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|  __ \\   |  ___||  /_   _// | || | || |  __ \\  
| |  \ ||  | ||__    `-| |,-  | || | || | |  \ || 
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|_____//   |_____||    |_||    \____//  |_____//  
 -----`    `-----`     `-`'     `---`    -----`

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Text this: Generation of radially polarized beam with a segmented spiral varying retarder