FIELD OF THE INVENTION
The present invention relates to an identification patch for identifying an object. In particular, the present invention relates to an identification patch and co-located source of infrared illumination.
BACKGROUND OF THE INVENTION
Soldiers and the like are often identified using insignia which provides identification of rank, unit, country and the like. The prior art also reveals insignia which reflects infrared light or thermal radiation and which are more readily visible at night using an appropriate image intensifier or night vision device, especially when illuminated with an appropriate external source of infrared or thermal radiation. However, such sources are located at the image intensifier or night vision device and therefore must cover a large field of view and be relatively powerful. This also means that the location of the image intensifier or night vision device is identifiable which may draw unwanted fire.
SUMMARY OF THE INVENTION
In order to address the above and other drawbacks there is provided a device for identifying an object. The device comprises a support adapted for attachment to the object, an identification badge mounted on the support and comprising a surface at least a portion of which is reflective to infrared light and having an insignia thereon, and a source of infrared light mounted on the support and comprising at least one infrared light emitting LED. The source is directed towards the badge such that the infrared light emitted from the at least one infrared LED falls on the reflective surface.
There is also disclosed a system for identifying an object. The system comprises an identification badge comprising a surface at least a portion of which is reflective to infrared light and having an insignia thereon, and a source of infrared light co-located with the badge and comprising at least one infrared light emitting LED. The source and the badge are both secured to the object and further wherein the source is positioned relative to the badge such that the light emitted from the at least one infrared LED falls on the reflective surface.
Additionally, there is provided a method of identifying an object. The method comprises providing an identification badge comprising a surface at least a portion of which is reflective to infrared light and having an insignia thereon, attaching a source of infrared light comprising at least one infrared LED and the badge to the object, and directing the source towards the badge such that the light emitted from the at least one infrared LED falls on the surface.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan view of an identification device in accordance with an illustrative embodiment of the present invention;
FIG. 2A is a back view of a soldier equipped with the device of FIG. 1, FIG. 2B is a front right view of a soldier equipped with the device of FIG. 1 in accordance with an alternative illustrative embodiment of the present invention, and FIG. 2C is a front right view of a soldier equipped with the device of FIG. 1 in accordance with a second alternative illustrative embodiment of the present invention;
FIG. 3 is a descriptive diagram showing the use of the device of FIG. 1 together with a night vision device;
FIGS. 4A and 4B provide images of a solider viewed through a night vision device respectively of a conventional identification badge and the identification device of the present invention;
FIG. 5 provides a side plan view of an identification device in accordance with a third alternative illustrative embodiment of the present invention;
FIG. 6A provides a top plan view of an identification device in accordance with a forth alternative illustrative embodiment of the present invention; and
FIG. 6B provides a side cut-away view of the identification device of FIG. 6A along line VIB-VIB.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
Referring now to FIG. 1, an identification device, general referred to using the reference numeral 10, and in accordance with an illustrative embodiment of the present invention will be described. The identification device 10 comprises a substantially flat identification patch or badge 12 co-located with a source of infrared light 14. The badge 12 and light source 14 are arranged such that at lease some of the infrared light emitted by the light source 14 falls on the surface 16 of the badge 12 and illuminates it. In a particular embodiment the badge 12 and light source 14 are arranged such that substantially all of the infrared light emitted by the light source 14 falls primarily upon the surface 16 of the badge 12. The surface 16 of the badge 12 is imprinted or otherwise treated to reflect the infrared light emitted by the light source, and comprises a distinguishable insignia 18, such as a flag, number, symbol, logo or the like. The badge 12 can be fabricated from materials that are reflective in the IR band or the thermal band or combinations thereof.
Still referring to FIG. 1, in a preferred embodiment the distinguishable insignia 18 is substantially invisible, particularly at night, when the device 12 is viewed with the naked eye, but is visible when viewed with an appropriate infra-red viewing device. Materials used to imprint or otherwise treat the badge to delineate, or render, the insignia include for example infra-red glow tape of the like, infrared paints such as fluorescent infrared paints, and other coatings and inks containing infrared reflective pigmentations and the like. In particular, the materials used to imprint or otherwise treat the badge 12 typically absorb much of the light in the visible range (having a wavelength of about 390 nm to 700 nm) but are highly reflective to infrared in at least a portion of the band between 850 nm and 1700 nm. The infrared light source 14 is also selected such that it operates within the range that the materials used to imprint the badge are reflective to infrared.
Referring now to FIG. 2A, in an illustrative embodiment, the device 10 is positioned on a person (or object) to be identified, such as a solider 20. In this regard the light source 14 is fixed to the helmet 22 of the solider 20 and the badge 12 affixed to the back 24 of the solider, for example on the top of a backpack or the like (not shown). The light source 14 is directed towards the badge 12 such that the light emitted by the light source 14 falls on the surface 16 of the badge 12. Note that although the badge 12 is shown affixed to the back, other regions of the soldier 20, for example the shoulder 26, may also prove suitable with appropriate modifications to the position of the light source 14.
Referring now to FIG. 2B, in an alternative illustrative embodiment, the device 10 is adapted for wrapping around the shoulder of the soldier 20. The light source 14 is fixed to the side of the helmet 22 of the solider 20 and the badge 12 is wrapped over the shoulder of the solider 20. The light source 14 is directed towards the badge 12 such that the light emitted by the light source 14 falls on all surfaces 16 of the badge 12. In this manner the badge 12 can be seen from the front and back as well as above.
Referring to FIG. 2C, in a second alternative embodiment, the badge 12 can be moulded or shaped such that it is three dimensional and raised and adapted to be attached to the soldier's shoulder as an epaulette or the like.
Referring now to FIG. 3, the identification device 10 is foreseen for viewing through night vision equipment 28 or the like which is sensitive to infrared light. Illustratively, a portable night vision equipment 28 is shown attached to the helmet 30 of a viewing solider 32.
Referring now to FIGS. 4A and 4B in addition to FIG. 3, by combining a localized light source 14 with the badge 12, the visibility of the badge 12 when viewed through an infrared night vision equipment is greatly augmented (FIG. 4B) than when a conventional badge 34 without co-located light source. This greatly improves the positive identification of the badge 12, thereby reducing the possibility that the soldier 20 is misidentified and injured or killed by friendly fire.
Referring now to FIG. 5, in a particular embodiment the positioning of the light source 14 relative to the reflective badge 12 can be better controlled by providing a rigid support 36 onto which the badge 12 and light source 14 can be mounted. The support 36 can include an attaching means such as a clip 38, magnet, Velcro, adhesive, strap or the like for attaching the support to the user's uniform, backpack or the like.
Referring now to FIGS. 6A and 6B, in a forth alternative embodiment the identification patch 10 comprises light source(s) 14, such as infrared LEDs or the like, which are integrated with the badge 12 and cast light on the badge surface 16 thereby improving its visibility. A power source 40 and electronics 42 are also provided to illuminate the light source(s) 14. In a particular embodiment, a light guiding or emitting material 44, such as an edge emitting optic fiber or light tube or the like, may be used to more evenly disburse the light emitted by the light source(s) 14 over the surface 16 of the identification patch 10. Additionally, the badge 12 may be overlaid with a transparent material 46 such as glass or plastic or the like.
It is to be understood that the invention is not limited in its application to the details of construction and parts illustrated in the accompanying drawings and described hereinabove. The invention is capable of other embodiments and of being practised in various ways. It is also to be understood that the phraseology or terminology used herein is for the purpose of description and not limitation. Hence, although the present invention has been described hereinabove by way of preferred embodiments thereof, it can be modified, without departing from the spirit, scope and nature of the subject invention as defined in the appended claims.
Patent Grant
8692221
