Optical element with infrared absorbing layer and lens module including same
First Claim
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1. An optical element, comprising:
- a transparent substrate comprising an object-side surface and an image-side surface opposite to the object-side surface;
an infrared absorbing layer positioned on the object-side surface of the transparent substrate;
wherein the infrared absorbing layer is a thermo-sensitive ink, the thermo-sensitive ink is cured to be in blue color; and
an infrared reflecting film coating on the image-side surface of the transparent substrate, wherein the infrared reflecting film comprises fifty-four layers stacked in an order facing away from the image-side surface;
the odd numbered layers of the infrared reflecting film are made from titanium dioxide;
the even numbered layers of the infrared reflecting film are made from silicon dioxide.
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Abstract
An optical element includes a transparent substrate and an infrared absorbing layer on an object-side surface of the transparent substrate. The infrared absorbing layer is a thermo sensitive ink printed or deposited on the transparent substrate. The thermo sensitive ink is cured to blue color.
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Citations
6 Claims
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1. An optical element, comprising:
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a transparent substrate comprising an object-side surface and an image-side surface opposite to the object-side surface; an infrared absorbing layer positioned on the object-side surface of the transparent substrate;
wherein the infrared absorbing layer is a thermo-sensitive ink, the thermo-sensitive ink is cured to be in blue color; andan infrared reflecting film coating on the image-side surface of the transparent substrate, wherein the infrared reflecting film comprises fifty-four layers stacked in an order facing away from the image-side surface;
the odd numbered layers of the infrared reflecting film are made from titanium dioxide;
the even numbered layers of the infrared reflecting film are made from silicon dioxide. - View Dependent Claims (2, 3)
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4. A lens module, comprising:
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a lens barrel; and an optical element received in the lens barrel, comprising; a transparent substrate comprising an object-side surface and an image-side surface opposite to the object-side surface; an infrared absorbing layer positioned on the object-side surface of the transparent substrate;
wherein the infrared absorbing layer is a thermo-sensitive ink, the thermo-sensitive ink is cured to be in blue color; andan infrared reflecting film coating on the image-side surface of the transparent substrate, wherein the infrared reflecting film comprises fifty-four layers stacked in an order facing away from the image-side surface;
the odd numbered layers of the infrared reflecting film are made from titanium dioxide;
the even numbered layers of the infrared reflecting film are made from silicon dioxide. - View Dependent Claims (5, 6)
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Specification