"zone plate" meaning in English

{
  "forms": [
    {
      "form": "zone plates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "zone plate (plural zone plates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2012 June 9, “Twinkle, twinkle, little planet”, in The Economist",
          "text": "And Fresnel's countryman, Laurent Koechlin, of the Midi-Pyrénées observatory, thinks zone plates are the way to find out if there is life on other planets.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A Fresnel zone plate."
      ],
      "id": "en-zone_plate-en-noun-utIDZxER",
      "links": [
        [
          "Fresnel zone plate",
          "Fresnel zone plate"
        ]
      ],
      "wikipedia": [
        "zone plate"
      ]
    }
  ],
  "word": "zone plate"
}

{
  "forms": [
    {
      "form": "zone plates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "zone plate (plural zone plates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2012 June 9, “Twinkle, twinkle, little planet”, in The Economist",
          "text": "And Fresnel's countryman, Laurent Koechlin, of the Midi-Pyrénées observatory, thinks zone plates are the way to find out if there is life on other planets.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A Fresnel zone plate."
      ],
      "links": [
        [
          "Fresnel zone plate",
          "Fresnel zone plate"
        ]
      ],
      "wikipedia": [
        "zone plate"
      ]
    }
  ],
  "word": "zone plate"
}