JPS61237486A - Laser device - Google Patents

Laser device

Info

Publication number
JPS61237486A
JPS61237486A JP7850485A JP7850485A JPS61237486A JP S61237486 A JPS61237486 A JP S61237486A JP 7850485 A JP7850485 A JP 7850485A JP 7850485 A JP7850485 A JP 7850485A JP S61237486 A JPS61237486 A JP S61237486A
Authority
JP
Japan
Prior art keywords
mirror
resonator
plane
concave
space
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.)
Granted
Application number
JP7850485A
Other languages
Japanese (ja)
Other versions
JPH0350426B2 (en
Inventor
Toshio Yoshida
寿夫 吉田
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7850485A priority Critical patent/JPS61237486A/en
Publication of JPS61237486A publication Critical patent/JPS61237486A/en
Publication of JPH0350426B2 publication Critical patent/JPH0350426B2/ja
Granted 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
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/0818—Unstable resonators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

PURPOSE:To oscillate both laser beams by an unstable type resonator and laser beams by a stable type resonator by fitting the unstable type resonator and the stable type resonator using a concave mirror in common and taking in and out a plane mirror to a resonator space. CONSTITUTION:A concave mirror 4 and a convex mirror 5 constituting an unstable type resonator and a beam-extracting mirror 6 are disposed. A plane mirror 11 is set up immediately before the beam-extracting mirror 6, a partial reflecting mirror 12 is mounted to an oscillator box body 1 so that a stable type resonator is constituted by said concave mirror 4 and the plane mirror 11, and a mirror-moving mechanism 13 taking in and out said plane mirror to a resonator space is housed in the oscillator box body 1. In such constitution, the unstable type resonator is organized by the concave mirror 4, the convex mirror 5 and the beam-extracting mirror 6 when the plane mirror 11 is extracted from the resonator space by the mirror-moving mechanism 13, and the stable type resonator is constructed by the concave mirror 4, the plane mirror 11 and the partial reflecting mirror 12 when the plane mirror 11 is introduced into the resonator space.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、例えば切断、溶接、表面改質などの加工に
用いられるレーザ装置、特に安定型共振器と不安定型共
振器との切換方式に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a laser device used for processing such as cutting, welding, and surface modification, and in particular to a switching method between a stable resonator and an unstable resonator. It is something.

〔従来の技術〕[Conventional technology]

第２図は従来のレーザ装置を示す断面図である。 FIG. 2 is a sectional view showing a conventional laser device.

図において（１）は発振器筐体、（２）はこの発振器筐
体に収納された電極、（３）はこの対向した電極にはさ
まれた放電励起空間、（４）および（５）はこの放電励
起空間をはさみ互いに対向するように固定された凹面鏡
および凸面鏡、（６）はこの凸面鏡の直前に設けられた
ビーム取り出し鏡、（力は凹面鏡と凸面鏡とビーム取り
出し鏡からなる不安定型共振器の光軸上の発振器筐体に
取り付けられたビーム取り出し窓、（８）はレーザビー
ムである。In the figure, (1) is the oscillator housing, (2) is the electrode housed in this oscillator housing, (3) is the discharge excitation space sandwiched between these opposing electrodes, and (4) and (5) are this A concave mirror and a convex mirror are fixed to face each other across the discharge excitation space, and (6) is a beam extraction mirror installed just before the convex mirror. A beam extraction window (8) attached to the oscillator housing on the optical axis is a laser beam.

従来のレーザ装置は上記のように構成され、放電励起空
間（３）のレーザ媒質を電極（２）間の放電によって励
起し、この放電励起空間をはさんで設置された凹面鏡（
４）と凸面鏡（５）によって、励起されたレーザ媒質中
の光は共振しながら増幅されている。The conventional laser device is configured as described above, in which the laser medium in the discharge excitation space (3) is excited by the discharge between the electrodes (2), and the concave mirror (
4) and a convex mirror (5), the excited light in the laser medium is amplified while resonating.

例えば凹面鏡（４）と凸面鏡（５）とが共焦点型の不安
定型共振器の場合、凸面鏡（５）によって反射された球
面波はレーザ媒質中を増幅されながら伝搬し、凹面鏡（
４）に入射する。この凹面鏡（４）から反射された平行
なビーム（平面波）はレーザ媒質中を増幅されながら伝
搬し、ビーム取り出し鏡（６）に入射する。For example, when the concave mirror (4) and the convex mirror (5) are confocal unstable resonators, the spherical wave reflected by the convex mirror (5) propagates in the laser medium while being amplified, and the concave mirror (
4). The parallel beam (plane wave) reflected from this concave mirror (4) propagates in the laser medium while being amplified, and enters the beam extraction mirror (6).

このビーム取り出し鏡（６）から反射した円環状のレー
ザビーム（８）は、ビーム取り出し窓（７）を透過して
大気に取り出されている。この不安定型共振器を備え九
レーザ装置から発振する円環状のレーザビーム（８）は
溶接に適しているが、切断や表面改質には適していない
ことが知られている。The annular laser beam (8) reflected from the beam extraction mirror (6) passes through the beam extraction window (7) and is extracted into the atmosphere. It is known that the annular laser beam (8) emitted from a nine-laser device equipped with this unstable resonator is suitable for welding, but is not suitable for cutting or surface modification.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記のような従来のレーザ装置では、凹面鏡（４）と凸
面鏡（５）とビーム取り出し鏡（６）から構成される不
安定型共振器だけが備えられているために、溶接に適し
た円環状のレーザビームだけしか発振できないという問
題があった。The conventional laser device described above is equipped with only an unstable resonator consisting of a concave mirror (4), a convex mirror (5), and a beam extraction mirror (6). There was a problem in that only the laser beam could be oscillated.

この発明は、かかる問題点を解決するためになされたも
ので、溶接に適した不安定型共振器によるレーザビーム
と、切断や表面改質に適した安定型共振器によるレーザ
ビームとの何れのレーザビームをも発振させることがで
きるレーザ装置を得ることを目的とする。This invention was made to solve these problems, and it is possible to use either a laser beam using an unstable resonator suitable for welding or a laser beam using a stable resonator suitable for cutting or surface modification. The object of the present invention is to obtain a laser device that can also oscillate a beam.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係るレーザ装置は、不安定型共振器を構成す
る凹面鏡と凸面鏡及びビーム取り出し鏡を配設し、この
ビーム取り出し鏡の直前に平面鏡を設け、上記凹面鏡と
この平面鏡とで安定型共振器を構成するように部分反射
鏡を発振器筐体に取り付け、上記平面鏡を共振器空間に
対して出し入れする鏡移動機構を発振器筐体内に収納し
たものである。The laser device according to the present invention includes a concave mirror, a convex mirror, and a beam extraction mirror that constitute an unstable resonator, a plane mirror is provided immediately before the beam extraction mirror, and the concave mirror and the plane mirror form a stable resonator. A partial reflecting mirror is attached to an oscillator housing so as to constitute a mirror, and a mirror moving mechanism for moving the plane mirror in and out of the resonator space is housed within the oscillator housing.

〔作　用〕[For production]

この発明において平面鏡を共振器空間から出したときは
、凹面鏡と凸面鏡とビーム取り出し鏡から構成された不
安定型共振器によるレーザビームが発振する。また、平
面鏡を共振器空間へ入れたときは、凹面鏡と平面鏡と部
分反射鏡から構成された安定型共振器によるレーザビー
ムが発振する。In this invention, when the plane mirror is taken out of the resonator space, a laser beam is oscillated by an unstable resonator composed of a concave mirror, a convex mirror, and a beam extraction mirror. Furthermore, when a plane mirror is inserted into the resonator space, a laser beam is oscillated by a stable resonator composed of a concave mirror, a plane mirror, and a partially reflecting mirror.

〔実施例〕〔Example〕

第１図はこの発明の一実施例を示す断面図であり　、（
１）〜（７）は上記従来装置と同一のものである。FIG. 1 is a sectional view showing an embodiment of the present invention.
1) to (7) are the same as those of the conventional device described above.

αυはビーム取り出し鏡（６）の直前に配置された平面
鏡、αつは凹面鏡（４）と平面鏡αυとで安定型共振器
を構成するように発振器筐体（１）に取り付けられた部
分反射鏡、α騰は平面鏡（９）を共振器空間に対して出
し入れする鏡移動機構である。αυ is a plane mirror placed just before the beam extraction mirror (6), α is a partial reflection mirror attached to the oscillator housing (1) so that the concave mirror (4) and the plane mirror αυ constitute a stable resonator. , α rise is a mirror moving mechanism that moves the plane mirror (9) in and out of the resonator space.

上記のように構成されたレーザ装置において、鏡移動機
構α階によって平面鏡αυを共振器空間から出した場合
、凹面−１！（４）と凸面鏡（５）及びビーム取り出し
鏡（６）によって不安定型共振器が構成され、従来装置
の動作説明で記述したように円環状のレーザビームが発
振する。In the laser device configured as described above, when the plane mirror αυ is taken out of the resonator space by the mirror moving mechanism α, the concave surface -1! (4), the convex mirror (5), and the beam extraction mirror (6) constitute an unstable resonator, and an annular laser beam is oscillated as described in the explanation of the operation of the conventional device.

鏡移動機構０４によって平面鏡αυを共振器空間に入れ
た場合、凹面鏡（４）と平面鏡（１１）と部分反射鏡α
りとで安定型共振器が構成される。部分反射鏡（Ｉｚか
ら一部反射したレーザビームは平面鏡αυによって伝搬
方向を変え、放電励起空間（３）のレーザ媒質中を増幅
されながら伝搬し、凹面鏡（４）に入射する。When the plane mirror αυ is placed in the resonator space by the mirror moving mechanism 04, the concave mirror (4), the plane mirror (11), and the partially reflecting mirror α
A stable resonator is constructed by the two. The laser beam partially reflected from the partial reflecting mirror (Iz) changes its propagation direction by the plane mirror αυ, propagates while being amplified in the laser medium of the discharge excitation space (3), and enters the concave mirror (4).

この凹面鏡（４）から反射したレーザビームはレーザ媒
質中を増幅されながら伝搬し、平面ｆａ（Ｉυによって
伝搬方向を変えて部分反射鏡（１３に入射し、この入射
したレーザビームの一部が大気に取り出される。The laser beam reflected from this concave mirror (4) propagates through the laser medium while being amplified, changes its propagation direction by the plane fa (Iυ, and enters the partial reflecting mirror (13), and a part of this incident laser beam is transferred to the atmosphere. It is taken out.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおシ、凹面鏡を共通にした不
安定型共振器と安定型共振器を設け、平面鏡を共振器空
間に対して出し入れするように構成したので、不安定型
共振器によるレーザビームと安定型共振器によるレーザ
ビームとを容易に切換えることができるという効果があ
る。As described above, this invention is configured to include an unstable resonator and a stable resonator that share a concave mirror, and to move the plane mirror in and out of the resonator space. This has the effect that the laser beam generated by the stable resonator can be easily switched.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の一実施例によるレーザ装置を示す断
面図、第２図は従来のレーザ装置を示す断面図である。 図において、（１）は発振器筐体、（２）は電極、（３
）は放電励起空間、（４）は凹面鏡、（５）は凸面鏡、
（６）はビーム取り出し鏡、（７）はビーム取り出し窓
、（１１）は平面鏡、α２は部分反射佛、（１３は鏡移
動機構である。 なお、各図中同一符号は同一または相当部分を示す。 代理人　弁理士　木　村　三　朗 第１図 １１；早ｆｌｂ縫 １３４Ｌ移動べ碕FIG. 1 is a sectional view showing a laser device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional laser device. In the figure, (1) is the oscillator housing, (2) is the electrode, and (3
) is a discharge excitation space, (4) is a concave mirror, (5) is a convex mirror,
(6) is a beam extraction mirror, (7) is a beam extraction window, (11) is a plane mirror, α2 is a partial reflection mirror, and (13 is a mirror moving mechanism. The same reference numerals in each figure indicate the same or corresponding parts. Agent: Sanro Kimura, Patent Attorney Figure 1: 11; Fast flb sewing 134L moving table

Claims (1)

【特許請求の範囲】[Claims] 発振器筐体と、この発振器筺体に対向して収納された電
極と、この対向した電極にはさまれた放電励起空間をは
さんで互いに対向するように固定された凹面鏡および凸
面鏡と、この凸面鏡の直前に配置されたビーム取り出し
鏡と、上記凹面鏡と凸面鏡及びビーム取り出し鏡とから
なる不安定型共振器の光軸上の発振器筺体に取り付けら
れたビーム取り出し窓と、上記放電励起空間とビーム取
り出し鏡との間に設けられた平面鏡と、この平面鏡を共
振器空間に対して出し入れする鏡移動機構と、上記凹面
鏡と平面鏡とで安定型共振器を構成するように発振器筺
体に取り付けられた部分反射鏡とを備えたことを特徴と
するレーザ装置。An oscillator housing, an electrode housed opposite to the oscillator housing, a concave mirror and a convex mirror fixed to face each other across a discharge excitation space sandwiched between the facing electrodes, and the convex mirror. a beam extraction mirror disposed immediately before; a beam extraction window attached to the oscillator housing on the optical axis of the unstable resonator comprising the concave mirror, the convex mirror, and the beam extraction mirror; the discharge excitation space and the beam extraction mirror; a plane mirror provided between the two, a mirror moving mechanism for moving the plane mirror in and out of the resonator space, and a partial reflecting mirror attached to the oscillator housing so that the concave mirror and the plane mirror constitute a stable resonator. A laser device comprising:
JP7850485A 1985-04-15 1985-04-15 Laser device Granted JPS61237486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7850485A JPS61237486A (en) 1985-04-15 1985-04-15 Laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7850485A JPS61237486A (en) 1985-04-15 1985-04-15 Laser device

Publications (2)

Publication Number Publication Date
JPS61237486A true JPS61237486A (en) 1986-10-22
JPH0350426B2 JPH0350426B2 (en) 1991-08-01

Family

ID=13663779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7850485A Granted JPS61237486A (en) 1985-04-15 1985-04-15 Laser device

Country Status (1)

Country Link
JP (1) JPS61237486A (en)

Also Published As

Publication number Publication date
JPH0350426B2 (en) 1991-08-01

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