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    "abstract": "The reasons that make it desirable for the motion picture studio to employ large floodlighting units are the high levels of illumination required for high speed photography and the peculiar sensitivity characteristic of the photographic film. These two factors indicate the use of a high intensity arc, and there is a national tendency to take the high intensity searchlight just ae it has been developed for military service and by refocusing got a beam of wide spread. The defects of this method are illustrated and it is shown that a more suitable optical arrangement is to use apolygonal mirror rather than aparaboloid. The method ofcomputing the dimensions of the polygons is given along with data on a photometric comparison of the two types of reflectors.",
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    "authors": [
      "Frank Benford",
      "M. W. Palmer"
    ],
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
        "source": "parsed",
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        "version": "smpte-journal-article-nlm@v1"
      },
      "year": "1927",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
        "source": "parsed",
        "updated": "2026-05-22T19:19:44.900Z",
        "version": "smpte-journal-article-nlm@v1"
      }
    },
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      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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      "version": "smpte-journal-article-nlm@v1"
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    "docId": "10.5594-J06617",
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      "note": "Derived from DOI 10.5594/J06617",
      "source": "parsed",
      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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    "docLabel": "Transactions of the Society of Motion Picture Engineers ( Volume: 11, Issue: 29, July 1927)",
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    "docTitle": "A Polygonal Floodlighting Mirror",
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      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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      "version": "smpte-journal-article-nlm@v1"
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    "doi": "10.5594/J06617",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
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    "href": "https://doi.org/10.5594/J06617",
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      "confidence": "high",
      "note": "Constructed from DOI 10.5594/J06617",
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      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
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    "issn": {
      "print": "0096-6460",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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        "updated": "2026-05-22T19:19:44.900Z",
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    "issn$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
      "version": "smpte-journal-article-nlm@v1"
    },
    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_11_29/MIJR15Vol11No29.xml)",
      "source": "parsed",
      "updated": "2026-06-16T16:11:59.617Z",
      "version": "smpte-journal-issue-xml@v1"
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    "number": "29",
    "number$meta": {
      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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    "pages": "109–121",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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    "publicationDate": "1927-07-01",
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      "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)",
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      "city": "White Plains, NY",
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        "confidence": "high",
        "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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        "updated": "2026-05-22T19:19:44.900Z",
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      "country": "USA",
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        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_11_29/MIJR15Vol11No29.xml)",
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      "confidence": "high",
      "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06617.xml)",
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      "updated": "2026-05-22T19:19:44.900Z",
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    "volume": "11",
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