A high-precision optical lens processing device and its working method

Abstract

The present invention relates to a high-precision optical lens processing device, which includes a numerically controlled horizontal lathe and an optical optical axis alignment and image adjustment mechanism, an autocollimator optical eccentricity measurement mechanism, and an autocollimator position adjustment mechanism on the lathe. By adjusting the position of the optical optical axis, the lens group to be processed is made coaxial with the rotating shaft. Through a series of operations such as processing, inspection, correction, and measurement of the lens holder, the processing accuracy of the optical lens and the lens holder is improved, and the production efficiency is increased, thereby improving the imaging quality of the optical lens assembly.

Description

Technical Field

[0001] The present invention relates to a high-precision optical lens processing device and its working method, belonging to the technical field of centering lens group processing. Background Art

[0002] In the field of optical processing systems, the performance requirements for optical systems are getting higher and higher. The centering deviation is the main factor affecting the optical imaging system. If there is a centering deviation, even if the lens has the best surface shape accuracy, a high-precision optical imaging system cannot be achieved. Traditional optical processing methods mostly use pure mechanical alignment and adjustment, with low processing accuracy and efficiency, and large centering deviations, gradually unable to meet the increasingly high assembly accuracy requirements of optical systems. Therefore, there is an urgent need for a high-precision optical lens processing device for optical processing, which can not only perform a series of operations such as detection, adjustment, and processing of optical lens groups, but also quickly clamp and quickly align the eccentricity to complete the processing and detection procedures, thereby solving the processing and detection problems of optical lens groups, achieving high-precision requirements for various tolerances including air gap and centering deviation during the assembly process of the lens group, and achieving high-quality imaging requirements for the overall optical lens group. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a high-precision optical lens processing device and its working method.

[0004] To solve the above technical problems, the technical solution of the present invention is: a high-precision optical lens processing device, including a numerically controlled horizontal lathe and an optical optical axis alignment and imaging mechanism, a self-collimator optical eccentricity measurement mechanism, and a self-collimator position adjustment mechanism on the lathe;

[0005] The self-collimator position adjustment mechanism includes a three-dimensional moving platform capable of performing position adjustment in the X-axis, Y-axis, and Z-axis directions. A rotating seat body for horizontal rotation adjustment around the Z-axis is provided on the mounting seat body at the final execution end of the three-dimensional moving platform, and a fastening member for restricting or allowing its horizontal rotation is provided on the rotating seat body;

[0006] The optical optical axis alignment and imaging mechanism includes a machine tool connection seat. An outer sleeve is coaxially fixed to the outer end of the machine tool connection seat. A first inner sleeve is inserted into the outer sleeve, and a second inner sleeve is inserted into the first inner sleeve. A tooling for the lens group to be measured is installed on the second inner sleeve. Among them: the outer spherical surface at the outer end of the second inner sleeve contacts the inner spherical surface at the outer end of the first inner sleeve, the outer spherical surface at the outer end of the first inner sleeve contacts the inner spherical surface at the outer end of the outer sleeve. A plurality of first screws and second screws are evenly distributed in a circumferential manner on the outer sleeve. The plurality of first screws and second screws are arranged alternately. The first screws are all screwed into the outer sleeve and then abut against the aspherical outer periphery of the first inner sleeve. The second screws are all screwed into the outer sleeve and then pass through the through holes for accommodation on the first inner sleeve and abut against the aspherical outer periphery of the second inner sleeve;

[0007] The autocollimator optical eccentricity measuring mechanism comprises a light tube, and a light source and a CCD camera connected inside the light tube;

[0008] The machine tool connecting seat of the optical alignment axis image adjustment mechanism is clamped on the rotating spindle of the lathe, and the optical tube of the autocollimator optical eccentricity measurement mechanism is fixedly connected to the rotating seat body, and the optical tube is aligned with the lens group to be measured of the optical alignment axis image adjustment mechanism.

[0009] Preferably, a movable seat body is arranged below the mounting seat body, a lifting seat body is arranged below the movable seat body, a workbench is arranged below the lifting seat body, and the workbench is fixed on the lathe frame; wherein, the mounting seat body is connected to the movable seat body via a ball screw pair and a slider rail moving pair in the Y-axis direction, the movable seat body is connected to the lifting seat body via a ball screw pair and a slider rail moving pair in the X-axis direction, and the lifting seat body is connected to the workbench via a lifting drive assembly.

[0010] Preferably, the lifting drive assembly includes a vertical screw, which is threaded on the workbench, the top end of the vertical screw is fixedly connected to the handle, the bottom end of the vertical screw is connected to the adapter plate via a bearing, a guide rod is vertically fixedly connected to the adapter plate, and the guide rod passes through the guide hole on the workbench and the top end is fixedly connected to the lifting seat body.

[0011] Preferably, the rotating seat body and the mounting seat body are connected via a ball joint, and the ball joint is arranged at the rotation Z-axis position of the rotating seat body.

[0012] Preferably, the fastener is a locking screw, which passes through a clearance notch provided on the rotating seat body and is then threadedly connected to the mounting seat body, and a first spring is sleeved on the locking screw between the mounting seat body and the rotating seat body; a rotating plate body is provided on the upper surface of the rotating seat body, an arc-shaped guide groove is provided on the rotating plate body, the center of the arc-shaped guide groove is located on the rotation Z-axis of the rotating seat body, a vertical guide rod is passed through the inside of the arc-shaped guide groove, the bottom end of the vertical guide rod is fixedly connected to the rotating seat body, and the top end of the vertical guide rod is threadedly connected to a limited position Nut, the upper surface of the rotating seat body is symmetrically fixed with a micrometer head fixing seat on both sides of the rotating Z axis, and the micrometer head fixing seats are all installed with micrometer heads, and the heads of the micrometer heads are all in contact with the side of the rotating plate body, and an axially horizontal second spring is connected between the side and the micrometer head fixing seat; the upper surface of the rotating plate body is fixed with a light pipe fixing seat, and the light pipe fixing seat includes a lower base and an upper hoop body, the lower base and the upper hoop body are screwed and fastened by screws, and the lower base and the upper hoop body are assembled to form a circular channel for clamping the light pipe.

[0013] Preferably, the outer sleeve is threadedly connected to the outer end of the machine tool connecting seat; the outer end of the outer sleeve is the insertion end of the first inner sleeve, the outer end of the first inner sleeve is the insertion end of the second inner sleeve, and the outer end of the second inner sleeve is the tooling insertion end of the lens group to be measured.

[0014] Preferably, an installation hole for the tooling is coaxially arranged inside the second inner sleeve, and an elastic collet is coaxially fixed on the installation hole. The elastic collet includes a collet base body, and a plurality of arc-shaped collet pieces are evenly distributed around the circumference of the collet base body. There is a gap between two adjacent collet pieces. The outer ends of the collet pieces have external chamfers and are located on the locking hole at the outer end of the installation hole. The inner diameter of the locking hole is larger than the inner diameter of the installation hole and is provided with internal threads. A tightening nut is screwed on the internal threads. The inner end edge of the tightening nut presses against the external chamfer to clamp the outer ends of several collet pieces, so as to clamp the clamping rod of the tooling inserted into the elastic collet. The outer end of the tooling is the installation position of the lens group to be measured.

[0015] Preferably, the angle between two adjacent first screws and second screws is 45°.

[0016] Preferably, the circumferential axial positions of the first screws and the second screws on the outer sleeve are different; the first screws all abut against the outer peripheral part of the first inner sleeve far from the spherical surface end, and the second screws all abut against the outer peripheral part of the second inner sleeve far from the spherical surface end.

[0017] A working method of a high-precision optical lens processing device is carried out according to the following steps:

[0018] (1) Turn on the autocollimator. When the light beam emitted by the electronic autocollimator is focused on the position where the center of curvature is located through the fixed-focus objective lens, the light beam is incident on the A surface of the lens group sample to be measured along the normal direction and is reflected. The reflected light cross target is imaged on the CCD plane, and after being processed by the computer, the cross target image is displayed on the monitor. If the cross target image cannot be displayed on the monitor, then adjust the position adjustment mechanism of the autocollimator until the cross target image is displayed on the monitor; the adjustment principle is: the three-dimensional moving platform performs position adjustment in the X-axis, Y-axis, and Z-axis directions, and the rotating seat drives the light tube to perform horizontal rotation adjustment around the Z-axis. The rotation adjustment is divided into coarse adjustment and fine adjustment. The coarse adjustment is to loosen and tighten the locking screw, and the rotating seat rotates horizontally around the Z-axis relative to the mounting seat; the fine adjustment is to adjust the differential heads on both sides to make the rotating plate rotate horizontally around the Z-axis relative to the rotating seat;

[0019] (2) Then rotate the main spindle of the lathe to measure the center deviation of the A surface of the sample. The cross target image forms a circle on the CCD plane. The center deviation value of the A surface of the sample is calculated by computer eccentricity. If the eccentricity value is within the design range, no adjustment is required; if the eccentricity value is outside the design range, adjust the optical alignment axis imaging mechanism until the eccentricity value of the A surface of the sample is within the design range. The adjustment principle is: by adjusting the abutting degree of several first screws respectively, change the skew posture of the first inner sleeve relative to the outer sleeve, and then on the basis of the posture of the first inner sleeve, further adjust the abutting degree of several second screws respectively to change the skew posture of the second inner sleeve relative to the first inner sleeve;

[0020] (3) After completing the adjustment of the A surface of the sample, change the position of the autocollimator so that the light beam emitted by it is incident on the B surface of the sample along the normal direction and reflected. The reflected light cross target also forms an image on the CCD plane. Similar to the adjustment steps of the A surface, also adjust the eccentricity value of the B surface within the design range. At this time, the optical axis of the lens is coaxial with the rotating main spindle of the lathe. Finally, the CNC horizontal lathe turns the lens holder of the lens group according to the design value, including the outer circle and the front and rear end faces, to ensure the structural dimensions of the lens holder of the lens group, and change the mechanical axis of the lens holder to make the optical axis of the lens of the lens assembly coaxial with the outer circle of the lens holder.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By adjusting the position of the optical alignment axis, the present invention makes the lens group to be processed coaxial with the rotating axis. Through a series of operations such as processing, inspection, correction and measurement of the lens holder, the processing accuracy of the optical lens and the lens holder is improved, the production efficiency is increased, and thus the imaging quality of the optical lens assembly is provided.

[0023] 2. The autocollimator optical eccentricity measurement mechanism of the present invention transmits the detected data to the computer for processing. After judging the position of the reflected image, adjust the optical alignment axis according to the center deviation to make the optical axis of the lens coaxial with the rotating axis of the lathe, and then control the turning tool of the horizontal lathe to turn the outer circle and the front and rear end faces of the lens holder, so that there is no center deviation in the lens group to be processed, realizing the coaxiality of the optical axis of the lens group adjusted by the optical alignment axis and the rotating main spindle, and turning the outer circle and the front and rear end faces of the lens holder, thereby ensuring the structural dimensions of the lens group.

[0024] 3. The adjustment orientation of the autocollimator position adjustment mechanism is diverse. The three-dimensional moving platform can perform position adjustment in the X-axis, Y-axis and Z-axis directions. A rotating seat body for horizontal rotation adjustment around the Z-axis is provided on the mounting seat body at the final execution end of the three-dimensional moving platform. A light pipe of the autocollimator is fixedly connected to the rotating seat body, and a fastener for restricting or allowing its horizontal rotation is provided on the rotating seat body, and the light pipe is driven by the rotating seat body to perform horizontal rotation adjustment around the Z-axis.

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the self-collimator position adjustment mechanism Figure 1 .

[0028] Figure 3 It is a schematic structural diagram of the self-collimator position adjustment mechanism Figure 2 .

[0029] Figure 4 It is a schematic partial structural diagram of the self-collimator position adjustment mechanism.

[0030] Figure 5 It is a schematic structural diagram of the optical axis alignment and imaging adjustment mechanism Figure 1 .

[0031] Figure 6 It is a schematic structural diagram of the optical axis alignment and imaging adjustment mechanism Figure 2 .

[0032] Figure 7 It is the Figure 6 A-A cross-sectional view of

[0033] Figure 8 It is a schematic structural diagram of the elastic bushing.

[0034] Figure 9 It is a schematic diagram of the adjustment process of the optical axis alignment and imaging adjustment mechanism Figure 1 .

[0035] Figure 10 It is a schematic diagram of the adjustment process of the optical axis alignment and imaging adjustment mechanism Figure 2 .

[0036] Figure 11 It is a schematic diagram of the adjustment process of the optical axis alignment and imaging adjustment mechanism Figure 3 . Specific Embodiments

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] As Figures 1 to 11 shown, this embodiment provides a high-precision optical lens processing device, including a numerically controlled horizontal lathe 1C and an optical axis alignment and image adjustment mechanism 2C, a self-collimator optical eccentricity measurement mechanism 3C, and a self-collimator position adjustment mechanism 4C on the lathe;

[0041] The self-collimator position adjustment mechanism includes a three-dimensional moving platform 1A capable of adjusting positions in the X-axis, Y-axis, and Z-axis directions. A rotating seat body 3A for horizontal rotation adjustment around the Z-axis is provided on the mounting seat body 2A at the final execution end of the three-dimensional moving platform, and a fastener for restricting or allowing its horizontal rotation is provided on the rotating seat body;

[0042] The optical axis alignment and image adjustment mechanism includes a machine tool connecting seat 1B. An outer sleeve 2B is coaxially fixed to the outer end of the machine tool connecting seat. A first inner sleeve 3B is inserted into the outer sleeve. A second inner sleeve 4B is inserted into the first inner sleeve. A tooling 6B for the lens group 5B to be measured is installed on the second inner sleeve. Among them: the outer spherical surface 7B at the outer end of the second inner sleeve contacts the inner spherical surface 8B at the outer end of the first inner sleeve. The outer spherical surface at the outer end of the first inner sleeve contacts the inner spherical surface at the outer end of the outer sleeve. A number of first screws 9B and second screws 10B are evenly distributed in a circumferential manner on the outer sleeve. The first screws and the second screws are arranged alternately. The first screws are all screwed into the outer sleeve and then abut against the aspherical outer circumference of the first inner sleeve. The second screws are all screwed into the outer sleeve and pass through the relief through hole 11B of the first inner sleeve and then abut against the aspherical outer circumference of the second inner sleeve;

[0043] The self-collimator optical eccentricity measurement mechanism includes an optical tube 4A, as well as a light source and a CCD camera connected inside the optical tube; the self-collimator optical eccentricity measurement mechanism is electrically connected to a computer and is provided with a control system and a data acquisition, analysis, and processing system. The self-collimator and its control, data acquisition, analysis, and processing systems all belong to the prior art and will not be elaborated in detail here.

[0044] The machine tool connecting seat of the optical axis alignment and image adjustment mechanism is clamped on the rotating main shaft 10C of the lathe. The optical tube of the self-collimator optical eccentricity measurement mechanism is fixed to the rotating seat body, and the optical tube is aligned with the lens group to be measured of the optical axis alignment and image adjustment mechanism.

[0045] In an embodiment of the present invention, the CNC horizontal lathe described herein also has a turning tool mechanism 5C and a probe detection mechanism 6C between the autocollimator position adjustment mechanism and the optical alignment axis adjustment mechanism. The turning tool mechanism and the probe detection mechanism can adjust the position along the X-axis and Y-axis, and have an X-axis guide structure 7C and a Y-axis guide structure 8C thereon, which belongs to the prior art on the lathe.

[0046] In the embodiment of the present invention, a movable seat body 5A is arranged below the mounting seat body, a lifting seat body 6A is arranged below the movable seat body, a workbench 7A is arranged below the lifting seat body, and the workbench is fixed on the lathe frame 9C; wherein, the mounting seat body is connected to the movable seat body via a ball screw pair and a slider rail moving pair in the Y-axis direction, the movable seat body is connected to the lifting seat body via a ball screw pair and a slider rail moving pair in the X-axis direction, and the lifting seat body is connected to the workbench via a lifting drive assembly.

[0047] In the embodiment of the present invention, the lifting drive assembly includes a vertical screw 8A, which is threadedly connected to the workbench, the top end of the vertical screw is fixedly connected to the handle 9A, the bottom end of the vertical screw is connected to the adapter plate 10A via a bearing, and a guide rod 11A is vertically fixedly connected to the adapter plate. The guide rod passes through the guide hole on the workbench and the top end is fixedly connected to the lifting seat body.

[0048] In an embodiment of the present invention, the rotating seat body and the mounting seat body are connected via a ball joint, and the ball joint is arranged at the rotation Z-axis position of the rotating seat body.

[0049] In the embodiment of the present invention, the fastener is a locking screw 12A, which passes through a clearance notch 13A provided on the rotating seat body and is then screwed onto the mounting seat body, and a first spring 14A is sleeved on the locking screw between the mounting seat body and the rotating seat body; a rotating plate body 15A is provided on the upper surface of the rotating seat body, an arc-shaped guide groove is provided on the rotating plate body, the center of the arc-shaped guide groove is located on the rotation Z axis of the rotating seat body, a vertical guide rod is passed through the inside of the arc-shaped guide groove, the bottom end of the vertical guide rod is fixedly connected to the rotating seat body, and a limiting nut is screwed onto the top end of the vertical guide rod. 18A, the upper surface of the rotating seat body is symmetrically fixed with a differential head fixing seat 19A on both sides of the rotating Z axis, and a differential head 20A is installed on the differential head fixing seat, and the head of the differential head is against the side of the rotating plate body, and the side and the differential head fixing seat are connected with an axially horizontal second spring 21A; the upper surface of the rotating plate body is fixed with a light pipe fixing seat, and the light pipe fixing seat includes a lower base 22A and an upper hoop body 23A, and the lower base and the upper hoop body are screwed and fastened, and the lower base and the upper hoop body are assembled to form a circular channel 17A for clamping the light pipe. The light pipe of the autocollimator is parallel to the X axis.

[0050] In an embodiment of the present invention, the outer sleeve is threadedly connected to the outer end of the machine tool connecting seat; the outer end of the outer sleeve is the insertion end of the first inner sleeve, the outer end of the first inner sleeve is the insertion end of the second inner sleeve, and the outer end of the second inner sleeve is the tooling insertion end of the lens group to be measured.

[0051] In an embodiment of the present invention, an installation hole 12B for the tooling is coaxially arranged inside the second inner sleeve, and an elastic clamping sleeve 13B is coaxially fixed on the installation hole. The elastic clamping sleeve includes a clamping sleeve base body 14B, and a plurality of arc-shaped clamping pieces 15B are circumferentially distributed on the clamping sleeve base body. There is a gap 16B between two adjacent clamping pieces. The outer end sides of the clamping pieces all have outer chamfers 17B and are located on a locking hole 18B at the outer end of the installation hole. The inner diameter of the locking hole is larger than the inner diameter of the installation hole and is provided with internal threads. A tightening nut 19B is screwed on the internal threads. The inner end edge of the tightening nut squeezes the outer chamfers to tighten the outer ends of a plurality of clamping pieces, so as to clamp the clamping rod of the tooling inserted inside the elastic clamping sleeve. The outer end of the tooling is the installation position of the lens group to be measured.

[0052] In an embodiment of the present invention, the angle between two adjacent first screws and second screws is 45°.

[0053] In an embodiment of the present invention, the circumferential axial positions of the first screws and the second screws on the outer sleeve are different; the first screws all abut against the outer peripheral part of the first inner sleeve far from the spherical surface end, and the second screws all abut against the outer peripheral part of the second inner sleeve far from the spherical surface end.

[0054] A working method of a high-precision optical lens processing device is carried out according to the following steps:

[0055] (1) Turn on the autocollimator. When the light beam emitted by the electronic autocollimator is focused on the position where the center of curvature is located through the fixed-focus objective lens, the light beam is incident on the A surface of the lens group sample to be measured along the normal direction and is reflected. The reflected light cross target is imaged on the CCD plane and, after being processed by the computer, the cross target image is displayed on the display. If the cross target image cannot be displayed on the display, then adjust the position adjustment mechanism of the autocollimator until the cross target image is displayed on the display; the adjustment principle is: the three-dimensional moving platform performs position adjustment in the X-axis, Y-axis, and Z-axis directions, and the rotating seat body drives the light tube to perform horizontal rotation adjustment around the Z-axis. Among them, the rotation adjustment is divided into coarse adjustment and fine adjustment. The coarse adjustment is carried out by loosening and tightening the locking screw, and the rotating seat body rotates horizontally around the Z-axis relative to the installation seat body; the fine adjustment is carried out by adjusting the differential heads on both sides, so that the rotating plate body rotates horizontally around the Z-axis relative to the rotating seat body;

[0056] (2) Then rotate the lathe spindle to measure the center deviation of surface A of the sample. The cross target image forms a circle on the CCD plane. The center deviation value of surface A of the sample is calculated by computer eccentricity. If the eccentricity value is within the design value range, no adjustment is required; if the eccentricity value is outside the design value range, adjust the optical alignment axis image adjustment mechanism until the eccentricity value of surface A of the sample is within the design value range. The adjustment principle is: by adjusting the contact degree of several first screws respectively, the skewed posture of the first inner sleeve relative to the outer sleeve is changed, and then the contact degree of several second screws is further adjusted on the basis of the posture of the first inner sleeve to change the skewed posture of the second inner sleeve relative to the first inner sleeve; several first screws always support the first inner sleeve for axial limitation, and several second screws always support the second inner sleeve for axial limitation. When adjusting, make way for the through hole to avoid interference with the second screw. The above adjustment action amplitudes are all fine-tuning;

[0057] (3) After completing the adjustment of surface A of the sample, change the position of the autocollimator so that the light beam it emits is incident on surface B of the sample along the normal direction and is reflected. The reflected light cross target is also imaged on the CCD plane. The same adjustment steps are used for surface A. The eccentricity value of surface B is also adjusted within the design value range. At this time, the optical axis of the lens is coaxial with the rotating spindle of the lathe. Finally, the CNC horizontal lathe is used to turn the lens seat of the lens assembly according to the design value, including the outer circle and the front and rear end faces, to ensure the structural dimensions of the lens seat of the lens assembly, and to change the mechanical axis of the lens seat to achieve the coaxiality of the optical axis of the lens assembly with the outer circle of the lens seat.

[0058] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A high-precision optical lens processing device, characterized in that: It includes a numerically controlled horizontal lathe, an optical optical axis alignment and image adjustment mechanism on the lathe, a self-collimator optical eccentricity measurement mechanism, and a self-collimator position adjustment mechanism; The self-collimator position adjustment mechanism includes a three-dimensional moving platform capable of performing position adjustment in the X-axis, Y-axis, and Z-axis directions. A rotating seat body for horizontal rotation adjustment around the Z-axis is provided on the mounting seat body at the final execution end of the three-dimensional moving platform, and a fastener for restricting or allowing its horizontal rotation is provided on the rotating seat body; The optical optical axis alignment and image adjustment mechanism includes a machine tool connecting seat. An outer sleeve is coaxially fixed to the outer end of the machine tool connecting seat. A first inner sleeve is inserted into the inner part of the outer sleeve, and a second inner sleeve is inserted into the inner part of the first inner sleeve. A tooling for mounting a mirror group to be measured is installed on the second inner sleeve. Among them: The outer spherical surface at the outer end of the second inner sleeve contacts the inner spherical surface at the outer end of the first inner sleeve, the outer spherical surface at the outer end of the first inner sleeve contacts the inner spherical surface at the outer end of the outer sleeve. A number of first screws and second screws are evenly distributed in a circumferential manner on the outer sleeve. The number of first screws and second screws are arranged alternately. The first screws are all screwed onto the outer sleeve and then abut against the outer periphery of the aspherical surface of the first inner sleeve. The second screws are all screwed onto the outer sleeve and then pass through the relief through holes of the first inner sleeve and then abut against the outer periphery of the aspherical surface of the second inner sleeve; The self-collimator optical eccentricity measurement mechanism includes an optical tube, as well as a light source and a CCD camera connected inside the optical tube; The machine tool connecting seat of the optical optical axis alignment and image adjustment mechanism is clamped on the rotating main shaft of the lathe. The optical tube of the self-collimator optical eccentricity measurement mechanism is fixedly connected to the rotating seat body, and the optical tube is aligned with the mirror group to be measured of the optical optical axis alignment and image adjustment mechanism; The fastener is a locking screw. The locking screw passes through the relief notch opened on the rotating seat body and is then screwed onto the mounting seat body. A first spring is sleeved on the locking screw between the mounting seat body and the rotating seat body. A rotating plate body is provided on the upper surface of the rotating seat body. An arc-shaped guide groove is opened on the rotating plate body. The center of the arc-shaped guide groove is located on the rotating Z-axis of the rotating seat body. A vertical guide rod is inserted into the arc-shaped guide groove. The bottom end of the vertical guide rod is fixedly connected to the rotating seat body, and a limit nut is screwed onto the top end of the vertical guide rod. Differential head fixing seats are symmetrically fixedly connected to both sides of the rotating Z-axis on the upper surface of the rotating seat body. Differential heads are installed on the differential head fixing seats. The heads of the differential heads all abut against the side part of the rotating plate body, and a second spring in the axial horizontal direction is connected between this side part and the differential head fixing seat; A light tube fixing seat is fixedly connected to the upper surface of the rotating plate body. The light tube fixing seat includes a lower base and an upper hoop. The lower base and the upper hoop are fastened by screwing with screws. A circular hole for clamping the light tube is assembled between the lower base and the upper hoop; The rotating seat body and the mounting seat body are connected by a ball joint, and the ball joint is arranged at the rotating Z-axis position of the rotating seat body.

2. The high-precision optical lens processing device according to claim 1, wherein: A movable seat body is arranged below the mounting seat body, a lifting seat body is arranged below the movable seat body, and a workbench is arranged below the lifting seat body. The workbench is fixed on the lathe frame. Among them, the mounting seat body is connected to the movable seat body through a ball screw pair and a slider rail moving pair in the Y-axis direction, the movable seat body is connected to the lifting seat body through a ball screw pair and a slider rail moving pair in the X-axis direction, and the lifting seat body is connected to the workbench through a lifting drive assembly.

3. The high-precision optical lens processing device according to claim 2, characterized in that: The lifting drive assembly includes a vertical screw rod. The vertical screw rod is threadedly connected to the workbench. The top end of the vertical screw rod is fixedly connected with a rotating handle. The bottom end of the vertical screw rod is connected to a transfer plate through a bearing. A guide rod is vertically fixedly connected to the transfer plate. The guide rod passes through a guide hole on the workbench and the top end is fixedly connected to the lifting seat body.

4. The high-precision optical lens processing device according to claim 1, wherein: The outer sleeve is threadedly connected to the outer end of the machine tool connecting seat; the outer end of the outer sleeve is the insertion end of the first inner sleeve, the outer end of the first inner sleeve is the insertion end of the second inner sleeve, and the outer end of the second inner sleeve is the tooling insertion end of the mirror group to be measured.

5. The high-precision optical lens processing device according to claim 1, characterized in that: An installation hole channel of the tooling is coaxially arranged inside the second inner sleeve. An elastic collet is coaxially fixedly connected to the installation hole channel. The elastic collet includes a collet base body. A plurality of arc-shaped collet pieces are circumferentially and evenly distributed on the collet base body. There is a gap between two adjacent collet pieces. The outer end sides of the collet pieces all have outer chamfers and are located on the locking hole channel at the outer end of the installation hole channel. The inner diameter of the locking hole channel is larger than the inner diameter of the installation hole channel and is provided with internal threads. A tightening nut is screwed on the internal threads. The inner end edge of the tightening nut presses against the outer chamfer to clamp the outer ends of a plurality of collet pieces, so as to clamp the clamping rod of the tooling inserted into the elastic collet. The outer end of the tooling is the installation position of the mirror group to be measured.

6. The high-precision optical lens processing device according to claim 1, wherein: The angle between two adjacent first screws and second screws is 45°.

7. The high-precision optical lens processing device according to claim 1, characterized in that: The circumferential axial positions of the first screws and the second screws on the outer sleeve are different; the first screws all abut against the outer peripheral part of the first inner sleeve far from the spherical end, and the second screws all abut against the outer peripheral part of the second inner sleeve far from the spherical end.

8. A working method of a high-precision optical lens processing device as described in any one of claims 1-7, characterized in that, Proceed as follows: (1) Turn on the autocollimator. When the light beam emitted by the electronic autocollimator is focused on the position where the center of curvature is located through the fixed-focus objective lens, the light beam is incident along the normal direction on the A surface of the sample of the mirror group to be measured and is reflected. The reflected light cross target is imaged on the CCD plane. After being processed by the computer, the cross target image is displayed on the display. If the cross target image cannot be displayed on the display, adjust the position adjustment mechanism of the autocollimator until the cross target image is displayed on the display. The adjustment principle is: The three-dimensional moving platform adjusts its position in the X-axis, Y-axis, and Z-axis directions. The rotating seat body drives the light pipe to rotate horizontally around the Z-axis. The rotation adjustment is divided into coarse adjustment and fine adjustment. The coarse adjustment is carried out by loosening and tightening the locking screw, and the rotating seat body rotates horizontally around the Z-axis relative to the mounting seat body; The fine adjustment is carried out by adjusting the differential heads on both sides, so that the rotating plate body rotates horizontally around the Z-axis relative to the rotating seat body. (2) Then rotate the main shaft of the lathe to measure the center deviation of the A surface of the sample. The cross target image forms a circle on the CCD plane. The center deviation value of the A surface of the sample is calculated by computer eccentricity. If the eccentricity value is within the designed range, no adjustment is required; if the eccentricity value is outside the designed range, adjust the optical axis alignment imaging mechanism until the eccentricity value of the A surface of the sample is within the designed range. The adjustment principle is: by adjusting the abutting degree of several first screws respectively, change the skew attitude of the first inner sleeve relative to the outer sleeve, and then further adjust the abutting degree of several second screws respectively on the basis of the attitude of the first inner sleeve to change the skew attitude of the second inner sleeve relative to the first inner sleeve; (3) After completing the adjustment of the A surface of the sample, change the position of the autocollimator so that the beam emitted by it is incident along the normal direction on the B surface of the sample and is reflected. The reflected light cross target also forms an image on the CCD plane. Similar to the adjustment steps of the A surface, adjust the eccentricity value of the B surface within the designed range. At this time, the optical axis of the lens of the lens is coaxial with the rotating main shaft of the lathe. Finally, the CNC horizontal lathe turns the lens holder of the lens group according to the designed value, including the outer circle and the front and rear end faces, to ensure the structural dimensions of the lens holder of the lens group and change the mechanical axis of the lens holder to make the optical axis of the lens of the lens coaxial with the outer circle of the lens holder.

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