GB1271239A - Calorimetry - Google Patents

Calorimetry

Info

Publication number
GB1271239A
GB1271239A GB4222868A GB4222868A GB1271239A GB 1271239 A GB1271239 A GB 1271239A GB 4222868 A GB4222868 A GB 4222868A GB 4222868 A GB4222868 A GB 4222868A GB 1271239 A GB1271239 A GB 1271239A
Authority
GB
United Kingdom
Prior art keywords
window
laser
absorption
thermistors
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4222868A
Inventor
Edwin Walter Paine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOC Group Ltd
Original Assignee
British Oxigen Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Oxigen Ltd filed Critical British Oxigen Ltd
Priority to GB4222868A priority Critical patent/GB1271239A/en
Publication of GB1271239A publication Critical patent/GB1271239A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K17/00—Measuring quantity of heat
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K17/00—Measuring quantity of heat
    • G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
    • G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

1,271,239. Lasers. BRITISH OXYGEN CO. Ltd. 14 Aug., 1969 [5 Sept., 1968], No. 42228/68. Heading H1C. [Also in Division G1] Apparatus for continuously measuring the power of a beam of photons, electrons or ions comprises a window 6 which transmits the beam with absorption of a known proportion thereof, the heat generated by the absorption being measured by circulating a fluid through a chamber 8 surrounding the window, and measuring the inlet and outlet temperatures by means of thermistors 14, 16. The invention is described with reference to a laser 4 having a semi-transparent window 6 of germanium. The window 6 acts as one of the mirrors of the laser, the laser output being transmitted through the window. Water from a constant pressure source is circulated through the chamber 8 and from the temperature difference measured by the thermistors 14, 16 in the steady state the power of the beam may be found. The absorption coefficient of the window 6 depends in practice on its absolute temperature, and to this end a thermistor 18 is provided to measure this and used to convert the calculated power value to allow for temperature variations of the window 6.
GB4222868A 1968-09-05 1968-09-05 Calorimetry Expired GB1271239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4222868A GB1271239A (en) 1968-09-05 1968-09-05 Calorimetry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4222868A GB1271239A (en) 1968-09-05 1968-09-05 Calorimetry

Publications (1)

Publication Number Publication Date
GB1271239A true GB1271239A (en) 1972-04-19

Family

ID=10423439

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4222868A Expired GB1271239A (en) 1968-09-05 1968-09-05 Calorimetry

Country Status (1)

Country Link
GB (1) GB1271239A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019381A (en) * 1976-01-12 1977-04-26 The United States Of America As Represented By The Secretary Of The Army Transparent optical power meter
EP0089437A1 (en) * 1982-03-23 1983-09-28 Majestic Wiley Contractors Limited Method of and apparatus for measuring the power output of lasers
US4440506A (en) * 1982-04-05 1984-04-03 The United States Of America As Represented By The Secretary Of The Army Laser power meter
US5156459A (en) * 1989-09-01 1992-10-20 The United States Of America As Represented By The United States Department Of Energy Radiation beam calorimetric power measurement system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019381A (en) * 1976-01-12 1977-04-26 The United States Of America As Represented By The Secretary Of The Army Transparent optical power meter
EP0089437A1 (en) * 1982-03-23 1983-09-28 Majestic Wiley Contractors Limited Method of and apparatus for measuring the power output of lasers
US4440506A (en) * 1982-04-05 1984-04-03 The United States Of America As Represented By The Secretary Of The Army Laser power meter
US5156459A (en) * 1989-09-01 1992-10-20 The United States Of America As Represented By The United States Department Of Energy Radiation beam calorimetric power measurement system

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