JPH03144591A - Optical scanning device - Google Patents

Abstract

PURPOSE:To eliminate the need to move a light source and to maintain the high position accuracy of the light source by turning on respective light emission parts of the light source arrayed in a matrix in order. CONSTITUTION:Electroluminescence 1 is arranged as a light source and plural light emitting elements 1a are arrayed on its one surface in the matrix. Further, the respective light emitting elements 1a are arranged so that the incidence ports of an optical fiber array 3 consisting of many optical fibers 2 correspond to the light emitting elements 1a one to one. Thus, the respective light emission parts of the light source which are arrayed in the matrix are turned on in order to emit light from the projection ports of the optical fibers in the light emission order of the light emission part, thereby scanning and exposing the photosensitive body. Thus, the light source does not move, so the position accuracy of the light source is held high.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical scanning device, and particularly to an optical scanning device that irradiates light from a light source onto a photoreceptor through an optical fiber array consisting of a large number of optical fibers. The present invention relates to an optical scanning device that forms a desired latent image.

[Conventional technology]

Conventionally, optical scanning devices have been widely used, which scan and expose a photoreceptor by irradiating light from a light source through an optical fiber array consisting of a large number of optical fibers to form a desired latent image. .

In such conventional optical scanning devices, for example, the entrance of an optical fiber array consisting of a large number of optical fibers is disposed near a light source that is rotationally driven by a driving device such as a motor, and the optical fiber array is A photoreceptor, which is rotated at a predetermined speed, is disposed near the exit port of the photoreceptor.

Then, while rotating the light source, light is irradiated from the light source to the entrance of the optical fiber array based on a desired image signal, and this irradiation light passes through the inside of the optical fiber and exits from the exit of the optical fiber. A desired latent image is formed on the photoreceptor by scanning exposure of the light onto the body.

[Problem to be solved by the invention]

However, in the conventional optical fiber array, the light source is rotated in order to irradiate each optical fiber of the optical fiber array, so the movement of the light source reduces the positional accuracy of the light source. Therefore, it is not possible to input light into the optical fiber array with high precision, and furthermore, a drive mechanism for the light source is required.
The problem is that the configuration becomes complicated and the device cannot be miniaturized.

The present invention has been made in view of these points, and an object of the present invention is to provide an optical scanning device that can perform highly accurate light irradiation with a simple configuration and without moving the light source. It is.

[Means to solve the problem]

In order to achieve the above object, an optical scanning device according to the present invention includes an input port of an optical fiber array made up of a large number of optical fibers arranged near a light source, and a photoreceptor arranged near an output port of this optical fiber array. In the optical scanning device, the light source has light emitting parts arranged in a matrix, and the light source has light emitting parts arranged in a matrix. , the inlet of the optical fiber array is arranged at a position corresponding to each light emitting part of the light source, and the outlet of the optical fiber is arranged linearly with the light emitting part of the light emitting part of the light source. That is.

[Effect]

According to the present invention, by sequentially lighting up each light emitting section of a light source arranged in a matrix, light is sequentially irradiated from the output port of each optical fiber in accordance with the light emitting order of the light emitting sections, and the photoreceptor is scanned. exposure is performed,
Therefore, since the light source does not move, the positional accuracy of the light source can be maintained with high precision.Furthermore, since a drive mechanism for the light source is not required, the configuration is simple and the device can be made smaller. It is possible.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

1 to 3 show an optical scanning device according to the present invention, in which an electroluminescent device 1 is provided as a light source, and one surface of the electroluminescent device 1 is provided with a plurality of light emitting elements 1a.

King a... are arranged in a matrix. Also,
In each light emitting element 1a portion of this electroluminescence 1, an entrance of an optical fiber array 3 consisting of a large number of optical fibers 2, 2, .
The optical fibers 2 of the book are arranged so as to correspond to each other, and a cylindrical photosensitive drum 4 as a photosensitive member is arranged near the exit of the optical fiber array 3. The photoreceptor may be of an electrophotographic type on which an electrostatic latent image is formed, or may be one on which an exposed latent image is formed, such as photosensitive microcapsule paper.

The output ports of each of these optical fibers 2 are arranged linearly in accordance with the light emitting order of the light emitting elements 1a of the electroluminescence 1, and in this embodiment, the light emitting elements 1a of the electroluminescence 1 are arranged from the top to the top. Light is emitted sequentially in the lateral direction, and the exit ports of the optical fibers 2 are arranged sequentially for each row of the light emitting elements 1a in the lateral direction. As a result, as shown in FIG. 3, when the light-emitting elements 1a are made to emit light in the horizontal direction from the upper stage, first, the light-emitting elements a to e in the upper stage emit light in sequence, and then the light-emitting elements a to f in the middle stage emit light in sequence. The light emitting element 1a of j emits light, and the light emitting element 1a of -o in the lower row emits light, and the continuous light emission of this light emitting element 1a causes the exit of each optical fiber 2 of the optical fiber array 3 to be emitted. In this case, light is sequentially irradiated from the left end, and linear scanning is performed.

Further, a charging head 5 is disposed on the outer periphery of the upper stage side of the optical fiber array 3 of the photosensitive drum 4, and a charging head 5 is arranged to uniformly charge the photosensitive drum 4 to make the photosensitive drum 4 ready for writing. On the outer periphery of the lower stage of the optical fiber array 3 of the drum 4, there is provided a toner adhering device 6 for adsorbing toner to the electrostatic latent image formed on the photosensitive drum 4 to visualize it, and a toner adhering device 6 that contacts the outer circumferential surface of the photosensitive drum 4. A transfer roller 8 that contacts and transfers the toner to a predetermined paper 7, a peeling guide 9 that peels off the paper 7 after transfer from the photosensitive drum 4, an electricity-dissipating head 10° that removes residual potential on the photosensitive drum 4, and a photosensitive drum 4. Cleaners 11 for removing residual toner thereon are sequentially arranged according to the direction of rotation.

Further, on the upstream side of the photosensitive drum 4 in the conveyance direction of the paper 7, a predetermined paper 7 is placed between the photosensitive drum 4 and the transfer roller 8.
A paper feed roller 1.2.12 is disposed between the photosensitive drum 4 and a pair of heating rollers for fixing the paper 7 after transfer. ↓3 and 13 are arranged.

Next, the operation of this embodiment will be explained.

First, the paper feed roller 12 is driven to convey a predetermined paper 7 between the photosensitive drum 4 and the transfer roller 8, and the charging head 5 makes the photosensitive drum 4 ready for writing.

Then, by selectively lighting up each light emitting element 1-a of the electroluminescence 1 based on a desired image signal, light is emitted onto the surface of the photosensitive drum 4 via each optical fiber 2 of the optical fiber array 3. A desired electrostatic latent image is formed on the photosensitive drum 4 by irradiation and scanning exposure. Next, the toner adhesion device 6 applies toner to the electrostatic latent image formed on the photosensitive drum 4, and the transfer roller 8 transfers the toner to the paper 7 fed by the paper feed roller 12. , the paper 7 after the toner transfer is peeled off from the photosensitive drum 4 by the peeling guide 9. Thereafter, the paper 7 is conveyed between the heating rollers 13, and by passing through the heating rollers 13, the transferred toner image is fixed, and a desired image can be formed on the paper 7. can.

On the other hand, the residual potential on the photosensitive drum 4 is removed by the electricity erasing head 10.
The residual toner on the photosensitive drum 4 is removed by the cleaner 11, and the photosensitive drum 4 is made ready to be charged again.

Therefore, in this embodiment, the scanning exposure of the photosensitive drum 4 can be performed by simply causing each light emitting element 1a to emit light without moving the electroluminescent device 1. Therefore, the positional accuracy of the electroluminescent device 1 can be maintained with high precision. Moreover, since a driving mechanism for electroluminescence 1 is not required, the configuration can be extremely simple, and as a result, manufacturing is easy.
The device can be made smaller.

In the above embodiment, the electroluminescent light-emitting elements are dot sequential scanning in which the electroluminescent light emitting elements are sequentially emitted in the horizontal direction from the upper stage, but line sequential scanning may be used in which the electroluminescent light emitting elements are caused to emit light in each stage from the upper stage. Moreover, although the case has been described in which electroluminescence is used as a light source, any light emitting means such as a gas discharge panel, a liquid crystal panel with a backlight, or an LED may be used instead of electroluminescence.

Furthermore, the present invention is not limited to the above embodiments,
Various changes can be made as necessary.

〔Effect of the invention〕

As described above, the optical scanning device according to the present invention performs linear scanning exposure of the photoreceptor by sequentially lighting up each light emitting part of the light sources arranged in a matrix, so the light source can be moved. There is no need to do so, the positional accuracy of the light source can be maintained with high precision, and highly accurate light irradiation can be performed. Moreover, since a drive mechanism for the light source is not required, the configuration is simplified and the device can be made smaller.

[Brief explanation of the drawing]

11 to 3 show an embodiment of the present invention. FIG. 1 is a configuration diagram, FIG. 2 is a perspective view of the optical fiber array portion, and FIG. 3 is a light emitting operation of the optical fiber array portion. FIG. 1... Electroluminescence, 2... Optical fiber, 3... Optical fiber array, 4... Photosensitive drum,
7...Paper.

Claims (1)

[Claims] An input port of an optical fiber array consisting of a large number of optical fibers is disposed near a light source, and a photoreceptor is disposed near an exit port of this optical fiber array, so that the irradiated light from the light source is directed to the optical fibers. In an optical scanning device that forms a desired latent image by irradiating light onto a photoreceptor through an array, a light source having light emitting parts arranged in a matrix is provided, and the light is emitted at a position corresponding to each light emitting part of the light source. An optical scanning device characterized in that the entrance ports of the fiber array are arranged, and the exit ports of the optical fibers are arranged linearly in the order of light emission of the light emitting parts of the light source.