SU511876A3 - Optical device - Google Patents

Description

(54) OPTICAL DEVICE

one

The invention relates to the optical part of devices for recognizing sign images, a handwritten text or a printed text.

The optical devices known for this purpose do not allow using all the luminous flux coming to the photoelectric converters, and as a result, the discriminating devices are sensitive to uneven distribution of the illumination between the image elements. This is due to the fact that y. photo-lactic: hfe samples of photosensitive photosensitive surfaces are much smaller than the sizes of the cases in which they are mounted. B, (as a result of the development of photoelectric converters in {the matrix - most of the incident light flux comes to the structural elements of the body and a smaller part to the photosensitive surfaces. Hence the low use of the light flux And, consequently, the absolute value of the non-uniformity of the light flux becomes comparable to great

Noah luminous flux incident on the light "sensitive surface" of each of the photoelectric converters. This leads to a decrease in the reliability of discrimination by the electronic circuitry of the device for light levels, .46fo decreases the reliability of the work of the entire discriminator.

The business of the invention is to increase the utilization rate of the luminous flux and increase the reliability of recognition.

The goal is achieved by installing a package of light guides with a collimating lens at the entrance and focusing lenses on the output in the space behind the lens, at the foci of which are photosensitive surfaces of the photoelectric converters forming the matrix.

The drawing shows the proposed optical device.

Claims (1)

Optics optical device (: p (it lens 1, projecting 1S from 1 of the object under examination 2 on ixDDlp le of the teria 3 of the light guides 4 through the opted lens 5. the output ends 6 of the light guides 4 are equipped with focusing lenses 7. Behind the focusing lenses 7 the matrix 8 is installed the photoelectric converters 9, the number and location of which corresponds to the number and the opposite of the light guides 4. The photosensitive surfaces 10 of the photoelectric converters 9 are located in the focus of the lenses 7. To provide a filter light, light Water can be made on colored glass. The optical device works as follows. The image of recognizable object 2, designed by Bom 1, is formed at the input ends of 3 light guides 4. The light beams forming this image come to the ends of the perpendicular lens. In this direction, the light rays travel along the length of the optical fibers 4. As a result, the total internal reflection of light from one fiber to another is impossible and its absorption is minimal. Installed behind the output r jjanoB 6 lenses 7 focus light loyw. having passed each of the light guides 4, to the photosensitive surfaces 10 of the form of “1 all 1 transducers 9. Thus, the bolt is used / used) - a part of the luminous flux and o6ecnetntBa necessary to exceed the magnitude of the luminous flux incident on one photoelectric converter, over the absolute value of the irregularity of the light flux which is also reduced by the use of a collimating lens, / stanzpeine in front of the optical fibers. Optical Device for Systems of Separable Signs of Images to Divide the Luminous Flux from the Identifiable Object and Direction of Its Separated Parts to Corresponding Photoelectric Converters, Including an Objective and Optical Fibers, characterized in that, in order to detect the use of light flow and increase the reliability of recognition, it is equipped with a package of optical fibers, whose entrance ends have a collimating lens installed and at the output of optical fibers focusing lenses, in The ocules, which are located in photosensitivity; 10) of the surface of the photoelectric converters that form the matrix.