A fixing assembly for mounting a lens measuring instrument and a measuring instrument

Abstract

The present application relates to high-precision optical detection technical field, specifically, it relates to a kind of for installing lens measuring instrument fixed assembly and measuring instrument, comprising: rooting block, for being connected to lens back by adhesive mode;Base is connected with the rooting block by fastening assembly, the base is equipped with at least three first contact with the back of the lens opposite, and at least two second contact with the side of the lens opposite, the fastening assembly is configured as it can generate first elastic force along first direction to the base, and second elastic force along second direction.The present application utilizes rooting block and lens back adhesive, avoids looking for mechanical attachment point in fragile optical surface;At the same time, since base is elastically connected with rooting block by fastening assembly, rather than rigidly fixed directly, and base is elastically abutted to the back and side of lens respectively by first contact and second contact, the self-adapting accurate positioning of base with mirror surface itself as reference is realized.

Description

Technical Field

[0001] This invention relates to the field of high-precision optical inspection technology, and more specifically, to a fixing component and a measuring instrument for mounting a lens measuring instrument. Background Technology

[0002] In the reflector systems of astronomical telescopes, a reflective array structure composed of multiple sub-mirrors is often used to obtain greater light throughput and higher angular resolution. This structure requires each sub-mirror to meet certain spatial positional requirements during assembly and operation to ensure the optical co-phase characteristics of the entire reflector. Therefore, high-precision displacement sensors need to be deployed between adjacent sub-mirrors to detect their relative positions in real time, serving as the basis for subsequent active optics system calibration. However, this sensor faces two key technical challenges in practical applications: First, sub-mirrors are usually made of high surface quality materials such as optical glass, with smooth surfaces and high sensitivity to contact measurements. Traditional sensors struggle to find stable and reliable mechanical attachment or contact points at the mirror edge areas, and must avoid damaging or contaminating the optical surface. Second, to achieve sub-nanometer-level optical co-phase accuracy, the sensor must possess extremely high measurement resolution and stability, which places extremely stringent rigidity requirements on the sensor and its mounting structure. If the rigidity of the fixed material is insufficient, factors such as environmental micro-vibration, temperature change, or gravity release can cause micro-drift of the sensor reference position, which in turn leads to non-consistent drift of the measurement results, seriously affecting the accuracy and reliability of co-phase control. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a fixing component for mounting a lens measuring instrument and a measuring instrument that can improve the measurement accuracy of the measuring instrument.

[0004] To achieve the above and other related objectives, the present invention provides a fixing assembly for mounting a lens measuring instrument, comprising:

[0005] Rooting blocks are used to attach to the back of lenses using adhesive.

[0006] The base is connected to the rooting block by a fastening assembly. The base has at least three first contact points opposite to the back of the lens and at least two second contact points opposite to the side of the lens. The fastening assembly is configured to generate a first elastic force in a first direction and a second elastic force in a second direction on the base. The first elastic force causes the first contact points to press against the back of the lens, and the second elastic force causes the second contact points to press against the side of the lens.

[0007] The base and / or the rooting block are provided with a mounting part for mounting measuring instruments and limiting the relative position of the measuring instruments and the lens.

[0008] In an optional embodiment of the present invention, the fastening assembly includes a screw, a first nut, a first elastic element, and a second elastic element; the screw is mounted on the rooting block, and a limiting portion for preventing the screw from moving away from the lens is provided between the screw and the rooting block; the first nut is threadedly connected to the screw, and the first nut has a first pressing surface and a second pressing surface distributed in a stepped manner facing the back of the lens; the first elastic element is disposed between the first pressing surface and the rooting block, and the second elastic element is disposed between the second pressing surface and the base, and the second elastic element is used to apply the first elastic force to the base.

[0009] In an optional embodiment of the present invention, the first elastic element includes an arched portion and a translational portion. The arched portion is located between the first pressing surface and the rooting block. One end of the arched portion near the second contact point is fixedly connected to the rooting block, and the other end of the arched portion away from the second contact point is connected to the translational portion. The translational portion is slidably connected to the rooting block along the second direction. A lateral elastic deformation unit is connected to the other end of the translational portion away from the arched portion. The lateral elastic deformation unit is disposed opposite to a baffle wall disposed on the base along the second direction. The first elastic element is configured such that when the arched portion is compressed and deformed by the first nut, the translational portion can drive the lateral elastic deformation unit to press against the baffle wall along the second direction. The lateral elastic deformation unit is used to apply the second elastic force to the base.

[0010] In an optional embodiment of the present invention, the rooting block has a waist-shaped hole on the side away from the lens, and the screw has a T-shaped head that matches the contour of the waist-shaped hole at the end near the lens. The waist-shaped hole has a cavity for the T-shaped head to rotate at the end near the lens. A locking groove that matches the contour of the T-shaped head is provided on the cavity wall on the side away from the lens. The locking groove is set at a certain angle with the waist-shaped hole, and the locking groove and the T-shaped head form the limiting part.

[0011] In an optional embodiment of the present invention, the end of the T-head opposite to the locking groove is provided with two protrusions, and the two protrusions are symmetrically arranged on both sides of the screw.

[0012] In an optional embodiment of the present invention, the end of the rooting block that contacts the lens is provided with an overflow groove, and the overflow groove is distributed at least along the circumferential and / or radial direction of the rooting block.

[0013] In an optional embodiment of the present invention, the sidewall of the rooting block is provided with at least one plane.

[0014] In an optional embodiment of the present invention, at least three fourth contacts are provided on the side of the base opposite to the lens, and each of the first contacts and each of the fourth contacts are aligned one-to-one along the first direction; the screw and the fourth contacts constitute the mounting part.

[0015] In an optional embodiment of the invention, the rooting block and the base are made of quartz glass.

[0016] To achieve the above and other related objectives, the present invention also provides a measuring instrument, including a sensing element and a target object to be measured, wherein the sensing element and the target object to be measured are respectively mounted on the back of two adjacent lenses by a fixing assembly.

[0017] The technical advantages of this invention are as follows: This invention utilizes a rooting block bonded to the back of the lens, avoiding the need to find mechanical attachment points on fragile optical surfaces; simultaneously, because the base is elastically connected to the rooting block via a fastening assembly rather than rigidly fixed, and the base elastically abuts against the back and side of the lens via the first and second contacts respectively, adaptive and precise positioning of the base with the lens surface as a reference is achieved; the excellent dimensional stability of quartz glass allows the entire measurement link to maintain synchronous micro-deformation with the optical glass lens when facing temperature changes, greatly suppressing relative displacement caused by thermal mismatch; at the same time, its high rigidity effectively resists structural deformation caused by environmental micro-vibrations and gravity release, ensuring the contact stability of each contact system. Attached Figure Description

[0018] Figure 1 This is a perspective view of the usage status of the glass substrate-based precision dimension sensing measuring instrument provided in the embodiments of the present invention;

[0019] Figure 2 yes Figure 1 A magnified view of part of the I;

[0020] Figure 3 This is a schematic diagram of the assembly structure of the target carrier and the fixing component provided in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the assembly structure of the sensor carrier and fixing components provided in an embodiment of the present invention;

[0022] Figure 5 This is a perspective view of the usage status of the glass substrate-based precision dimension sensing measuring instrument provided in the embodiments of the present invention;

[0023] Figure 6 yes Figure 5 AA section view;

[0024] Figure 7yes Figure 6 Partial magnified view of section II;

[0025] Figure 8 yes Figure 7 BB section view;

[0026] Figure 9 This is an exploded view of the target carrier and fixing components provided in an embodiment of the present invention;

[0027] Figure 10 This is an exploded view of the target carrier and fixing components provided in an embodiment of the present invention;

[0028] Figure 11 This is an exploded view of the rooting block and screw provided in an embodiment of the present invention;

[0029] Figure 12 This is a perspective view of the rooting block provided in an embodiment of the present invention;

[0030] Explanation of reference numerals in the attached drawings: 100, lens; 10, target carrier; 101, second pad; 11, target object; 12, third contact; 20, sensor carrier; 21, sensing element; 30, fixing assembly; 301, first pad; 31, rooting block; 311, oblong hole; 312, cavity; 313, locking groove; 314, plane; 315, overflow groove; 32, base; 321, first contact; 322, second contact; 323 324. Fourth contact point; 33. Baffle; 34. Screw; 35. T-head; 36. Protrusion; 37. First nut; 38. First pressing surface; 39. Second pressing surface; 30. First elastic element; 31. Arched part; 32. Translation part; 33. Lateral elastic deformation unit; 34. Second elastic element; 35. Second nut; 36. Third elastic element; 47. Adjusting plate; 48. First conical groove; 49. Second conical groove. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] Please see Figure 1 , Figure 5 As shown, the precision size sensing measuring instrument based on a glass substrate provided by this invention can, for example, be used to detect the relative position between two adjacent mirrors 100 in a telescope reflector array. In a spliced ​​mirror system of an astronomical telescope, the positional accuracy between adjacent sub-mirrors is crucial for achieving optical co-phase, directly determining the imaging quality and light-gathering capability of the entire reflecting surface. Only by achieving sub-nanometer-level relative positional stability can the system ensure higher angular resolution and light flux. However, existing measuring instruments struggle to meet this accuracy requirement. On one hand, sub-mirrors are made of high surface quality materials such as optical glass, making it difficult for traditional sensors to find stable and reliable mechanical attachment points without damaging the mirror surface. On the other hand, to achieve extremely high measurement resolution, the sensor and its fixing structure must possess extreme rigidity. However, existing materials are prone to micro-drift of the reference position under the influence of environmental micro-vibrations, temperature changes, or gravitational release, leading to non-consistent drift in measurement results, which severely restricts the accuracy and reliability of co-phase control. To this end, the precision size sensing measuring instrument based on a glass substrate provided by the present invention utilizes a rooting block 31 bonded to the lens 100. The rooting block 31 is only used to provide a point of force and is not used as a positioning reference. In addition, a base 32 is elastically connected to the rooting block 31. The base 32 elastically abuts against the back and side of the lens 100 in two different directions, thereby achieving precise positioning of the base 32. The elastic abutment method can ensure that the base 32 and the lens 100 maintain reliable contact, thereby avoiding reference offset caused by assembly errors or loosening. Finally, the target object 11 and the sensing element 21 of the measuring instrument are fixed on the base 32 of the two lenses 100 respectively, which can realize high-precision measurement of the relative position of two adjacent lenses 100.

[0034] The technical solution of the present invention will be described in detail below with reference to specific embodiments:

[0035] Please see Figures 1 to 10As shown, the precision size sensing measuring instrument based on a glass substrate provided by the present invention includes a target carrier 10, a sensor carrier 20, and a fixing assembly 30; the target carrier 10 is provided with a target object 11 to be measured; the sensor carrier 20 is provided with a sensing element 21 for detecting the position of the target object 11; the fixing assembly 30 is used to fix the target carrier 10 to the back of one of the lenses 100; and to fix the sensor carrier 20 to the back of an adjacent lens 100; the fixing assembly 30 includes a rooting block 31 and a base 32, the rooting block 31 being glued to the base 32. The back of the lens 100 is fixedly attached, and the base 32 is connected to the rooting block 31 via a fastening assembly. The base 32 has at least three first contact points 321 opposite to the back of the lens 100 and at least two second contact points 322 opposite to the side of the lens 100. The fastening assembly is configured to generate a first elastic force in a first direction and a second elastic force in a second direction on the base 32, wherein the first elastic force causes the first contact points 321 to press against the back of the lens 100, and the second elastic force causes the second contact points 322 to press against the side of the lens 100. The base 32 and / or the rooting block 31 have mounting portions for mounting measuring instruments and limiting the relative position of the measuring instruments with respect to the lens 100. It should be understood that adjacent lenses 100 are not coplanar, but rather form a certain angle with each other. That is, there is a reference plane between adjacent lenses 100 that makes them symmetrical about the reference plane. In a specific embodiment, the first direction may be, for example, a direction that is parallel to the reference plane and perpendicular to the opposite side of the adjacent lens 100, and the second direction may be, for example, the normal of the reference plane.

[0036] In a specific embodiment, the sensing element 21 may be, for example, an eddy current sensor, and the target object 11 may be, for example, a metal plate.

[0037] This invention utilizes the anchor block 31, which is adhesively bonded to the back of the lens 100, avoiding the need to find mechanical attachment points on fragile optical surfaces. Simultaneously, because the base 32 is elastically connected to the anchor block 31 via a fastening assembly, rather than being rigidly fixed directly, and because the base 32 elastically abuts against the back and side of the lens 100 via first contact 321 and second contact 322 respectively, it achieves adaptive and precise positioning of the base 32 with the lens surface itself as a reference. The elastic abutment structure generates a continuous preload, compensating for minor deformations caused by assembly errors, adhesive curing, or temperature changes, ensuring reliable contact between the base 32 and the lens 100. More importantly, it directly traces the positioning reference of the base 32 and the sensor element 21 or target object fixed on it to the highly rigid glass lens. Therefore, even with micro-vibrations or temperature fluctuations in the environment, reference drift caused by insufficient rigidity of the fixing material is greatly suppressed, effectively eliminating the inconsistency drift in the relative position measurement between the two bases 32. This provides a stable and reliable physical basis for achieving sub-nanometer-level optical co-phase measurement accuracy.

[0038] Please see Figure 3 , Figure 4 as well as Figures 6 to 10As shown, in an optional embodiment of the present invention, the fastening assembly includes a screw 33, a first nut 34, a first elastic element 35, and a second elastic element 36; the screw 33 is mounted on the rooting block 31, and a limiting portion for preventing the screw 33 from moving away from the lens 100 is provided between the screw 33 and the rooting block 31; the first nut 34 is threadedly connected to the screw 33, and the first nut 34 has a first pressing surface 341 and a second pressing surface 342 facing the back of the lens 100 in a stepped manner; the first elastic element 35 is disposed between the first pressing surface 341 and the rooting block 31, and the second elastic element 36 is disposed between the second pressing surface 342 and the base 32, and the second elastic element 36 is used to apply the first elastic force to the base 32. In a specific embodiment, in order to make the base 32 bear force evenly, a first pad 301 can be provided between the second elastic element 36 and the base 32. In this embodiment, by designing the first nut 34 with a stepped distribution of a first clamping surface 341 and a second clamping surface 342, a single nut can simultaneously perform the dual functions of axial fixation of the screw 33 and elastic loading of the base 32. This simplifies the structure, reduces space occupation, and significantly improves the stability and reliability of reference transmission. Specifically, the first clamping surface 341 presses the screw 33 against the limiting part of the anchor block 31 through the first elastic element 35, ensuring that the position of the screw 33 itself relative to the anchor block 31 is fixed. At the same time, the second clamping surface 342 applies a first elastic force to the base 32 through the second elastic element 36, so that the first contact point 321 of the base 32 continuously presses against the back of the lens 100, avoiding reference drift that may be caused by assembly gaps or uneven force between multiple independent fasteners.

[0039] Please see Figure 7 , Figure 11As shown, in an optional embodiment of the present invention, the first elastic element 35 includes an arched portion 351 and a translational portion 352. The arched portion 351 is located between the first pressing surface 341 and the rooting block 31. One end of the arched portion 351 near the second contact point 322 is fixedly connected to the rooting block 31, and the other end of the arched portion 351 away from the second contact point 322 is connected to the translational portion 352. The translational portion 352 is slidably connected to the rooting block 31 along the second direction. One end of the arched portion 351 is connected to a lateral elastic deformation unit 353, which is disposed opposite to a baffle 324 disposed on the base 32 along the second direction; the first elastic element 35 is configured to drive the lateral elastic deformation unit 353 to press against the baffle 324 along the second direction when the arched portion 351 is compressed and deformed by the first nut 34, and the lateral elastic deformation unit 353 is used to apply the second elastic force to the base 32. It should be understood that when the first nut 34 presses the arched portion 351 through the first pressing surface 341, the compression deformation of the arched portion 351 is not only used to directly generate the elastic force that makes the screw 33 press against the rooting block 31, but also transmits the motion to the lateral elastic deformation unit 353 through the translation part 352 fixed to it, driving it to press against the baffle 324 of the base 32 along the second direction, thereby applying a second elastic force to the base 32 to make the second contact point 322 press against the side of the lens 100. This allows a single fastening operation to simultaneously ensure the dual positioning of the base 32 in the normal and tangential directions on the back of the lens 100. This not only simplifies the assembly process and reduces the number of parts, but more importantly, it ensures the mechanical synergy and timing reliability between the first elastic force and the second elastic force. For example, by pre-setting the relative positions of the first pressing surface 341 and the second pressing surface 342, it can be ensured that the elastic deformation unit first presses against the base 32 along the second direction, and then the second elastic element 36 presses against the base 32 along the first direction.

[0040] Please see Figure 11 , Figure 12As shown, in an optional embodiment of the present invention, the rooting block 31 has a waist-shaped hole 311 on the side away from the lens 100, and the screw 33 has a T-shaped head 331 at the end near the lens 100 that matches the contour of the waist-shaped hole 311. The waist-shaped hole 311 has a cavity 312 at the end near the lens 100 for the T-shaped head 331 to rotate. The cavity wall on the side away from the lens 100 of the cavity 312 has a locking groove 313 that matches the contour of the T-shaped head 331. The locking groove 313 is set at a certain angle to the waist-shaped hole 311, and the locking groove 313 and the T-shaped head 331 form the limiting part. It should be understood that when installing the screw 33, simply push the T-head 331 of the screw 33 into the cavity 312 through the waist-shaped hole 311, and then rotate it at a certain angle to align it with the locking groove 313 and engage it. This completes the axial locking of the screw 33 on the anchor block 31 without the need for additional fasteners or complex operations. This not only avoids the assembly gaps or loosening risks that may exist in traditional threaded connections or pin fixation, but also allows the limiting reference of the screw 33 to be directly integrated into the anchor block 31 body fixed to the lens 100, effectively shortening the force transmission path. When tightening the first nut 34 later, the screw 33 can withstand the axial preload with extremely low relative displacement risk, improving the repeatability and anti-disturbance capability.

[0041] Please see Figure 8 , Figure 11 As shown, in an optional embodiment of the present invention, the T-head 331 has two protrusions 332 at the end opposite to the locking groove 313, and the two protrusions 332 are symmetrically arranged on both sides of the screw 33. This embodiment significantly improves the ease of operation and the reliability of limiting the screw during the rotation and locking process by symmetrically arranging two protrusions at the end of the T-head opposite to the locking groove. Specifically, when the screw is rotated to the locking position, the two symmetrical protrusions contact the side wall or bottom surface of the locking groove. On the one hand, this provides the operator with a clear sense of positioning through tactile feedback or slight resistance changes, avoiding limiting failure caused by excessive or insufficient rotation. On the other hand, the protrusions and the locking groove form a local interference or elastic abutment, increasing the frictional resistance in the locked state and effectively preventing the screw from spontaneously rotating and loosening due to vibration or temperature changes.

[0042] Please see Figure 12As shown, the rooting block 31 has an overflow groove 315 at the end that contacts the lens 100. The overflow groove 315 is distributed at least along the circumferential and / or radial direction of the rooting block 31. This embodiment effectively solves the problems of decreased bonding stability and reference drift caused by uneven adhesive layer thickness, air bubble residue, or overflow contamination of the lens surface during the bonding process by providing an overflow groove distributed at least along the circumferential and / or radial direction at the end of the rooting block that contacts the lens. Specifically, when the rooting block is fixed to the back of the lens by adhesive bonding, the overflow groove provides a controllable space for excess adhesive, avoiding disorderly overflow of adhesive to the lens edge or non-bonded area due to extrusion, thereby preventing potential damage to the optical surface of the lens due to adhesive layer contamination. At the same time, the circumferential and / or radial distribution structure of the overflow groove helps to guide the adhesive to fill the bonding interface evenly, ensuring that the adhesive layer thickness is consistent and there is no air bubble retention, so that a stable and uniform adhesive layer is formed between the rooting block and the lens.

[0043] Please see Figure 11 , Figure 12 As shown, the sidewall of the rooting block 31 has at least one flat surface 314. This embodiment provides an intuitive mechanical reference for the precise orientation and installation of the rooting block by setting at least one flat surface on the sidewall of the rooting block, thereby effectively solving the problem of deviation in the bonding angle of the rooting block caused by the difference in the tilt direction of the lens, which in turn affects the measurement accuracy of the sensor. Specifically, in the astronomical telescope splicing mirror system, there is a specific tilt angle between adjacent sub-mirrors. The bottom of the rooting block needs to be processed to match the slope to ensure that the base and the measuring elements on it obtain the correct spatial posture. During installation, the operator only needs to align the straightedge or reference surface with the flat surface and keep the flat surface flush with the edge of the lens to quickly and accurately determine the circumferential orientation of the rooting block, avoiding angle errors caused by visual inspection or experience installation.

[0044] Please see Figure 3 , Figure 4 As shown, in an optional embodiment of the present invention, the fixing components 30 are provided in two sets. One set of fixing components 30 is used to fix the target carrier 10 to the back of one of the lenses 100; the other set of fixing components 30 is used to fix the sensor carrier 20 to the back of an adjacent lens 100. It should be understood that, in order to accommodate different installation positions of the target carrier 10 and the sensor carrier 20, the specific shape and size of the base 32 in the two sets of fixing components 30 may differ.

[0045] Please see Figure 6 , 9As shown in Figure 10, in an optional embodiment of the present invention, a height adjustment component is provided between the fixing component 30 and the target carrier 10 and / or the sensor carrier 20; the height adjustment component is configured to enable the target carrier 10 and / or the sensor carrier 20 to remain relatively fixed to the fixing component 30 at multiple different heights. This embodiment solves the compatibility problem caused by the height difference fluctuation between adjacent lenses 100 during actual assembly far exceeding the sensor's sub-nanometer measurement stroke by setting a height adjustment component between the fixed component 30 and the target carrier 10 or sensor carrier 20. Specifically, since optical cophase requires the sensor to have extremely high resolution and a very small range, it cannot directly cover geometric height differences of several millimeters. However, this embodiment, through the height adjustment component, can pre-adjust the target carrier 10 or sensor carrier 20 to a suitable position that matches the actual height of the mirror during installation, so that the initial distance between the sensing element 21 and the measured target object 11 falls within the high-precision working range of the sensor. The height adjustment component absorbs a large range of assembly tolerances and mirror step differences, and ensures that the measuring instrument always operates within its optimal small stroke. Thus, without sacrificing measurement resolution, it greatly improves the system's adaptability to different spliced ​​mirror configurations and the fault tolerance of on-site assembly, providing the necessary installation margin for stable sub-nanometer cophase measurement.

[0046] In the illustrated embodiment, a height adjustment component is provided only between the target carrier 10 and the fixing component 30. However, it should be understood that in some other embodiments, a height adjustment component may also be provided between the sensor carrier 20 and the fixing component 30 in order to increase the range of stroke adjustment or the fineness of adjustment.

[0047] Please see Figure 6 , 9As shown in Figure 10, in an optional embodiment of the present invention, the height adjustment assembly includes an adjustment plate 40, which is disposed along the first direction between the base 32 and the target carrier 10 or the sensor carrier 20. At least three third contacts 12 are provided on the side of the target carrier 10 or the sensor carrier 20 opposite to the adjustment plate 40, and at least three fourth contacts 323 are provided on the side of the base 32 opposite to the adjustment plate 40. The screw 33 and the fourth contacts 323 constitute the mounting portion. On the opposite side of the adjustment plate 40, a first conical groove 41 is provided to cooperate with each of the third contacts 12. The first conical groove 41 is provided in at least two sets, and each set includes a plurality of first conical grooves 41 corresponding to the number of the third contacts 12. On the opposite side of the adjustment plate 40 to the base 32, a second conical groove 42 is provided to cooperate with each of the fourth contacts 323. The second conical groove 42 is provided in at least two sets, and each set includes a plurality of second conical grooves 42 corresponding to the number of the fourth contacts 323. The depth of the first conical grooves 41 in different sets is different, and / or the depth of the second conical grooves 42 in different sets is different. In this embodiment, multiple sets of conical grooves of different depths are set on the adjustment plate 40, which form a ball-and-socket fit with the contacts on the target carrier 10 or sensor carrier 20 and the base 32. This achieves the dual functions of height difference adjustment and precise self-centering, thereby ensuring installation flexibility while effectively avoiding reference offset caused by assembly errors. Specifically, when it is necessary to adapt to the height difference between different lenses 100, it is only necessary to select the corresponding set of conical grooves for assembly. The automatic centering characteristics of the spherical and conical surfaces can make the target carrier 10 or sensor carrier 20 obtain a unique and stable position on the three support points, eliminating tilt or translation errors that may be caused by planar bonding or threaded connection.

[0048] Please see Figure 6 As shown, in an optional embodiment of the present invention, each of the first contact 321, the third contact 12, and the fourth contact 323 is aligned one by one along the first direction. This embodiment constructs a vertical force transmission path from the back of the lens 100 through the base 32 and the adjustment plate 40 to the target carrier 10 or sensor carrier 20 by aligning the first contact 321, the third contact 12, and the fourth contact 323 along the first direction. This achieves height adjustment while minimizing additional bending moments and torsional deformation caused by force line deflection, thus ensuring that the height adjustment component does not introduce additional tilt or torsional errors when changing the installation height.

[0049] Please see Figure 3 , Figure 6 , Figure 9 , Figure 10As shown, in an optional embodiment of the present invention, in response to the provision of a height adjustment component between the fixing component 30 and the target carrier 10, a second nut 37 is provided on the screw 33 of the fixing component 30 where the target carrier 10 is located. The second nut 37 is located on the side of the target carrier 10 opposite to the lens 100. A third elastic element 38 is provided between the second nut 37 and the target carrier 10. The second nut 37 elastically presses the target carrier 10 along the first direction through the third elastic element 38. In a specific embodiment, in order to ensure that the target carrier 10 is subjected to uniform force, a second pad 101 can be provided between the third elastic element 38 and the target carrier 10. This embodiment achieves an elastic pre-tightening connection between the target carrier 10 and the fixing component 30 by setting a second nut 37 and a third elastic element 38 on the back side of the target carrier 10. This effectively suppresses the loosening of the target carrier 10 and the reference drift caused by vibration or temperature changes while ensuring the height adjustment function. Specifically, when the second nut 37 is tightened, it applies a continuous elastic force along the first direction to the target carrier 10 through the third elastic element 38, so that the third contact point 12 on the lower side of the target carrier 10 is always in close contact with the first conical groove 41 of the adjusting plate 40. This elastic contact method not only compensates for the slight loosening that may be caused by manufacturing tolerances, assembly gaps or thermal deformation of parts, but more importantly, it presses the target carrier 10 onto the adjusting plate 40, which has been precisely positioned by the contact system, so that it maintains a stable spatial posture.

[0050] Similarly, in other embodiments not shown in the figure, in response to the provision of a height adjustment component between the fixing component and the sensor carrier, a second nut is provided on the screw of the fixing component where the sensor carrier is located. The second nut is located on the side of the sensor carrier facing away from the lens. A third elastic element is provided between the second nut and the sensor carrier. The second nut elastically presses the sensor carrier along the first direction through the third elastic element.

[0051] In an optional embodiment of the present invention, the rooting block 31, the base 32, the target carrier 10, the sensor carrier 20, and the adjustment plate 40 are made of quartz glass. Quartz glass has an extremely low coefficient of thermal expansion and a high elastic modulus. Its excellent dimensional stability allows the entire measurement link to maintain synchronous micro-deformation with the optical glass lens 100 when facing temperature changes, greatly suppressing relative displacement caused by thermal mismatch. At the same time, its high stiffness effectively resists structural deformation caused by environmental micro-vibrations and gravity release, ensuring the contact stability of each contact system.

[0052] In summary, this invention utilizes the anchoring block 31 to adhesively bond to the back of the lens 100, avoiding the need to find mechanical attachment points on the vulnerable optical surface. Simultaneously, since the base 32 is elastically connected to the anchoring block 31 via a fastening assembly rather than rigidly fixed, and the base 32 elastically abuts against the back and side of the lens 100 via the first contact 321 and the second contact 322 respectively, adaptive and precise positioning of the base 32 with the lens surface itself as a reference is achieved. The excellent dimensional stability of quartz glass allows the entire measurement link to maintain synchronous micro-deformation with the optical glass lens 100 when facing temperature changes, greatly suppressing relative displacement caused by thermal mismatch. Furthermore, its high rigidity effectively resists structural deformation caused by environmental micro-vibrations and gravity release, ensuring the contact stability of each contact system.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0054] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

Claims

1. A fixing assembly for mounting a lens measuring instrument, characterized in that, include: Rooting block (31) is used to attach to the back of lens (100) by adhesive. The base (32) is connected to the rooting block (31) by a fastening assembly. The base (32) has at least three first contacts (321) opposite to the back of the lens (100) and at least two second contacts (322) opposite to the side of the lens (100). The fastening assembly is configured to generate a first elastic force in a first direction and a second elastic force in a second direction on the base (32). The first elastic force causes the first contacts (321) to press against the back of the lens (100), and the second elastic force causes the second contacts (322) to press against the side of the lens (100). The base (32) and / or the rooting block (31) are provided with mounting parts for mounting measuring instruments and limiting the relative position of the measuring instruments and the lens (100).

2. The fixing assembly for mounting a lens measuring instrument according to claim 1, characterized in that, The fastening assembly includes a screw (33), a first nut (34), a first elastic element (35), and a second elastic element (36). The screw (33) is mounted on the rooting block (31), and a limiting part is provided between the screw (33) and the rooting block (31) to prevent the screw (33) from moving away from the lens (100). The first nut (34) is threadedly connected to the screw (33), and the first nut (34) has a first pressing surface (341) and a second pressing surface (342) distributed in a stepped manner facing the back of the lens (100). The first elastic element (35) is disposed between the first pressing surface (341) and the rooting block (31), and the second elastic element (36) is disposed between the second pressing surface (342) and the base (32). The second elastic element (36) is used to apply the first elastic force to the base (32).

3. The fixing assembly for mounting a lens measuring instrument according to claim 2, characterized in that, The first elastic element (35) includes an arched portion (351) and a translational portion (352). The arched portion (351) is located between the first pressing surface (341) and the rooting block (31). One end of the arched portion (351) near the second contact point (322) is fixedly connected to the rooting block (31). The other end of the arched portion (351) away from the second contact point (322) is connected to the translational portion (352). The translational portion (352) is slidably connected to the rooting block (31) along the second direction. The other end of the translational portion (352) away from the arched portion (351) is connected to the rooting block (31). One end of 51) is connected to a lateral elastic deformation unit (353), which is disposed opposite to a baffle (324) provided on the base (32) along the second direction; the first elastic element (35) is configured to drive the lateral elastic deformation unit (353) to press against the baffle (324) along the second direction when the arch (351) is compressed and deformed by the first nut (34), and the lateral elastic deformation unit (353) is used to apply the second elastic force to the base (32).

4. The fixing assembly for mounting a lens measuring instrument according to claim 2, characterized in that, The rooting block (31) has a waist-shaped hole (311) on the side away from the lens (100). The screw (33) has a T-shaped head (331) that matches the contour of the waist-shaped hole (311) at the end near the lens (100). The waist-shaped hole (311) has a cavity (312) for the T-shaped head (331) to rotate at the end near the lens (100). The cavity wall of the cavity (312) away from the lens (100) has a locking groove (313) that matches the contour of the T-shaped head (331). The locking groove (313) is set at a certain angle with the waist-shaped hole (311). The locking groove (313) and the T-shaped head (331) together form the limiting part.

5. The fixing assembly for mounting a lens measuring instrument according to claim 4, characterized in that, The T-head (331) has two protrusions (332) at one end opposite to the locking groove (313), and the two protrusions (332) are symmetrically arranged on both sides of the screw (33).

6. The fixing assembly for mounting a lens measuring instrument according to claim 1, characterized in that, The rooting block (31) has an overflow groove (315) at one end that contacts the lens (100), and the overflow groove (315) is distributed at least along the circumference and / or radial direction of the rooting block (31).

7. The fixing assembly for mounting a lens measuring instrument according to claim 1, characterized in that, The sidewall of the rooting block (31) is provided with at least one plane (314).

8. The fixing assembly for mounting a lens measuring instrument according to claim 2, characterized in that, The base (32) has at least three fourth contacts (323) on the side opposite to the lens (100), and each of the first contacts (321) and each of the fourth contacts (323) are aligned one by one along the first direction; the screw (33) and the fourth contacts (323) constitute the mounting part.

9. The fixing assembly for mounting a lens measuring instrument according to claim 1, characterized in that, The rooting block (31) and the base (32) are made of quartz glass.

10. A measuring instrument, characterized in that, It includes a sensing element (21) and a target object (11), wherein the sensing element (21) and the target object (11) are respectively mounted on the back of two adjacent lenses (100) by a fixing assembly (30) according to any one of claims 1 to 9.

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