KR101880520B1 - Apparatus for generating random number based on quantum shot noise of multiple light sources - Google Patents

Abstract

The present invention discloses a random number generating apparatus capable of uniformizing the spatial light intensity distribution of an optical signal radiated from a light source and input to each pixel.
That is, the random number generation apparatus of the present invention comprises at least two light sources, a photodetector including a plurality of photodetection pixels for detecting optical signals emitted from at least two light sources, and a photodetector for detecting quantum noise Wherein at least two light sources are respectively input to the respective pixels of the plurality of light receiving pixels when the combined optical signals radiated from the at least two light sources are input to the plurality of light receiving pixels And is arranged symmetrically with respect to the optical detecting portion so that the time-average light intensity values of the optical signal become uniform.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a quantum noise-based random number generation apparatus using a plurality of light sources,

The present invention relates to a random number generation apparatus having a function of uniformly controlling a spatial light intensity distribution of an optical signal using a plurality of light sources, and more particularly, to a random number generation apparatus having a spatial light intensity The present invention relates to a random number generating apparatus capable of uniformly distributing a spatial intensity distribution.

Random numbers are needed for various fields such as security, scientific calculation, game, lottery, etc. In most cases, pseudo-random numbers (pseudorandom numbers) are generated based on algorithms rather than pure random numbers ) Are used.

However, since the pseudo-random number has a specific pattern, if the bit string generated for a long time is observed, the pattern of the generated bit string is likely to be derived, so that unpredictability, which is one of fundamental characteristics of the random number, is greatly damaged. In particular, if such pseudo-random numbers are used in security fields including cryptographic communication, security problems become very serious problems.

In order to solve the above problems, various researches and developments have been made on a true random number generator that generates a pure random number, not a pseudo random number. Of these, a quantum random number generator A quantum random number generator is a technique for generating a random bit string using a perfect random number existing in a natural phenomenon.

One method of constructing such a quantum random number generator is to use shot noise, which is the uncertainty of the number of photons, which is represented by the particle characteristics of the light that the light source has.

In implementing a random number generation device that generates random numbers based on shot noise or quantum shot noise of the photon number, which is one of the most fundamental noise of the light source, a CMOS sensor ) Or a CCD sensor (see, for example, Physical Review X, 4, 031056 (2014)).

However, in a general case, the time-average value of the light intensity of the optical signal input to each pixel of the image sensor in the camera module is not uniform. This complicates the algorithm of the post-processing step of interpreting the output value of each pixel, which makes it difficult to implement the random number generating device.

More specifically, a random noise generator based on shot noise or quantum shot noise uses a light intensity value accumulated for a specific time in each pixel as a random number, randomness. In particular, since the light intensity values accumulated for a specific time in each pixel follow the Poisson distribution, the mean value and the variance value of such light intensity values have a linear proportionality. For this reason, the variance, a measure of fluctuation, is determined by the mean value, and the randomness at each pixel is eventually influenced by the mean value of the light intensity values, do. Therefore, it is important to make the light intensity time-average value input to each pixel uniform so that each pixel of the image sensor has the same randomness.

For reference, when measuring the size of an optical signal input to an image sensor using an image sensor, each pixel outputs a signal corresponding to an accumulated number of photons input to a pixel for a predetermined time. Here, the time-averaged light intensity value means an average value of the output signals obtained by repeating the action of measuring the size of the optical signal for a predetermined time sufficiently many times for different times.

That is, when an image sensor including a plurality of pixels is used, the distribution of time-averaged values of light intensity input to each pixel corresponds to the spatial light intensity distribution of the light source, It is preferable that the time average values of the light intensities input to the respective pixels are uniform.

Accordingly, the present invention proposes a method for uniformizing the spatial light intensity distribution incident on the image sensor using a plurality of light sources. More specifically, a method for uniformizing the time-averaged value of the light intensity input to each pixel of the image sensor by appropriately symmetrically arranging a plurality of light sources is proposed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method and apparatus for generating a random number that can uniformize a time-average value of light intensity input to each pixel of an image sensor using a plurality of light sources Generating device.

According to an aspect of the present invention, there is provided a random number generator comprising: at least two light sources; A photodetector including a plurality of light receiving pixels for detecting an optical signal emitted from the at least two light sources; And a random number generator for generating a random number using quantum noise of the amount of light detected by the plurality of light receiving pixels, wherein the at least two light sources are respectively emitted from the at least two light sources, The light-receiving unit is symmetrically disposed with respect to the optical detecting unit so that the time-average light intensity values of the optical signals input to the respective pixels of the plurality of light-receiving pixels become uniform.

Preferably, the at least two light sources are arranged to be symmetrical with respect to the optical detection unit at a minimum distance at which a time-average light intensity value of the optical signal becomes uniform.

Preferably, when the at least two light sources are located on the same substrate as the light detecting unit, the at least two light sources are arranged at the same distance from the light detecting unit.

Preferably, adjusting the placement of the at least two light sources such that a time-average light intensity value of the optical signal is uniform, and controlling the amount of current of at least one of the at least two light sources .

Preferably, the time-averaged light intensity values of the optical signals respectively emitted by the at least two light sources each follow at least one distribution characteristic that the light source can have, And the spacing between the light sources symmetrical to each other is determined based on the at least one distribution characteristic.

Preferably, when the distribution characteristics are Gaussian distributions, the spacing between the light sources symmetrical to each other is two times the standard deviation of the Gaussian distribution.

Preferably, the light source further comprises a cover surface reflecting the optical signal emitted from the at least two light sources.

According to the random number generation apparatus having the function of uniformly controlling the spatial light intensity distribution of an optical signal using a plurality of light sources according to the present invention, the time-averaged value of the light intensity input to each pixel of the image sensor is Thereby obtaining an effect that can be uniform.

1 is a diagram for explaining the basic construction principle of a random number generation apparatus.
2 is a diagram showing an implementation scheme that can be basically considered when a random number generator is manufactured in a chip form.
FIG. 3 is a diagram showing another implementation method that can be considered when a random number generation apparatus is manufactured in a chip form.
4 is a diagram showing an example of detecting the amount of light in the random-number generating device.
5 is a circuit diagram showing an implementation method of a plurality of light sources.
6 is a configuration diagram showing a configuration of a random number generator according to an embodiment of the present invention.
7 is a diagram showing an example of a layout structure of a random number generator according to an embodiment of the present invention and an example of a time-averaged light intensity distribution of an optical signal uniformly input to each light receiving pixel of an image sensor.
FIG. 8 is a flowchart illustrating the generation of random numbers using a time-averaged light intensity value of an optical signal uniformly input to each light receiving pixel in the random number generator according to the embodiment of the present invention.
9 and 10 are views showing another example of the arrangement structure of the random number generation device according to the embodiment of the present invention and the other example of the time-average light intensity distribution of the optical signal uniformly inputted to each light receiving pixel of the image sensor Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention relates to a random number generator (hereinafter, a quantum random number generator) capable of uniformizing the spatial intensity distribution of an optical signal radiated from a light source and input to each pixel.

The quantum random number generation apparatus uniformly detects the light intensity value, i.e., the light intensity value for a predetermined time of the optical signal radiated from the light source and input to each pixel, and measures shot noise or quantum shot noise with respect to the detected light amount And generates a true random number (hereinafter, a random number).

The quantum random number generation apparatus may be a Quantum Random Number Generator (QRNG), and may be implemented in the form of an apparatus, a module, and a chip.

The present invention relates to a hardware configuration for improving the performance of a quantum random number generator, and more particularly, to a hardware configuration for improving the performance of a quantum random number generator, And to a quantum random number generator capable of optimizing the placement between a light source and a configuration (e.g., an image sensor) that detects an optical signal so that it can be input.

In other words, the present invention relates to a hardware configuration for miniaturization and mass production in the form of a chip when a quantum random number generation apparatus is manufactured, and more particularly, to a method for arranging a light source in a chip.

Before describing the present invention in detail, a basic scheme that can be most easily considered in manufacturing a random number generation apparatus will be briefly described with reference to FIG. 1 to FIG.

First, the basic construction principle of the random number generation apparatus will be described with reference to FIG.

1, the random number generation apparatus detects an optical signal emitted from a light source 10 through a detection unit 20 and detects shot noise or quantum shot noise with respect to the number of photons of the detected light amount, The random number 30 is generated. Similar techniques related to FIG. 1 can be found in Physical Review X, 4, 031056 (2014).

The light source 10 emits a photon, and can successively emit an optical signal composed of a plurality of photons, for example.

The light source 10 may be a coherent light such as a laser or a chaotic light such as a light emitting diode (LED). If an LED is used as the light source 10, it is desirable to apply an appropriate current within a set critical range so that the quantum noise characteristic can be maintained.

The detection unit 20 may be a camera module equipped with an image sensor 21 and generates a random number 30 using quantum noise of a detected amount of light.

At this time, the image sensor 21 includes a complementary metal-oxide semiconductor (CMOS) sensor and a charge coupled device (CCD) sensor, and may be configured as other similar sensors as long as it can detect an optical signal emitted from a light source .

The detection unit 20 amplifies the current / voltage accumulated in the image sensor 21 by a predetermined time unit through the amplifier 22 and then outputs the digital output through the analog-digital converter (ADC) (30).

When the random number 30 is generated according to the basic construction principle of the random number generation device, since the light intensity values accumulated for a specific time in each pixel of the image sensor 21 follow the Poisson distribution, The mean value of the values and the variance value are linearly proportional. For this reason, the variance, a measure of fluctuation, is determined by the mean value, and the randomness at each pixel is eventually influenced by the mean value of the light intensity values, do. Therefore, in order to make each pixel of the image sensor 21 have the same randomness, it is important to make the light intensity time-average value input to each pixel uniform.

That is, since the output value of each pixel of the image sensor 21 corresponds to the light intensity input to each pixel, if the statistical characteristic of the output value becomes different for each pixel, an algorithm of post-processing step Not only is it complicated, but the same random number value can be generated intensively in certain pixels compared to other pixels, so that it is difficult for all pixels to maintain good randomness.

In order to reduce the implementation complexity of the random number generation device and generate a random number sequence of high quality from each pixel, a time-average light intensity value of the optical signal radiated from the light source and input to each pixel It is very important to uniformly affect the overall performance of the random number generator.

However, even though it is very important that the time-average light intensity values of the optical signals input to the respective pixels of the image sensor are uniformly input, the constraint of the hardware implementation size of the randomly- (PCBs) are mainly proposed for simplifying the structure of the PCBs.

Hereinafter, methods to be considered when a random number generating device is manufactured in a chip form according to the basic construction principle of the random number generating device will be described.

As a first implementation method that can be basically considered when a random number generation device is manufactured in the form of a chip, it can be considered that the light source 10 and the image sensor 21 are opposed to each other.

In order to generate the random number generating device according to the first implementation method, the optical signal radiated from the light source 10 should be dispersed as widely as possible, so that a maximum number of pixels in the image sensor 21 can detect a similar number of light amounts. The distance between the light source 10 and the image sensor 21 is limited or the size of the image sensor 21 is limited.

In addition, since an upper substrate 40 for disposing the light source 10 and a lower PCB 50 for disposing the image sensor 21 are separately used, the manufacturing process is complicated So that it is difficult to expect cost reduction and downsizing.

That is, it can be seen that it is difficult to simplify the circuit configuration of the random number generator according to the first implementation scheme.

Meanwhile, as a second implementation method that can be conceived for producing a random number generation device in a chip form according to the basic construction principle of the above-described random number generation device, a light source 10 is provided on one substrate 60 as shown in FIG. It is possible to consider a configuration in which the image sensor 21 is disposed, but a separate light wave guide 70 is added. A similar technique related to FIG. 3 has been introduced at the QCrypt 2014 conference by the author of Physical Review X, 4, 031056 (2014).

However, the layout scheme of separately adding the optical waveguide 70 as in the second implementation scheme not only increases the complexity and cost due to the manufacturing process, but also increases the cost of the optical waveguide 70, which is emitted from the light source 10, It is expected that there will still be a limit in which the time-averaged light intensity value of the signal can not be made uniform.

Accordingly, in the present invention, it is possible to miniaturize and mass-produce the quantum random number generating device in the form of a chip, and to obtain a time-average light intensity value of an optical signal radiated from a light source and input to each pixel of the image sensor We propose a uniform hardware structure, especially a placement of light sources in a chip.

4 to 6, in the quantum random number generating apparatus according to the embodiment of the present invention, a time-average light intensity value of an optical signal radiated from a light source and input to each pixel is made uniform I will first explain the basic principles in detail. At this time, it is assumed that the light source is an LED for convenience of explanation.

In FIG. 4, a quantum random number generation apparatus is implemented using one light source 10.

When the quantum random number generation device is implemented by a single light source 10, when a light signal is emitted from the light source 10, a time-average light intensity value input to each pixel of the image sensor 21 Is determined by the spatial light intensity distribution of the optical signal emitted from the light source. At this time, the spatial distribution of the time-averaged light intensity values input to the respective pixels arranged at different positions spatially varies depending on the optical device processing method. The sum of the Gaussian distributions and the sum of the cosine powers It is also expressed. Techniques related to this can be found in February 2008 / Vol.16, No.3 / OPTICS EXPRESS 1808. However, in many cases, the present invention describes a Gaussian distribution as it follows a Gaussian distribution with one peak.

At least one pixel pi1 in the image sensor 21 positioned corresponding to the central axis 80 of the Gaussian distribution has a maximum intensity of light on average on the basis of the Gaussian distribution at the central axis 80, The largest value among the time-average values is input. However, the remaining pixels pi2 except for the pixel pi1 receive a gradually decreasing amount of light corresponding to a Gaussian distribution symmetrically decreasing about the central axis 80. [

Accordingly, the time-average light intensity values of the optical signals input to the respective pixels of the image sensor 21 are different from each other, so that light amounts different from each other are detected on average.

When the quantum random number generation device is implemented by one light source 10 as described above, each pixel of the image sensor 21 according to the time-averaged light intensity value of the optical signal following the Gaussian distribution There is a problem that the time-averaged light intensity values of the optical signals input to the optical paths pi1 and pi2 can not be made uniform

Accordingly, the present invention proposes a method of implementing a quantum random number generation device using at least two light sources so that the time-average light intensity values of the optical signals radiated from the light source and input to the respective pixels become uniform do.

5 to 9, a configuration of a quantum random number generating apparatus according to an embodiment of the present invention for uniformizing a time-average light intensity value of an optical signal input to each pixel I will explain in detail.

As shown in FIG. 5, the LED used as a light source is a pn junction diode that provides a light effect. Therefore, it is possible to use an LED characteristic capable of easily expanding and connecting a plurality of light sources in series, It is possible to uniformize the time-average light intensity value of the optical signal input to each of the pixels by simply connecting the plurality of light sources 10 ₁ - 10 _n in series without adding a circuit configuration And generates a quantum random number generator.

Therefore, the present invention can simplify a hardware structure more easily than adding a light wave guide separately to implement a quantum random number generation apparatus using an existing light source, So that it can be downsized.

The quantum random number generation apparatus 100 according to an embodiment of the present invention implemented according to the LED characteristics described above includes a light source management unit 110 and a random number generation unit 120 as shown in FIG.

The light source management unit 110 may include a light source unit 111 including at least two light sources and a time-average light intensity value detector for detecting a time-averaged light intensity value of an optical signal radiated from at least two light sources, Wherein at least two light sources are arranged in each pixel of the plurality of light receiving pixels when the combined optical signals radiated from at least two light sources are input to the plurality of light receiving pixels, And is arranged so that the time-average light intensity value of the input optical signal becomes uniform.

The random number generation unit 120 generates a random number using quantization noise of light intensity values input to a plurality of light receiving pixels, that is, light quantities.

More specifically, referring to FIG. 7, the light source unit 111 includes at least two light sources. In the present invention, it is assumed that the optical signals emitted by at least two light sources are the same.

That is, the light source unit 111 may include a plurality of light sources (for example, two, four, six, or more) arranged symmetrically according to the size and performance of the quantum random number generating apparatus to be manufactured. At this time, the number of light sources is not limited.

Hereinafter, for convenience of explanation, it will be described that the two light sources 111a and 111b are arranged symmetrically.

The light detecting unit 112 may be an image sensor such as the above-mentioned CMOS and CCD sensor.

The light detecting unit 112 includes a plurality of light receiving pixels (e.g., pixels in the image sensor) 1121 for detecting an optical signal emitted from the two light sources 111a and 111b.

Hereinafter, the arrangement structure of the light source management unit 110 for uniformizing the time-averaged light intensity values of the optical signals input to the plurality of light receiving pixels will be described in more detail with reference to FIG.

7, the light source unit 111 and the light detection unit 112 provided in the light source management unit 110 are disposed on the same substrate 113. In this case,

When the light source unit 111 and the light detecting unit 112 are disposed on a single substrate 133 in the form of a chip for miniaturization and mass production of the quantum random number generating apparatus, The optical signal radiated from the light source unit 111 is naturally reflected.

More specifically, the two light sources 111a and 111b are arranged symmetrically with respect to the light detecting unit 112. [

That is, when the two light sources 111a and 111b are positioned on the same substrate 113 as the light detecting unit 112, the two light sources 111a and 111b are arranged in a matrix of the light receiving pixels 1121 And are arranged symmetrically with equal spacing from the optical detector 112 so that the time-average light intensity values become uniform.

In the present invention, although the two light sources 111a and 111b are described as being spaced from the light detecting unit 112 at equal intervals, the amount of current applied to the light sources 111a and 111b may be controlled, 1121 may be controlled so that the time-average light intensity values of the optical signals input to the optical fibers 1121 and 1121 become uniform.

At this time, in the optical signal at the position of the image sensor composed of a plurality of light receiving pixels, the time-average light intensity value of each optical signal emitted by the two light sources 111a and 111b is spatially It follows a Gaussian distribution.

That is, the time-averaged light intensity value of the optical signal emitted by the light source 111a follows the first Gaussian distribution G1, and the time-average of the optical signal emitted by the light source 111b the time-average light intensity value follows the second Gaussian distribution G2.

The overall distance D between the center axes of the light sources 111a and 111b arranged symmetrically with respect to the image sensor has the same light intensity distribution characteristic as the first Gaussian distribution G1 and the second Gaussian distribution G2 , It can be determined by the standard deviation (?), But if it is determined to be twice the standard deviation, it is possible to obtain the uniform distribution section (R1).

In this case, when the two light sources 111a and 111b are disposed on the basis of the light detecting unit 112 as described above, the distance between the light sources 111a and 111b and the light detecting unit 112 . That is, it is necessary to find an optimal light intensity distribution capable of maintaining the characteristics of the Poisson distribution. This is because the amount of current applied to each of the light sources 111a and 111b is controlled, It becomes possible by adjusting the intensity of light.

More specifically, by adjusting the light intensity, the standard deviation can be adjusted, which means that the distance between the two light sources can be adjusted and minimized.

Of course, in the present invention, since the light is reflected through the cover surface of the random number generator, the characteristics of the light intensity distribution do not exactly follow the Gaussian distribution, and the light source does not exactly follow the Gaussian distribution (sum of Gaussian distributions, sum of cosine powers Etc). However, the characteristics of weakening the light intensity farther from the light source are similarly maintained, and the amount of current applied to the light sources is controlled in a state where the interval between the plurality of light sources is minimized, The light intensity input to each pixel of the image sensor can be made uniform.

Hereinafter, a flow of generating a random number by uniformizing a time-average light intensity value of an optical signal input to a plurality of light receiving pixels in the light source management unit 110 when the distribution of the light source has a Gaussian distribution I will explain it concretely.

Referring to FIGS. 7 and 8, a plurality of light receiving pixels 1121 detect optical signals emitted from at least two light sources (S100, S110).

More specifically, when the light source 111a and the light source 111b are symmetrically disposed on the substrate 113 with respect to the light detecting unit 112, when the light signal emitted from the light source 111a is reflected on the cover surface 114 The plurality of light receiving pixels 1121 receive the time-average light intensity value of the optical signal corresponding to the first Gaussian distribution G1 formed in the entire interval D,

That is, among the plurality of light-receiving pixels 1121, the light-receiving pixels nearest to the light source 111a receive the largest time-averaged light intensity value, and the other light-receiving pixels gradually become farther from the light source 111a The time-averaged light intensity value gradually decreases corresponding to the decreasing first Gaussian distribution G1.

The plurality of light receiving pixels 1121 are arranged such that when the optical signal emitted from the light source 111a is reflected on the cover surface 114, the time-averaged light intensity value of the optical signal emitted from the light source 111a, Asymmetrically according to the first Gaussian distribution (G1) formed within the first Gaussian distribution (G1).

While a plurality of light receiving pixels 1121 receive time-averaged light intensity values of an asymmetrical optical signal from the light source 111a as described above, optical signals are also radiated from the light source 111b and reflected on the cover surface 114 Receiving pixels 1121 receive the time-averaged light intensity values of the optical signals corresponding to the second Gaussian distribution G2 formed in the entire interval D at the same time.

That is, among the plurality of light-receiving pixels 1121, the light-receiving pixels nearest to the light source 111b receive the largest time-averaged light intensity value, and the other light-receiving pixels gradually become farther from the light source 111b The time-averaged light intensity value gradually decreases corresponding to the decreasing second Gaussian distribution G2.

Accordingly, the plurality of light receiving pixels 1121 receive asymmetrically the time-averaged light intensity value of the optical signal emitted from the light source 111a according to the first Gaussian distribution G1, and simultaneously receive the light emitted from the light source 111b Since the time-averaged light intensity values of the signals are asymmetrically input according to the second Gaussian distribution G2, the sum of the Gaussian distributions of the time-averaged light intensity values of the combined optical signals emitted from the respective light sources 111a and 111b The asymmetry is mutually compensated to secure the uniform distribution section R1 so that a uniform amount of light is received.

At this time, the amount of current applied to the light sources 111a and 111b is adjusted so that the size of the quantum random number generating device is minimized, and the light sources 111a and 111b search for an optimal light intensity distribution capable of maintaining the Poisson distribution characteristic, Adjust the distance between and minimize.

Since a uniform light amount can be obtained in the plurality of light-receiving pixels 1121, the random number using the quantum noise in each pixel can be maintained at the same level, and a random number of high quality can be generated using this random number (S120) .

In the above description, the quantum random number generation device in which two light sources are symmetrically arranged on the basis of the photodetector portion is described as an example of uniformizing the spatial light intensity distribution of the optical signal radiated from the light source and input to each pixel, The four light sources 111a, 111b, 111c, and 111d may be symmetrically arranged with respect to the light detecting unit 112 as shown in FIG.

That is, the light source 111a and the light source 111b are arranged symmetrically with respect to the light detecting unit 112 in the first direction x, and the light source 111c and the light source 111d are disposed with respect to the light detecting unit 112, Are arranged symmetrically in a second direction (y) perpendicular to the first direction (x).

When a plurality of light sources are arranged in a row along each surface of the optical detector 112 so as to be spaced twice the standard deviation, a uniform distribution section R2 of a predetermined range of light intensity equal to It is possible to use more than four light sources according to the size and performance requirements of the quantum random number generating device.

Although the present invention has been described with reference to the case where the photodetector 112 has four surfaces, the present invention is not limited thereto. Even when the photodetector 112 is formed in a circular shape, a light source may be disposed so as to surround the circle, .

That is, if the light sources are arranged symmetrically with respect to the light detecting unit 112 regardless of the number of the light sources, the plurality of light receiving pixels 1121 emit the time-averaged light intensity value of the optical signal radiated from the light source and input to each pixel It is possible to receive the input uniformly.

In the present invention, the Gaussian distribution is used as an example in order to uniform the spatial intensity distribution of the optical signal radiated from the light source and input to each pixel. However, the present invention is not limited to this, The spatial intensity distribution of the optical signal input to each pixel can be uniformly obtained by radiating from the light source in a similar manner to any distribution characteristic that can be obtained.

As described above, according to the present invention, since the time-average light intensity values of the optical signals radiated from the light source and input to the respective pixels are uniformly input, the randomness of the light- The same effect can be obtained.

In addition, in the implementation of the quantum random number generation apparatus according to the present invention, the light source is symmetrically arranged with respect to the optical detection unit without performing a complicated process of adding a separate circuit, thereby simplifying the hardware configuration, The size can be minimized.

Also, the quantum random number generation apparatus according to the present invention can uniformize the time-average light intensity values of the optical signals input to the respective light receiving pixels, so that the post-processing step of analyzing the output values of the respective light receiving pixels The complexity of the algorithm can be reduced, and the excellent randomness of the output value can be kept the same.

Meanwhile, the steps of a method or algorithm or control function described in connection with the embodiments disclosed herein may be embodied directly in hardware, or may be implemented in the form of a program instruction that may be executed via various computer means, . The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the random number generation apparatus having the function of uniformly controlling the spatial light intensity distribution of the optical signal using the plurality of light sources of the present invention, the time-average value of the light intensity input to each pixel of the image sensor is made uniform It is possible to carry out not only the use of related technology but also the possibility of commercialization or sales of the applied device, but also to be practically and practically possible, to be.

100: Quantum random number generation device 110: Light source management unit
111: Light source units 111a, 111b, 111c, 111d:
112: light detecting portion 1121: light receiving pixel
113: substrate 114: cover surface

Claims (7)

At least two light sources;
A photodetector including at least one light receiving pixel for detecting an optical signal emitted from the at least two light sources; And
And a random number generator for generating a random number using quantum noise of the amount of light detected by the light receiving pixel,
Wherein the at least two light sources are configured such that a time-average light intensity value of an optical signal input to each pixel of the light-receiving pixel when the combined optical signal radiated from the at least two light sources is input to the light- Wherein the optical detector is symmetrically disposed about the optical detector. The method according to claim 1,
Wherein the at least two light sources comprise:
Wherein the optical signal generating unit is arranged to be symmetrical with respect to the optical detecting unit at a minimum distance at which a time-average light intensity value of the optical signal becomes uniform. The method according to claim 1,
Wherein the at least two light sources are disposed at the same distance from the optical detection unit when the at least two light sources are located on the same substrate as the optical detection unit. The method according to claim 1,
Wherein the control unit adjusts the arrangement position of the at least two light sources so that a time-average light intensity value of the optical signal becomes uniform, and controls an amount of current of at least one of the at least two light sources Generating device. The method according to claim 1,
The time-averaged light intensity values of the optical signals respectively emitted by the at least two light sources each follow at least one distribution characteristic that the light source can have,
Wherein a spacing between light sources symmetrical to each other among the at least two light sources is determined based on the at least one distribution characteristic. 6. The method of claim 5,
Wherein when the distribution characteristic is a Gaussian distribution, the interval between the light sources in symmetry with each other is twice the standard deviation of the Gaussian distribution. The method according to claim 1,
And a cover surface for reflecting optical signals emitted from the at least two light sources.

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