2results about How to "Prolong formation time" patented technology

An optical element and imaging intervention device for light field modulation are disclosed. The optical element includes a lens substrate having a radial direction and a thickness direction perpendicular to the radial direction. A central visual region and a slow-light modulation region are formed on the lens substrate. The central visual region is formed in the middle of the lens substrate, and the slow-light modulation region is arranged around the central visual region. The slow-light modulation region includes multiple photonic crystals arranged in an array on the lens substrate to reduce the group velocity of light passing through the slow-light modulation region. This optical element can effectively control myopia.

This invention relates to the field of waste heat recovery technology, and more particularly to a waste heat recovery device and method for power plants. The waste heat recovery device for power plants includes: a tank, sealing plates, and heat exchange components; the tank includes a cylindrical body and end caps located at both ends of the cylindrical body; the sealing plates are disposed at both ends of the cylindrical body, and the two sealing plates and the cylindrical body form a heat exchange chamber, the sealing plates and the end caps forming a flue gas chamber; the heat exchange components are disposed within the heat exchange chamber, with both ends rotatably mounted on the sealing plates, including a first heat exchange component and a second heat exchange component, the first heat exchange component being nested within the second heat exchange component; gears are disposed on the sealing plates, and the rotation of the gears can drive the first and second heat exchange components to rotate in opposite directions. This invention allows fluids far from the heat exchange tubes to directly contact the heat exchange tubes, improving heat transfer efficiency and achieving full heat recovery.