SU650088A1 - Optical device for discriminating contours of binary images - Google Patents

Description

On the matrix of photodetectors, the addition of two beams on the same elementary areas to a phase difference of exactly 180 ° to completely extinguish the rays.

The purpose of the invention. - improving device performance and reliability.

The goal is achieved by the fact that the device, including its light source, a collimator, an amplitude divider, two multipliers, a deflecting system and a photodetector array, successively installed, introduced six matrices from movable mirrors, three fixed mirrors, and the first matrix from movable mirrors on the information input is optically connected through two fixed mirrors to the first output of the amplitude divider, and on the control one, to its input via the off terminal; the second system with the first output of the second multiplier to four e of the light flux optically coupled through the first multiplier to two light beams and a transparency with the original image with the second output of the amplitude diplate, the second, third and fourth matrix of the movable mirrors are optically connected through their control inputs with corresponding outputs of the second breeder, and on the information inputs optically connected with four matrices of fixed mirrors so that each matrix of fixed mirrors receives a beam of light from the previous matrix of the outside mirrors and transfer it to a subsequent matrix of rootstock ™ s mirrors. The fifth matrix of movable mirrors is connected by its information output through the fifth matrix of fixed mirrors to the photodetector array, and through the control inputs to the fourth matrix of fixed mirrors. The sixth matrix of ipod1ZhNYh mirrors on the elastic inputs is optically connected with the second output of the first multiplier, and on the information inputs through the third fixed mirror - with the second output of the amplitude divider.

FIG. 1 shows a block diagram of the device; in fig. 2 shows an example of the execution of a deflection control cell: P1 of an elementary mirror.

The device contains a source / light, the radiation of which is formed into a light flux of uniform intensity using the collimator 2. An amplitude divider 3 is mounted on the path of this light beam to produce three light beams, two of which are fixed by means of fixed mirrors 4, 5, 6 to matrices 7 and 8 of movable mirrors. Moving mirrors of matrices 7-12 serve to deflect the elementary light fluxes falling on them and to change the angle of deflection under the action of the control light flux. In front of the matrices 7-12 of the movable mirrors, matrices 13- / 7 of the movable mirrors are established. The movable mirrors of the matrices 7-12 repeat the binary partitioning of the floor of the transparency 18, which is installed in the path of the first light flux of the amplitude divider 3, in front of the multiplier / 9. A breeder 20 is coupled with one of the light rays of the breeder 19 to four identical light beams.

The deviating system 21 provides for the transfer of four images from the breeder 20 to the control inputs of the matrices 7, 9, 10, V / s with movable mirrors and a shift of one element, respectively up, down, left, right. Highlight contour reception is provided by a matrix of 22 photocells, which converts optical signals into electrical ones.

The device works as follows.

The source collimated radiation (using an amplitude divider, representing, for example, a set of translucent and reflecting mirrors, is divided into three light beams. The first (small) beam of light falls on a transparency 18 with a moving image, on which graphic information of the binary image is applied in the form of transparent and darkened elementary areas. This takes into account that the transparent elementary parts of the banner correspond to the splitting elements there;

After passing the transparency / 5, the first light beam turns into a set of parallel elementary light beams, corresponding to those places where units are recorded in the original image. In splitter 19, the first luminous flux is softened into two beams, each of which carries information about the original image. The first IUchak enters the control inputs of the matrix 8 from movable mirrors, the second bundle after the breeder 19 is multiplied. resident 20, where four light beams are propagated, which through the deflecting system 21 fall on the control inputs of matrices 7, 9, 10, 11 shifted by

one item is correspondingly down, up,

| left, right, i.e. TLu ,. 9 -, 10 - A

 - L.

Claims (1)

Thus, the information inputs of the mirrors of the matrices 7 and 5 receive the light fluxes that have not passed the transparency 18, and the control inputs of the matrices 7, 9, 10, 11 receive the signals of the indicated image / 8. The matrices 7 and S under the action of the control signals L-1-1 and L separate the rays falling on them from the mirrors 5, 6 into two parts going at different angles. The rays that repeat the image fall from the corresponding mirrors of matrix 7 (from the mirrors, the control inputs of which received a signal from the transparency 18) through the matrix of 13 non-base mirrors on mirror mirrors of matrix 9, and from matrix 8 (repeating image L) to informational inputs of the matrix 12. The rays corresponding to the negation of the image (Ay or A) pass by the mirrors of the matrices 13, 12 and are not used. The image Ai of transiarant 18, which arrives at the mirrors of matrix 9, is again divided into 2 parts. The part that does not coincide with the input signals of the elements of the matrix 9, is reflected, and wanders past the elementary fixed mirrors of the matrix M and is not used. The matched part of the image from the excited elements of the matrix 9 passes through the mirrors of the matrix 14 to the matrix 10, i.e., the image selection A /, occurs. Similarly, the selection of a part of the image takes place with the help of the matrices 10, 15 and after which the image A, is formed. After passing the matrices //, 16, an image of Lu, A L f /, L, L is formed, which is fed to the control inputs of the matrix 12 from the i-moving mirrors. At a time, the mirrors of matrix 12 are fed from matrix 5 by the image of the hollow signal L from the transparency 18. Mirrors of matrix 12 deflect part of the LFD At A L / L of the image coming from matrix 8. The detached part of the image passes by matrix 17 and is not used. Remaining with a part of the image L, it arrives at matrix 17, and then at matrix 22 photo-ariemiks. Thus, the operation of the OIG device, is expressed by the expressions of Lu.Lt,. L L, where B is an intermediate image formed after the matrix of 16 fixed mirrors, C is the output contour image. The resistivity of the device described is determined mainly by the response time of the i-moving mirrors. Moreover, the device operates in two cycles. Matrixes 7, 9, 10, and, 8 are triggered in iRW, and matrix 12 in the second. The time / n of the contour acquisition in the device (7-} 1)) i where tM {i) is the response time of the t-matrix . If accepted, then. The response time of the matrix can be the same as the response time of the optical shutters when using the inverse piezoelectric effect of the piezoceramics or the effect of changing the coefficient of medium breaking through the action of an electrostatic field to deflect the light flux. In both cases, the control inputs of the matrix of the moving mirrors are optoelectronic circuits. In the case of an inverse piezoelectric effect, the cell of control of the deflection of an elementary mirror can be polypropylene, for example, according to the scheme shown in FIG. 2, where 23 is a movable mirror, 24 are crystals of piezoelectric ceramics, 25 is a positive electrode, 26 is a negative electrode, 27 is a resistor and 28 is a photodiode. The crystals of the 24 ceramics are oriented so that when the injection of the electrodes 25, 26 occurs, one of them shrinks and the other expands, and the iodine mirror 23 turns around. The co-direction of the resistor 27 is greater than the resistance of the illuminated photodiode 28 and less than its tempo resistance. In the initial state, when the photodiode 28 is not illuminated, the supply voltage is applied mainly to the photodiode 28, and a low voltage is detected to the crystals 24, determined by the dark current of the photodiode 28 and not enough to trigger the piezocrystals 24. When the photodiode 28 illuminates basically arrives at resistor 27 and piezocrystals 24. One of them shrinks, the other expands, and movable mirror 23 unfolds. Matrices with such cells can be made using the technology of sputtering microelectronic circuits and their p; The bocha frequency is in the megahertz range. For further speed control, matrices can be used that use electro-optical effects of changing the refractive index. Thus, the allocation time of the binary image container pin in the proposed device does not depend on the number of split elements and is equal to two times of deflection of one elementary mirror of the matrix of movable mirrors, which can be equal to the response time — the shutter release time in the lime device. Therefore, such a device, as compared with the known one, in which the contour extraction is conducted in three stages, has a response rate 3 times greater. In this device, there is no addition of two lights that are 180 ° out of phase, which increases the reliability of the contour selection. Claims of the invention: An oitic device for extracting contours of binary images, comprising a matrix of photo-detectors, a deflecting system, a light source and a sequence