GB1449056A - Lasers - Google Patents

Lasers

Info

Publication number
GB1449056A
GB1449056A GB3741073A GB3741073A GB1449056A GB 1449056 A GB1449056 A GB 1449056A GB 3741073 A GB3741073 A GB 3741073A GB 3741073 A GB3741073 A GB 3741073A GB 1449056 A GB1449056 A GB 1449056A
Authority
GB
United Kingdom
Prior art keywords
gas
inlet
exhaust
aug
flow rate
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
GB3741073A
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
BOC International 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 BOC International Ltd filed Critical BOC International Ltd
Priority to GB3741073A priority Critical patent/GB1449056A/en
Priority to AU72100/74A priority patent/AU489728B2/en
Publication of GB1449056A publication Critical patent/GB1449056A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/03—Constructional details of gas laser discharge tubes
    • H01S3/036—Means for obtaining or maintaining the desired gas pressure within the tube, e.g. by gettering, replenishing; Means for circulating the gas, e.g. for equalising the pressure within the tube

Abstract

1449056 Separating helium from gas mixtures BOC INTERNATIONAL Ltd 7 Aug 1974 [7 Aug 1973] 37410/73 Heading B1L [Also in Division H1] In a gas laser in which a 75% He, 15% N and 10% CO 2 active gas medium flows through a gas tube 1 from an inlet to an exhaust, the helium content of the exhaust gas is substantially recovered by diffusion through one or more semi-permeable membranes 5 and is then used to augment the fresh gases 9 applied to the laser inlet. A high gas flow rate system is shown which includes a blower 2 and compressor 3 in the exhaust gas path leading to gas fractionation units 4, 7. Each unit includes at least one fluorinated ethylene propylene copolymer membrane 0.001 inch thick, and at least 3 square metres in area. Both units are coupled in parallel to a water vapour and impurity trap 8 and a controlling valve 9 in the inlet path. A low gas flow rate system may alternatively be used comprising a vacuum pump 2 and an oil vapour trap 3.
GB3741073A 1973-08-07 1973-08-07 Lasers Expired GB1449056A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3741073A GB1449056A (en) 1973-08-07 1973-08-07 Lasers
AU72100/74A AU489728B2 (en) 1973-08-07 1974-08-07 Lasers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3741073A GB1449056A (en) 1973-08-07 1973-08-07 Lasers

Publications (1)

Publication Number Publication Date
GB1449056A true GB1449056A (en) 1976-09-08

Family

ID=10396276

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3741073A Expired GB1449056A (en) 1973-08-07 1973-08-07 Lasers

Country Status (1)

Country Link
GB (1) GB1449056A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550409A (en) * 1981-09-17 1985-10-29 United Kingdom Atomic Energy Authority Induced flow gas transport laser
EP0263994A1 (en) * 1986-09-30 1988-04-20 Siemens Aktiengesellschaft Device for producing a gas mixture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550409A (en) * 1981-09-17 1985-10-29 United Kingdom Atomic Energy Authority Induced flow gas transport laser
EP0263994A1 (en) * 1986-09-30 1988-04-20 Siemens Aktiengesellschaft Device for producing a gas mixture
US4803693A (en) * 1986-09-30 1989-02-07 Siemens Aktiengesellschaft Device for the preparation of a gas mixture

Also Published As

Publication number Publication date
AU7210074A (en) 1976-02-12

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Legal Events

Date Code Title Description
PS Patent sealed