JPH0389445A - High-output fluorescent lamp - Google Patents

Abstract

PURPOSE:To obtain a high-output fluorescent lamp by providing a light emitting source, a photoelectric converting means, a photoelectron multiplying means, a secondary-electron accelerating means, and a phosphor element face. CONSTITUTION:The light from an LED array 1 is photoelectrically converted by a photoelectric converting face 3. The primary electrons thus obtained reach a secondary electron multiplier section 4 by the potential gradient of the voltage V1 and multiplied. The multiplied electron beam is accelerated by the voltage V3 and collides with a fluorescent face 5 arranged nearly in parallel with a secondary electron multiplier photoelectric tube 2 to illuminate it. The light illuminated on the fluorescent face 5 permeates the bottom of a tube 6 and is discharged to the outside. A light emitting face with high illumination power is obtained from a small light source, and the luminous quantity is not affected by the environmental temperature. No bright line spectrum peculiar to Hg exists, thus a high-quality image is obtained when this fluorescent lamp is used for an exposing light source.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to high power fluorescent lamps.

[Prior Art] Conventionally, fluorescent lamps excite the mercury by passing an electric current through the mercury vapor sealed in the tube, and the ultraviolet rays emitted from the mercury excite the fluorescent light coated on the surface of the tube. The body was excited and the visible light emitted from the phosphor was obtained.

[Problems to be Solved by the Invention] However, since the mercury vapor pressure enclosed in the fluorescent lamp varies depending on the temperature of the fluorescent lamp, the amount of light emitted by the fluorescent lamp varies greatly depending on the temperature.

In addition to the emission color unique to phosphors, the emission line spectrum emitted from mercury was also included.

The present invention has been made in order to solve the above-mentioned problems, and provides a high-output fluorescent lamp in which the amount of light emitted is not affected by temperature and the color of the emitted light is determined only by the spectrum emitted by the coated phosphor. is intended to provide.

[Means for Solving the Problems] In order to achieve this object, the fluorescent lamp of the present invention includes a light emitting source, a photoelectron conversion means for converting light emitted from the light emission source into photoelectrons, and the photoelectron conversion means. a photoelectron multiplier for emitting secondary electrons and multiplying the number of secondary electrons by the electron energy of the photoelectrons converted by the photoelectron; and secondary electrons for accelerating the secondary electrons multiplied by the photoelectron multiplier. It is composed of an accelerating means and a phosphor element surface that emits fluorescent light upon incidence of secondary electrons accelerated by the secondary electron accelerating means.

[Function] According to the present invention having the above configuration, light emitted from the small light source is photoelectrically converted on the photoelectric conversion surface of the secondary electron multiplier phototube. The primary electrons obtained thereby reach a secondary electron multiplier section arranged in a planar manner and are multiplied there. The multiplied secondary electrons reach a fluorescent surface arranged substantially parallel to the secondary electron multiplier phototube and cause it to emit light.

[Example] First, the structure of the fluorescent lamp of the present invention will be explained with reference to FIG.

In the fluorescent lamp of the present invention, an LED array 1, a secondary electron multiplier phototube 2, and a fluorescent surface 5 are enclosed in a tube 6, and the inside thereof is evacuated. The secondary electron multiplier phototube 2 is composed of a photoelectric conversion surface 3 and a secondary electron multiplier 4.

The principle of the fluorescent lamp of the present invention will be explained with reference to FIG.

There is a voltage v between the photoelectric conversion surface 3 and the upper surface of the secondary electron multiplier 4.
1, there is a voltage v between the upper surface and the lower surface of the secondary electron multiplier 4.
2, and a voltage v3 is applied between the lower surface of the secondary electron multiplier 4 and the fluorescent surface 5.

Light emitted from the LED array 1 is photoelectrically converted on the photoelectric conversion surface 3. The primary electrons obtained in this way have a voltage v
Due to the potential gradient of 1, the electrons reach the secondary electron multiplier 4 and are multiplied there. The multiplied electron current is accelerated by the voltage v3 and hits the fluorescent surface 5 arranged substantially parallel to the secondary electron multiplier phototube 2, causing it to emit light. The light emitted from the fluorescent surface 5 passes through the bottom of the tube 6 and is emitted to the outside.

An example of the photoelectric conversion surface 3 will be described with reference to FIG.

On the photoelectric conversion surface 3, a transparent electrode 11 of a glass substrate 10ESi02 is deposited, and on top of that a transparent electrode 11 (sb- to -Na-Cs) is deposited.
) 12 is deposited. Light is glass substrate 1
The photoelectrons incident from the 0 side are output in the direction of the secondary electron multiplier 4 due to the potential gradient of voltage v1.

An embodiment of the secondary electron multiplier 4 will be described with reference to FIG.

It is called microchannel play (MCP) and has a diameter of 10. Thickness 4 with countless micropores (channels) 20
00. It has a plate shape, and a voltage V2 is applied in the thickness direction of the plate. The inner wall of each channel 20 is activated as a secondary electron emitting surface and operates as a continuous dynode.

The principle of operation of electron multiplication in the channel 20 of the MCP will be explained with reference to FIG.

When voltage v2 is applied to the input and output sides of the MCP, a potential gradient is generated in the channel direction. Here, when the incident electrons 21 hit the inner wall on the input side, a plurality of secondary electrons are emitted. Since these secondary electrons are accelerated by the potential gradient, they follow certain parabolic trajectories determined by their initial velocity. It then collides with the opposite wall and emits secondary electrons again. In this way, the electrons advance toward the output side while colliding with the inner wall of the channel 20 many times, resulting in an exponentially multiplied electron stream 22 being extracted.

As a result, this electron flow 22 is accelerated by the potential gradient of voltage v3 and hits the fluorescent surface 5, causing it to emit light.

In this embodiment, an LED is used as a small light source, but any light source that emits ultraviolet light, visible light, or infrared light can be used.

The photoelectric conversion surface 3 can convert (Sb- to -
Many substances other than Na-Cs) can be used.

The secondary electron multiplier 4 is not limited to an MCP, but may be a transmission type 2, for example.
A secondary electron film etc. can also be used.

The fluorescent surface 6 can be a light source of any color by selecting the phosphor used.

[Effects of the Invention] As explained above, according to the fluorescent lamp of the present invention, a high-output light emitting surface can be obtained from a small light source, and the amount of light emitted is not affected by the environmental temperature. Moreover, unlike mercury lamps, there is no emission line spectrum unique to mercury.

Therefore, using this fluorescent lamp as an exposure light source for a copying machine or the like has the advantage that high quality images can be obtained.

[Brief explanation of drawings]

Figures 1 to 5 relate to one embodiment of the present invention;
Figure 2 is a perspective view of a high-output fluorescent lamp according to the present invention, Figure 2 is a side view for explaining its operating principle, Figure 3 is an enlarged view of its photoelectric conversion section, and Figure 4 is a secondary electron amplifier. Perspective view of the double part,
FIG. 5 is a sectional view shown to explain the principle of operation. In the figure, 1 is an LED array, 2 is a secondary electron multiplier phototube, and 3
4 is a photoelectric conversion surface, 4 is a secondary electron multiplier, and 5 is a fluorescent surface.

Claims (1)

[Claims] 1. A light emitting source, a photoelectron conversion means for converting light emitted from the light emission source into photoelectrons, and emitting secondary electrons and increasing the number of secondary electrons by the electron energy of the photoelectrons converted by the photoelectron conversion means. A photoelectron multiplier for multiplying the secondary electrons; a secondary electron accelerating means for accelerating the secondary electrons multiplied by the photoelectron multiplying means; and a secondary electron accelerating means for accelerating the secondary electrons; A high-output fluorescent lamp characterized by comprising a phosphor element surface that emits .