JPS58213486A - Ion laser device - Google Patents

Abstract

PURPOSE:To effectively air-cool a laser tube using a simple constitution by a method wherein cooling oil is filled between an ion laser tube and a cylindrical member, the above is closed up airtightly and radiation fins for cooling are provided on the outer circumference of the cylindrical member. CONSTITUTION:An O-ring is attached to both ends of the sheath of the gas laser tube 1 having a pair of mirrors 2 on both ends, an anode lead 3 and a cathode lead 4. The O-ring 5 is attached to the female screw of a lid 7 and the male screw of the cylindrical member through the intermediary of an adapter 6, the cylindrical member 8 and one end of the laser tube are closed tightly, and after oil 9 has been filled in from the opening located on the other end, the other end is also closed tightly. A plurality of radiation fins 10 are provided on the outer circumference of the cylindrical member 8, and a natural air-cooling or a forced air-cooling is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ion laser which has a large output among gas lasers, and particularly relates to an ion laser device in which the heat generated in the laser thin tube section 25λ is cooled with oil and further cooled by natural air via heat radiation fins.

As a light source for holography and various spectrometers including Raman spectroscopy, an ion laser that produces the highest output in the visible light range is used because the greater the intensity of the incident light, the easier it is to process information.Argon A rare gas ion laser, typically a laser, has a higher ionization energy than a He-Ne gas laser, which operates with a discharge current of several IQmA at most, so it can flow an arc discharge current of several 10A and obtain an output of several W. . Therefore, at this time, the laser tube generates heat ranging from several kilowatts to several tens of kilowatts, and for this reason, the thin tube part of the laser tube is usually cooled by water cooling. The ion laser emits 488. Because the OnM oscillation line is suitable for photosensitive materials, there has been an increasing demand for a low-output ion laser that can be used as easily as a He--Ne gas laser. In this case, cooling the laser thin tube by water cooling is inappropriate because the apparatus becomes large-scale, and air cooling is required. The heat generated in the thin tube part of an air-cooled ion laser reaches the IKW even though the output is small, so this thermal deformation causes the optical resonator axis, which is made up of a pair of mirrors installed at both ends of the laser tube, to If the axis of the laser tube is disturbed, the laser output becomes extremely unstable, so the laser tube is cooled to prevent such thermal deformation. A heat dissipation fin is attached to the outer circumference of the thin tube part of the laser tube, and the heat dissipation fin is further surrounded by a 7-door, and a fan is attached to one opening of the hood to draw air into the hood.

To overcome this pressure, forced air cooling of the cooling fins inside the hood was used.

The purpose of this invention is to develop a new system that has a means for absorbing heat generated by a laser tube into oil injected between the laser tube and a cylindrical member and cooling it by natural air cooling via cooling radiating fins provided on the outer periphery of the cylindrical member. We are currently trying to obtain an ion laser device with a unique cooling structure.

The gas laser tube 1 has a pair of mirrors 2 provided at both ends. Anode lead 3. It consists of a cathode lead 4, and on the other hand, KO rings 5 are attached to both ends of the envelope of the gas laser tube 1, and the female thread of the lid 7 and the male thread of the cylindrical member 8 are connected via a 0-ring 5-piece adapter 6 to seal it. After fixing one side of the gas laser tube 1 and injecting enough oil 9 from the opening of the other side, the O-ring 5. The female thread of the lid 7 and the male thread of the cylindrical member 8 are connected via the adapter 6f, and the oil 9
is sealed between the envelope of the laser tube 1 and the cylindrical member 8. □
By applying a voltage of several hundred volts between the anode 3 and cathode 4 of the gas laser tube 1 and causing a discharge, the number i of the gas laser tube 1 is
The heat generated due to the consumption of oow-IKW is cooled by the oil 9, and is transferred to the cylindrical member 8.
It is possible to obtain an ion laser device having a new cooling structure that is naturally air-cooled by a plurality of radiation fins 10 provided on the outer periphery of the ion laser device. Additionally, it is possible to increase the cooling efficiency by using forced air cooling means using a fan for the radiation fins 10.
Needless to say, it is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the ion laser device of the present invention. 1...Ion laser tube, 2...Mirror constituting a resonator, 3...Anode lead, 4...
...Cathode lead. 5...0 ring, 6...adapter, 7
······lid. 8... Cylindrical member, 9... Oil, 10...
...Radiation fin. O Medicine I Concave

Claims (1)

[Claims] An ion laser device comprising an internal mirror type ion laser tube and a cylindrical member to which the laser tube is attached. The laser tube and the cylindrical member are hermetically fixed through 01J rings at both ends of the outer periphery of the ion laser tube, cooling oil is injected between the laser tube and the cylindrical member, and cooling radiating fins are provided on the outer periphery of the cylindrical member. An ion laser device characterized by nine features.