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  ______   __   __    ______     ___     __   __  
 /_   _//  \ \\/ //  /_   _//   / _ \\   \ \\/ // 
   | ||     \ ` //     | ||    | / \ ||   \   //  
  _| ||      | ||     _| ||    | \_/ ||   / . \\  
 /__//       |_||    /__//      \___//   /_//\_\\ 
 `--`        `-`'    `--`       `---`    `-`  --`

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Text this: Compound diffractive lens consisting of fresnel zone plate and frequency selective screen