Active infrared signature detection device
First Claim
Patent Images
1. An infrared light detection device, comprising:
- a photodiode;
a wave guide having an inner surface comprising a reflective surface for focusing infrared light, the infrared light having a wavelength ranging from about 780 nanometers to about 1300 nanometers, onto the photodiode resulting in an infrared signal;
wave guide walls, fan a base aperture and a receipt aperture, wherein the wave guide walls diverge so the receipt aperture comprises an area larger than an area of the base aperture;
an apex, formed by extending the wave guide walls, comprising an acute angle from about 5 degrees to about 10 degrees; and
, means for processing the infrared signal connected to the photodiode wherein the active infrared signal can be displayed visually or audibly.
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Abstract
The present invention is a device for detecting modulated or active infrared light comprises a photodiode mounted on the base aperture of a wave guide for focusing infrared light onto the photodiode. The wave guide is preferably pyramid shaped and has a reflective surface on the inner surface. The apex of the wave guide comprises an acute angle from about 5 degrees to about 10 degrees. Units to process the signal and amplify the signal are attached thereto. The device may also include a Fresnel lens and a means to adjust the voltage of the active infrared signal processing means to improve detection capabilities.
117 Citations
19 Claims
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1. An infrared light detection device, comprising:
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a photodiode;
a wave guide having an inner surface comprising a reflective surface for focusing infrared light, the infrared light having a wavelength ranging from about 780 nanometers to about 1300 nanometers, onto the photodiode resulting in an infrared signal;
wave guide walls, fan a base aperture and a receipt aperture, wherein the wave guide walls diverge so the receipt aperture comprises an area larger than an area of the base aperture;
an apex, formed by extending the wave guide walls, comprising an acute angle from about 5 degrees to about 10 degrees; and
,means for processing the infrared signal connected to the photodiode wherein the active infrared signal can be displayed visually or audibly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of detecting infrared light having a wavelength from about 780 nanometers to about 1300 nanometers, comprising the steps of:
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obtaining a device comprising a photodiode, a wave guide for focusing the infrared light onto the photo diode having an inner surface comprising a first surface mirror, wave guide walls, forming a base aperture and a receipt aperture, wherein the wave guide walls diverge so the receipt aperture comprises an area larger than an area of the base aperture, an apex formed by extending the wave guide walls comprising an acute angle from about 5 degrees to about 10 degrees, means for processing an infrared signal connected to the photodiode wherein the infrared signal can be displayed visually or audibly;
initiating the device; and
,pointing the wave guide towards an area to detect any infrared light. - View Dependent Claims (19)
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Specification