JPS5912554A - Electric discharge lamp - Google Patents

Abstract

PURPOSE:To increase the intensity of illumination in a given direction by providing a reflecting mirror, which is formed by performing vacuum deposition with metal or the like over a desired area of the upper section of an outer tube after an electric discharge lamp is positioned laterally. CONSTITUTION:An emission tube 3 made of quartz glass or the like is installed inside an outer tube 1 made of hard glass or the like, in such a manner that the tube 3 is supported by a supporting member 4. In addition, after an electric discharge lamp is laterally positioned, aluminum metal or the like is vacuum- deposited over a desired area of the upper inner surface of the outer tube 1 to form a reflecting mirror 2. As a result, the intensity of light in a given direction can be increased by the mirror 2, and the lamp can present a significant effect when utilized as an electric discharge lamp for correcting fish.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp in which a reflection mirror made of metal or the like is vacuum-deposited is provided on the upper part of the outer tube while the discharge lamp is placed horizontally.

Conventionally, discharge lamps for attracting fish are so-called hanging lamps, with the base facing upward. The shape of the arc tube, which is the light source of a discharge lamp, is generally elongated, so when the lamp is hung, the light power on both sides is strong, but the light power in the vertical direction is weak.

When using discharge lamps to attract fish, the lights are hung on the deck of a ship, but it is desirable that the light be strong diagonally downward so that both sides of the ship are illuminated.

As a result of various experiments, the present invention has succeeded in producing a discharge lamp that increases the light power diagonally downward by changing the installation position of the discharge lamp and providing a reflecting mirror on the outer tube.

In other words, with the discharge lamp installed horizontally, a reflective mirror vacuum-deposited with metal or the like is provided in the desired area on the top of the mantle tube, thereby increasing the light power in a certain direction and increasing the fish collection efficiency. The present invention provides a new discharge lamp.

Embodiments of the present invention will be described below with reference to the drawings.

2 is the outer tube of the discharge lamp, 2 is a metal reflective mirror vacuum-deposited on the inner surface of the outer tube, 3 is the arc tube, and 4 is a support for holding the arc tube 3. We conducted an experiment to measure diagonally downward light power using a conventional discharge lamp without a reflective mirror, both when it was suspended and when it was installed horizontally.

The test item was a 2KW discharge lamp, and the illuminance was measured by placing a perpendicular line down from the light source and measuring the illuminance at a distance of 2 meters from the light source at an angle of 45 degrees from the perpendicular line.

The data are shown in Table 1.

Just by installing the discharge lamp on the side, the diagonally downward light output was 960 l on average, making it brighter. In the embodiment of the present invention, the outer tube 1 and the hard glass arc tube 3 are made of quartz glass. In the present invention, a reflective mirror is provided on the outer tube 1 by vacuum evaporation, and the interior of the outer tube 1 is evacuated, metal foil is heated and vapor deposited, and the outer tube 1 is held horizontally and the caustic powder is applied. A solution is introduced, and the vacuum-deposited parts are left in a desired area, while the other parts are removed.

In the present invention, metallic aluminum was used as the vapor-deposited metal, but
Other metals such as metallic chromium, metallic lead, etc. may be used, and it is of course possible to use silver nitrate, which is prepared by adding a reducing agent to an aqueous solution of silver nitrate. The data obtained by measuring a discharge lamp with a reflective mirror on the upper half inside the mantle tube 4 as shown in Figure 2 under the same conditions as those in Table 1 is obtained when a conventional discharge lamp without a reflective mirror is hung and lit. A comparison is shown in Table 2.

Table 2 (Unit: Lux) By holding the discharge lamp horizontally in this way and installing a reflective mirror on the outer tube of the discharge lamp, the light power increases by 3880 lux on average when diagonally below the discharge lamp. It was found that jin showed a remarkable effect of

Furthermore, if the reflecting mirror is installed slightly tilted toward the side of the vessel instead of directly above it as shown in Figure 2, the light power will increase and the effect of attracting fish can be improved.

This discharge lamp is suitable not only as a fishing lamp but also as a discharge lamp when you want to emit strong light in a certain direction.
By changing the location, the location and intensity of irradiation can also be changed. Experiments have shown that the intensity of illumination in a certain direction is significantly increased, so the discharge lamp of the present invention is suitable for use as a fishing lamp.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional discharge lamp, and Figure 2 is a side view of a conventional discharge lamp.
FIG. 3 is a side view of such a discharge lamp with a reflective mirror, and FIG. 3 is a cross-sectional view taken in a right angle direction of the discharge lamp of FIG. l ・・Outer tube 2 ・・Reflection mirror 3 with vacuum-deposited metal ・・Earth tube 4 ・・Support patent applicant Koto Electric Co., Ltd. Drawing! ,3I! l

Claims (1)

[Claims] With the discharge lamp installed horizontally, a reflective mirror vacuum-deposited with metal or the like is provided in a desired area on the upper part of the outer tube of the discharge lamp to intensify the intensity of illumination in a certain direction. discharge lamp.