Abstract: Disclosed are a quick-release plate assembly and a tripod. The quick-release plate assembly is applied to a pan-tilt, including: a base and a quick-release plate. The base is provided with a sliding groove and a plurality of stopping portions, the sliding groove is penetrating through the base, each end of the sliding groove is provided with a protruding stopping portion. The quick-release plate slidably is arranged in the sliding groove, one side of the quick-release plate towards the sliding groove is provided with an abutting convex portion corresponding to two ends of the sliding groove, the quick-release plate can slide back and forth along the sliding groove, and the abutting convex portion can abut against the protruding stopping portion. At least one stopping portion is movably arranged on the base, to make the protruding stopping portion match a position of a corresponding abutting convex portion.

Abstract: The present disclosure relates to an airtightness detection equipment for detecting the airtightness of a pedestal on which a target is mounted, comprising: a sealing device configured to hermetically adhere to the pedestal, forming a sealed space between the sealing device and the pedestal; a vacuum pumping device configured to evacuate the sealed space; a gas detection device configured to detect gas in the sealed space.

Abstract: A starter has a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear and a switch box configured to turn on the electric motor. The output gear is driven by the electric motor via the speed reduction device and the clutch. The starter also has a stationary axle on which the output gear is installed. The electric motor has an output shaft. The speed reduction device has a drive gear fixed to the output shaft and a driven gear meshed with the drive gear, the driven gear being rotatably mounted to the axle via a bushing.

Abstract: An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.

Abstract: An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.