RU57034U1 - FIBER OPTICAL ELECTRONIC DEVICE FOR ANALYSIS OF CONTROL SCALES AND DRIVING REGISTERS OF IMPRESSIONS AND PHOTOFORMS - Google Patents

Abstract

The device relates to means of quality control of printing prints and photo forms. This device provides quality control in the printing industry.

The technical result of the claimed solution is:

Expanding the capabilities of image analysis, namely obtaining a high-quality image during the measurement by replacing an elementary photocell with a multi-segment CCD matrix, which allows us to analyze register marks, control scales and myrrh. The possibility of using a computer to study the obtained measurement results, photographs of the investigated area of the print. Reducing the dimensions of the measuring head due to the location of the elements in close proximity, through the use of a matte light rim as a illuminator. The appearance of the possibility of installing optical fiber with a measuring head anywhere in the technological process and the production area due to the modernization of the measuring head with a light source of optics rejection.

The problem to be achieved is achieved by the fact that the fiber-optic electronic device for analyzing control scales and registration registers of prints and photoforms consists of a illuminator, an original, a light guide, light filters, a photodetector, an indicator, the illuminator is made in the form of a matte light rim and autonomous LEDs installed at the input of the light guide consisting of a bundle of optical fibers, the output of which is connected to a photodetector made in the form of a CCD array with spectrozonal ones installed on it, the number of which is equal to t he pixels on the CCD matrix and indicator configured as a full-color liquid crystal display, further connected to a computer. 1 n P. f-ly., 1 ill.

Description

The device relates to means of quality control of printing prints and photo forms. This device provides quality control in the printing industry.

Closest to a universal optical-electronic device is a densitometer for working with reflected light. Published: “Prepress Equipment” Yu.N. Samarin, N. P. Saposhnikov, M. A. Sinyak, Moscow Publishing House MGUP 2000 p. 169-171

A densitometer consists of: a illuminator, an original under investigation, a diaphragm, a light guide, a photodetector (silicon semiconductor element), and an indicator. Measurements are made next. way: the light from the illuminator falls on the original under study, then it is reflected, it passes through the light filters, which select the spectrum controlled on the print, and then is recorded by an elementary photodetector and the obtained values are displayed on a digital segment screen.

In a densitometer for working with reflected light, the disadvantages are:

there is no way to determine the quality of the resulting image (we are talking about a control scale), during the measurement process we get only a modulated optical pulse, which is converted by the logical unit into the optical density value. It does not allow to analyze the received signal digitally. It has large dimensions of the measuring head (as it has an optics light source installed and all this is at a distance from each other)

The technical result of the claimed solution is:

Expanding the capabilities of image analysis, namely obtaining a high-quality image during the measurement by replacing an elementary photocell with a multi-segment CCD matrix, which allows us to analyze register marks, control scales and myrrh. The possibility of using a computer to study the obtained measurement results, photographs of the investigated area of the print.

Reducing the dimensions of the measuring head due to the location of the elements in close proximity, through the use of a matte light rim as a illuminator. The appearance of the possibility of installing optical fiber with a measuring head anywhere in the technological process and the production area due to the modernization of the measuring head with a light source of optics rejection.

The problem to be achieved is achieved by the fact that the fiber-optic electronic device for analyzing control scales and registration registers of prints and photoforms consists of a illuminator, an original, a light guide, light filters, a photodetector, an indicator, the illuminator is made in the form of a matte light rim and autonomous LEDs installed at the input of the light guide consisting of a bundle of optical fibers, the output of which is connected to a photodetector made in the form of a CCD array with spectrozonal ones installed on it, the number of which is equal to t he pixels on the CCD matrix and indicator configured as a full-color liquid crystal display, further connected to a computer.

Figure 1 shows the device where:

1. Matte light rim (for uniform illumination of the original).

2. Original

3. The substrate

4. Illuminators (LEDs).

5. The protective coating of the optical fiber.

6. Optical fiber (optical fiber).

7. Spectrozonal filters.

8. The CCD.

9. The computer.

10. The liquid crystal screen.

The device operates as follows:

The LEDs 4 illuminate the matte light rim 1, as a result, a uniform luminous flux that passes through the paint layer and is reflected on the monitored portion of the original 2. Next, the light flux passes through the fiber 6 and through the spectral filters 7 is projected onto the CCD matrix 8, the elements of which react to light and create

electric charge, the magnitude of which is proportional to the amount of light received. Then, the CCD matrix converts the photons incident on it into electrons, but it works with analog data, so the next step is to remove the stored electrical signals from the pixels and then convert them to electric current using the built-in output amplifier. The current is sent to an external or built-in analog-to-digital converter (ADC), after which the digital full-color image is stored in the ROM of the computer 9. The resulting image of the computer is analyzed using special algorithms and displays data on the measurement results (which can be used to correct the playback process.) And directly 10 image on full color LCD screen.

In the process of measurement, we get not only a modulated electrical impulse, but a clear image with which we can conduct a deep analysis, both analog (by means of the human eye observing it on the LCD display) and digital (by means of a computer). A specific analysis can be carried out using specially designed scales for quality control, which can be printed on originals, as well as specialized computer algorithms developed for these scales. A computer may have feedback from a print (or photo output device). After the computer has analyzed the data, it can generate a correction signal and create a control effect on the playback device. Optical fiber is characterized in that it can be installed anywhere in the process and production site. In the proposed device, the focusing problem is solved, it is enough to attach the cross section of the fiber optic beam to the analyzed image. In other cases, this requires rather complex and specialized conditions. The light source is located in the measuring head and illuminates the matte rim directly on the cross section of the beam of optical fibers, which can significantly reduce its dimensions.

Claims (1)

Fiber-optic electronic device for the analysis of control scales and register registers of prints and photoforms, consisting of a illuminator, an original, a light guide, light filters, a photodetector, indicator, characterized in that the illuminator is made in the form of a matte light rim and autonomous LEDs installed at the input of the light guide, consisting of a bundle of optical fibers, the output of which is connected to a photodetector made in the form of a CCD array with spectrozonal ones installed on it, the number of which is equal to the number of pixels oil on the CCD matrix, and an indicator made in the form of a full-color liquid crystal screen, additionally associated with a computer.