JPS60136156A - Laser-triggered xenon flash lamp - Google Patents

Abstract

PURPOSE:To make a starting pole needless and stabilize flash light at high brightness by lowerng impedance between the anode and the cathode inside a lamp proper while generating plasma discharge between both poles along the orbit of laser light. CONSTITUTION:When impressing the fixed voltage between the anode 11 and the cathode 12 inside a lamp proper 10 while discharging laser light L of high energy from a laser discharge port 13a, said laser light L instantaneously passes through the lamp proper 10 while reaching again the outer side of the lamp proper 10 from a small hole 11a through the small hole 12a. That is to say, when laser light L passes from the anode 11 to the cathode 12, an inclination is generated in potential distribution in the space between both poles and therewith impedance between both poles lowers to start plasma discharge between both poles while generating flash light L. Thereby, the starting pole between needles while stabilizing flash light at high brightness.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a minute rush lamp used for spectroscopic analysis for the purpose of quantitative or qualitative analysis of light absorption, reflection, fluorescence, etc. Technical background] Conventionally, xenon flash lamps have been widely used as light sources for high-speed photography and phototypesetting.

This is based on the fact that xenon flash lamps easily generate high-intensity flash light. Recently, due to its low heat generation and long life, it has begun to be used as a light source for some spectroscopic analyses.

In spectroscopic analysis, a spectrophotometer is generally used to measure light absorption, reflection, and fluorescence at short wavelengths.

A halogen lamp, a deuterium lamp, or a xenon arc lamp, which have a high degree of W, are usually used as the energy source for such a spectrophotometer. Stability here means wJ1# of the light source image.
This means that l is small.

In other words, it is an essential condition for accurate spectroscopic analysis that the fluctuation of light on the incident slit of the spectrophotometer is small.

[Problems with background technology]

The specific structure of a conventional xenon flash lamp is shown in FIG.

In the figure, reference numeral 1 denotes a tube body made of glass or quartz, and inside this tube body 1, an anode 2 and a cathode 3 are provided in opposing arrangement. A plurality of starting rods 4 are disposed between the tube body 1 and xenon gas of tens to hundreds of Hg is sealed inside the tube body 1.

In the xenon flash lamp configured as above, the anode 2
．． When a high voltage is applied between the cathode 3 and the starting rod 4, the anode 2. An inclination of 68 degrees occurs between cathode 3, and the impedance between them decreases, resulting in anodes 2 and 1!'i
A discharge occurs between Qi 3 and Qi 3. This discharge is similar to lightning, and it becomes a plasma state and reaches the cathode from the anode 2 through the starting rod 4, instantaneously at 600 to 1,00 (l A /c
A current density of rl is reached.

When such a large current flows, it excites the xenon gas within the tube 1 and generates a high-intensity flash light F.

However, this flash light F oscillates in the horizontal direction (perpendicular to the direction of discharge) as shown in Fig. 2 due to slight fluctuations in the plasma state based on the electric field change n1 of the starting rod 4''. Due to the fluctuation of the flash light, the xenon flash lamp, although having the great advantage of high brightness, could not sufficiently contribute as a light source for spectrophotometers and the like.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and is suitable as a light source for spectroscopic analysis because it eliminates the need for a starting rod that causes fluctuations in the flash light in the plasma state, and provides stable flash light with high brightness. The purpose of this invention is to provide a laser-triggered doxenon flash lamp.

[Summary of the invention]

The outline of the present invention for achieving the above object is to include a lamp body in which xenon gas is sealed in a tube and an anode and a cathode are arranged facing each other, and a laser oscillation means for generating a laser beam, The anode.

[Embodiments of the Invention] The following is a characteristic feature of the invention, which is characterized in that a flash light in a plasma state is generated between the cathodes based on the potential gradient between the two electrodes caused by passing a laser beam between the cathodes. An embodiment of the present invention will now be described with reference to FIGS.

In the same figure, reference numeral 1 ( ) is a lamp body made of glass or quartz, and inside this lamp body 10 there are several tens to 11 M
xenon gas of tax Hg is sealed inside the lamp body 1 ().
111 and Fur<12 are provided.

In the center of both the I analysis 11 and the first end pole 12, there are small holes ]1a, ]2a through which the laser beam can pass.J3 is a laser oscillation means for generating the laser beam. So, the laser beam emission port 13a of this laser oscillation means 13 is as follows.
A small hole 1 bored outside the lamp body 10 and in the anode 1
In the laser-triggered doxenon flash lamp having the above configuration, the anode 11.
A predetermined voltage is applied between the Kuma JfIiL 12 and the laser beam is emitted through the laser beam emitting port 13a to the outside of the lamp body 10.

From the small hole 11a to the small hole]2a, that is, from the anode]1 to the cathode 12
When the laser beam passes through the electrode, the electric potential distribution in the space between the two electrodes is tilted, and as a result, the impedance between the two electrodes becomes low, plasma discharge is started between the two electrodes, and flash light F is generated.

Since the laser beam has good linearity, the plasma radiation between the two poles is also linear, so there is no horizontal fluctuation like in conventional xenon flash lamps, resulting in stable flash light F? It goes without saying that the present invention does not add 1SL4 to the embodiments described above, and can be modified within the scope of its gist.

For example, laser emission J);? Gas, liquid, and solid semi-7 as means! To the body! ? It is possible to use a laser device of 1ifi/7j↓.

〔Effect of the invention〕

According to the present invention described in detail below, the impedance between the anode and the cathode in the lamp body is reduced by a laser beam, and a plasma group TJ is generated between the two electrodes along the locus of the laser beam.
, ? Since the starting rod is made of earthenware like the conventional xenon flash lamp, it also has less vibration and provides stable ``fA+1'' and high-intensity flash light. A laser tricard xenon flash lamp suitable as a light source for spectroscopic analysis can be provided.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the state of discharge of a conventional xenon flash lamp, and Figure 2 is an explanatory diagram showing the fluctuation state of flash light during discharge between the anode and cathode.
FIG. 3 is an explanatory diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... tube body, 10... lamp body, 11... anode, 12... cathode, 13... laser oscillation means, F...
・Flash light.

Claims (1)

[Claims] The lamp body includes a lamp body in which xenon gas is inserted into the filling, and an anode and a cathode are arranged facing each other, and a laser oscillation means for generating and generating a laser beam, and the laser beam is emitted between the anode and the cathode. 1. A Rehhe triggered xenon flash lamp characterized in that a flash light in a plasma state is generated between the two poles based on the gradient of the electric potential between the two poles caused by passing the σ).