have a band where they overlap each other.
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Specification