Abstract: The present disclosure provides a lightweight two-stage pressure regulator for controlling the flow of gas from a high pressure source. The two stage pressure regulator comprises a gas inlet, a first piston pressure regulator stage, a second piston pressure regulator stage and a gas outlet. The first piston pressure regulator stage and the second piston pressure regulator stage are arranged to be coaxial such that the gas flow path is substantially along the axis of the first and second piston regulator stages.

Abstract: The present disclosure provides a lightweight two-stage pressure regulator for controlling the flow of gas from a high pressure source. The two stage pressure regulator comprises a gas inlet, a first piston pressure regulator stage, a second piston pressure regulator stage and a gas outlet. The first piston pressure regulator stage and the second piston pressure regulator stage are arranged to be coaxial such that the gas flow path is substantially along the axis of the first and second piston regulator stages.

Abstract: A system for measuring intensity distribution of light includes a carbon nanotube array located on a surface of a substrate, a reflector and an imaging element. The carbon nanotube array absorbs photons of a light source and radiates a visible light. The reflector is used to reflect the visible light, and the reflector is spaced from the carbon nanotube array. The carbon nanotube array is located between the reflector and the substrate. The imaging element is used to image the visible light. The imaging element is spaced from the substrate.

Abstract: A method for measuring intensity distribution of light includes a step of providing a carbon nanotube array located on a surface of a substrate. The carbon nanotube array has a top surface away from the substrate. The carbon nanotube array with the substrate is located in an inertia environment or a vacuum environment. A light source irradiates the top surface of the carbon nanotube array, to make the carbon nanotube array radiate a visible light. A reflector is provided, and the visible light is reflected by the reflector. An imaging element images the visible light reflected by the reflector, to obtain an intensity distribution of the light source.

Abstract: A method for measuring intensity distribution of light includes a step of providing a carbon nanotube array located on a surface of a substrate. The carbon nanotube array has a top surface away from the substrate. The carbon nanotube array with the substrate is located in an inertia environment or a vacuum environment. A light source irradiates the top surface of the carbon nanotube array, to make the carbon nanotube array radiate a visible light. A reflector is provided, and the visible light is reflected by the reflector. An imaging element images the visible light reflected by the reflector, to obtain an intensity distribution of the light source.

Abstract: A system for measuring intensity distribution of light includes a carbon nanotube array located on a surface of a substrate, a reflector and an imaging element. The carbon nanotube array absorbs photons of a light source and radiates a visible light. The reflector is used to reflect the visible light, and the reflector is spaced from the carbon nanotube array. The carbon nanotube array is located between the reflector and the substrate. The imaging element is used to image the visible light. The imaging element is spaced from the substrate.