CN105116666B - Optical logic operation device and method based on double digital micro-mirror device - Google Patents
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Abstract
The invention discloses an optical logic operation device and method based on a double digital micromirror device, belonging to the field of optical logic operation. The optical logic operation device comprises a parallel light source, a beam expanding lens, a first digital micromirror device, a registration lens, a second digital micromirror device, an imaging lens and a CCD image sensor. The optical logic operation method comprises the steps of utilizing parallel light rays to be subjected to spatial modulation through a first digital micro-mirror device and a second digital micro-mirror device, loading first input value information and second input value information, printing the first input value information and the second input value information on a photosensitive surface of a CCD image sensor, and then decoding a CCD image according to CCD image numerical definition modes corresponding to different optical logic operation rules to finish operation. The invention adopts the parallel light rays emitted by the parallel light source as the data carrier of the optical logic operation, and has higher integration level, lower power consumption, higher operation speed and stronger interference resistance.
Description
Technical Field
The invention relates to an optical logic operation device and method based on a double digital micromirror device, belonging to the field of optical logic operation.
Background
With the increase of the manufacturing level of optical devices and the development of spatial light modulation technology, large-data optical logic operation becomes possible. Compared with the traditional electronic logic operation, the optical logic operation has the advantages of strong data processing capability, high operation speed, small transmission signal distortion and low power consumption. At present, optical logic operation mostly adopts a method of combining a wavelength division multiplexing technology and a logic processor, namely, light waves loaded at different wavelengths are synthesized and input to a logic device through the wavelength division multiplexer for operation. The data processing capacity of the method depends on the number of channels of the wavelength division multiplexer, but the optical wave signals among the channels are mutually interfered due to the excessive number of channels. In order to avoid crosstalk of the optical wave signals, the number of channels of the wavelength division multiplexer is not too large, so that the data processing capacity of optical logic operation is limited.
Disclosure of Invention
Aiming at the prior art, the invention provides an optical logic operation device and method based on a double digital micromirror device, which are used for solving the problems in the prior optical logic operation technology and have the characteristics of high speed, high efficiency and high integration level.
The invention is realized by an optical logic operation device based on a double digital micro-mirror device, and the technical proposal is as follows: the device comprises a parallel light source, a beam expanding lens, a first digital micromirror device, a registration lens, a second digital micromirror device, an imaging lens and a CCD image sensor.
The parallel light source emits parallel light rays to be used as a data carrier for optical logic operation; the beam expanding lens expands the parallel light rays emitted by the parallel light source and projects the parallel light rays onto the first digital micromirror device at an inclination angle of 24 degrees; the first digital micromirror device is formed by arranging millions of micromirror elements in a two-dimensional array form, each micromirror element can deflect 12 degrees to the left after receiving an on control signal and vertically reflect light projected to the second digital micromirror device, and can deflect 12 degrees to the right after receiving an off control signal and reflect the light projected to the second digital micromirror device out of the device, so that the first-time spatial modulation of expanded parallel light is realized through the left-right deflection of the two-dimensional array micromirror elements; the registration lens is arranged between the first digital micromirror device and the second digital micromirror device and is used for adjusting and realizing registration of two-dimensional array micromirror elements, namely, the micromirror elements of the two digital micromirror devices realize one-to-one correspondence; the second digital micromirror device has the same structure as the first digital micromirror device, is symmetrically arranged at two sides of the registration lens, receives the parallel light rays subjected to the first time spatial modulation by the first digital micromirror device, performs the second time spatial modulation, receives an on control signal, deflects to the left side by 12 degrees to reflect the light rays projected to the second digital micromirror device to the CCD image sensor, receives an off control signal, deflects to the right side by 12 degrees to reflect the light rays projected to the second digital micromirror device; the imaging lens is arranged between the second digital micromirror device and the CCD image sensor, and transmits the parallel light modulated by the second digital micromirror device to the photosensitive surface of the CCD image sensor, and the positions of the imaging lens, the imaging lens and the CCD image sensor meet the imaging condition of an inclined scene; the CCD image sensor is used for receiving the light modulated by the second digital micromirror device to realize photosensitive imaging.
The invention discloses an optical logic operation method based on a double digital micro-mirror device, which comprises the following steps.
The method comprises the following steps of turning on a parallel light source, and adjusting the positions of a first digital micromirror device and a second digital micromirror device relative to a registration lens by using a phase-shifting moire fringe method to realize registration of two-dimensional array micromirror elements.
Secondly, the micro-mirror elements on the first digital micro-mirror device and the second digital micro-mirror device deflect 12 degrees to the left side of the micro-mirror elements after receiving the on control signal and define the logical value 1, and the micro-mirror elements deflect 12 degrees to the right side of the micro-mirror elements after receiving the off control signal and define the logical value 0, so that the two-dimensional array micro-mirror elements of the first digital micro-mirror device and the second digital micro-mirror device are converted into two-dimensional data matrixes consisting of 1 and 0 elements; the two data matrix elements are grouped in a 2 row by 2 column manner,conversion into a new two-dimensional data matrixD1 andD2; in the case of an optical logic operation,D1 represents a first input value and a second input value,D2 represents a second input value;
in the formula (1), the reaction mixture is,d i,j the element of the two-dimensional data matrix is a sub-data matrix with 2 rows and 2 columns, which represents one data bit in the optical logic operation;i=1、2、…m/2，j=1、2、…n/2；mandnthe number of rows and the number of columns of the two-dimensional array micro-mirror elements participating in the operation are respectively.
In thatDIn 1, define the elements
In thatD2, define the elements
The first input value and the second input value are loaded into the parallel light by controlling the deflection of the micromirror elements on the first digital micromirror device and the second digital micromirror device.
The parallel light expanded by the beam expanding lens is subjected to primary spatial modulation by a first digital micromirror device, then is subjected to secondary spatial modulation by a second digital micromirror device through a registration lens, bears first input value and second input value information and then is irradiated onto a photosensitive surface of the CCD image sensor through an imaging lens; at this time, the two-dimensionally distributed black and white checkered code obtained on the CCD image is the result of the optical logic operation.
Thirdly, decoding the CCD image; the black and white square codes on the CCD image are grouped in 2 rows x 2 columns, and the sub-image of each group represents one data bit of the output value in the optical logic operation.
Different optical logic algorithms correspond to different CCD image numerical definition modes; when AND operation is carried out, defining the lower right corner grid of the sub-image as a data bit 1 of a white grid corresponding to an output value, AND the others are 0; when NAND operation is carried out, defining the lower right corner grid of the sub-image as a data bit 0 of a white grid corresponding to an output value, and the others are 1; when OR operation is carried out, defining the grid at the upper left corner of the subimage as a data bit 0 of a white grid corresponding to an output value, and the other data bits are 1; when NOR operation is carried out, defining the grid at the upper left corner of the sub-image as a data bit 1 of a white grid corresponding to an output value, and the other data bits are 0; when XOR operation is carried out, the grid at the upper left corner or the lower right corner of the sub-image is defined as a data bit 0 corresponding to the output value in a white grid, and the other data bits are 1.
Deflecting all micro-mirror elements of the second digital micro-mirror device to the left side by 12 degrees, controlling the deflection of the micro-mirror elements of the first digital micro-mirror device to load a first input value, and performing INV operation; at this time, the upper right corner and the lower right corner of the sub-image are defined as the data bit 0 of the output value corresponding to the white grid, and the others are defined as 1.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a double digital micromirror device to carry out twice modulation on space light and a logic decoding mode of CCD images, thereby realizing the function of optical logic operation. The optical logic operation device adopts the parallel light rays emitted by the parallel light source as the data carrier of the optical logic operation, and has higher integration level, lower power consumption and higher operation speed compared with the traditional electronic operator taking current as the carrier. The optical logic operation method adopts a mode of decoding black and white squares distributed in two dimensions, so that the phenomenon of light wave signal crosstalk cannot occur, the operation is simple and easy, and all logic operation results except INV can be obtained through one-time optical operation.
Drawings
FIG. 1 is a schematic diagram of an optical logic operation device based on a dual digital micromirror device according to the present invention.
FIG. 2 is a schematic diagram of the alignment of two arrays of micromirror elements of a first digital micromirror device and a second digital micromirror device according to the present invention.
Fig. 3 illustrates a spatial modulation pattern of a first dmd according to the present invention for an input value 11000101.
FIG. 4 illustrates a spatial modulation pattern of a second digital micromirror device according to the present invention corresponding to an input value 10100011.
FIG. 5 is a CCD diagram of output values according to a first embodiment of the present invention.
FIG. 6 is a CCD diagram of output values in the second embodiment of the present invention.
In the figure: the image sensor comprises a 1-parallel light source, a 2-beam expanding lens, a 3-first digital micromirror device, a 4-registration lens, a 5-second digital micromirror device, a 6-imaging lens and a 7-CCD image sensor.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1, the optical logic operation device based on double digital micromirror devices of the present invention includes a parallel light source 1, a beam expanding lens 2, a first digital micromirror device 3, a registration lens 4, a second digital micromirror device 5, an imaging lens 6 and a CCD image sensor 7.
The parallel light source 1 emits parallel light rays to be used as a data carrier for optical logic operation; the beam expanding lens 2 expands the parallel light rays emitted by the parallel light source 1 and projects the parallel light rays onto the first digital micromirror device 3 at an inclination angle of 24 degrees; the first digital micromirror device 3 is formed by arranging millions of micromirror elements in a two-dimensional array form, each micromirror element can deflect 12 degrees to the left after receiving an on control signal and vertically reflect light projected to the micromirror element to the second digital micromirror device 5, and can deflect 12 degrees to the right after receiving an off control signal and reflect the light projected to the micromirror element out of the device, so that the first-time spatial modulation of the expanded parallel light is realized through the left-right deflection of the two-dimensional array micromirror elements; the registration lens 4 is arranged between the first digital micromirror device 3 and the second digital micromirror device 5 and is used for adjusting and realizing registration of two-dimensional array micromirror elements, namely, the micromirror elements of the two digital micromirror devices realize one-to-one correspondence; the second digital micromirror device 5 and the first digital micromirror device 3 have the same structure, are symmetrically arranged at two sides of the registration lens 4, receive the parallel light rays subjected to the first time spatial modulation by the first digital micromirror device 3, and perform the second time spatial modulation on the parallel light rays, the micromirror elements on the second digital micromirror device 5 receive an on control signal, deflect the on control signal by 12 degrees to the left side of the micromirror element and reflect the light rays projected to the CCD image sensor 7, and receive an off control signal, deflect the on control signal by 12 degrees to the right side of the micromirror element and reflect the light rays projected to the CCD image sensor 7; the imaging lens 6 is arranged between the second digital micromirror device 5 and the CCD image sensor 7, and transmits the parallel light modulated by the second digital micromirror device 5 to the photosensitive surface of the CCD image sensor 7, and the positions of the imaging lens 6, the imaging lens and the CCD image sensor meet the imaging condition of an oblique scene; the CCD image sensor 7 is used for receiving the light modulated by the second digital micromirror device 5 to realize photosensitive imaging.
The optical logic operation method is carried out by using the optical logic operation device based on the double digital micromirror device, and the steps are as follows.
Turning on a parallel light source 1, adjusting the positions of a first digital micromirror device 3 and a second digital micromirror device 5 relative to a registration lens 4 by using a phase-shifting moire fringe method, and realizing registration of two-dimensional array micromirror elements, namely realizing a one-to-one correspondence relationship between the micromirror elements of the first digital micromirror device 3 and the second digital micromirror device 5, as shown in fig. 2; according to the projection imaging theorem, the coordinate directions of the two-dimensional array micro-mirror elements are opposite up and down and left and right.
Secondly, the micro-mirror elements on the first digital micro-mirror device 3 and the second digital micro-mirror device 5 are deflected to the left side by 12 degrees to define a logic value 1 after receiving an on control signal, and the micro-mirror elements are deflected to the right side by 12 degrees to define a logic value 0 after receiving an off control signal, so that the two-dimensional array micro-mirror elements of the first digital micro-mirror device 3 and the second digital micro-mirror device 5 are converted into two-dimensional data matrixes consisting of 1 and 0 elements; the two data matrix elements are grouped in a 2-row-2-column mode and converted into a new two-dimensional data matrixD1 andD2; in the case of an optical logic operation,D1 represents a first input value and a second input value,D2 represents a second input value;
in the formula (1), the reaction mixture is,d i,j the element of the two-dimensional data matrix is a sub-data matrix with 2 rows and 2 columns, which represents one data bit in the optical logic operation; i =1, 2, … m/2, j =1, 2, … n/2;mandnthe number of rows and the number of columns of the two-dimensional array micro-mirror elements participating in the operation are respectively.
In thatDIn 1, define the elements
In thatD2, define the elements
The first input value and the second input value are loaded into the parallel light by controlling the deflection of the micromirror elements on the first digital micromirror device 3 and the second digital micromirror device 5.
The parallel light expanded by the beam expanding lens 2 is subjected to primary spatial modulation by a first digital micromirror device 3, then is subjected to secondary spatial modulation by a second digital micromirror device 5 through a registration lens 4, bears first input value and second input value information, and then is irradiated onto a photosensitive surface of a CCD image sensor 7 through an imaging lens 6; at this time, the two-dimensionally distributed black and white checkered code obtained on the CCD image is the result of the optical logic operation.
Thirdly, decoding the CCD image; the black and white square codes on the CCD image are grouped in 2 rows x 2 columns, and the sub-image of each group represents one data bit of the output value in the optical logic operation.
Different optical logic algorithms correspond to different CCD image numerical definition modes; when AND operation is carried out, defining the lower right corner grid of the sub-image as a data bit 1 of a white grid corresponding to an output value, AND the others are 0; when NAND operation is carried out, defining the lower right corner grid of the sub-image as a data bit 0 of a white grid corresponding to an output value, and the others are 1; when OR operation is carried out, defining the grid at the upper left corner of the subimage as a data bit 0 of a white grid corresponding to an output value, and the other data bits are 1; when NOR operation is carried out, defining the grid at the upper left corner of the sub-image as a data bit 1 of a white grid corresponding to an output value, and the other data bits are 0; when XOR operation is carried out, the grid at the upper left corner or the lower right corner of the sub-image is defined as a data bit 0 corresponding to the output value in a white grid, and the other data bits are 1.
Deflecting all the micro-mirror elements of the second digital micro-mirror device 5 to the left side by 12 degrees, controlling the micro-mirror elements of the first digital micro-mirror device 3 to deflect and loading a first input value, and performing INV operation; at this time, the upper right corner and the lower right corner of the sub-image are defined as the data bit 0 of the output value corresponding to the white grid, and the others are defined as 1.
The first embodiment is as follows:
the following describes the present invention in detail by taking the optical logic operation of the 8-bit first input value 11000101 and the 8-bit second input value 10100011 as an example:
the first input value 11000101 is loaded into the 4 row x 8 column array micromirror element of the first digital micromirror device 3, and the resulting data matrix is:
its corresponding first digital micromirror device 3 spatially modulates the pattern as shown in fig. 3.
Loading a second input value (10100011) into the 4 row by 8 column array of micromirror elements of the second digital micromirror device 5 corresponding to the array of micromirror elements of the first digital micromirror device 3 to obtain a data matrix:
its corresponding second digital micromirror device 5 spatially modulates the pattern as shown in fig. 4.
The parallel light is twice spatially modulated by the first digital micromirror device 3 and the second digital micromirror device 5, and strikes the photosensitive surface of the CCD image sensor 7 to obtain a CCD image, as shown in fig. 5.
According to the CCD image numeralization definition modes corresponding to different optical logic algorithms, when AND operation is carried out, the lower right corner grid of the sub-image is a data bit 1 of a white grid corresponding to an output value, the other data bits are 0, AND the result is 10000001; when NAND operation is carried out, the lower right corner grid of the sub-image is a data bit 0 with a white grid corresponding to an output value, and the other grids are 1, so that the result is 01111110; when the OR operation is carried out, the grid at the upper left corner of the sub-image is a white grid corresponding to the data bit 0 of the output value, the other grids are 1, and the result is 11100111; when NOR operation is carried out, the grid at the upper left corner of the sub-image is a data bit 1 with a white grid corresponding to an output value, and the other grids are 0, and the result is 00011000; when XOR operation is carried out, the grid at the upper left corner or the lower right corner of the sub-image is a data bit 0 corresponding to the output value in a white grid, and the other grid is 1, so that the result is 01100110.
Example two:
the present invention is further illustrated below by taking the INV operation of the 8-bit input value 11000101 as an example:
deflecting all the micro-mirror elements of the second digital micro-mirror device 5 to the left side thereof by 12 degrees, controlling the deflection of the micro-mirror elements of the first digital micro-mirror device 3 to load input values; the parallel light is once spatially modulated by the first digital micromirror device 3 and strikes the photosensitive surface of the CCD image sensor 7 to obtain a CCD image, as shown in fig. 6.
When the INV operation is performed, the upper right square grid and the lower right square grid of the sub-image are both data bit 0 of the corresponding output value of the white grid, and the others are 1, and the result is 00111010.
In the present invention, the oblique field imaging condition and the phase-shifting moire fringe method are all common knowledge in the art, and can be reproduced by those skilled in the art according to the requirements, and are not described herein again.
While the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than restrictive, and many modifications may be made by those skilled in the art without departing from the spirit of the present invention within the scope of the appended claims.
Claims (1)
1. An optical logic operation method based on double digital micromirror devices is provided, wherein the adopted optical logic operation device based on the double digital micromirror devices comprises a parallel light source (1), a beam expanding lens (2), a first digital micromirror device (3), a registration lens (4), a second digital micromirror device (5), an imaging lens (6) and a CCD image sensor (7); the parallel light source (1) emits parallel light rays to be used as a data carrier for optical logic operation; the beam expanding lens (2) expands the parallel light rays emitted by the parallel light source (1) and projects the expanded parallel light rays onto the first digital micromirror device (3) at an inclination angle of 24 degrees; the first digital micro-mirror device (3) is formed by arranging millions of micro-mirror elements in a two-dimensional array form, each micro-mirror element can deflect 12 degrees to the left after receiving an on control signal, the light projected to the micro-mirror element can be vertically reflected to the second digital micro-mirror device (5), the light projected to the micro-mirror element can deflect 12 degrees to the right after receiving an off control signal, and the light is reflected out of the device, so that the first-time spatial modulation of the expanded parallel light is realized through the left and right deflection of the two-dimensional array micro-mirror elements; the registration lens (4) is arranged between the first digital micromirror device (3) and the second digital micromirror device (5) and is used for adjusting and realizing registration of two-dimensional array micromirror elements, namely, the micromirror elements of the two digital micromirror devices realize one-to-one correspondence; the second digital micromirror device (5) and the first digital micromirror device (3) have the same structure, are symmetrically arranged at two sides of the registration lens (4), receive parallel light rays subjected to primary spatial modulation by the first digital micromirror device (3), and perform secondary spatial modulation on the parallel light rays, and a micromirror element on the second digital micromirror device (5) receives an on control signal, deflects 12 degrees to the left side of the micromirror element and reflects the light rays projected to the micromirror element to the CCD image sensor (7), receives an off control signal, deflects 12 degrees to the right side of the micromirror element and reflects the light rays projected to the CCD image sensor out of the device; the imaging lens (6) is arranged between the second digital micromirror device (5) and the CCD image sensor (7), and transmits the parallel light modulated by the second digital micromirror device (5) to the photosensitive surface of the CCD image sensor (7), and the positions of the imaging lens, the imaging lens and the CCD image sensor meet the imaging condition of an inclined scene; the CCD image sensor (7) is used for receiving light modulated by the second digital micro-mirror device (5) to realize photosensitive imaging, and is characterized by comprising the following steps:
turning on a parallel light source (1), and adjusting the positions of a first digital micromirror device (3) and a second digital micromirror device (5) relative to a registration lens (4) by using a phase-shifting moire fringe method to realize registration of two-dimensional array micromirror elements;
secondly, the micro-mirror elements on the first digital micro-mirror device (3) and the second digital micro-mirror device (5) are deflected to the left side by 12 degrees to define a logic value 1 when receiving an on control signal, and the micro-mirror elements are deflected to the right side by 12 degrees to define a logic value 0 when receiving an off control signal, so that the two-dimensional array micro-mirror elements of the first digital micro-mirror device (3) and the second digital micro-mirror device (5) are converted into two-dimensional data matrixes consisting of 1 and 0 elements; grouping the two data matrix elements in a 2-row-2-column mode, and converting the two data matrix elements into new two-dimensional data matrixes D1 and D2; in the optical logic operation, D1 represents a first input value, and D2 represents a second input value;
in the formula (1), di,jThe element of the two-dimensional data matrix is a sub-data matrix with 2 rows and 2 columns, which represents one data bit in the optical logic operation; 1, 2, … m/2, 1, 2, … n/2; m and n are respectively the row number and the column number of the two-dimensional array micro-mirror elements participating in the operation;
in D1, an element is defined
In D2, an element is defined
Loading a first input value and a second input value into parallel light by controlling the deflection of micromirror elements on a first digital micromirror device (3) and a second digital micromirror device (5);
parallel light expanded by the beam expanding lens (2) is subjected to primary spatial modulation by a first digital micromirror device (3), then is subjected to secondary spatial modulation by a second digital micromirror device (5) through a registration lens (4), bears first input value and second input value information, and then is irradiated onto a photosensitive surface of a CCD image sensor (7) through an imaging lens (6); at the moment, the two-dimensionally distributed black and white square codes obtained on the CCD image are the result of optical logic operation;
thirdly, decoding the CCD image; grouping black and white square codes on the CCD image in 2 rows multiplied by 2 columns, wherein the subimage of each group represents one data bit of an output value in optical logic operation;
different optical logic algorithms correspond to different CCD image numerical definition modes; when AND operation is carried out, defining the lower right corner grid of the sub-image as a data bit 1 of a white grid corresponding to an output value, AND the others are 0; when NAND operation is carried out, defining the lower right corner grid of the sub-image as a data bit 0 of a white grid corresponding to an output value, and the others are 1; when OR operation is carried out, defining the grid at the upper left corner of the subimage as a data bit 0 of a white grid corresponding to an output value, and the other data bits are 1; when NOR operation is carried out, defining the grid at the upper left corner of the sub-image as a data bit 1 of a white grid corresponding to an output value, and the other data bits are 0; when XOR operation is carried out, the grid at the upper left corner or the lower right corner of the sub-image is defined as a data bit 0 of a white grid corresponding to an output value, and the other data bits are 1;
deflecting all micro-mirror elements of the second digital micro-mirror device (5) to the left side by 12 degrees, controlling the deflection of the micro-mirror elements of the first digital micro-mirror device (3) to load a first input value, and performing INV operation; at this time, the upper right corner and the lower right corner of the sub-image are defined as the data bit 0 of the output value corresponding to the white grid, and the others are defined as 1.
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