Abstract: A jetting device configured to jet one or more droplets of a viscous medium through a nozzle may include an acoustic transducer configured to emit an acoustic signal that transfers acoustic waves into at least a portion of the viscous medium located in a viscous medium conduit a viscous medium conduit configured to direct a flow of the viscous medium to an outlet of the nozzle. The acoustic signal may be an ultrasonic signal. The acoustic signal may adjust one or more rheological properties of the viscous medium, based on acoustic actuation. The acoustic transducer may be implemented by an actuator of the device that is configured to move through an eject chamber to cause viscous medium to be jetted through the outlet of the nozzle as one or more droplets.

Abstract: A jetting device configured to jet one or more droplets of a viscous medium through the outlet of a nozzle includes an energy output device. The energy output device is configured to direct a quantum of energy into at least a portion of the volume of the viscous medium jetted through the outlet to control a breaking of the droplet from the nozzle. The energy output device may include an acoustic transducer or a piezoelectric material or a laser emitter or a heater.

Abstract: A jetting device configured to jet one or more droplets of a viscous medium through a nozzle may include an acoustic transducer configured to emit an acoustic signal that transfers acoustic waves into at least a portion of the viscous medium located in a viscous medium conduit a viscous medium conduit configured to direct a flow of the viscous medium to an outlet of the nozzle. The acoustic signal may be an ultrasonic signal. The acoustic signal may adjust one or more rheological properties of the viscous medium, based on acoustic actuation. The acoustic transducer may be implemented by an actuator of the device that is configured to move through an eject chamber to cause viscous medium to be jetted through the outlet of the nozzle as one or more droplets.

Abstract: A jetting device configured to jet one or more droplets of a viscous medium through the outlet of a nozzle includes an energy output device. The energy output device is configured to direct a quantum of energy into at least a portion of the volume of the viscous medium jetted through the outlet to control a breaking of the droplet from the nozzle. The energy output device may include an acoustic transducer or a piezoelectric material or a laser emitter or a heater.

Abstract: An optical arrangement includes a focusing lens and a plurality of light sources. The focusing lens is configured to focus a plurality of light beams to form an array of virtual light sources in an image plane. The plurality of light sources are configured to emit the plurality of light beams such that the light beams cross each other in a plane.

Abstract: An aperture stop assembly for use in an electromagnetic radiation system may include an aperture stop made of a material at least partly transparent to an applied electromagnetic radiation. At least a portion of the aperture stop may be formed at an edge of an aperture to deflect electromagnetic radiation into the at least partially transparent material.

Abstract: An aperture stop assembly for use in an electromagnetic radiation system may include an aperture stop made of a material at least partly transparent to an applied electromagnetic radiation. At least a portion of the aperture stop may be formed at an edge of an aperture to deflect electromagnetic radiation into the at least partially transparent material.