A laser recording method is for processing a recording object with laser light emitted from a laser light source. The laser recording method includes: detecting a moving speed of the recording object with a location of the laser light source when the laser light source emits laser light, as an observation point, while moving at least one of the recording object and the laser light source; and correcting power output of the laser light set such that an amount of energy applied by the laser light per unit area of the recording object is constant even if the moving speed is changed, to compensate energy loss derived from thermal diffusion occurring on the recording object based on the moving speed detected at the detecting.

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 (P.sub.op) sufficiently below their rated maximum power (P.sub.m) 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 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 (P.sub.op) sufficiently below their rated maximum power (P.sub.m) 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 light emitting device includes: a base plate extending in a first direction; a plurality of light emitting units arranged over a front surface of the base plate while being shifted from each other in the first direction, and each including a support body extending in the first direction and a plurality of light sources supported on the support body while being arranged in the first direction; a flow path disposed on a side of the base plate opposite to a side facing the light emitting units to feed air therethrough in the first direction; and a wire electrically connected to at least one of the plurality of the light emitting units, and disposed inside the flow path.

Some examples include a fuser assembly to operate with a roller including a fuser housing, and an array of fusers disposed in the fuser housing, each fuser including a heating element exposed along a surface of the fuser housing and adjacent to an outer surface of the roller.

Some examples include a fuser assembly to operate with a roller including a fuser housing, and an array of fusers disposed in the fuser housing, each fuser including a heating element exposed along a surface of the fuser housing and adjacent to an outer surface of the roller.

A laser marking system (10) comprises a marking controller (11) operable to control a plurality of laser diodes (13) to emit light through optical fibre (14) such that the emitting, ends of the optical fibres (14) form a multi-emitter array. Light emitted from the emitting ends of the optical fibres (14) is focussed by a lensing arrangement (15) on a substrate (16). The lensing arrangement (15) is substantially telecentric such that the non-telecentric angle, θ.sub.t, of the telecentric lens assembly satisfies (Formula I) where θ.sub.1/2 is the half angle divergence of the emitter beam and 1/F is the fraction of the emitter spot diameter d.sub.o that corresponds to the maximum acceptable displacement in the image plane.

A laser marking system (10) comprises a marking controller (11) operable to control a plurality of laser diodes (13) to emit light through optical fibre (14) such that the emitting, ends of the optical fibres (14) form a multi-emitter array. Light emitted from the emitting ends of the optical fibres (14) is focussed by a lensing arrangement (15) on a substrate (16). The lensing arrangement (15) is substantially telecentric such that the non-telecentric angle, θ.sub.t, of the telecentric lens assembly satisfies (Formula I) where θ.sub.1/2 is the half angle divergence of the emitter beam and 1/F is the fraction of the emitter spot diameter d.sub.o that corresponds to the maximum acceptable displacement in the image plane.

An optical apparatus according to an embodiment of the present disclosure is an apparatus that performs one or both of writing and erasing of information with respect to a reversible recording medium. This optical apparatus includes a plurality of laser devices varying in emission wavelength in a near infrared region (700 nm to 2500 nm), an optical system that multiplexes laser beams outputted from the plurality of laser devices, and a scanner unit that scans a multiplexed light beam obtained by multiplexing by the optical system, on the reversible recording medium.

An optical apparatus according to an embodiment of the present disclosure is an apparatus that performs one or both of writing and erasing of information with respect to a reversible recording medium. This optical apparatus includes a plurality of laser devices varying in emission wavelength in a near infrared region (700 nm to 2500 nm), an optical system that multiplexes laser beams outputted from the plurality of laser devices, and a scanner unit that scans a multiplexed light beam obtained by multiplexing by the optical system, on the reversible recording medium.