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AssigneeDatalase Ltd.
InventorsJohn V. Cridland, Tristan Phillips
Estimating the term…
A system for laser marking a substrate includes a multi-emitter array (16) for directing radiation onto a substrate. The multi-emitter array has a radiation guide (19) defining a number of discrete emission channels (20) with emitting ends (20a) of the emission channels (20) arranged in an array. Each emission channel (20) is coupled at its opposing end with two or more laser diodes (18a, 18b). The laser diodes (18a, 18b) are operated at a maximum operational output power (Pop) sufficiently below their rated maximum power (Pm) to provide acceptable levels of reliability whilst providing a combined radiation (24) emitted from each channel (20) having a power high enough to achieve increased operational speeds. The multi-emitter array (19) may comprise a number of optical fibres (26) whose emitter ends are arranged in an array. The system is particularly suited for inkless printing on substrates susceptible to colour change when irradiated.
A system for laser marking a substrate, the system comprising a multi-emitter array having a plurality of individually controllable discrete emission channels, each emission channel having an emitting end from which radiation is directed onto a selected area of the substrate in use, the emitting ends being arranged in an array, wherein each emission channel is coupled with at least two laser diodes and the system is configured, in use, to operate each laser diode at a maximum operating output power (Pop) that is less than 63% of its rated maximum power (Pm).
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A system for marking a substrate susceptible to colour change upon irradiation, the system comprising a plurality of optical fibres, each optical fibre having an emitter end from which radiation is directed onto the substrate in use, the emitter ends of the optical fibres being arranged in an array, and at least two laser diodes coupled with each optical fibre at the opposing end, the system configured such that, in use, each laser diode is operated at a maximum operating output power (Pop) that is less than 63% of its rated maximum power (Pm).
A method of laser marking a substrate using a system comprising a multi-emitter array for directing radiation onto the substrate, wherein the multi-emitter array defines a plurality of emission channels, the emitting ends of which are arranged in an array with each emitter end being configured to independently direct radiation onto the substrate in use, and wherein each emission channel is coupled with at least two laser diodes, the method comprising operating each laser diode at a maximum operating output power (Pop) that is less than 63% of its rated maximum power (Pm).
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A method of marking a substrate susceptible to colour change when irradiated using a system comprising a plurality of optical fibres, emitter ends of the optical fibres being arranged in an array and each emitter end configured for independently directing radiation onto the substrate in use, and wherein at least two laser diodes are coupled with each optical fibre at the opposing end, the method comprising operating each laser diode at a maximum operating output power (Pop) that is less than 50% of its rated maximum power (Pm).
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Dependencies are inferred from the claim text.