Abstract: Methods, systems, and apparatuses for a hyperspectral plenoptic camera. A hyperspectral plenoptic camera may be configured with a filter in the aperture plane of the camera. The filter may selectively transmit radiated wavelengths to a microlens array, which may focus and transmit the wavelengths to an image sensor based on, e.g., the location and intensity of the wavelengths. One or more lenses and/or an iris may be configured to collect, focus, and/or transmit wavelengths to and from the filter. The filter may be located between two lenses, and the distance between the two lenses may be based on a diameter of an aperture of the plenoptic camera.

Abstract: Chuck mechanisms quickly connect and enable quick disconnection of an impeller shaft of a mixer from the drive shaft of the motor unit. A spindle has a keyway which enables a key, either a detent key which is movable in the keyway or a key which is provided by pins extending from the shaft, to be aligned in locking position where the key transfers the thrust from the spindle to the shaft or an unlocked position where the shaft is rotated out of the locking position and may be removed from the spindle. The key is retained in locking position by an outer sleeve or collar having a slot which enables the key to move away from the shaft when the shaft is rotated to the unlocked position. When the collar is rotated to move the slot away from the key, the key is locked against outward movement.