Double-beam spectrophotometer integrating sphere accessory

Abstract

The utility model relates to an integrating sphere accessory of a double-beam spectrophotometer, which comprises a fixed seat, an integrating sphere, a support and a detector, the integrating sphere is arranged on the fixed seat, the integrating sphere is of a cubic structure, and a spherical cavity is arranged in the integrating sphere; the integrating sphere is provided with a first light inlet hole, a second light inlet hole, a first sample hole, a second sample hole and a receiving hole which are communicated with the spherical cavity and the outside, and the first light inlet hole, the second light inlet hole, the first sample hole and the second sample hole are located in the four side faces of the integrating sphere of the cubic structure respectively. The first light inlet hole and the first sample hole are positioned on one group of opposite side surfaces of the integrating sphere, the second light inlet hole and the second sample hole are positioned on the other group of opposite side surfaces of the integrating sphere, and the receiving hole is positioned on the bottom surface of the integrating sphere. The number of the supports is four, the four supports are located on the outer sides of the four side faces of the integrating sphere respectively, and the supports are used for pressing a sample or a white board on the side faces of the integrating sphere so as to fix the sample and the standard white board. And the detector is positioned below the integrating sphere and is opposite to the receiving hole.

Description

Technical Field

[0001] This utility model relates to the field of optical testing technology, and more specifically, to an integrating sphere accessory for a dual-beam spectrophotometer. Background Technology

[0002] An integrating sphere spectrophotometer is an instrument that analyzes samples by utilizing the absorption or transmission characteristics of light. The integrating sphere, the core component of the spectrophotometer, is a hollow sphere with its inner wall coated with a white diffuse reflective material. Its wall has a through-hole for light inlet, a sample inlet, and a receiving inlet. One detection process involves the light beam entering the integrating sphere through the light inlet, then passing through the sample inlet and illuminating the sample or a standard white plate that is blocked outside the sample inlet. The reflected light beam undergoes multiple reflections and scatterings by the inner wall coating before finally converging onto the detector through the receiving inlet. Finally, by comparing the detection results of the light beam illuminating the sample and the standard white plate, the characteristics of the sample are analyzed.

[0003] In the existing technology, a support is set outside the integrating sphere, and the sample and standard white board are fixed on the support by clamping or locking with bolts to ensure the smooth progress of the test. However, under long-term use or vibration environment, such fixing method may cause the sample or standard white board to loosen or shift, thereby affecting the stability of the test. Utility Model Content

[0004] The purpose of this invention is to provide an integrating sphere accessory for a dual-beam spectrophotometer, which solves the technical problem of reducing the loosening or displacement of the sample and standard white plate to improve the stability of the detection.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0006] This utility model provides an integrating sphere accessory for a dual-beam spectrophotometer, comprising: a fixed base; an integrating sphere disposed on the fixed base, the integrating sphere having a cubic structure with a spherical cavity inside, the integrating sphere having a first light inlet, a second light inlet, a first sample hole, a second sample hole, and a receiving hole communicating with the spherical cavity and the outside, the first light inlet, the second light inlet, the first sample hole and the second sample hole being located on the four sides of the integrating sphere respectively, the first light inlet and the first sample hole being located on one set of opposite sides of the integrating sphere, the second light inlet and the second sample hole being located on another set of opposite sides of the integrating sphere, and the receiving hole being located on the bottom surface of the integrating sphere; four supports, the four supports being located on the outer sides of the four sides of the integrating sphere respectively, the supports being used to press samples or white boards against the sides of the integrating sphere to fix the samples and standard white boards; and a detector located below the integrating sphere and opposite to the receiving hole.

[0007] In some embodiments of this application, the support includes a base, a pressure plate, and an elastic element. The base is disposed on the fixed seat, and the pressure plate is rotatably disposed on the base. The pressure plate rotates to increase or decrease the gap between itself and the side of the integrating sphere, the gap being for inserting a sample or a standard whiteboard. The elastic element provides an elastic force acting on the pressure plate. When fixing a sample or a standard whiteboard, the elastic element elastically drives the pressure plate to press the sample or standard whiteboard firmly against the side of the integrating sphere.

[0008] In some embodiments of this application, the bracket further includes a fixed shaft and a rotating seat. The fixed shaft is disposed on the base, and the rotating seat is provided with the pressure plate. The rotating seat has a shaft hole and is rotatably disposed on the fixed shaft through the shaft hole, so that the pressure plate is rotatably disposed on the base. The rotating seat is provided with a mounting groove, and the base is provided with a fixing groove. The elastic element includes a plurality of torsion springs, each of which is sequentially sleeved on the fixed shaft along the axial direction, and both ends of the torsion spring are respectively installed in the mounting groove and the fixing groove.

[0009] In some embodiments of this application, the pressure plate includes a connecting plate and a fixing plate connected in an L-shape. The connecting plate is connected to a rotating seat, and the fixing plate is arranged in an arc shape, with its middle section protruding towards the side of the integrating sphere. The middle section of the fixing plate is provided with a protrusion, which is used to press a standard white board or sample onto the side of the integrating sphere.

[0010] In some embodiments of this application, a limiting plate is provided on the side of the integrating sphere, which is used to support the bottom of the sample or the standard whiteboard when fixing the sample or the standard whiteboard.

[0011] In some embodiments of this application, the integrating sphere includes a shell and an integrating sphere body. The shell is a detachable box structure with a spherical fixing cavity inside. The integrating sphere body is spherical and embedded in the spherical fixing cavity, and the spherical cavity is located within the integrating sphere body. The first light inlet includes a first light inlet main hole and a first light inlet sub-hole that are connected to each other. The second light inlet includes a second light inlet main hole and a second light inlet sub-hole that are connected to each other. The first sample hole includes a first sample main hole and a first sample sub-hole that are connected to each other. The second sample hole includes a second sample main hole and a second sample sub-hole that are connected to each other. The receiving hole includes a receiving main hole and a receiving sub-hole that are connected to each other. The first light inlet main hole, the second light inlet main hole, the first sample main hole, the second sample main hole, and the receiving main hole are all opened on the integrating sphere body and are all connected to the spherical cavity. The first light inlet sub-hole, the second light inlet sub-hole, the first sample sub-hole, and the second sample sub-hole are respectively opened on the four side walls of the shell and are all connected to the outside. The receiving sub-hole is opened on the bottom wall of the shell and is connected to the outside.

[0012] In some embodiments of this application, the mounting base includes a frame and a top plate supported on the frame. The top plate has a clearance opening. The housing is supported on the top plate, and the receiving sub-hole is exposed through the clearance opening and opposite to the detector. The detector is located inside the mounting base.

[0013] In some embodiments of this application, the housing includes an upper housing, a lower housing, and fasteners. Both the upper and lower housings have hemispherical cavities. The upper housing has a first semi-hole on each of its four sides, and the lower housing has a second semi-hole on each of its four sides. The upper and lower housings are stacked vertically and connected sequentially by fasteners. The hemispherical cavities of the upper and lower housings together form a spherical fixing cavity for accommodating the integrating sphere body. The first semi-holes on the four sides of the upper housing are respectively joined with the second semi-holes on the four sides of the lower housing to form a first photon inlet aperture, a second photon inlet aperture, a first sample sub-aperture, and a second sample sub-aperture. The receiving sub-aperture is located at the bottom of the lower housing.

[0014] In some embodiments of this application, the upper housing is provided with an upper connecting hole that runs vertically through the upper housing, the lower housing is provided with a lower connecting hole that runs vertically through the lower housing, the fixing seat is provided with a screw hole, and the fastener includes a rod portion and a cap portion connected to each other. The rod portion has threads, and the rod portion of the fastener passes through the upper connecting hole and the lower connecting hole in sequence and is screwed into the screw hole to lock it on the fixing seat. The cap portion is used to prevent the upper housing from coming off the rod portion upwards.

[0015] In some embodiments of this application, the dual-beam spectrophotometer integrating sphere accessory further includes an aperture and a lens mount disposed on the fixed base. The lens mount is provided with a reflector, which is used to reflect the light beam passing through the aperture to the first light entrance aperture.

[0016] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:

[0017] In the integrating sphere accessory of the dual-beam spectrophotometer of this utility model embodiment, one beam of the dual beams enters the spherical cavity through the first light-entry hole of the housing, and the other beam of the dual beams enters the spherical cavity through the second light-entry hole. Since the first light-entry hole and the first sample hole are arranged opposite each other, and the second light-entry hole and the second sample hole are arranged opposite each other, the independence of the dual beam paths can be ensured. This design conforms to the core principle of the dual-beam spectrophotometer. The relative arrangement of the receiving hole and the detector ensures that the dual beams can be collected by the detector after uniform diffuse reflection from the inner wall of the integrating sphere. Four supports correspond to the four sides of the integrating sphere. Specifically, by selectively fixing samples or standard white plates on each support and blocking the holes on their corresponding sides, different detection modes can be flexibly switched, thus adapting to different detection needs. The integrating sphere has a cubic structure with flat sides. When the support presses the sample or white board against the side of the integrating sphere, the large contact area between the sample, standard white board and the integrating sphere, along with the clamping action between the side of the integrating sphere and the support, provides stable and reliable fixation of the sample and standard white board, reducing positional loosening or displacement, thereby improving the stability of the detection. Attached Figure Description

[0018] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0019] Figure 1 This is a schematic diagram of the structure of an integrating sphere accessory for a dual-beam spectrophotometer according to an exemplary embodiment.

[0020] Figure 2 yes Figure 1 A structural diagram from another perspective.

[0021] Figure 3 yes Figure 1 A schematic diagram of the integral sphere.

[0022] Figure 4 yes Figure 1 A schematic diagram of its decomposed structure.

[0023] Figure 5 yes Figure 2 A schematic diagram of the support structure.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Mounting base; 11. Frame; 12. Top plate; 13. Clearance opening; 14. Screw hole;

[0026] 2. Integrating sphere; 21. Housing; 211. Upper housing; 2111. Upper connecting hole; 212. Lower housing; 2121. Lower connecting hole; 213. Limiting plate; 22. Integrating sphere body; 221. Spherical cavity; 23. First light inlet hole; 231. First light inlet main hole; 232. First photon inlet sub-hole; 24. Second light inlet hole; 241. Second light inlet main hole; 242. Second photon inlet sub-hole; 25. First sample hole; 251. First sample main hole; 252. First sample sub-hole; 26. Second sample hole; 261. Second sample main hole; 262. Second sample sub-hole; 27. Receiving hole;

[0027] 3. Bracket; 31. Base; 32. Pressure plate; 321. Connecting plate; 322. Fixing plate; 3221. Middle section; 3222. Protrusion; 33. Elastic element; 331. Torsion spring; 34. Fixed shaft; 35. Rotating seat;

[0028] 4. Light bar;

[0029] 5. Lens mount.

[0030] 6. Standard whiteboard. Detailed Implementation

[0031] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail herein. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein. Thus, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that many features are described in this specification. While certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0032] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0033] Please see Figures 1 to 3 The dual-beam spectrophotometer integrating sphere 2 accessory provided in one embodiment of the present invention mainly includes a fixed base 1, an integrating sphere 2, a bracket 3, and a detector. The integrating sphere 2 is disposed on the fixed base 1 and has a cubic structure. It has a spherical cavity 221 inside. The integrating sphere 2 has a first light inlet 23, a second light inlet 24, a first sample hole 25, a second sample hole 26, and a receiving hole 27 that connect the spherical cavity 221 and the outside. The first light inlet 23, the second light inlet 24, the first sample hole 25, and the second sample hole 26 are respectively located on the four sides of the cubic integrating sphere 2. The first light inlet 23 and the first sample hole 25 are located on a set of opposite sides of the integrating sphere 2, and the second light inlet 24 and the second sample hole 26 are located on another set of opposite sides of the integrating sphere 2. The receiving hole 27 is located on the bottom surface of the integrating sphere 2. Four supports 3 are provided, located on the outer sides of the four sides of the integrating sphere 2. The supports 3 are used to press the sample or white board against the sides of the integrating sphere 2 to fix the sample and standard white board 6. The detector is located below the integrating sphere 2 and is positioned opposite to the receiving hole 27.

[0034] In the integrating sphere 2 accessory of the dual-beam spectrophotometer of this embodiment, one beam of the dual beams enters the spherical cavity 221 through the first light inlet 23 of the housing 21, and the other beam of the dual beams enters the spherical cavity 221 through the second light inlet 24. Since the first light inlet 23 and the first sample hole 25 are located on opposite sides, and the second light inlet 24 and the second sample hole 26 are also located on opposite sides, the independence of the dual beam paths can be ensured. This design conforms to the core principle of the dual-beam spectrophotometer. The relative arrangement of the receiving hole 27 and the detector ensures that the dual beams can be collected by the detector after uniform diffuse reflection through the inner wall of the integrating sphere 2. The four supports 3 correspond to the four sides of the integrating sphere 2. Specifically, by selectively fixing samples or standard white plates 6 on each support 3 and blocking the holes on their corresponding sides, different detection modes can be flexibly switched to adapt to different detection needs. The integrating sphere 2 has a cubic structure with flat sides. When the support 3 presses the sample or white board against the side of the integrating sphere 2, the large contact area between the sample, the standard white board 6 and the integrating sphere 2, and the clamping action formed between the side of the integrating sphere 2 and the support 3 can stably and reliably fix the sample and the standard white board 6, reduce positional loosening or displacement, and thus improve the stability of the detection.

[0035] It should be noted that, Figure 2 The diagram shows two supports 3 pressing a standard white plate 6 against two adjacent sides of the integrating sphere 2, each with a first sample hole 25 and a second sample hole 26. The standard white plates 6 on the two supports 3 respectively block the first sample hole 25 and the second sample hole 26. Correspondingly, either both supports 3 press the sample against the two adjacent sides of the integrating sphere 2 with the first sample hole 25 and the second sample hole 26, or both supports 3 press the sample and the standard white plate 6 against the two adjacent sides of the integrating sphere 2 with the first sample hole 25 and the second sample hole 26 respectively.

[0036] Specifically, in a detection scenario where the first sample aperture 25 and the second sample aperture 26 are blocked by the sample and the standard white plate 6 respectively, the first light inlet aperture 23 and the second light inlet aperture 24 can respectively pass through the reference light and the sample light from the same light source, thereby completing the sample detection under a single light source through the integrating sphere 2 accessory of the dual-beam spectrophotometer.

[0037] Specifically, reference light from different light sources is introduced into the first light-entry hole 23 and the second light-entry hole 24 respectively. At this time, the first sample hole 25 and the second sample hole 26 are both blocked by the standard white plate 6. Then, sample light from different light sources is introduced into the first light-entry hole 23 and the second light-entry hole 24 respectively. At this time, the first sample hole 25 and the second sample hole 26 are both blocked by the standard white plate 6. Thus, sample detection under two light sources is completed through two detections.

[0038] Please see Figure 3 and Figure 5 In a specific embodiment, the support 3 includes a base 31, a pressure plate 32, and an elastic element 33. The base 31 is mounted on the fixed base 1, and the pressure plate 32 is rotatably mounted on the base 31. The pressure plate 32 rotates to increase or decrease the gap between itself and the side of the integrating sphere 2, allowing for the placement of a sample or standard white board 6. The elastic element 33 provides an elastic force acting on the pressure plate 32. When fixing the sample or standard white board 6, the elastic element 33 elastically drives the pressure plate 32 to press the sample or standard white board 6 firmly against the side of the integrating sphere 2.

[0039] When installing the standard whiteboard 6 or sample, force is applied to the pressure plate 32, causing the pressure plate 32 to rotate relative to the base 31 and gradually increase the gap between the pressure plate 32 and the side wall of the housing 21. Then, the standard whiteboard 6 or sample is placed into the gap. After it is in place, the pressure plate 32 is gradually released. Driven by the elastic force of the elastic element 33, the pressure plate 32 rotates and reduces the gap between itself and the side of the integrating sphere 2, pressing the standard whiteboard 6 or sample tightly against the side, thus completing the fixation of the standard whiteboard 6 or sample. The operation is relatively quick, convenient and labor-saving. The setting of the elastic element 33 also plays a shockproof role, further improving the stability of the fixation. Moreover, the bracket 3 can adapt to the fixation needs of standard whiteboards 6 and samples of different thicknesses, and has a certain degree of versatility.

[0040] It should be noted that the sample and standard white board 6 are not fixed on the bracket 3. The pressure plate 32 is in the initial state under the drive of the elastic element 33 and is opposite to the side of the integrating ball 2. The pressure plate 32 is provided with a relief groove that is opposite to the hole on the side of the integrating ball 2. The relief groove is used to ensure that the hole is not blocked in the non-fixed state.

[0041] In a further embodiment, the bracket 3 further includes a fixed shaft 34 and a rotating seat 35. The fixed shaft 34 is mounted on the base 31, and the rotating seat 35 is provided with a pressure plate 32. The rotating seat 35 has a shaft hole and is rotatably mounted on the fixed shaft 34 through the shaft hole, so that the pressure plate 32 is rotatably mounted on the base 31. The rotating seat 35 is provided with a mounting groove, and the base 31 is provided with a fixing groove. The elastic element 33 includes a plurality of torsion springs 331, each torsion spring 331 being sequentially sleeved on the fixed shaft 34 along the axial direction, and the two ends of the torsion springs 331 are respectively installed in the mounting groove and the fixing groove. The rotating seat 35 is rotatably mounted on the fixed shaft 34 through the shaft hole, so that the pressure plate 32 can rotate relative to the base 31. The two ends of the torsion spring 331 are respectively fixed in the mounting groove of the rotating seat 35 and the fixing groove of the base 31. When the rotating seat 35 drives the pressure plate 32 on it to rotate to increase the interval, the torsion spring 331 is compressed and generates elastic force. Several torsion springs 331 are sequentially sleeved on the fixed shaft 34 along the axial direction, so that the elastic force is evenly applied to the rotating seat 35 and the pressure plate 32 on it, thereby improving the overall structural stability of the bracket 3. The bracket 3 has the characteristic of rapid adjustment and can provide a stable and reliable fixing force.

[0042] In a specific embodiment, the pressure plate 32 includes a connecting plate 321 and a fixing plate 322 connected in an L-shape. The connecting plate 321 is connected to the rotating seat 35. The fixing plate 322 is arranged in an arc shape, and its middle section 3221 protrudes towards the side of the integrating sphere 2. The middle section 3221 of the fixing plate 322 is provided with a protrusion 3222, which is used to press the standard white plate 6 or the sample firmly onto the side of the integrating sphere 2. The pressing force is concentrated on the protrusion 3222 of the middle section 3221 of the fixing plate 322 and acts on the standard white plate 6 or the sample, thereby ensuring that the standard white plate 6 or the sample can be firmly fixed onto the side of the integrating sphere 2 and preventing displacement or loosening during the detection process.

[0043] It can be imagined that one end of the fixed plate 322 is connected to the connecting plate 321, and the other end is a free end. The fixed plate 322 has an arc-shaped structure with the middle section 3221 protruding, which can be used for actions acting on the free end and can easily drive the pressure plate 32 to rotate, thereby improving the convenience of operation.

[0044] Please see Figure 1 , Figure 2 and Figure 4 In a specific embodiment, a limiting plate 213 is provided on the side of the integrating sphere 2. When fixing the sample or standard white board 6, the limiting plate 213 is used to support the bottom of the sample or standard white board 6. The pressure plate 32 and the side of the integrating sphere 2 are used to provide horizontal clamping, and the limiting plate 213 is used to provide upward support, which can further prevent positional displacement and loosening.

[0045] Please see Figure 3 and Figure 4In a specific embodiment, the integrating sphere 2 includes a housing 21 and an integrating sphere body 22. The housing 21 is a detachable box structure with a spherical fixing cavity inside. The integrating sphere body 22 is spherical and embedded in the spherical fixing cavity, with a spherical cavity 221 disposed within the integrating sphere body 22. The first light inlet 23 includes a first light inlet main hole 231 and a first light inlet sub-hole 232 that are connected. The second light inlet 24 includes a second light inlet main hole 241 and a second light inlet sub-hole 242 that are connected. The first sample hole 25 includes a first sample main hole 251 and a first sample sub-hole 252 that are connected. The second sample hole 26 includes a second sample main hole 261 and a second sample sub-hole 262 that are connected. The receiving hole 27 includes a receiving main hole and a receiving sub-hole that are connected. The first light-entry aperture 231, the second light-entry aperture 241, the first sample aperture 251, the second sample aperture 261, and the receiving aperture are all located on the integrating sphere body 22 and are all connected to the spherical cavity 221. The first light-entry sub-aperture 232, the second light-entry sub-aperture 242, the first sample sub-aperture 252, and the second sample sub-aperture 262 are respectively located on the four side walls of the housing 21 and are all connected to the outside. The receiving sub-aperture is located on the bottom wall of the housing 21 and is connected to the outside.

[0046] The housing 21 reduces damage to the integrating sphere 22 caused by external environment and collisions. The housing 21 features a detachable box structure, facilitating maintenance, cleaning, or replacement of the integrating sphere 22 without requiring the complete replacement of the integrating sphere 2, thus simplifying maintenance procedures and reducing costs. The housing 21 has corresponding sub-holes communicating with the main holes on the integrating sphere 2, ensuring that while providing external protection for the integrating sphere 2, the housing 21 does not affect the transmission of the dual beams inside and outside the integrating sphere 2.

[0047] Please see Figure 1 , Figure 2 and Figure 4 In a specific embodiment, the mounting base 1 includes a frame 11 and a top plate 12 supported on the frame 11. The top plate 12 has a clearance opening 13. The housing 21 is supported on the top plate 12, and the receiving sub-hole is exposed through the clearance opening 13 and faces the detector. The detector is located inside the mounting base 1. The frame 11, top plate 12, clearance opening 13, and detector work together to make the overall structure more compact.

[0048] Please see Figure 3 and Figure 4In a specific embodiment, the housing 21 includes an upper housing 211, a lower housing 212, and fasteners. Both the upper housing 211 and the lower housing 212 have hemispherical cavities. The upper housing 211 has a first semi-hole on each of its four sides, and the lower housing 212 has a second semi-hole on each of its four sides. The upper housing 211 and the lower housing 212 are stacked vertically and connected sequentially by fasteners. The hemispherical cavities of the upper housing 211 and the lower housing 212 together form a spherical fixing cavity for accommodating the integrating sphere body 22. The first semi-holes on the four sides of the upper housing 211 respectively combine with the second semi-holes on the four sides of the lower housing 212 to form a first photon inlet 232, a second photon inlet 242, a first sample sub-hole 252, and a second sample sub-hole 262. The receiving sub-hole is located at the bottom of the lower housing 212. The upper housing 211 and the lower housing 212 are fixedly connected by fasteners, allowing for easy disassembly and assembly, facilitating the removal of the integrating sphere body 22.

[0049] Please see Figure 4 In a specific embodiment, the upper housing 211 has a through upper connecting hole 2111, and the lower housing 212 has a through lower connecting hole 2121. The fixing base 1 has a screw hole 14. The fastener includes a connected rod and a cap. The rod is threaded. The rod of the fastener passes through the upper connecting hole 2111 and the lower connecting hole 2121 in sequence and is screwed into the screw hole 14 to lock it onto the fixing base 1. The cap is used to prevent the upper housing 211 from coming off the rod upward. Through the cooperation between the upper housing 211, the lower housing 212, the fastener, and the fixing plate 322, a stable connection is achieved between the upper housing 211, the lower housing 212, and the fixing plate 322, which has the advantages of convenient operation and reliable connection. In other embodiments, the fixing plate 322 has a mounting hole, and the fastener has a threaded pair structure. The bolt passes through the upper connecting hole 2111, the lower connecting hole 2121, and the mounting hole in sequence and is locked by a nut.

[0050] Please see Figure 1 and Figure 2 In a specific embodiment, the integrating sphere 2 accessory of the dual-beam spectrophotometer further includes an aperture 4 and a lens mount 5 mounted on the fixed base 1. The lens mount 5 is equipped with a reflector, which reflects the light beam passing through the aperture 4 to the first light entrance aperture 23. The aperture 4 controls the direction and range of the light beam's entry, ensuring the beam enters at a specific angle and range, improving the collimation and directionality of the beam, and reducing beam scattering and loss. Through the combined use of the aperture 4 and the reflector, the entry and reflection paths of the beam are optimized. This reduces interference and loss in the optical path, ensuring the accuracy and reliability of the detection results.

[0051] It is conceivable that a matching aperture 4 and a reflector mount are also provided outside the second light inlet 24, which will not be elaborated on here.

[0052] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An integrating sphere accessory for a dual-beam spectrophotometer, characterized in that, include: Fixed base; An integrating sphere is mounted on the fixed base. The integrating sphere has a cubic structure with a spherical cavity inside. The integrating sphere has a first light inlet, a second light inlet, a first sample hole, a second sample hole, and a receiving hole that connect the spherical cavity to the outside. The first light inlet, the second light inlet, the first sample hole, and the second sample hole are located on the four sides of the integrating sphere, and the first light inlet and the first sample hole are located on a set of opposite sides of the integrating sphere. The second light inlet and the second sample hole are located on another set of opposite sides of the integrating sphere. The receiving hole is located on the bottom surface of the integrating sphere. The support is provided in four parts, which are respectively located on the outer sides of the four sides of the integrating sphere. The support is used to press the sample or whiteboard against the sides of the integrating sphere to fix the sample and the standard whiteboard. The detector is located below the integrating sphere and is positioned opposite the receiving aperture.

2. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 1, characterized in that, The support includes a base, a pressure plate, and an elastic element. The base is disposed on the fixed seat, and the pressure plate is rotatably disposed on the base. The pressure plate rotates to increase or decrease the gap between itself and the side of the integrating sphere. The gap can accommodate a sample or a standard white board. The elastic element is used to provide an elastic force acting on the pressure plate. When fixing a sample or standard whiteboard, the elastic element elastically drives the pressure plate to press the sample or standard whiteboard firmly against the side of the integrating sphere.

3. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 2, characterized in that, The bracket further includes a fixed shaft and a rotating seat. The fixed shaft is disposed on the base, and the rotating seat is provided with the pressure plate. The rotating seat is provided with a shaft hole and is rotatably disposed on the fixed shaft through the shaft hole, so that the pressure plate is rotatably disposed on the base. The rotating seat is provided with an installation groove, and the base is provided with a fixing groove; The elastic element includes several torsion springs, each of which is sequentially sleeved on the fixed shaft along the axial direction, and both ends of the torsion springs are respectively installed in the mounting groove and the fixing groove.

4. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 3, characterized in that, The pressure plate includes a connecting plate and a fixing plate connected in an L-shape. The connecting plate is connected to the rotating seat. The fixing plate is arranged in an arc shape, and its middle section protrudes towards the side of the integrating sphere. The middle section of the fixing plate is provided with a protrusion, which is used to press the standard white board or sample onto the side of the integrating sphere.

5. The integrating sphere accessory for a dual-beam spectrophotometer according to any one of claims 1-4, characterized in that, A limiting plate is provided on the side of the integrating sphere. When fixing the sample or the standard whiteboard, the limiting plate is used to support the bottom of the sample or the standard whiteboard.

6. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 1, characterized in that, The integrating sphere includes a shell and an integrating sphere body. The shell is a detachable box structure with a spherical fixing cavity inside. The integrating sphere body is spherical and is embedded in the spherical fixing cavity. The spherical cavity is located inside the integrating sphere body. The first light inlet includes a first light inlet main hole and a first light inlet sub-hole that are connected to each other; the second light inlet includes a second light inlet main hole and a second light inlet sub-hole that are connected to each other; the first sample hole includes a first sample main hole and a first sample sub-hole that are connected to each other; the second sample hole includes a second sample main hole and a second sample sub-hole that are connected to each other; and the receiving hole includes a receiving main hole and a receiving sub-hole that are connected to each other. The first light-entry aperture, the second light-entry aperture, the first sample aperture, the second sample aperture, and the receiving aperture are all opened on the integrating sphere body and are all connected to the spherical cavity. The first photon aperture, the second photon aperture, the first sample aperture, and the second sample aperture are respectively opened on the four side walls of the housing and are all connected to the outside. The receiving aperture is opened on the bottom wall of the housing and is connected to the outside.

7. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 6, characterized in that, The mounting base includes a frame and a top plate supported on the frame. The top plate has a clearance opening. The housing is supported on the top plate, and the receiving sub-hole is exposed through the clearance opening and opposite to the detector. The detector is located inside the mounting base.

8. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 6, characterized in that, The housing includes an upper housing, a lower housing, and fasteners. Both the upper housing and the lower housing have hemispherical cavities. The upper housing has a first half-hole on each of its four sides, and the lower housing has a second half-hole on each of its four sides. The upper shell and the lower shell are stacked one on top of the other and connected in sequence by fasteners. The hemispherical cavity of the upper shell and the hemispherical cavity of the lower shell enclose a spherical fixing cavity for accommodating the integrating sphere body. The first half-holes on the four sides of the upper housing are respectively joined with the second half-holes on the four sides of the lower housing to form the first photon inlet hole, the second photon inlet hole, the first sample sub-hole, and the second sample sub-hole. The receiving sub-hole is located at the bottom of the lower housing.

9. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 8, characterized in that, The upper housing has an upper connecting hole that runs vertically through the upper and lower housings, and the lower housing has a lower connecting hole that runs vertically through the lower and upper housings. The fixing seat has a screw hole. The fastener includes a rod and a cap that are connected to each other. The rod has a thread. The rod of the fastener passes through the upper connecting hole and the lower connecting hole in sequence and is screwed into the screw hole to lock it on the fixing seat. The cap is used to prevent the upper housing from coming off the rod upward.

10. The integrating sphere accessory for a dual-beam spectrophotometer according to claim 1, characterized in that, It also includes an aperture and a lens mount disposed on the fixed base, the lens mount being provided with a reflector, the reflector being used to reflect the light beam passing through the aperture to the first light inlet.

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