Optical unit, image pickup device using the optical unit, and on-vehicle image display device using the image pickup device
First Claim
Patent Images
1. An optical unit comprising:
- a light transmissive portion; and
a light non-transmissive portion adjacent the light transmissive portion,wherein the light transmissive portion includes a water-repellent surface region and the light non-transmissive portion includes a hydrophilic surface region;
wherein hydrophilicity in the hydrophilic surface region increases toward a predetermined drainage location; and
the surface region of the light-transmissive portion and the surface region of the light non-transmissive portion includes a first coating of a water-repellent material, and a second coating over a portion of the first coating of the water-repellent material, wherein the second coating comprises a hydrophilic material, and covers the portion of the first coating corresponding to the hydrophilic surface region of the light non-transmissive portion.
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Accused Products
Abstract
A lens unit or the like with improved ability to capture proper images by reducing the likelihood that water droplets will adhere to the lens surface and change the refractive index. A surface of a lens portion (1) is imparted with a water-repellent property and a surface of a non-lens portion (2), surrounding the lens portion (1), is imparted with a hydrophilic property. As a result, if droplets on the surface of the lens portion (1) contact the non-lens portion (2), the droplets are guided from the water-repellent surface of the lens portion (1) to the hydrophilic surface of the non-lens portion (2) thereby reducing the number of droplets residing on the lens portion (1).
13 Citations
14 Claims
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1. An optical unit comprising:
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a light transmissive portion; and a light non-transmissive portion adjacent the light transmissive portion, wherein the light transmissive portion includes a water-repellent surface region and the light non-transmissive portion includes a hydrophilic surface region; wherein hydrophilicity in the hydrophilic surface region increases toward a predetermined drainage location; and the surface region of the light-transmissive portion and the surface region of the light non-transmissive portion includes a first coating of a water-repellent material, and a second coating over a portion of the first coating of the water-repellent material, wherein the second coating comprises a hydrophilic material, and covers the portion of the first coating corresponding to the hydrophilic surface region of the light non-transmissive portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical unit comprising:
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a light transmissive portion; a light non-transmissive portion adjacent the light transmissive portion; and
,an image pickup device located opposite a surface of the light transmissive portion; wherein the light transmissive portion includes a water-repellant surface region and the light non-transmissive portion includes a hydrophilic surface region; wherein hydrophilicity varies in the hydrophilic surface region; and
,wherein the image pickup device is attached to a vehicle such that a light transmissive portion of the image pickup device is oriented non-perpendicular to a ground, wherein the hydrophilicity varies in the hydrophilic region to gradually increase from an upper portion to a lower portion of the hydrophilic region. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification