JPS59101885A - Laser device - Google Patents

Abstract

PURPOSE:To obtain a laser device of a stabilized output by a method wherein a reference bench to determine the optical axis of a laser device, a laser resonator consisting of a laser tube, a total reflection mirror, and a semi-transmitting mirror which are arranged thereon, and a blower which makes uniform the temperature of each part thereof are provided inside a case. CONSTITUTION:The laser tube 3, the total reflection mirror 2a, and the semi- transmitting mirror 2b are installed on the reference bench 1 by means of supporting plates 4, which are placed in the case 5. Further, the blower 7 is provided in the case 5, the inner temperature of the case 5 is made uniform by this blower 7, thus contriving to reduce the temperature gradient of each part.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a laser device having a reference bench.

Conventional configuration and its problems In order to be stable as a laser device, it is necessary to keep the mirror angle (angle of total reflection mirror, semi-transmission mirror) constant with respect to the optical axis. It is a matter of course that the base for determining is stable. Conventionally, in order to obtain a stable base, a symmetrical pipe base with the optical axis at the center of the base (Figure 1) has the disadvantage of being asymmetrical with respect to the optical axis (the optical axis and the center of the base are different). A reference bench-type laser device as shown in FIG. 2 is often used, which can obtain the same intensity as in a small size. In addition, Figures 1 and 2
In the figure, (B) is a pipe, (B) is a support plate, (C) is a laser tube, (A) is a mirror, and (E) is a reference bench.

However, in such a conventional reference bench type laser device, when each component expands and contracts due to heat generation due to laser oscillation and changes in external ambient temperature, the mirror angle with respect to the optical axis changes. The disadvantage was that it was unstable as a radar device because it had to change the radar output. In other words, the conventional standard bench type 7
- As shown in Figure 3, the laser device includes a laser tube (3), a total reflection mirror (2a), and a semi-transmission mirror (2b) attached to a support plate (4) on a reference bench (1), This is the case (5
) is installed within. Taking as an example a case where the external atmosphere temperature is increased in a state where laser oscillation is stable, when the external atmosphere temperature increases, the internal temperature increases through the case (5). At that time, if all the components expand and contract in parallel in the longitudinal direction, the output fluctuation will be within a range where there is no problem, but in reality, temperature gradients occur in each part, and the optical axis (6 degrees) changes in different directions. The mirror angle will be changed with respect to the optical axis (6).The output fluctuation at this time will be as shown by the solid line (A) in FIG.

OBJECTS OF THE INVENTION The present invention is intended to eliminate the above-mentioned drawbacks of the prior art, and its entire purpose is to obtain a radar device with stable output.

Structure of the Invention In order to achieve the above object, the laser device of the present invention includes, inside a case, a reference bench for determining the optical axis of the laser device, a laser tube, a total reflection mirror, and a half-reflector disposed on the reference bench. This configuration includes a laser resonator made up of a transmitting mirror and a blower that equalizes the temperature of each part of the laser resonator.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a schematic configuration diagram of a laser device according to an embodiment of the present invention, and the same components as those shown in FIG. 3 are given the same reference numerals and their explanations are omitted. Fourth
In the figure, (7) is a blower;
As a result, the internal temperature of the case (5) is made uniform and the temperature gradient in each part is reduced, so the change in the mirror angle is slight, and the change in the angle of the mirror is small, as shown by the solid line (b) in Figure 5. becomes extremely small.

Effects of the Invention As explained above, according to the present invention, it is possible to stabilize the radar output, and a stable radar device can be obtained, and its industrial utility value is extremely large. .

[Brief explanation of the drawing]

Figure 1 (a) is a schematic longitudinal side view of a conventional symmetrical radar device, Figure 1 (b) is a schematic longitudinal sectional front view of the same radar device, and Figure 2 (in) is a schematic longitudinal sectional side view of a conventional symmetrical radar device. FIG. 3 is a schematic overall configuration diagram of a conventional reference bench-type laser device, and FIG. 4 is a schematic longitudinal sectional side view of the radar device, FIG. A schematic overall configuration diagram of the device, and FIG. 5 is an explanatory diagram of the output characteristics of the laser device shown in FIGS. 3 and 4. (1)... Reference bench, (2a)... Total reflection mirror, (
2b)...Semi-transparent mirror, (3)...Laser tube, (4)
...-Support plate, (5)...Case, (7)...Blower agent Yoshihiro Moriki Figure 1 (Wa) Figure 2 Figure 3 Figure 4 Figure 5 Temperature change plate

Claims (1)

[Claims] 1. A reference bench for determining the optical axis of the laser device inside the case, a laser resonator consisting of a laser tube, a total reflection mirror, and a semi-transmission mirror placed on this reference bench, and a laser resonator for this laser resonator. A radar device equipped with a blower that equalizes the temperature of each part.