DE2900390A1 - Control unit for excitation laser - has photodetector to count or monitor energy valve for medical control - Google Patents

Control unit for excitation laser - has photodetector to count or monitor energy valve for medical control

Info

Publication number
DE2900390A1
DE2900390A1 DE19792900390 DE2900390A DE2900390A1 DE 2900390 A1 DE2900390 A1 DE 2900390A1 DE 19792900390 DE19792900390 DE 19792900390 DE 2900390 A DE2900390 A DE 2900390A DE 2900390 A1 DE2900390 A1 DE 2900390A1
Authority
DE
Germany
Prior art keywords
photodetector
count
control unit
laser beam
excitation laser
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.)
Withdrawn
Application number
DE19792900390
Other languages
German (de)
Inventor
Sd Mehdi Ramshad
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19792900390 priority Critical patent/DE2900390A1/en
Publication of DE2900390A1 publication Critical patent/DE2900390A1/en
Withdrawn legal-status Critical Current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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating

Abstract

A control unit is for an intermittent excitation laser as used in medical applications. A detector is placed in the laser beam so that a count or total energy value can be used as a threshold for switching off the source. The detector is a partially reflecting mirror which reflects 10% at most, and usually 2 to 5%, of the laser beam into the photodetector.

Description

Vorrichtung zum Emittieren von inter- Device for emitting inter-

mittierendem Licht" Die Erfindung bezieht sich auf eine Vorrichtung zum Emittieren von intermittierendem Licht, bestehend aus einer Laserstrahl-Quelle, die intermittierend angeregt wird. Beispielsweise werden solche Vorrichtungen in der Medizin verwendet. emitting light "The invention relates to a device for emitting intermittent light, consisting of a laser beam source, which is stimulated intermittently. For example, such devices are described in used in medicine.

Bei bekannten Vorrichtungen dieser Art kann es vorkommen, daß die Laserstrahl-Quelle trotz Anregung kurzzeitig oder auch länger kein Licht aussendet.In known devices of this type it can happen that the The laser beam source does not emit light for a short time or for a longer period despite being stimulated.

Der Erfindung liegt die. Aufgabe zugrunde, diesen Nachteil zu beseitigen.The invention lies in the. Task is based on eliminating this disadvantage.

Diese Aufgabe wird gelöst durch einen im Strahlengang angeordneten Detektor, der die Zahl und/oder die sich aufsummierende Energie der Lichtimpulse erfaßt, wobei die Abschaltung der Laserstrahl-Quelle erfolgt, wenn ein vorher eingestellter Zahlen- und/oder Energiewert erreicht ist.This object is achieved by a arranged in the beam path Detector that shows the number and / or the accumulated energy of the light pulses detected, with the laser beam source being switched off if a previously set Numerical and / or energy value is reached.

Auf diese Weise wird vermieden, daß die Zahl bzw. die Energie der ausgesendeten Lichtimpulse kleiner ist als vorgesehen.In this way it is avoided that the number or the energy of emitted light pulses is smaller than intended.

Weitere Einzelheiten der Erfindung ergeben sich aus der Zeichnung, in der ein Ausführungsbeispiel veranschaulicht ist.Further details of the invention emerge from the drawing, in which an embodiment is illustrated.

Darin ist mit 1 eine Laserstrahl-Quelle, mit 2 ein Detektor und mit 3 eine elektrische bzw. elektronische Einheit bezeichnet. Die von der Laserstrahl-Quelle ausgehenden Lichtimpulse längs des Strahlenganges 4 durchlaufen den Detektor 2, der ihre Zahl oder ihre Energie erfaßt und diesen Wert der Einheit 3 übergibt. Letztere triggert über die Leitung 5 die Laserstrahl-Quelle 1.With 1 there is a laser beam source, with 2 a detector and with 3 denotes an electrical or electronic unit. The one from the laser beam source outgoing light pulses along the beam path 4 pass through the detector 2, the their number or their energy is recorded and this value is transferred to the unit 3. Latter triggers the laser beam source 1 via the line 5.

Claims (3)

Ansprüche : 0 Vorrichtung zum Emittieren von intermittierendem Licht, bestehend aus einer Laserstrahl-Quelle, die intermittierend angeregt wird, g e k e n n z e i c h n e t durch einen im Strahlengang (4) angeordneten Detektor (2), der die Zahl und/oder die sich aufsummierende Energie der Lichtimpulse erfaßt, wobei die Abschaltung der Laserstrahl-Quelle (1) erfolgt, wenn ein vorher eingestellter Zahlen- oder Energiewert erreicht ist. Claims: 0 device for emitting intermittent light, consisting of a laser beam source that is excited intermittently, g e k e n n z e i c h n e t by a detector (2) arranged in the beam path (4), which detects the number and / or the cumulative energy of the light pulses, wherein the laser beam source (1) is switched off if a previously set Numerical or energy value is reached. 2. Vorrichtung nach Anspruch 1, dadurch g e k e n n z e i c h -n e t , daß der Detektor (2) aus einem halbdurchlässigen Spiegel, der in dem Strahlengang (4) angeordnet ist, und einem Photodetektor besteht, der im herausgespiegelten Strahlengang angeordnet ist. 2. Apparatus according to claim 1, characterized in that g e k e n n z e i c h -n e t that the detector (2) consists of a semitransparent mirror, which is in the beam path (4) is arranged, and a photodetector is in the reflected beam path is arranged. 3. Vorrichtung nach Anspruch 2, dadurch g e k e n n -z e i c h n e t , daß der halbdurchlässige Spiegel höchstens 10%, vorzugsweise ca. 2 - 5% des einfallenden Lichtes herausspiegelt.3. Apparatus according to claim 2, characterized in that g e k e n n -z e i c h n e t that the semitransparent mirror is at most 10%, preferably about 2 - 5% of the incident light reflected out.
DE19792900390 1979-01-04 1979-01-04 Control unit for excitation laser - has photodetector to count or monitor energy valve for medical control Withdrawn DE2900390A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792900390 DE2900390A1 (en) 1979-01-04 1979-01-04 Control unit for excitation laser - has photodetector to count or monitor energy valve for medical control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792900390 DE2900390A1 (en) 1979-01-04 1979-01-04 Control unit for excitation laser - has photodetector to count or monitor energy valve for medical control

Publications (1)

Publication Number Publication Date
DE2900390A1 true DE2900390A1 (en) 1980-07-17

Family

ID=6060121

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792900390 Withdrawn DE2900390A1 (en) 1979-01-04 1979-01-04 Control unit for excitation laser - has photodetector to count or monitor energy valve for medical control

Country Status (1)

Country Link
DE (1) DE2900390A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065223A1 (en) * 1981-05-08 1982-11-24 Sumitomo Electric Industries Limited Laser control device with interval timer
US5140600A (en) * 1990-11-28 1992-08-18 Lambda Physik Gesellschaft Zur Herstellung Von Lasern Mbh Method of controlling the total energy amount of a plurality of laser pulses
DE4438389A1 (en) * 1994-10-27 1996-05-02 Zeiss Carl Fa Method and arrangement for exciting a gas laser via a high voltage discharge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065223A1 (en) * 1981-05-08 1982-11-24 Sumitomo Electric Industries Limited Laser control device with interval timer
US5140600A (en) * 1990-11-28 1992-08-18 Lambda Physik Gesellschaft Zur Herstellung Von Lasern Mbh Method of controlling the total energy amount of a plurality of laser pulses
DE4438389A1 (en) * 1994-10-27 1996-05-02 Zeiss Carl Fa Method and arrangement for exciting a gas laser via a high voltage discharge
US5822344A (en) * 1994-10-27 1998-10-13 Carl-Zeiss-Stiftung Process and arrangement for the excitation of a gas laser by means of a high voltage discharge

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Legal Events

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8139 Disposal/non-payment of the annual fee