{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.0.0",
  "generatedAt": "2026-06-17T23:49:39.838Z",
  "sourcePath": "src/main/data/docs",
  "docId": "10.5594-jj00048",
  "document": {
    "abstract": "IT IS not my intention to present a technical nor mathematical discussion of this subject but rather to present a somewhat simple and practical method by which comparatively short focal length motion picture projection lenses may be compared. For example, a motion picture theatre owner, manager or projectionist hears about some new projection lens which he may buy at a certain cost and then just as he is about to purchase it, another lens at double the cost say, is shown him. Which shall he buy? How can he determine whether or not the latter lens is worth twice as much as the first? How is one better than the other? In other words, he should have some practical means of determining under his own particular conditions, of screen, length of throw, size of picture, etc., which lens to purchase.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "articleType": "orig-research",
    "articleType$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "authors": [
      "S. C. Rogers",
      "L. Olsen"
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
      "holder$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      },
      "year": "1924",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      }
    },
    "copyright$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "docId": "10.5594-jj00048",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from DOI 10.5594/jj00048",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "docLabel": "Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924)",
    "docLabel$meta": {
      "confidence": "medium",
      "note": "Composed from journal title, volume, issue and date",
      "source": "inferred",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "docTitle": "A Method of Comparing the Definition of Projection Lenses",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "docType": "Journal Article",
    "docType$meta": {
      "confidence": "high",
      "note": "journal_metadata XML — SMPTE journal paper",
      "source": "inferred",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "doi": "10.5594/jj00048",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "href": "https://doi.org/10.5594/jj00048",
    "href$meta": {
      "confidence": "high",
      "note": "Constructed from DOI 10.5594/jj00048",
      "source": "inferred",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "issn": {
      "print": "0096-6460",
      "print$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      }
    },
    "issn$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "number": "18",
    "number$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "pages": "136–142",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "publicationDate": "1924-05-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Day absent in source — padded to 01",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "publisher": "SMPTE",
    "publisher$meta": {
      "confidence": "high",
      "note": "Normalised to registry \"SMPTE\" convention from publisher-name (SMPTE)",
      "source": "inferred",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "publisherLocation": {
      "city": "White Plains, NY",
      "city$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      },
      "country": "USA",
      "country$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      }
    },
    "publisherLocation$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Mapped from article_status=\"active\"",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      }
    },
    "volume": "8",
    "volume$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    }
  }
}