Quantum entropy source

Abstract

The utility model discloses a quantum entropy source, and belongs to the technical field of quantum information communication. The utility model provides a quantum entropy source. The quantum entropy source comprises a light source assembly; the lens assembly is arranged on the light emitting side of the light source assembly and refracts the light generated by the light source assembly and then emits the light in parallel; the photoelectric detection array is arranged on an emergent light path of the lens assembly and is used for converting parallel emergent light of the lens assembly into an analog signal; and the random sequence digitization module is connected with the photoelectric detection array and is used for carrying out digitization processing on the analog signal to generate a random sequence. According to the quantum entropy source, the lens converts scattered light generated by the light source assembly into parallel light, the photoelectric detector array converts an optical signal into an analog electric signal, the random sequence digitization module generates an original random sequence through analog-to-digital conversion, and the lens converts the scattered light generated by the light source assembly into parallel light with uniform intensity. A random sequence with better randomness can be generated, and the implementation is convenient and simple.

Description

Technical Field

[0001] The present application belongs to the field of quantum information communication technology, and in particular, relates to a quantum entropy source. Background Art

[0002] Quantum entropy sources usually use the unpredictability of the behavior of microscopic particles to generate high-quality random numbers, which can be used in a variety of applications such as encryption, simulation, and prediction, making quantum entropy sources have extremely high application value in the field of information security and the communications industry.

[0003] Common quantum entropy sources mainly include branch path entropy source, spontaneous radiation noise entropy source, phase noise entropy source and multi-photon state measurement entropy source. In the prior art, for quantum entropy sources based on multi-photon state measurement, it is difficult to prepare incident light with very uniform scattering particles using common light-emitting devices, so the randomness of the quantum entropy source is difficult to ensure quality. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a quantum entropy source, which converts the scattered light generated by the light source assembly into parallel light through a lens, can generate a random sequence with good randomness, and is easy to implement.

[0005] In a first aspect, the present application provides a quantum entropy source, comprising:

[0006] Light source assembly;

[0007] The lens assembly is arranged on the light-emitting side of the light source assembly, and refracts the light generated by the light source assembly and emits it in parallel;

[0008] The photoelectric detection array is arranged on the outgoing light path of the lens assembly and converts the parallel outgoing light of the lens assembly into an analog signal;

[0009] The random sequence digitization module is connected to the photoelectric detection array to digitize the analog signal and generate a random sequence.

[0010] According to the quantum entropy source of the present application, the lens is used to convert the scattered light generated by the light source assembly into parallel light, so that the light intensity irradiated to the surface of the photodetector array is uniform. The photodetector array converts the optical signal into an electrical signal. The random sequence digitization module generates a random sequence through analog-to-digital conversion. The scattered light generated by the light source assembly is converted into parallel light through the lens, which can generate a random sequence with good randomness, and the implementation is convenient and simple.

[0011] According to one embodiment of the present application, the quantum entropy source further includes:

[0012] A base having a perforation;

[0013] An upper cover cooperates with the base to form a closed cavity;

[0014] A housing, surrounding the base and the upper cover arrangement;

[0015] The electrical pin is inserted into the through hole.

[0016] Among them, the light source component, the lens component and the photoelectric conversion and digitization device are all arranged in a closed cavity. The photoelectric conversion and digitization device integrates a photoelectric detection array and a random sequence digitization module, and is connected to the electrical pins.

[0017] According to one embodiment of the present application, the base includes a bottom plate and a first enclosure provided on one side of the bottom plate and perpendicular to the base, the upper cover includes a cover plate and a second enclosure provided on one side of the cover plate and perpendicular to the cover plate, the first enclosure is connected to a side away from the base and to a side away from the cover plate by the second enclosure to form a closed cavity, and the outer shell is arranged around the first enclosure and the second enclosure.

[0018] According to one embodiment of the present application, the inner surface of the base and the inner surface of the upper cover are both black.

[0019] According to an embodiment of the present application, the light source assembly is disposed on the inner surface of the upper cover, and the photoelectric conversion and digitization device is disposed on the inner surface of the base.

[0020] According to one embodiment of the present application, the lens assembly is disposed at the connection between the first enclosure and the second enclosure.

[0021] According to one embodiment of the present application, the length, width or height of the quantum entropy source is less than or equal to 25 mm.

[0022] According to one embodiment of the present application, the lens assembly includes a biconvex lens, the photoelectric detection array is arranged on a vertical plane on the main optical axis path of the outgoing light of the biconvex lens, and the light source assembly is located at the focus on the main optical axis of the convex lens.

[0023] According to an embodiment of the present application, an anti-reflection film is provided on the surface of the biconvex lens, and the light transmittance of the anti-reflection film gradually weakens along the edge of the biconvex lens toward the center.

[0024] According to one embodiment of the present application, the light source assembly includes an LED light source or a laser light source.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1It is a structural block diagram of the quantum entropy source provided in the embodiment of the present application;

[0028] Figure 2 is a graph showing the relationship between the light intensity and the emission angle of a light emitting diode provided in an embodiment of the present application;

[0029] Figure 3 is a front view of a quantum entropy source provided in an embodiment of the present application;

[0030] Figure 4 The embodiment of this application provides Figure 3 Sectional view along HH;

[0031] Figure 5 is a three-dimensional diagram of a quantum entropy source provided in an embodiment of the present application;

[0032] Figure 6 It is a side view of the quantum entropy source provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] Lens assembly 1, electrical pin 2, housing 3, upper cover 4, base 5, photoelectric conversion and digitization device 6, photoelectric detection array 61, random sequence digitization module 62, light source assembly 7. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0036] The following description relates to elements or components that are "connected" or "coupled" together. As used herein, "connection" may refer to an element / component being mechanically coupled to (or directly connected to) another element / component, and is not necessarily direct. Similarly, "coupling" may refer to an element / component being directly or indirectly coupled to (or directly or indirectly connected to) another element / component, and is not necessarily mechanical. However, it should be understood that although in one embodiment, two elements are described below as "connected", similar elements may be "coupled" in alternative embodiments, and vice versa. Therefore, although the schematic diagram shown here describes an exemplary arrangement of elements, additional intermediate elements, devices, parts or components may still exist in a practical embodiment.

[0037] Quantum entropy sources are based on the inherent randomness of quantum mechanics and can generate true random numbers. Such random numbers are completely unpredictable and can be used in a variety of applications, such as encryption, simulation, and prediction, making quantum entropy sources extremely valuable in the fields of information security and the communications industry. Common quantum entropy sources include branch path entropy sources, spontaneous radiation noise entropy sources, phase noise entropy sources, and entropy sources based on multi-photon state measurements.

[0038] In the related art, for the quantum entropy source based on multi-photon state measurement, in order to ensure that the light intensity irradiated to each detection direction of the light source detection device is maintained within a certain range, the light emitted by the light source is usually diffusely reflected to form a relatively uniform light intensity, and then the light detection device performs photoelectric conversion to generate a random sequence based on the quantum effect. Since the surface roughness of the reflective object using diffuse reflection is difficult to control, this will directly affect the uniformity of the light intensity. When the uniformity of the light intensity is not ideal, the randomness of the quantum entropy source is difficult to ensure quality. Therefore, in order to select a suitable diffuse reflection surface, it is necessary to repeatedly test according to a certain light intensity, which consumes a lot of manpower and material resources, and the randomness of the random sequence is not ideal. Even if it is tested that the surface material of a specific device meets the reflection requirements, it is difficult to achieve mass production consistency.

[0039] The present application proposes a quantum entropy source, which converts the scattered light generated by the light source assembly 7 into parallel light through a lens, can generate a random sequence with good randomness, and is easy to implement.

[0040] Reference Figure 1 , Figure 1 The structure of the quantum entropy source provided by an embodiment of the present application is shown. An embodiment of the present application proposes a quantum entropy source, comprising: a light source assembly 7, a lens assembly 1, a photodetection array 61, and a random sequence digitization module 62. The lens assembly 1 is arranged on the light-emitting side of the light source assembly 7, and refracts the light generated by the light source assembly 7 and emits it in parallel; the photodetection array 61 is arranged on the light-emitting light path of the lens assembly 1, and converts the parallel emitted light of the lens assembly 1 into an analog signal; the random sequence digitization module 62 is connected to the photodetection array 61, and digitizes the analog signal to generate a random sequence.

[0041] The light source assembly 7 is mainly used to generate an optical signal, which contains quantum noise or quantum fluctuations, providing a basis for the subsequent extraction of random sequences. The specific type of the light source assembly 7 can be selected according to the actual application scenario and is not limited here. For example, the light source assembly 7 may include a semiconductor laser, a superluminescent diode, or a light emitting diode.

[0042] As an example, the light source assembly 7 includes a light emitting diode, which is cheap and can effectively reduce the cost of the entropy source.

[0043] Reference Figure 2 , Figure 2 The relationship between the light intensity and the emission angle of the light emitting diode is shown. Figure 2 0° to 90° is the light emitting angle of the LED, which is represented by a straight line in the figure; 0.1 to 1.0 is the relative intensity of the light intensity of the LED, which is represented by a straight line in the figure; Figure 2 Indicated by a curve; Figure 2 The thick black curve in the middle is the actual luminous intensity of the LED. Figure 2 It can be seen that the light intensity corresponding to 0° is the strongest, and the light intensity corresponding to 90° is the weakest. That is, as the light-emitting diode emission angle increases, the light intensity gradually decreases.

[0044] The lens assembly 1 is arranged on the light output side of the light source assembly 7. The lens assembly 1 can use the principle of light refraction to convert the scattered light emitted by the light source assembly 7 into parallel light, so that the light intensity irradiated to the photoelectric detection array 61 is uniform, effectively improving the randomness of the output random sequence.

[0045] As an example, the lens assembly 1 may include two single-sided convex lenses. The two single-sided convex lenses can be used back to back to realize the conversion of scattered light into parallel light. The principle is to first focus the scattered light emitted by the light source assembly 7 to its focal point through the first convex lens as the input of the second convex lens. After refraction by the second convex lens, parallel light can be output.

[0046] The photodetection array 61 includes a plurality of photodetectors evenly arranged in the same plane, and the photodetectors may include avalanche photodiodes, photoelectric image sensors, or phototransistors. The photodetection array 61 is distributed on a vertical plane at a specified distance on the main optical axis path of the outgoing light of the lens assembly 1, and is used to detect weak light signals that have been refracted and homogenized, and convert the light signals into electrical signals. The photodetection array 61 is connected to the random sequence digitization module 62, and the electrical signals can be transmitted to the random sequence digitization module 62 in the form of analog signals.

[0047] In other embodiments, the photodetection array 61 may also include a series of highly sensitive single-pixel detectors or integrated detector arrays. Highly sensitive single-pixel detectors or integrated detectors can efficiently convert parallel light signals output by the lens assembly into electrical signals, i.e., analog signals. In order to capture weak signals at the quantum level, the photodetection array can also be equipped with efficient signal amplification and filtering circuits to achieve a low-noise, high-response speed design to ensure the authenticity and accuracy of the signal.

[0048] The random sequence digitization module 62 is responsible for digitizing the received analog signal, including steps such as amplification, filtering, sampling and quantization, and finally generating a binary random sequence. The specific structure of the random sequence digitization module 62 can be selected according to the actual application scenario and is not limited here. For example, the random sequence digitization module 62 may include a comparator or an analog-to-digital converter.

[0049] In some embodiments, the random sequence digitization module 62 also has powerful data storage and communication capabilities, and can transmit the generated random sequence to an external device or storage medium in real time.

[0050] According to the quantum entropy source of the present application, the lens is used to convert the scattered light generated by the light source component 7 into parallel light, so that the light intensity irradiated to the surface of the photodetector array is uniform. The photodetector array converts the optical signal into an electrical signal. The random sequence digitization module 62 generates a random sequence through analog-to-digital conversion. The scattered light generated by the light source component 7 is converted into parallel light through the lens, which can generate a random sequence with good randomness, and the implementation is convenient and simple.

[0051] Reference Figures 3 to 6 In some embodiments, the quantum entropy source further includes: a base 5, an upper cover 4, a shell 3 and an electrical pin 2. The base 5 is provided with a through hole; the upper cover 4 cooperates with the base 5 to form a closed cavity; the shell 3 surrounds the base 5 and the upper cover 4; the electrical pin 2 is penetrated through the through hole; wherein the light source assembly 7, the lens assembly 1 and the photoelectric conversion and digitization device 6 are all arranged in the closed cavity, the photoelectric conversion and digitization device 6 integrates a photoelectric detection array 61 and a random sequence digitization module 62, and is connected to the electrical pin 2.

[0052] The base 5 and the upper cover 4 cooperate to form a closed cavity, which is used to protect the light source assembly 7, the lens assembly 1 and the photoelectric conversion and digitization device 6 inside the closed cavity from external interference; the outer shell 3 surrounds the base 5 and the upper cover 4, providing additional mechanical protection and electromagnetic shielding for the components inside the closed cavity; the electrical pin 2 is penetrated through the through hole of the base 5, and the electrical pin 2 can be electrically connected to an external circuit or device to power the quantum entropy source and output a random sequence.

[0053] The photoelectric conversion and digitization device 6 includes the aforementioned photoelectric detection array 61 and the random sequence digitization module 62, and is mainly used to realize the conversion of optical signals into electrical signals and finally generate a random sequence.

[0054] The auxiliary components such as the base 5, the upper cover 4, the housing 3 and the electrical pins 2 make the quantum entropy source a complete, compact and easy-to-integrate device, which is convenient for practical applications.

[0055] Reference Figure 4In some embodiments, the base 5 includes a bottom plate and a first enclosure disposed on one side of the bottom plate and perpendicular to the base, the upper cover 4 includes a cover plate and a second enclosure disposed on one side of the cover plate and perpendicular to the cover plate, the first enclosure is connected to the side of the second enclosure away from the cover plate away from the base 5 to form a closed cavity, and the outer shell 3 is arranged around the first enclosure and the second enclosure.

[0056] The base 5 may include a bottom plate and a first enclosure. The bottom plate, as the bottom support surface of the entire device, is usually made of high-strength, corrosion-resistant materials, such as aluminum alloy or stainless steel, to ensure the stability and durability of the device. The surface of the bottom plate may be flattened or coated with a protective layer as required to reduce potential interference with internal components.

[0057] The first enclosure is perpendicular to the base 5, forming a preliminary enclosure for the internal space. The first enclosure is usually made of the same or compatible material as the base plate, and is firmly connected to the base plate by welding, screwing or other reliable connection methods. The top edge of the first enclosure is usually designed with an interface structure that matches the second enclosure to ensure that the two can be tightly connected to form a complete closed cavity. The upper cover 4 is mainly composed of a cover plate and a second enclosure. As the main covering surface, the cover plate is also made of high-strength, corrosion-resistant materials to protect the internal components from the external environment. The shape and size of the cover plate must match the base 5 to ensure that the two can be tightly closed.

[0058] The second enclosure is arranged on one side of the cover plate and is perpendicular to the cover plate. It cooperates closely with the first enclosure to form a closed cavity. The bottom edge of the second enclosure is usually designed with an interface structure that matches the top edge of the first enclosure to ensure that the two can be accurately docked and locked.

[0059] The housing 3 is usually arranged around the first enclosure and the second enclosure, and is tightly attached to the outside of the first enclosure and the second enclosure by screw fixation, snap connection or other reliable connection methods. The material of the housing 3 can be selected according to specific needs, such as metal, plastic or composite material, to provide sufficient mechanical strength and protection performance.

[0060] In some embodiments, the inner surface of the base 5 and the inner surface of the upper cover 4 are both black.

[0061] The light source assembly 7 can generate light at any angle. The inner surface of the base 5 and the inner surface of the upper cover 4 are both black, which can absorb the scattered light emitted by the light source assembly 7, help reduce internal reflection and scattering of light, and avoid uneven light reaching the lens assembly 1 and even the photoelectric detection array 61.

[0062] In some embodiments, the light source assembly 7 is disposed on the inner surface of the upper cover 4 , and the photoelectric conversion and digitization device 6 is disposed on the inner surface of the base 5 .

[0063] The light source assembly 7 is arranged on the inner surface of the upper cover 4, which can ensure that the optical signal can be directly and efficiently transmitted downward after being generated, reducing the loss and interference in the transmission process. The lens assembly 1 is arranged between the inner surface of the upper cover 4 and the inner surface of the base 5, and the light source assembly 7 is located at the focus on the main optical axis of the lens assembly 1, so as to ensure that the weak light generated by the light source assembly 7 is incident on the surface of the photoelectric conversion and digitization device 6 in the form of parallel light after being refracted by the lens assembly 1, and the photoelectric conversion and digitization device 6 performs photoelectric conversion, amplification, filtering, sampling and quantization, etc., and then outputs a binary random sequence.

[0064] In some embodiments, the lens assembly 1 is disposed at the connection between the first enclosure and the second enclosure.

[0065] The distance between the connection between the first enclosure and the second enclosure and the light source assembly 7 is equal to the focal length of the lens assembly 1, so that the light source assembly 7 is located at the focus on the main optical axis of the lens assembly 1. Placing the lens assembly 1 at the connection between the first enclosure and the second enclosure can ensure the stability and accuracy of its position and avoid the degradation of optical performance due to position offset or looseness. In addition, the lens assembly 1 can guide the light signal emitted by the light source assembly 7 to enter the photoelectric conversion and digitization device 6 at the best angle and path, minimize the loss and scattering of the light signal, and not only improve the random sequence generation efficiency of the quantum entropy source, but also significantly improve the stability and consistency of its output signal.

[0066] In some embodiments, the length, width or height of the quantum entropy source is less than or equal to 25 mm.

[0067] The length, width or height of the quantum entropy source is less than or equal to 25 mm. On the premise of ensuring its performance, it can be integrated into various miniaturized, portable or integrated quantum information systems, such as quantum key distribution systems, quantum random number generators, etc.

[0068] The length, width and height of the quantum entropy source can be the same or different. The specific values ​​of the length, width and height of the quantum entropy source can be selected according to the actual application scenario and are not limited here. For example, the length of the quantum entropy source is 24mm, the width is 24mm, and the height is 22mm, or the length of the quantum entropy source is 25mm, the width is 25mm, and the height is 23mm; or the length, width and height of the quantum entropy source are all 25mm.

[0069] In some embodiments, the lens assembly 1 includes a biconvex lens, the photoelectric detection array 61 is arranged on a vertical plane on the main optical axis path of the outgoing light of the biconvex lens, and the light source assembly 7 is located at the focus on the main optical axis of the convex lens.

[0070] The two side surfaces of the biconvex lens are convex outwards. When the light source assembly 7 is located at the focal point of the lens, the emitted light will be emitted parallel to the main optical axis of the lens after passing through the lens. The photoelectric detection array 61 is arranged on a vertical plane on the main optical axis path of the output light of the biconvex lens, ensuring that all the light refracted by the biconvex lens can accurately fall on the photoelectric detection array 61, thereby realizing efficient collection of optical signals.

[0071] In some embodiments, an anti-reflection film is disposed on the surface of the biconvex lens, and the light transmittance of the anti-reflection film gradually weakens along the edge of the biconvex lens toward the center.

[0072] The surface of the biconvex lens is treated with an anti-reflection film, and the light transmittance decreases from the edge to the center. The central area of ​​the biconvex lens is often the key part for focusing light. Therefore, by appropriately reducing the light transmittance of the central area, the focusing effect and energy distribution of the light can be adjusted to a certain extent, so that the light intensity that finally reaches the photoelectric detection array 61 is more uniform and stable.

[0073] In some embodiments, the light source assembly 7 includes an LED light source or a laser light source.

[0074] The LED light source can be an infrared LED, a visible LED or an ultraviolet LED. The light emitted by the LED light source conforms to the Poisson distribution, and the number of photons received by the photodetection array 61 also conforms to the Poisson distribution, so the electrical signal converted from the optical signal can be digitized to generate a random sequence.

[0075] The laser light source has good parallelism of emitted light, which can more accurately control the propagation path of photons in quantum random number generation, thereby improving the accuracy and efficiency of random number generation.

[0076] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0078] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0079] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A quantum entropy source, characterized in that: include: Light source assembly; A lens assembly is provided on the light-emitting side of the light source assembly, and refracts the light generated by the light source assembly and emits it in parallel; A photoelectric detection array is arranged on the outgoing light path of the lens assembly and converts the parallel outgoing light of the lens assembly into an analog signal; The random sequence digitization module is connected to the photoelectric detection array, and performs digital processing on the analog signal to generate a random sequence.

2. The quantum entropy source according to claim 1, characterized in that: The quantum entropy source also includes: A base having a perforation; An upper cover cooperates with the base to form a closed cavity; A housing, surrounding the base and the upper cover; An electrical pin is inserted into the through hole; The light source assembly, the lens assembly and the photoelectric conversion and digitization device are all arranged in the closed cavity. The photoelectric conversion and digitization device integrates the photoelectric detection array and the random sequence digitization module and is connected to the electrical pin.

3. The quantum entropy source according to claim 2, characterized in that: The base includes a bottom plate and a first enclosure disposed on one side of the bottom plate and perpendicular to the base, the upper cover includes a cover plate and a second enclosure disposed on one side of the cover plate and perpendicular to the cover plate, the first enclosure is connected to a side away from the base and to a side away from the cover plate by the second enclosure to form the closed cavity, and the outer shell is arranged around the first enclosure and the second enclosure.

4. The quantum entropy source according to claim 3, characterized in that: The inner surface of the base and the inner surface of the upper cover are both black.

5. The quantum entropy source according to claim 4, characterized in that: The light source assembly is arranged on the inner surface of the upper cover, and the photoelectric conversion and digitization device is arranged on the inner surface of the base.

6. The quantum entropy source according to claim 3, characterized in that: The lens assembly is arranged at the connection between the first enclosure and the second enclosure.

7. The quantum entropy source according to claim 3, characterized in that: The length, width or height of the quantum entropy source is less than or equal to 25 mm.

8. The quantum entropy source according to any one of claims 1 to 7, characterized in that The lens assembly includes a biconvex lens, the photoelectric detection array is arranged on a vertical plane on the main optical axis path of the outgoing light of the biconvex lens, and the light source assembly is located at the focus on the main optical axis of the convex lens.

9. The quantum entropy source according to claim 8, characterized in that: An anti-reflection film is provided on the surface of the biconvex lens, and the light transmittance of the anti-reflection film gradually weakens along the edge of the biconvex lens toward the center.

10. The quantum entropy source according to any one of claims 1 to 7, characterized in that: The light source assembly includes an LED light source or a laser light source.

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