See etendue in All languages combined, or Wiktionary
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"3": "étendue",
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"5": "area, expanse; size; extent, range, scale"
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"expansion": "French étendue (“area, expanse; size; extent, range, scale”)",
"name": "bor"
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"etymology_text": "Borrowed from French étendue (“area, expanse; size; extent, range, scale”), short for étendue géométrique (“geometric extent”).",
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{
"ref": "1966, “Advanced Infrared Technology [course title]”, in The University of Michigan Engineering Summer Conferences: Fundamentals of Infrared Technology, June 6–10, 1966; Advanced Infrared Technology, June 27 – July 1, 1966; Precision Radiometry – Calibration and Instrumentation, June 27 – July 1, 1966: Three Intensive One-week Courses for: Engineers, Scientists (University of Michigan Official Publication), volume 67, number 115, Ann Arbor, Mich.: University of Michigan, →OCLC:",
"text": "The topics include […] carefully outlining the concepts of etendue, finesse, and their theoretical implications; methods of spectral, spatial, temporal, and polarization discrimination; and application of these topics to search and track systems.",
"type": "quote"
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{
"ref": "2003, Wolfgang Demtröder, “Spectroscopic Instrumentation”, in Laser Spectroscopy: Basic Concepts and Instrumentation (Advanced Texts in Physics), 3rd edition, Berlin: Springer-Verlag, →DOI, →ISBN, →ISSN, page 149:",
"text": "The light power transmitted to the detector is proportional to the product of the solid angle #92;mathit#123;#92;Omega#125; and area A in the central plane, which is imaged by the lens onto the aperture (often called the étendue U).",
"type": "quote"
},
{
"ref": "2006, Kazuya Ota, Yukata Watanabe, Vadim Banine, Hans Franken, “EUV Source Requirements for EUV Lithography”, in Vivek Bakshi, editor, EUV Sources for Lithography, Bellingham, Wash.: SPIE Press, →ISBN, section 2.2.6 (Etendue of Source Output and Positioning Stability), pages 36–37:",
"text": "Etendue is an optical invariant and is called by many different names. One of the names is \"light-gathering power.\" As implied by this terminology, when light enters an optical system with smaller etendue from another optical system with larger etendue, the former optical system fails to transmit some part of the light. […] Therefore, a given EUV [extreme ultraviolet] power with a larger etendue than that of the requirement is substantially equivalent to a smaller EUV power with the etendue of the requirement.",
"type": "quote"
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"glosses": [
"A conserved property of the light in an optical system which characterizes how \"spread out\" the light is in terms of angle and area: it is the product of its cross-sectional area (normal to the direction of propagation) and the solid angle it subtends."
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"id": "en-etendue-en-noun-w6JkzMPo",
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"(optics) A conserved property of the light in an optical system which characterizes how \"spread out\" the light is in terms of angle and area: it is the product of its cross-sectional area (normal to the direction of propagation) and the solid angle it subtends."
],
"synonyms": [
{
"word": "AΩ product"
},
{
"word": "acceptance"
},
{
"word": "geometric extent"
},
{
"word": "light-collecting power"
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{
"word": "light-gathering power"
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{
"word": "light grasp"
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{
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{
"code": "bg",
"lang": "Bulgarian",
"roman": "geometričen faktor",
"sense": "conserved property of the light in an optical system",
"tags": [
"masculine"
],
"word": "геометричен фактор"
},
{
"code": "fi",
"lang": "Finnish",
"sense": "conserved property of the light in an optical system",
"word": "akseptanssi"
},
{
"code": "fr",
"lang": "French",
"sense": "conserved property of the light in an optical system",
"tags": [
"feminine"
],
"word": "étendue de faisceau"
},
{
"code": "fr",
"lang": "French",
"sense": "conserved property of the light in an optical system",
"tags": [
"feminine"
],
"word": "étendue géométrique"
},
{
"code": "de",
"lang": "German",
"sense": "conserved property of the light in an optical system",
"word": "Etendue"
},
{
"code": "it",
"lang": "Italian",
"sense": "conserved property of the light in an optical system",
"word": "accettanza"
}
]
}
],
"sounds": [
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"tags": [
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{
"ipa": "/ˌeɪ.tɑnˈdu/",
"tags": [
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],
"word": "etendue"
}
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"expansion": "French étendue (“area, expanse; size; extent, range, scale”)",
"name": "bor"
}
],
"etymology_text": "Borrowed from French étendue (“area, expanse; size; extent, range, scale”), short for étendue géométrique (“geometric extent”).",
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{
"ref": "1966, “Advanced Infrared Technology [course title]”, in The University of Michigan Engineering Summer Conferences: Fundamentals of Infrared Technology, June 6–10, 1966; Advanced Infrared Technology, June 27 – July 1, 1966; Precision Radiometry – Calibration and Instrumentation, June 27 – July 1, 1966: Three Intensive One-week Courses for: Engineers, Scientists (University of Michigan Official Publication), volume 67, number 115, Ann Arbor, Mich.: University of Michigan, →OCLC:",
"text": "The topics include […] carefully outlining the concepts of etendue, finesse, and their theoretical implications; methods of spectral, spatial, temporal, and polarization discrimination; and application of these topics to search and track systems.",
"type": "quote"
},
{
"ref": "2003, Wolfgang Demtröder, “Spectroscopic Instrumentation”, in Laser Spectroscopy: Basic Concepts and Instrumentation (Advanced Texts in Physics), 3rd edition, Berlin: Springer-Verlag, →DOI, →ISBN, →ISSN, page 149:",
"text": "The light power transmitted to the detector is proportional to the product of the solid angle #92;mathit#123;#92;Omega#125; and area A in the central plane, which is imaged by the lens onto the aperture (often called the étendue U).",
"type": "quote"
},
{
"ref": "2006, Kazuya Ota, Yukata Watanabe, Vadim Banine, Hans Franken, “EUV Source Requirements for EUV Lithography”, in Vivek Bakshi, editor, EUV Sources for Lithography, Bellingham, Wash.: SPIE Press, →ISBN, section 2.2.6 (Etendue of Source Output and Positioning Stability), pages 36–37:",
"text": "Etendue is an optical invariant and is called by many different names. One of the names is \"light-gathering power.\" As implied by this terminology, when light enters an optical system with smaller etendue from another optical system with larger etendue, the former optical system fails to transmit some part of the light. […] Therefore, a given EUV [extreme ultraviolet] power with a larger etendue than that of the requirement is substantially equivalent to a smaller EUV power with the etendue of the requirement.",
"type": "quote"
}
],
"glosses": [
"A conserved property of the light in an optical system which characterizes how \"spread out\" the light is in terms of angle and area: it is the product of its cross-sectional area (normal to the direction of propagation) and the solid angle it subtends."
],
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"subtend"
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"raw_glosses": [
"(optics) A conserved property of the light in an optical system which characterizes how \"spread out\" the light is in terms of angle and area: it is the product of its cross-sectional area (normal to the direction of propagation) and the solid angle it subtends."
],
"synonyms": [
{
"word": "AΩ product"
},
{
"word": "acceptance"
},
{
"word": "geometric extent"
},
{
"word": "light-collecting power"
},
{
"word": "light-gathering power"
},
{
"word": "light grasp"
},
{
"word": "optical extent"
},
{
"word": "throughput"
}
],
"tags": [
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],
"topics": [
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"natural-sciences",
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"physical-sciences",
"physics"
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"ipa": "/ˌeɪ.tɒnˈd(j)uː/",
"tags": [
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},
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"ipa": "/ˌeɪ.tɑnˈdu/",
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"translations": [
{
"code": "bg",
"lang": "Bulgarian",
"roman": "geometričen faktor",
"sense": "conserved property of the light in an optical system",
"tags": [
"masculine"
],
"word": "геометричен фактор"
},
{
"code": "fi",
"lang": "Finnish",
"sense": "conserved property of the light in an optical system",
"word": "akseptanssi"
},
{
"code": "fr",
"lang": "French",
"sense": "conserved property of the light in an optical system",
"tags": [
"feminine"
],
"word": "étendue de faisceau"
},
{
"code": "fr",
"lang": "French",
"sense": "conserved property of the light in an optical system",
"tags": [
"feminine"
],
"word": "étendue géométrique"
},
{
"code": "de",
"lang": "German",
"sense": "conserved property of the light in an optical system",
"word": "Etendue"
},
{
"code": "it",
"lang": "Italian",
"sense": "conserved property of the light in an optical system",
"word": "accettanza"
}
],
"word": "etendue"
}
Download raw JSONL data for etendue meaning in English (6.0kB)
This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2025-02-22 from the enwiktionary dump dated 2025-02-02 using wiktextract (9e2b7d3 and f2e72e5). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.
If you use this data in academic research, please cite Tatu Ylonen: Wiktextract: Wiktionary as Machine-Readable Structured Data, Proceedings of the 13th Conference on Language Resources and Evaluation (LREC), pp. 1317-1325, Marseille, 20-25 June 2022. Linking to the relevant page(s) under https://kaikki.org would also be greatly appreciated.