Optical unit, image pickup device using the optical unit, and on-vehicle image display device using the image pickup device
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United States of America Patent
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Apr 23, 2013
Grant Date -
May 15, 2008
app pub date -
Oct 17, 2007
filing date -
Nov 14, 2006
priority date (Note) -
In Force
status (Latency Note)
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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).
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