OPTICAL ELEMENT WITH INFRARED ABSORBING LAYER AND LENS MODULE INCLUDING SAME

• US 20130258455A1
• Filed: 06/27/2012
• Published: 10/03/2013
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: PEI, SHAO-KAI
• Granted Patent: US 9,122,008 B2
• Time in Patent Office: Days
• US Class Current: 359/355
• CPC Class Codes: G02B 13/003 having two lenses
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02B 5/282 reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection

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.

Claims

1. An optical element, comprising:

a transparent substrate comprising an object-side surface; and

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 in blue color.

2. The optical element of claim 1, further comprising an infrared reflecting film, the transparent substrate comprising an image-side surface opposite to the object-side surface, the infrared reflecting film coating on the image-side surface of the transparent substrate.

3. The optical element of claim 2, 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.

4. The optical element of claim 2, wherein the transparent substrate is a lens, and each of the object-side surface and the image-side surface is a spherical or aspheric surface.

5. The optical element of claim 2, wherein the transparent substrate is a flat disc.

6. A lens module, comprising:

a lens barrel;

an optical element received in the lens barrel, comprising;

a transparent substrate comprising an object-side surface; and

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 in blue color.

7. The lens module of claim 6, wherein the transparent substrate comprises an image-side surface opposite to the object-side surface;

the comprises an infrared reflecting film coating on the image-side surface of the transparent substrate.

8. The lens module of claim 7, 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.

9. The lens module of claim 7, wherein the transparent substrate is a lens, and each of the object-side surface and the image-side surface is a spherical or aspheric surface.

10. The lens module of claim 7, wherein the transparent substrate is a flat disc.