JPH0227671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying system using a line light receiving element (hereinafter referred to as a line sensor) and a line light emitting element (hereinafter referred to as an LED array) using a - group compound semiconductor.

Conventionally, for example, when creating microfilm,
This required steps such as taking pictures using optical devices, such as lights, cameras, and film, and developing them, but the present invention uses a system that is completely different from conventional methods to easily create microfilms. To provide a method that makes it possible to record and reproduce data. The explanation will be given below with reference to the drawings. FIG. 1 is a schematic diagram of a copying system according to the present invention, and A is a planar part;
B is the cross section. A photoelectric conversion device is used to illuminate a subject 1 printed on paper or the like with light obtained from a light emitting light source 2 such as a lamp, and convert differences in shading of the subject into electrical signals as differences in light reflectance. Detection is performed by a line sensor 3 consisting of a light receiving element. As shown in FIG. 2, the line sensor 3 has a light receiving element 5 on a - group compound semiconductor substrate 4.
It has a shape that looks like it is arranged in an array,
The output is sequentially switched and detected as an electrical signal. Note that the light-receiving elements are not limited to those in an array shape as shown in the illustrated example, and may be, for example, a mechanism that detects electrical signals by mechanically sequentially moving one light-receiving element. In the line sensor, light receiving elements 5 each having a length of 0.05 mm to 0.1 mm are closely arranged and a terminal portion 6 is taken out from each light receiving element. Now, when the line sensor is stopped at point A on the subject 1, the output from the line sensor is sequentially switched by the control circuit 7, amplified by the amplifier circuit 8, and then connected to the LED array 9. The LED array 9 has a structure similar to that shown in the line sensor of FIG. 2, in which light emitting elements 5 each having a diameter of 5 to 10 microns are closely arranged on a group semiconductor substrate 4, and terminals are taken out from each. It is. Especially as the substrate 4
Types that use GaAsP have the property of absorbing light themselves, and are very good at separating light between each light emitting element. The line sensor 3 and the LED array 9 always operate synchronously by the control circuit 7. When the signals of the light receiving elements at point A are sequentially transferred to the LED array in this way, the line sensor 3 moves slightly to point B and repeats the same operation. At the same time, the LED array 9 also moves minutely on the surface of the film 10 as indicated by the arrow, repeating the photosensitive operation. Through the above operations, the figures or characters on the subject 1 will be transferred onto the surface of the film 10, but the distance between the light receiving elements on the line sensor will be approximately
If the size of the light-emitting element on the LED array is reduced to 100 microns and about 5 to 10 microns, a reduction ratio of about 1/10 to 1/20 can be achieved and it can be made into a microfilm.

Note that, for convenience of explanation, FIG. 1 is drawn with a different reduction ratio from the actual one. In the case of mere reduction of graphic characters,
Place subject 1 under line sensor 3 and film 10.
can be placed under the LED array 9.

Furthermore, when enlarging and transferring graphic characters on a microfilm onto photosensitive paper, by using a line sensor in place of the LED array 9 and an LED array in place of the line sensor 3, the content of the film 10 can be transferred to the position of the subject 1. It can be enlarged and reproduced on photosensitive paper placed on the screen.

Furthermore, a semiconductor light-receiving device based on a - group semiconductor can be made to function as a semiconductor light emitting device by applying a bias voltage in the opposite direction; It is known that by applying a voltage in the opposite direction, it can be made to function as a semiconductor light receiving element. Therefore, in the embodiment shown in FIG. 1, by reversing the bias voltages of the light-receiving element and the light-emitting element, the roles of the light-receiving element and the light-emitting element are reversed, and the reduction system from the microfilm to the photosensitive paper is changed from the microfilm to the photosensitive paper. It can also be used as an enlarged playback system.

Examples of the copying system using the light-receiving element and the light-emitting element according to the present invention have been described below.
When converting to microfilm or enlarging and reproducing, there is no need for conventional operations such as photographing using a lens or enlarging projection using a lens, but simply by bringing the line sensor and the subject into relative contact. Graphics or characters can be reproduced in a reduced or enlarged form.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a copying system according to the present invention;
FIG. 2 is a schematic diagram showing the shapes of the line sensor and LED array. 1... Subject, 2... Light emitting source, 3... Line sensor, 4... Group compound semiconductor substrate, 5...
Light receiving element, 6... terminal section, 7... control circuit, 8...
...Amplification circuit, 9...LED array, 10...film or photosensitive paper.

Claims (1)

[Claims] 1. Light is applied to an object such as a character or a figure, and the difference in reflectance is detected by a first photoelectric conversion device consisting of a plurality of semiconductor light-receiving elements based on - group compound semiconductors, and the detection signal is sent to an amplifier circuit. A copying system in which the subject is transferred onto a film or photosensitive paper by the light emitted from the second photoelectric conversion device, which is guided through the photoelectric conversion device to a second photoelectric conversion device composed of a plurality of semiconductor light emitting elements based on a - group compound semiconductor. The plurality of semiconductor light-receiving elements constituting the first photoelectric conversion device are configured by integrating or expanding and arranging them in the same number as the plurality of semiconductor light-emitting devices constituting the second photoelectric conversion device, A copying system using a light-receiving and light-emitting element, characterized in that the object image detected by the semiconductor light-receiving element is transferred to the semiconductor light-emitting element, and is enlarged or reduced and transferred onto the film or photosensitive paper.