초록 ▼

The invention is a dual function laser device for use in night vision systems. The invention uses lenses to cause one portion of a laser beam to converge to a target point and another portion of the beam to diverge. The divergent portion is variable in size and illuminates a viewable area around the

The invention is a dual function laser device for use in night vision systems. The invention uses lenses to cause one portion of a laser beam to converge to a target point and another portion of the beam to diverge. The divergent portion is variable in size and illuminates a viewable area around the target point. Rather than use two lasers to create an illuminated view area around an illuminated target point, the invention uses a combination of a lens and a sub-aperture lens arrangement to create two illuminations from a single laser.

대표청구항 ▼

The invention is a dual function laser device for use in night vision systems. The invention uses lenses to cause one portion of a laser beam to converge to a target point and another portion of the beam to diverge. The divergent portion is variable in size and illuminates a viewable area around the

The invention is a dual function laser device for use in night vision systems. The invention uses lenses to cause one portion of a laser beam to converge to a target point and another portion of the beam to diverge. The divergent portion is variable in size and illuminates a viewable area around the target point. Rather than use two lasers to create an illuminated view area around an illuminated target point, the invention uses a combination of a lens and a sub-aperture lens arrangement to create two illuminations from a single laser. steps of: a) selecting a directed trail T from the multiplicity of directed trails in dependence upon the destination of a packet, the selected trail including the source node and destination node of the packet; b) outputting the packet at the source node onto the selected one of the multiplicity of directed trails; c) reading, at each intermediate node traversed by the packet, a destination address carried in the packet; and d) if the packet is addressed to another node, forwarding the packet in a direction that is predetermined and independent of any address information carried by the packet; wherein switching occurs at a point of connection between cycles from a link-disjoint directed-cycle decomposition of the network. 8. A method according to claim 7, wherein the packet is an optical packet carried on a photonic network. 9. A method according to claim 7, wherein the step of selecting a directed trail T includes synchronizing the initial dispatch of the packet with prescheduled switching at an intermediate node. 10. A method according to claim 7, wherein the nodes switch in synchronism throughout the network between pre-scheduled pre-determined switching states. 11. A method of routing a packet in a communications network, the network comprising a multiplicity of nodes and links, and wherein the nodes and links are configured as a multiplicity of directed trails, each directed trail linking only some of the multiplicity of nodes and the directed trails in combination spanning every node of the network, the method comprising the steps of: a) selecting a directed trail T from the multiplicity of directed trails in dependence upon the destination of a packet, the selected trail including the source node and destination node of the packet; b) outputting the packet at the source node onto the selected one of the multiplicity of directed trails; c) reading, at each intermediate node traversed by the packet, a destination address carried in the packet; and d) if the packet is addressed to another node, forwarding the packet in a direction that is predetermined and independent of any address information carried by the packet; wherein the nodes switch in synchronism throughout the network between pre-scheduled pre-determined switching states; and a timing sequence for the prescheduled switching of intermediate nodes comprises a frame divided into a plurality of time slots and a source node outputs a packet onto the network in a selected one of a plurality of time slots within a timing frame, and the length of the link between successive nodes in a trail is such that a packet leaving one node in a first time slot arrives at the next successive node in a second time slot. 12. A method according to claim 11, wherein the length of the link is such that on travelling between the successive nodes the packet is advanced or retarded by one time slot. 13. A method according to claim 11, wherein the packet is an optical packet carried on a photonic network. 14. A method according to claim 11, wherein the step of selecting a directed trail T includes synchronizing the initial dispatch of the packet with prescheduled switching at an intermediate node. 15. A communications network, comprising: a) a multiplicity of nodes including at least one source node, at least one destination node, and a plurality of intermediate links therebetween, the nodes and the links being configured as a multiplicity of directed trails, each directed trail spanning some of the multiplicity of nodes, the multiplicity of directed trails in combination spanning every node of the network, each source node being connected to each destination node by a respective directed trail; b) means for selecting a directed trail T from the multiplicity of directed trails in dependence upon the destination of a packet, the selected trail including the source node and destination node of the packet; c) means for outputting the packet at the so