Abstract: A three-dimensional volumetric display includes a light source that generates a two-dimensional image output and a transparent scattering volume, coupled to the light source on a first face of the scattering volume, that scatters the image output of the light source in a direction perpendicular to the light axis of the output of the light source; where the scattering volume comprises a three-dimensional array of printed-ink scattering elements arranged in a plurality of scattering planes tilted relative to the first face of the scattering volume.

Abstract: A three-dimensional volumetric display includes a light source that generates a two-dimensional image output and a transparent scattering volume, coupled to the light source on a first face of the scattering volume, that scatters the image output of the light source in a direction perpendicular to the light axis of the output of the light source; where the scattering volume comprises a three-dimensional array of scattering elements arranged in a plurality of scattering planes tilted relative to the first face of the scattering volume.

Abstract: One variation of a method for manufacturing a physical volumetric representation of a virtual three-dimensional object includes: receiving a series of adjacent cross-sections of the virtual three-dimensional object, including a first cross-section and a second cross-section of the virtual three-dimensional object; depositing a first layer of transparent polymer; curing a portion of the first layer of transparent polymer; with ink, printing an image of the first cross-section onto a dominant face of the first layer; depositing a second layer of transparent polymer over the first layer of transparent polymer; curing a portion of the second layer of transparent polymer; with ink, printing an image of the second cross-section onto a dominant face of the second layer according to an order of the series of cross-sections; and releasing a stack of layers including the first layer of transparent polymer and the second layer of transparent polymer from the build platform.

Abstract: One variation of a method for manufacturing a physical volumetric representation of a virtual three-dimensional object includes: slicing the virtual three-dimensional object into a set of virtual layers of discrete virtual thickness; for each virtual layer in the set of virtual layers, selecting a set of cross-sections of a portion of the virtual three-dimensional object within the virtual layer, setting an opacity level for each cross-section, combining the set of cross-sections into a composite cross-section based on an opacity level set for each cross-section, and printing the composite cross-section onto a dominant face of a substrate in a set of substrates; and assembling the set of substrates into a stack, each substrate in the set of substrates positioned within the stack according to a position within the virtual three-dimensional object of a cross-section printed on the substrate.

Abstract: This invention is a telephone privacy protector to be interposed between a common exchange line and each one of at least two telephones sharing the line. The device includes a voice connecting circuit connected between a respective phone and the line; a control circuit operatively engaging the connecting circuit, and having an on- and an off-state, and a trigger having a threshold voltage responsive to the line voltage controllingly engaging the control circuit to trigger it into its on-state to provide a voice connection between the telephone and the common line in response to the line voltage exceeding said threshold voltage.