Infrared light emitting and receiving system
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.
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.