Abstract: A method for displaying a preview image, includes: obtaining a real-time image collected by an imaging device of a mobile terminal without turning on a flashlight; determining at least one target area in the real-time image; determining a distance between the mobile terminal and an entity corresponding to each of the at least one target area; determining a brightness enhancement degree for each of the at least one target area respectively according to the distance corresponding to each of the at least one target area and a flashlight parameter of the mobile terminal; and performing brightness enhancement on each of the at least one target area respectively according to the brightness enhancement degree for each of the at least one target area, and displaying the brightness-enhanced real-time image as a preview image.

Abstract: A method for displaying a preview image, includes: obtaining a real-time image collected by an imaging device of a mobile terminal without turning on a flashlight; determining at least one target area in the real-time image; determining a distance between the mobile terminal and an entity corresponding to each of the at least one target area; determining a brightness enhancement degree for each of the at least one target area respectively according to the distance corresponding to each of the at least one target area and a flashlight parameter of the mobile terminal; and performing brightness enhancement on each of the at least one target area respectively according to the brightness enhancement degree for each of the at least one target area, and displaying the brightness-enhanced real-time image as a preview image.

Abstract: The invention provides a gain device having a plurality of channels having a polygonal shape with four or more sides. The invention also provides a method for producing microchannel plates (MCPs) having the steps of providing a pre-polymer; and directing a laser over the pre-polymer into a pre-determined pattern. Also provided is method for efficiently 3D printing an object.

Abstract: The invention provides a gain device having a plurality of channels having a polygonal shape with four or more sides. The invention also provides a method for producing microchannel plates (MCPs) having the steps of providing a pre-polymer; and directing a laser over the pre-polymer into a pre-determined pattern. Also provided is method for efficiently 3D printing an object.

Abstract: The invention provides a gain device having a plurality of channels having a polygonal shape with four or more sides. The invention also provides a method for producing microchannel plates (MCPs) having the steps of providing a pre-polymer; and directing a laser over the pre-polymer into a pre-determined pattern. Also provided is method for efficiently 3D printing an object.

Abstract: The invention provides a gain device having a plurality of channels having a polygonal shape with four or more sides. The invention also provides a method for producing microchannel plates (MCPs) having the steps of providing a pre-polymer; and directing a laser over the pre-polymer into a pre-determined pattern. Also provided is method for efficiently 3D printing an object.

Abstract: A MCP photodetector assembly includes an anode plate including a plurality of electrical traces positioned thereon, a plurality of MCPs and a plurality of grid spacers. The MCPs are positioned between the grid spacers. The grid spacers have a grid spacer shape defining at least one aperture. A plurality of shims are positioned between the grid spacers and the MCPs so as to form a stack positioned on the anode plate. Each of the plurality of shims have a shim shape which is the same as the grid spacer shape such that each of the plurality of shims and each of the plurality of grid spacers overlap so as to define at least one MCP aperture. At least a portion of the plurality of MCPs are positioned within the MCP aperture. The shims are structured to electrically couple the MCPs to the anode plate.