CN218512298U

CN218512298U - Fruit and vegetable detection equipment and light homogenization device thereof

Info

Publication number: CN218512298U
Application number: CN202222713285.6U
Authority: CN
Inventors: 朱二; 朱壹
Original assignee: Jiangxi Reemoon Technology Holdings Co Ltd
Current assignee: Lvmeng Technology Co.,Ltd.
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-02-21
Anticipated expiration: 2032-10-14

Abstract

The utility model relates to the field of fruit and vegetable detection, and discloses a fruit and vegetable detection device and a light homogenization device thereof, wherein the fruit and vegetable detection device comprises a light source device used for emitting light beams to fruits and vegetables to be detected; the light homogenizing device comprises a cavity and a light reflecting piece, wherein the cavity is provided with a light incident port and a light emergent port, the light incident port is used for receiving diffuse transmission light penetrating through fruits and vegetables to be detected, the light reflecting piece is arranged on the inner wall of the cavity, and the light reflecting piece is used for reflecting the diffuse transmission light which is incident into the cavity through the light incident port in the cavity to form a uniform light field; the light receiving device is used for receiving the light beam to be detected from the uniform light field formed by the light homogenizing device through the light outlet; and the detection device is used for receiving the light beam to be detected from the light receiving device for analysis. Through forming even light field in the light homogenization device, and then make detection device can receive the waiting of homogeneous mixing and detect the light beam for spectral analysis's accuracy improves, thereby obtains more accurate fruit vegetables pathological change testing result.

Description

Fruit vegetables check out test set and light homogenization device thereof

Technical Field

The utility model relates to a fruit vegetables detection area especially relates to a fruit vegetables check out test set and light homogenization device thereof.

Background

The fresh fruits and vegetables contain a large amount of vitamins and also contain rich mineral substances (such as potassium, calcium, magnesium and phosphorus), dietary fibers (particularly insoluble fibers), organic acids, various phytochemicals (such as carotenoids, flavonoids and various phytopigments) and the like, so the fresh fruits and vegetables are greatly helpful for the health of human bodies, however, if the fruits and vegetables are placed for a long time to cause pathological changes in the fruits and vegetables, the fruits and vegetables with pathological changes are slightly likely to be dizziness, nausea and vomiting, and if the conditions are serious, the fruits and vegetables are feared to cause injuries to nervous systems; therefore, the requirements for testing the internal quality of the fruits and vegetables are becoming wide nowadays, and the near infrared spectrum detection method can meet the requirement for rapidly detecting a large number of fruits and vegetables.

The conventional steps for testing the internal quality of fruits and vegetables generally comprise that diffuse transmission light is formed after a light source irradiates the fruits and vegetables, then the diffuse transmission light is received by a receiving end and is transmitted to a spectrometer for spectral analysis, and finally a result of whether the fruits and vegetables are diseased or not is obtained;

in the prior art, the receiving end generally directly receives the light beam to be detected by using the optical fiber or transmits the light beam to be detected to the optical fiber after being gathered by using the condenser lens, however, the light beams to be detected received by the two receiving structures are uneven light beams, and the uneven light beams can cause the accuracy of the spectrometer during spectral analysis to be reduced, thereby causing the pathological change detection result of fruits and vegetables.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a aim at providing a fruit vegetables check out test set and light homogenization device thereof to solve among the prior art fruit vegetables detection time measuring spectral analysis's the technical problem that the accuracy is low.

The embodiment of the utility model provides a solve its technical problem and adopt following technical scheme:

provided is a light uniformizing apparatus including: the cavity is provided with a light incidence port and a light emergence port;

the light reflection piece is arranged on the inner wall of the cavity and used for reflecting the light beam which enters the cavity through the light entrance port to form an even light field in the cavity.

In this embodiment, the optical field of homogeneous mixing can be obtained in the cavity for detection device can receive the light beam that waits that the homogeneous mixing waits, and then makes detection device's spectral analysis accuracy improve, thereby obtains more accurate fruit vegetables pathological change testing result. In addition, because the diffuse transmission light forms an even light field in the cavity, the light beams leaving the cavity at any position are the same, and the light beams can be stably received at any position on the cavity, so that the position of the light exit port is not limited, the light exit port can be arranged at any position on the cavity according to actual conditions, and further the light transmission device is connected, and the installation freedom of other devices in the fruit and vegetable detection equipment is improved.

In some embodiments, the light reflector comprises: and the light reflection layer is arranged on the inner wall of the cavity.

In the embodiment, the light reflecting layer is arranged on the inner wall of the cavity, the manufacturing process is simple, the occupied space of the reflecting layer is small, the internal space of the cavity is large, and the uniform light field is favorably formed in the cavity.

In some embodiments, the light reflecting layer is a light diffusing reflecting layer.

In this embodiment, the light diffuse reflection layer has a rough surface, and light can be reflected by the rough surface to all directions at random, through such setting, make the diffuse transmission light that gets into the cavity inside reflect to all directions by the light reflection layer, make and form even light field more easily inside the cavity.

In some embodiments, the light-homogenizing device further includes a light-filtering element disposed on the cavity and covering the light-incident port.

In this embodiment, locate the filter on the cavity and cover the light entrance, accessible filter filters non-detection band light beam, and then makes detection band light beam get into the cavity and reflects formation even light field, prevents that low band light beam from causing the influence to the testing result of vegetables and fruits pathological change, increases the accuracy that detects.

In some embodiments, the filter is a band pass filter.

In this embodiment, the band pass filter has the effect of detecting the high through rate of wave band, and the low through rate of non-detection wave band for it filters the light beam of non-detection wave band, improves the accuracy of detection.

In some embodiments, the light homogenizing device further includes a reflector disposed in the cavity, a reflective surface of the reflector faces the light entrance port, and the reflector is configured to reflect diffuse transmission light that is directly emitted from the light entrance port to the light exit port.

In this embodiment, diffuse transmission light incident into the cavity through the light incident port can be prevented from directly exiting through the light exit port and entering the light receiving device, and uniformity of light beams received by the light receiving device can be further improved, so that detection accuracy and stability are improved.

In some embodiments, the mirror is a plane mirror or a spherical mirror or an aspherical mirror.

In this embodiment, the plane mirror, the spherical mirror, and the aspheric mirror have high light reflectivity, which is beneficial to the light beam to form a uniform light field in the cavity.

In some embodiments, the cavity is spherical or conical or elliptical.

In this embodiment, when the cavity is spherical, conical or elliptical, diffuse reflection of light in the cavity can be facilitated, and the light receiving device can be conveniently installed at any position on the cavity, thereby improving the flexibility of installing the light receiving device.

On the other hand, still provide a fruit vegetables check out test set, include:

the light source device is used for emitting light beams to the fruits and vegetables to be detected;

the light entrance port of the light homogenizing device is used for receiving diffuse transmission light penetrating through the fruits and vegetables to be detected;

the light receiving device is used for receiving the light beam to be detected from the uniform light field formed by the light homogenizing device through the light exit port;

and the detection device is used for receiving the light beam to be detected from the light receiving device for analysis.

In this embodiment, the optical field of homogeneous mixing can be obtained in the cavity for detection device can receive the waiting of homogeneous mixing and detect the light beam, and then makes detection device's spectral analysis accuracy improve, thereby obtains more accurate fruit vegetables pathological change testing result. In addition, because the diffuse transmission light forms an even light field in the cavity, the light beams leaving the cavity at any position are the same, and the light beams can be stably received at any position on the cavity, so that the position of the light exit port is not limited, the light exit port can be arranged at any position on the cavity according to actual conditions, and further the light transmission device is connected, and the installation freedom of other devices in the fruit and vegetable detection equipment is improved.

In some embodiments, the light receiving device includes an optical fiber, one end of the optical fiber is used for receiving the light beam to be detected from the uniform light field formed by the light homogenizing device through the light exit port, and the detecting device is used for receiving the light beam to be detected from the other end of the optical fiber.

In the embodiment, the optical fiber is used for receiving the light beam to be detected in the uniform light field, and transmitting the light beam to be detected to the detection device for detection, so that stray light can be reduced from entering the detection device, the detection result can be prevented from being subjected to error caused by the stray light, the detection accuracy is improved, and the transmission loss of the light beam to be detected can be reduced by transmitting the light beam to be detected through the optical fiber.

Compared with the prior art, the embodiment of the utility model provides an among fruit vegetables check out test set and the light homogenization device thereof, the light reflection piece is established at cavity inner wall, and the light reflection piece is used for incidenting to the diffuse transmission light in the cavity and reflects in order to form even light field in the cavity, through such setting, can obtain even light field in the cavity, and then make detection device can receive the waiting of homogeneous mixing and detect the light beam, make spectral analysis's accuracy improve, thereby obtain more accurate fruit vegetables pathological change testing result. In addition, because the diffuse transmission light forms an even light field in the cavity, the light beams leaving the cavity at any position are the same, and the light beams can be stably received at any position on the cavity, so that the position of the light exit port is not limited, the light exit port can be arranged at any position on the cavity according to actual conditions, and further the light transmission device is connected, and the installation freedom of other devices in the fruit and vegetable detection equipment is improved.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings which correspond to and are not to be construed as limiting the embodiments, in which elements having the same reference numeral designations represent like elements throughout, and in which the drawings are not to be construed as limiting in scale unless otherwise specified.

Fig. 1 is a schematic light path diagram of the fruit and vegetable detection device provided by the present invention;

fig. 2 is a schematic diagram of an optical path provided by an embodiment of the present invention;

fig. 3 is a schematic diagram of an optical path according to another embodiment of the present invention.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or intervening elements may be present. The terms "upper", "lower", "left", "right", "upper", "lower", "top" and "bottom" used in the present specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, a fruit and vegetable inspection apparatus 100 according to an embodiment of the present invention includes a light source device 10, a light uniformizing device 20, a light receiving device 30, and an inspection device 40. The light source device 10 is used for emitting light beams to fruits and vegetables to be detected. The light homogenizing device 20 comprises a cavity 201 and a light reflecting part 202, the cavity 201 is provided with a light incident port 2011 and a light exit port 2012, the light incident port 2011 is used for receiving diffuse transmission light penetrating through fruits and vegetables to be detected, the light reflecting part 202 is arranged on the inner wall of the cavity 201, and the light reflecting part 202 is used for reflecting the diffuse transmission light which is incident into the cavity 201 through the light incident port 2011 in the cavity 201 to form a uniform light field. The light receiving device 30 is used for receiving the light beam to be detected from the uniform light field formed by the light uniformizing device 20 through the light exit opening 2012. The detection device 40 is used for receiving the light beam to be detected from the light receiving device 30 for analysis.

The light reflection piece 202 is arranged on the inner wall of the cavity 201, the light reflection piece 202 is used for reflecting diffuse transmission light which is incident into the cavity 201 through the light incident port 2011 for multiple times in the cavity 201 to form an even light field, and through the arrangement, the evenly-mixed light field can be obtained in the cavity 201, so that the detection device 40 can receive the evenly-mixed light beam to be detected, the spectral analysis accuracy of the detection device 40 is improved, and a more accurate fruit and vegetable lesion detection result is obtained.

In some embodiments, the light source device 10 includes a halogen lamp, the light path direction of the halogen lamp faces the fruit and vegetable to be detected, the halogen lamp is connected with an external power source through a circuit, and then emits a light beam, wherein a part of the light beam penetrates through the fruit and vegetable to be detected, and furthermore, the light beam can also be connected with the external power source through a circuit through an LED lamp or a xenon lamp and then outwardly emits the light beam.

In some specific examples, most halogen lamps have a wavelength in the range of 340nm to 800nm, wherein the tungsten halogen lamp, continuous light source produced by StellarNet can produce a light source with a wavelength in the range of 350nm to 2500nm for spectrometer detection; most of the LED lamps have the wavelength range of 460nm-660nm, most of the xenon lamps have the wavelength range of 190nm-1100nm, and diffuse transmission light can be formed after fruits and vegetables are irradiated by light sources capable of emitting light in the wavelength ranges.

In some specific examples, the emission light source may be a point light source, a surface light source, a parallel light source, or the like, wherein it is preferable that the surface light source emits a light beam to cover the surface of the fruit and vegetable to be detected, and when the surface light source is used for irradiation, the surface light source emits the light beam facing the fruit and vegetable to be detected.

In some embodiments, the cavity 201 is made of a metal material, and the cavity 201 includes an inner wall and an outer wall, and the cavity 201 is hollow, and particularly, the inner wall is made of a light-proof material. The cavity 201 may also be made of other materials such as glass and plastic, and the cavity 201 may also be formed by splicing other materials such as metal material, glass and plastic.

In some embodiments, the cavity 201 is opened with a light entrance port 2011 and a light exit port 2012. The light entrance port 2011 communicates with the outer wall and the inner wall of the cavity 201, and light enters the inner wall of the cavity 201 through the light entrance port 2011. The light exit opening 2012 is also connected between the outer wall and the inner wall of the chamber 201, and light exits the chamber 201 through the light exit opening 2012. Through such an arrangement, the diffuse reflection light can enter the cavity 201 and then leave the cavity 201 through the light exit port 2012 after forming a uniform light field on the inner wall, wherein the light entrance port 2011 is arranged on the cavity 201 and is located in the light path direction of the light beam emitted by the light source device 10 penetrating through the fruits and vegetables to be detected, and is used for receiving the diffuse transmission light penetrating through the fruits and vegetables to be detected.

In some embodiments, the light reflector 202 includes a light reflecting layer disposed on the inner wall of the cavity 201. The light reflecting layer 2021 is preferably a coating with high diffuse reflectance, the coating with high diffuse reflectance is uniformly coated on the inner wall of the cavity 201, and by such arrangement, diffuse transmission light entering the cavity 201 can be efficiently reflected on the inner wall, so that a small part of light in the diffuse transmission light is absorbed by the inner wall of the cavity 201, and a large part of light is reflected by the light reflecting layer, so that the utilization rate of the light is maximized, and the diffuse transmission light entering the cavity 201 is reflected by the light reflecting layer to all directions, so that a uniform light field is more easily formed inside the cavity 201, wherein the coating used by the coating can be a barium sulfate coating, a teflon coating or a nano coating with high reflectance.

In other embodiments, the light reflecting layer may also be a mirror surface integrally formed on the inner wall of the cavity 201, wherein the shape of the integrally formed mirror surface is adapted to the shape of the cavity 201. When the cavity 201 is in one of a spherical shape, a conical shape, an elliptical shape, or the like, the integrally formed mirror surface is in one of a spherical shape, a conical shape, an elliptical shape, or the like, and in addition, the mirror surface can be contained in the cavity 201 after being spliced and bonded, and can also play a role of reflecting light beams in the cavity 201 for multiple times. In addition, the mirror surface can be a high diffuse reflection surface, a uniform coating with high diffuse reflection rate can be arranged on the mirror surface, the coating is made of a barium sulfate coating, a Teflon coating, a nano coating or other coating with high reflection rate, and the mirror surface can be plated with a metal film with high reflection rate, such as an aluminum film, a gold film, a silver film and the like; in addition, a novel reflective material such as silicon carbide may be provided on the mirror surface.

In some specific examples, a uniform optical field is formed in the cavity 201, so that the light beams leaving the cavity 201 at any position are the same, and the light beams can be stably received at any position on the cavity 201, so that the position of the light exit port 2012 is not limited, and the light exit port can be arranged on the cavity 201 according to actual conditions, thereby improving the degree of freedom in installation of other devices in the fruit and vegetable detection apparatus 100.

In some embodiments, the cavity 201 is further provided with the optical filter 203, the optical filter 203 corresponds to the light incident port 2011 and covers the light incident port 2011, and by such an arrangement, the non-detection waveband light beam can be filtered, so that the detection waveband light beam enters the cavity 201 to be reflected to form an even light field, the low waveband light beam is prevented from influencing the detection result of the vegetable and fruit pathological changes, and the detection accuracy is increased.

In some specific examples, the optical filter 203 may use a band-pass filter, and the band-pass filter has the functions of detecting a high-pass rate in a wavelength band and a low-pass rate in a non-detection wavelength band, so that the filter filters a light beam in the non-detection wavelength band, thereby improving the detection accuracy. Here, the light inlet 2011 may be set to be a hollow portion with the same size as the filter 203, so that the filter 203 is just accommodated in the light inlet 2011. Alternatively, the filter 203 may be larger than the light inlet 2011, and then the filter 203 may be fixed to the cavity 201 by a screw connection, a snap connection, an adhesive, or the like, so that the filter 203 covers the light inlet 2011. In addition, the filter 203 may be a filter film, and the filter film is adhered to the cavity 201 such that the filter film covers the light incident port 2011.

Referring to fig. 2, in some embodiments, the light uniformizing apparatus 20 further includes a reflector 2022, the reflector 2022 is disposed in the cavity 201, a reflecting surface of the reflector 2022 faces the light incident port 2011, and the reflector 2022 is configured to reflect the diffuse transmission light directly emitted from the light incident port 2011 to the light exit port 2012. Through such an arrangement, the diffuse transmission light entering the cavity 201 through the light entrance port 2011 can be prevented from directly exiting through the light exit port 2012 and entering the light receiving device 30, the uniformity of the light beam received by the light receiving device 30 can be further improved, and therefore the detection accuracy and stability are improved.

Wherein, be fixed with the support on cavity 201, the fixed disk has been seted up to the tip of support, is equipped with the screw hole on the back of speculum 2022, through such setting, can fix speculum 2022 on the fixed disk, in addition, still can adjust the direction of speculum 2022 through the support, and then makes the direct light of different angles of speculum 2022 reflection, has improved the rate of utilization of speculum 2022.

In some specific examples, when the reflecting surface of the reflector 2022 does not cover the light exit port 2012, the position of the reflector 2022 is not limited, and only needs to be in the optical path direction of the direct light that is directly incident into the cavity 201 from the light entrance port 2011, and the installation manner of the reflector 2022 is not limited, and the reflector 2022 may be fixed in the cavity 201 by a bracket, or the reflector 2022 may be fixed in the cavity 201 by another connection manner.

In some embodiments, the reflector 2022 is a plane reflector or a spherical reflector, and the direct light is reflected by the plane reflector or the spherical reflector to the light reflector 202 in the cavity 201, so as to perform diffuse reflection in the cavity 201, wherein the structure of the reflector 2022 is not limited to only the plane reflector or the spherical reflector, but also can be an aspheric reflector.

In some specific examples, the reflective surface of the reflector 2022 may be a high diffuse reflective surface, and a uniform coating with high diffuse reflectance is disposed on the mirror surface, the material of the coating is barium sulfate paint, teflon paint, or nano paint with high reflectance, so that the first diffuse reflection can be realized by the direct light passing through the reflective surface of the reflector 2022, which has the same function as the diffuse reflective coating on the inner wall of the cavity 201, and the reflective surface of the reflector 2022 may be further plated with a metal film with high reflectance, such as an aluminum film, a gold film, a silver film, or the like; in addition, a novel reflective material such as silicon carbide may be provided on the mirror surface.

Referring to fig. 3, in some embodiments, the shape of the cavity 201 may be a sphere, a cone, an ellipse, or the like, wherein a uniform light field may be formed in the cavity 201 regardless of the shape of the cavity 201, and the light receiving device 30 may be mounted at any position on the cavity 201.

In some embodiments, the light receiving device 30 is configured to receive the light beam to be detected from the uniform light field formed by the light homogenizing device 20 through the light outlet 2012, wherein the light receiving device 30 includes an optical fiber, one end of the optical fiber is configured to receive the light beam to be detected from the uniform light field formed by the light homogenizing device 20 through the light outlet 2012, and the detecting device 40 is configured to receive the light beam to be detected from the other end of the optical fiber.

If the surface area of the optical fiber is smaller than the area of the light exit opening 2012, the optical fiber can be inserted into the light exit opening 2012 to receive the light beam, and then the light exit opening 2012 is covered with an opaque material similar to wood, marble, etc. to prevent the light beam from overflowing from the light exit opening 2012, if the surface area of the optical fiber is the same as the area of the light exit opening 2012, the optical fiber can be fixed on the light exit opening 2012 by clamping, adhering, etc. to receive the light beam, and if the surface area of the optical fiber is larger than the area of the light exit opening 2012, the optical fiber can be fixed on the cavity 201 by adhering, etc. and cover the light exit opening 2012 to receive the light beam.

In some specific examples, because the diffuse transmission light is reflected multiple times in the cavity 201 to form a uniform light field, one end of the optical fiber receiving light can be installed at any position of the cavity 201, and can receive an ideal light beam, so that the degree of freedom of optical fiber installation is increased, more system design schemes are improved, and the performance of optical fiber receiving is not affected.

In other embodiments, the light receiving device 30 may also be a device with light transmission capability, such as an optical waveguide.

In some embodiments, the detecting device 40 is configured to receive the light beam to be detected from the light receiving device 30 to analyze the wavelength of the light beam to be detected and obtain an average value, and specifically, the detecting device 40 may be a spectrometer, and the spectrometer is connected to an optical fiber, and the light beam to be detected is transmitted into the spectrometer through the optical fiber.

Specifically, the spectrometer comprises a monochromator, a sample container, a detector and a data processing system, wherein the monochromator is mainly used for decomposing the composite light into monochromatic light or a spectral band with a certain width, and the monochromator comprises an incident slit, an emergent slit, a collimating mirror, a dispersion element such as a prism or a grating and the like; the structural differences of the sample containers are large in different spectrometers, and even no special sample container is available in reflection spectrometers, in which the sample container is also called an absorption cell, which is generally made of a material that is optically transparent in the absorption spectrum. In the ultraviolet region, quartz material is adopted, in the visible region, silicate glass is used, in the infrared region, crystals of different materials can be selected according to different wavelength ranges to manufacture the window of the absorption cell; detectors are devices that convert one type of signal into another type of signal, such as a photocell in a spectrophotometer, which is an element that converts light energy into electrical energy; the data processing system mainly comprises a computer, a data communication component, instrument control and data processing software and the like, wherein usually, after the optical signal is converted into an electric signal by a detector, the electric signal is also processed by a certain signal processor, such as amplification, attenuation, integration, differentiation, addition, subtraction and the like of the electric signal; it can also be rectified to a direct current signal or converted to an alternating current signal, and the purpose of the processing is to convert the signal detected by the detector into a signal that can be read by a person, such as by a galvanometer, microampere digital display, computer display and recording of the result. At present, most of spectrum instruments perform data processing in a computer through special operating software, and can perform instrument operation, qualitative and quantitative analysis, record storage and the like.

In some other examples, a filter plus photodetector configuration may be used in place of the spectrometer.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A light homogenizing apparatus, comprising:

the cavity is provided with a light incidence port and a light emergence port;

the light reflection piece is arranged on the inner wall of the cavity and used for reflecting the light beam incident into the cavity through the light incident port in order to form an even light field.

2. The light-uniformizing apparatus as defined in claim 1, wherein the light reflecting member comprises: and the light reflection layer is arranged on the inner wall of the cavity.

3. The light homogenizing device of claim 2, wherein the light reflecting layer is a light diffusing reflecting layer.

4. The light-homogenizing device of claim 1, further comprising a filter disposed on the cavity and covering the light-incident port.

5. The light homogenizing device of claim 4, wherein the filter is a band pass filter.

6. The light uniformizing apparatus according to claim 1, further comprising a reflector disposed in the cavity, wherein a reflecting surface of the reflector faces the light incident port, and the reflector is configured to reflect the diffuse transmission light directly from the light incident port to the light exit port.

7. The light homogenizing device of claim 6, wherein the mirror is a flat mirror or a spherical mirror or an aspherical mirror.

8. The light homogenizing device of claim 1, wherein the cavity is spherical or conical or elliptical.

9. The utility model provides a fruit vegetables check out test set which characterized in that includes:

the light homogenizing device of any one of claims 1 to 8, wherein the light inlet is configured to receive the diffuse transmission light transmitted through the fruits and vegetables to be inspected;

10. The fruit and vegetable detection device of claim 9, wherein the light receiving device comprises an optical fiber, one end of the optical fiber is used for receiving the light beam to be detected from the uniform light field formed by the light homogenizing device through the light exit port, and the detection device is used for receiving the light beam to be detected from the other end of the optical fiber.