Infrared light emitting and receiving system

• US 7,813,645 B2
• Filed: 12/28/2006
• Issued: 10/12/2010
• Est. Priority Date: 10/17/2006
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Ga-Lane
• Primary Examiner(s): Vanderpuye; Ken N
• Assistant Examiner(s): Jacob; Oommen
• Application Number:
  US11/617,053
• Publication Number:
  US 20080089694A1
• Time in Patent Office: 1,384 Days
• Field of Search: 398/130, 398/118, 165/250
• US Class Current: 398/130
• CPC Class Codes: H04B 10/1141 One-way transmission

Abstract

An infrared light emitting and receiving system (10) includes an infrared light emitting device (100), and an infrared light receiving device (200). The infrared light emitting device including a heat sink (102), at least a heat pipe (104), a metallic plate (106), and at least an infrared light source (108) in thermal connections with one other in that order. The infrared light receiving device receives infrared light beams (300) emitted from the infrared light emitting device, the infrared light receiving device comprising a lens barrel (202), at least one lens (204) received in the lens barrel, an infrared passband filter (220) formed on the at least one lens, a sensor housing (212) coupled to the lens barrel, and an image sensor (230) received in the sensor housing.

Claims

1. An infrared light emitting and receiving system, comprising:

an infrared light emitting device, the infrared light emitting device comprising a heat sink, at least one heat pipe, a metallic plate, and at least one infrared light source thermally connecting to each other in that order, the at least one heat pipe comprising a layer of sintered porous copper powder doped with carbon nanotubes coated on an inner surface thereof and a working fluid received therein; and

an infrared light receiving device for receiving infrared light emitted from the infrared light emitting device, the infrared light receiving device comprising;

a lens barrel,

at least one lens received in the lens barrel,

an infrared passband filter formed on the at least one lens,

a sensor housing coupled to the lens barrel, and

an image sensor received in the sensor housing.

2. The infrared light emitting and receiving system as claimed in claim 1, wherein the at least one infrared light source is an infrared light emitting diode for emitting infrared light.

3. The infrared light emitting and receiving system as claimed in claim 1, wherein the number of the lenses is in the range from 1 to 10.

4. The infrared light emitting and receiving system as claimed in claim 1, wherein a thickness of the metallic plate is in the approximate range from greater than 0 millimeters to 3 millimeters.

5. The infrared light emitting and receiving system as claimed in claim 1, wherein the image sensor is a complementary metal-oxide semiconductor or a charge-coupled device.

6. The infrared light emitting and receiving system as claimed in claim 1, wherein the lens barrel is threadedly engaged with the sensor housing.

7. The infrared light emitting and receiving system as claimed in claim 3, further comprising a protective cover arranged between the image sensor and the lens next to the image sensor.

8. The infrared light emitting and receiving system as claimed in claim 3, further comprising a plurality of spacers each arranged between two lenses.

9. The infrared light emitting and receiving system as claimed in claim 8, wherein a material of the spacers is dark polymer.

10. The infrared light emitting and receiving system as claimed in claim 2, wherein the infrared light emitting diode is an aluminum gallium arsenide light-emitting diode.

11. The infrared light emitting and receiving system as claimed in claim 1, wherein the infrared passband filter comprises a plurality of titanium dioxide layers and a plurality of silicon dioxide layers alternately stacked one on another.

12. The infrared light emitting and receiving system as claimed in claim 11, wherein the tot number of layers of the infrared passband filter is in a range from 30 to 50.

13. An infrared light emitting and receiving system, comprising:

an infrared light emitting device, the infrared light emitting device comprising a heat sink, at least one heat pipe, a metallic plate, and at least one infrared light source thermally connecting to each other in that order,

the at least one heat pipe comprising a first major surface and a second major surface at two directly opposite sides thereof, the heat sink attached to the first major surface and the metallic plate attached to the second major surface;

the at least one heat pipe further comprising a layer of sintered porous copper powder doped with carbon nanotubes coated on an inner surface thereof and a working fluid received therein and

an infrared light receiving device for receiving infrared light emitted from the infrared light emitting device, the infrared light receiving device comprising;

a lens barrel, at least one lens received in the lens barrel,

an infrared pass band filter formed on the at least one lens,

a sensor housing coupled to the lens barrel, and

an image sensor received in the sensor housing.

14. The infrared light emitting and receiving system as claimed in claim 13, wherein the first major surface is substantially parallel to the second major surface.