A precise positioning mechanism for continuously variable magnification objective lens

Abstract

The invention provides a mechanism for accurately positioning the magnification of a continuously variable magnification objective lens, and belongs to the technical field of objective lens magnification calibration. The specific method of use is as follows: when the upper and lower fixed group lenses of the continuously variable magnification objective lens are fixed, a position sensor is installed on the internal moving group lens, the sensor may be a grating ruler or a magnetic ruler, but is not limited to the grating ruler or the magnetic ruler, the mechanism for accurately positioning the magnification of the continuously variable magnification objective lens comprises a fixed group component arranged on both the upper and lower sides of an objective lens barrel, the device tracks and calibrates the moving position of the internal moving group component when the fixed group component in the objective lens is fixed, performs actual testing, stores actual lens position data after error elimination, and in the next magnification process, the moving group component in the continuously variable magnification objective lens moves to the calibrated position, this positioning method has high precision and strong practicability, and has strong practicability and market application prospects.

Description

Technical Field

[0001] The invention belongs to the technical field of objective lens magnification calibration, and in particular relates to a continuous variable magnification objective lens magnification precision positioning mechanism. Background Art

[0002] The objective lens is a lens group composed of several lenses. The purpose of combined use is to overcome the imaging defects of a single lens and improve the optical quality of the objective lens. The magnification of the microscope mainly depends on the objective lens. The quality of the objective lens directly affects the image quality of the microscope. It is the main component that determines the resolution and image clarity of the microscope, so the correction of the objective lens is very important.

[0003] When a continuously zooming objective lens is zoomed, the zooming of the objective lens is achieved through the relative movement between the fixed lens group and the moving lens group. Due to the influence of mechanical processing and lens processing accuracy, when the fixed lens group moves to the theoretical data position, there will be a certain error between the actual magnification of the objective lens and the theoretical magnification, and the error of each lens processed in the same batch will be different. In products such as microscopes that use computer software for measurement or comparison microscopes that compare objects, the magnification of the objective lens is required to be highly accurate and highly consistent with the magnification of the same model lens. There are relatively strict requirements for the consistency of the magnification of each objective lens. Therefore, a continuous zoom objective lens magnification precision positioning mechanism is designed. Summary of the invention

[0004] The purpose of the present invention is to provide a precise positioning mechanism for the magnification of a continuously variable magnification objective lens, aiming to solve the problem that in the prior art, due to the influence of mechanical processing and lens processing accuracy, when the fixed group moves to the theoretical data position, there will be a certain error between the actual magnification of the objective lens and the theoretical magnification, and the error of each one of the same batch of processing will be different.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A specific method of using a mechanism for accurately positioning the magnification of a continuously variable magnification objective lens is as follows: when the upper and lower fixed group lenses of the continuously variable magnification objective lens are fixed, a position sensor is installed on the internal moving group lens, the sensor can be a grating ruler or a magnetic ruler, but is not limited to a grating ruler or a magnetic ruler, in the process of continuous magnification, only the moving group lens moves, and the magnification changes are generated, so we track the position change of the moving group lens, debug according to the design data and actual test data, read the position data of the moving group lens at each magnification through the position sensor connected to the moving group lens, and the receiving mechanism receives and stores it, so that the magnification can be accurately positioned through the received moving group position data. At the same time, the magnification consistency of multiple magnification changes is achieved, and its specific structure also includes an objective lens barrel, and the upper and lower sides of the objective lens barrel are both provided with fixed group components, and two groups of moving group components are movably connected in the objective lens barrel, and the left sides of the two groups of moving group components both penetrate the objective lens barrel and are connected with a distance-changing mechanism, and the right sides of the two groups of moving group components both penetrate the objective lens barrel and are connected with a distance-measuring mechanism, and the distance-measuring mechanism is electrically connected to an external computer or a single-chip microcomputer.

[0007] Preferably, the two groups of the pitch changing mechanisms are arranged symmetrically with each other, and each group of the pitch changing mechanisms includes a support plate, which is fixed to the top of the objective lens barrel, and a motor is arranged on the support plate. The output end of the motor passes through the support plate and is fixed with a lead screw, and a left connecting rod is fixed to the surface of the moving group assembly, and the left connecting rod passes through the objective lens barrel and extends outward, and the other end of the left connecting rod is fixed with an inclined plate, and a threaded sleeve is fixed in the inclined plate, and the threaded sleeve is threadedly connected to the lead screw.

[0008] Preferably, the two inclined plates have opposite inclination directions, and the two left connecting rods in the two groups of moving group components are respectively fixed to the two inclined plates in the two groups of variable pitch mechanisms.

[0009] Preferably, the distance measuring mechanism includes a grating ruler, which is arranged on the right side of the objective lens barrel. Two grating reading heads are arranged in the grating ruler, and the right sides of the two groups of moving group components are connected to the two grating reading heads through a right connecting rod.

[0010] Preferably, each group of the fixed group components includes a lens fixed group, and the lens fixed group is arranged on the top of the objective lens barrel, and the surface of the lens fixed group is fixed between the support frame and the objective lens barrel.

[0011] Preferably, each group of the moving group components includes a lens moving group, and the lens moving group is embedded in the objective lens barrel. A sliding frame is sleeved on the surface of the lens moving group, and the sliding frame is slidably connected to the circumferential inner wall of the objective lens barrel.

[0012] Preferably, a shift groove and a through groove are respectively formed on the left and right sides of the objective lens barrel, and two left connecting rods and a right connecting rod respectively penetrate the shift groove and the through groove.

[0013] Preferably, friction rubber is provided between the two left connecting rods and the shifting grooves and between the two right connecting rods and the passing grooves.

[0014] Preferably, the two motors in the two groups of the variable pitch mechanisms are electrically connected to an external motor controller.

[0015] The method of using the precise positioning mechanism of the continuous zoom objective lens magnification is as follows:

[0016] S1: First, the spacing between the two moving group components in the objective lens barrel or the distance between the two moving group components is changed by using the two sets of pitch-changing mechanisms on the left side of the objective lens barrel: the motor arranged on the support plate in the pitch-changing mechanism drives the lead screw fixed at its output end to rotate, so that the threaded sleeve threadedly connected to the surface of the lead screw drives the inclined plate and the moving group components connected by the left connecting rod to move up and down in the objective lens barrel, and the up and down movement of the two sets of moving group components can realize the magnification change of the entire objective lens;

[0017] S2: Then the precise position and spacing of the two moving group components in the objective tube are measured by the distance measuring mechanism on the right side of the objective tube: the two grating reading heads in the grating ruler in the distance measuring mechanism are connected to the two moving group components respectively through two right connecting rods. When the two moving group components move up and down, the grating reading heads are driven to move in the grating ruler through the right connecting rod, so as to measure the moving distance position of the two moving group components by the grating ruler;

[0018] S3: Use the software or single-chip microcomputer in the external computer to process the multiple data recorded by the grating ruler in step S as the magnification position coordinate data, and use the ruler coordinate data to achieve error-free magnification reset. The movement position calibration mechanism of the moving group component in the objective tube is connected to the position grating ruler, and the grating ruler obtains the absolute value position of each movement of the moving group. Each objective magnification we need to obtain, the movement of the moving group component in the objective, that is, the grating ruler position is used as the moving group coordinate for memory;

[0019] S4: When the objective lens needs to be adjusted to a preset magnification, the prepared magnification can be obtained by simply moving the two moving group components in the objective lens barrel to the coordinate position of the magnification obtained in step S.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In this scheme, the device uses the fixed group component in the objective lens to track and calibrate the moving position of the internal dynamic group component and conduct actual testing, and stores the actual lens position data after eliminating the error. During the next magnification process, the dynamic group component in the continuous magnification objective lens moves to the calibrated position. This positioning method has high accuracy and strong practicality, and has strong practicality and market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 An exploded view of the present invention;

[0025] Figure 3 For the present invention Figure 2 The second perspective diagram in ;

[0026] Figure 4 A top view of the present invention;

[0027] Figure 5 For the present invention Figure 4 Cross-sectional view at AA in the middle.

[0028] In the figure: 1. objective lens barrel; 2. lens fixed group; 3. support frame; 4. sliding frame; 5. lens moving group; 6. left connecting rod; 7. inclined plate; 8. threaded sleeve; 9. support plate; 10. motor; 11. lead screw; 12. right connecting rod; 13. grating reading head; 14. grating scale; 15. shifting groove; 16. threading groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-Figure 5The present invention provides the following technical solutions: A specific method of using a mechanism for accurately positioning the magnification of a continuously variable magnification objective lens is as follows: when the positions of the upper and lower fixed lens groups of the continuously variable magnification objective lens are fixed, a position sensor is installed on the internal moving lens group. The sensor can be a grating scale or a magnetic scale, but is not limited to a grating scale or a magnetic scale. During the continuous magnification change process, only the moving lens group moves, resulting in a change in magnification. Therefore, we track the position change of the moving lens group, debug according to the design data and actual test data, read the position data of the moving lens group at each magnification through the position sensor connected to the moving lens group, and the receiving mechanism receives and stores it. In this way, the magnification can be accurately positioned through the received moving lens group position data. At the same time, the magnification consistency of multiple magnification changes is achieved. Its specific structure also includes an objective lens barrel 1. Fixed group components are arranged on the upper and lower sides of the objective lens barrel 1. Two groups of moving group components are movably connected in the objective lens barrel 1. The left sides of the two groups of moving group components penetrate the objective lens barrel 1 and are connected to the distance changing mechanism. The right sides of the two groups of moving group components penetrate the objective lens barrel 1 and are connected to the distance measuring mechanism. The distance measuring mechanism is electrically connected to an external computer or a single-chip microcomputer.

[0032] In a specific embodiment of the present invention, two sets of variable distance mechanisms on the left side of the objective lens barrel 1 are used to change the spacing between the two sets of moving group components in the objective lens barrel 1 or the distance between the two sets of moving group components, and then the distance measuring mechanism on the right side of the objective lens barrel 1 is used to measure the precise position and spacing of the two sets of moving group components in the objective lens barrel 1, and the software or single-chip microcomputer in the external computer uses the multiple data recorded by the grating ruler 14 as the magnification position coordinate data. When the objective lens needs to be adjusted to a preset magnification, it is only necessary to move the two sets of moving group components in the objective lens barrel 1 to the coordinate position where the magnification is recorded to obtain the prepared magnification.

[0033] Specifically, the two sets of variable pitch mechanisms are symmetrically arranged, and each set of variable pitch mechanisms includes a support plate 9, which is fixed to the top of the objective lens barrel 1. A motor 10 is arranged on the support plate 9. The output end of the motor 10 passes through the support plate 9 and is fixed with a screw rod 11. A left connecting rod 6 is fixed to the surface of the moving group component, and the left connecting rod 6 passes through the objective lens barrel 1 and extends outward. The other end of the left connecting rod 6 is fixed with an inclined plate 7, and a threaded sleeve 8 is fixed in the inclined plate 7, and the threaded sleeve 8 is threadedly connected to the screw rod 11.

[0034] In the present embodiment, the motor 10 arranged on the support plate 9 in the pitch-changing mechanism drives the lead screw 11 fixed at its output end to rotate, so that the threaded sleeve 8 threadedly connected to the surface of the lead screw 11 drives the inclined plate 7 and the moving group assembly connected by the left connecting rod 6 to move up and down in the objective lens barrel 1. The up and down movement of the two groups of moving group assemblies can realize the magnification change of the entire objective lens.

[0035] Specifically, the two inclined plates 7 are inclined in opposite directions, and the two left connecting rods 6 in the two sets of moving group components are respectively fixed to the two inclined plates 7 in the two sets of variable pitch mechanisms.

[0036] In this embodiment, the two inclined plates 7 are arranged in opposite inclination directions and can be staggered, which improves the ingenuity and rationality of the overall structure of the device.

[0037] Specifically, the distance measuring mechanism includes a grating ruler 14 , which is arranged on the right side of the objective lens barrel 1 . Two grating reading heads 13 are arranged in the grating ruler 14 . The right sides of the two moving group components are connected to the two grating reading heads 13 through the right connecting rod 12 .

[0038] In this embodiment: two grating reading heads 13 in the grating scale 14 in the distance measuring mechanism are connected to the two groups of moving components through two right connecting rods 12 respectively. When the two groups of moving components move up and down, the grating reading heads 13 are driven by the right connecting rod 12 to move in the grating scale 14, so that the grating scale 14 is used to measure the distance position of the movement of the two groups of moving components.

[0039] Specifically, each fixed group component includes a lens fixed group 2 , which is arranged on the top of the objective lens barrel 1 , and the surface of the lens fixed group 2 is fixed to the objective lens barrel 1 through a support frame 3 .

[0040] In this embodiment: the support frame 3 in the fixed group component is used to connect the objective lens barrel 1 and the lens fixed group 2 and can also protect the lens fixed group 2.

[0041] Specifically, each moving group assembly includes a lens moving group 5 , which is embedded in the objective lens barrel 1 , and a sliding frame 4 is sleeved on the surface of the lens moving group 5 , and the sliding frame 4 is slidably connected to the circumferential inner wall of the objective lens barrel 1 .

[0042] In this embodiment: the sliding frame 4 in the moving group assembly can drive the wrapped lens moving group 5 to move up and down in the circumferential inner wall of the objective lens barrel 1.

[0043] Specifically, a shifting groove 15 and a through groove 16 are respectively formed on the left and right sides of the objective lens barrel 1 , and the two left connecting rods 6 and the right connecting rod 12 pass through the shifting groove 15 and the through groove 16 , respectively.

[0044] In this embodiment, the shifting groove 15 and the through groove 16 are used to connect the moving group assembly with the distance changing mechanism and the distance measuring mechanism on the left and right sides through the left connecting rod 6 and the right connecting rod 12 respectively.

[0045] Specifically, friction rubber is provided between the two left connecting rods 6 and the shifting grooves 15 and between the two right connecting rods 12 and the through grooves 16 .

[0046] In this embodiment, the friction rubbers arranged between the two left connecting rods 6 and the shifting grooves 15 and between the two right connecting rods 12 and the through grooves 16 can drive the moving group assembly to move up and down in the objective lens barrel 1 more stably through the variable distance mechanism.

[0047] Specifically, the two motors 10 in the two sets of pitch-changing mechanisms are electrically connected to an external motor controller.

[0048] In this embodiment: the two motors 10 in the two sets of variable pitch mechanisms are electrically connected to the external motor controller. The two motor controllers can be used to separately control the two motors 10 in the two sets of variable pitch mechanisms, so as to adjust the positions of the two sets of moving group components separately.

[0049] The method of using the precise positioning mechanism of the continuous zoom objective lens magnification is as follows:

[0050] S1: First, the spacing between the two moving group components in the objective lens barrel 1 or the distance between the two moving group components is changed by using the two sets of pitch-changing mechanisms on the left side of the objective lens barrel 1: the motor 10 arranged on the support plate 9 in the pitch-changing mechanism drives the screw rod 11 fixed at its output end to rotate, so that the threaded sleeve 8 threadedly connected to the surface of the screw rod 11 drives the inclined plate 7 and the moving group components connected by the left connecting rod 6 to move up and down in the objective lens barrel 1, and the up and down movement of the two sets of moving group components can realize the magnification change of the entire objective lens;

[0051] S2: Then the precise position and spacing of the two moving group components in the objective lens barrel 1 are measured by the distance measuring mechanism on the right side of the objective lens barrel 1: the two grating reading heads 13 in the grating ruler 14 in the distance measuring mechanism are connected to the two moving group components respectively through two right connecting rods 12. When the two moving group components move up and down, the grating reading heads 13 are driven by the right connecting rods 12 to move in the grating ruler 14, so that the distance position of the movement of the two moving group components is measured by the grating ruler 14;

[0052] S3: Use the software or single-chip microcomputer in the external computer to process the multiple data recorded by the grating ruler 14 in step S2 as the magnification position coordinate data, and use the ruler coordinate data to achieve error-free magnification reset. The movement position calibration mechanism of the moving group component in the objective tube 1 is connected to the position grating ruler 14. The grating ruler 14 obtains the absolute value position of each movement of the moving group, and each objective magnification we need to obtain, the movement of the moving group component in the objective, that is, the position of the grating ruler 14 is used as the moving group coordinate for memory;

[0053] S4: When the objective lens needs to be adjusted to a preset magnification, the prepared magnification can be obtained by simply moving the two moving group components in the objective lens barrel 1 to the coordinate position of the magnification obtained in step S3.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanism for accurately positioning a continuously variable magnification objective lens, characterized in that: The specific method of use is as follows: when the upper and lower fixed lens groups of the continuously variable magnification objective lens are fixed, a position sensor is installed on the internal moving lens group. The sensor is a grating ruler. During the continuous magnification change, only the moving lens group moves, resulting in a change in magnification. Therefore, we track the position change of the moving lens group, debug according to the design data and actual test data, read the position data of the moving lens group at each magnification through the position sensor connected to the moving lens group, and the receiving mechanism receives and stores it. In this way, the magnification can be accurately positioned through the received moving lens group position data, and the magnification consistency of multiple magnification changes can be achieved. The specific structure also includes an objective lens barrel (1), wherein the upper and lower sides of the objective lens barrel (1) are both provided with fixed lens group components, and two moving lens group components are movably connected inside the objective lens barrel (1). The left sides of the two moving lens group components are penetrated The moving group assembly passes through the objective lens barrel (1) and is connected to a distance-changing mechanism. The right sides of the two moving group assemblies both pass through the objective lens barrel (1) and are connected to a distance-measuring mechanism. The distance-measuring mechanism is electrically connected to an external computer or a single-chip computer. The two moving group assemblies are symmetrically arranged. Each moving group assemblies comprises a support plate (9). The support plate (9) is fixed to the top of the objective lens barrel (1). A motor (10) is arranged on the support plate (9). The output end of the motor (10) passes through the support plate (9) and is fixed to a lead screw (11). A left connecting rod (6) is fixed to the surface of the moving group assembly. The left connecting rod (6) passes through the objective lens barrel (1) and extends outward. An inclined plate (7) is fixed to the other end of the left connecting rod (6). A threaded sleeve (8) is fixed inside the inclined plate (7). The threaded sleeve (8) is threadedly connected to the lead screw (11).

2. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 1, characterized in that: The two inclined plates (7) are inclined in opposite directions, and the two left connecting rods (6) in the two sets of moving group components are respectively fixed to the two inclined plates (7) in the two sets of pitch-changing mechanisms.

3. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 2, characterized in that: The distance measuring mechanism comprises a grating ruler (14), the grating ruler (14) is arranged on the right side of the objective lens barrel (1), two grating reading heads (13) are arranged in the grating ruler (14), and the right sides of the two groups of moving group components are connected to the two grating reading heads (13) via a right connecting rod (12).

4. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 3, characterized in that: Each group of the fixed group components comprises a lens fixed group (2), the lens fixed group (2) is arranged on the top of the objective lens barrel (1), and the surface of the lens fixed group (2) is fixed between the support frame (3) and the objective lens barrel (1).

5. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 4, characterized in that: Each group of the moving group components comprises a lens moving group (5), the lens moving group (5) is embedded in the objective lens barrel (1), a sliding frame (4) is sleeved on the surface of the lens moving group (5), and the sliding frame (4) is slidably connected to the circumferential inner wall of the objective lens barrel (1).

6. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 5, characterized in that: The objective lens barrel (1) is provided with a shifting groove (15) and a through groove (16) on the left and right sides respectively, and the two left connecting rods (6) and the right connecting rod (12) respectively penetrate the shifting groove (15) and the through groove (16).

7. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 6, characterized in that: Friction rubber is provided between the two left connecting rods (6) and the shifting grooves (15) and between the two right connecting rods (12) and the penetration grooves (16).

8. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to claim 7, characterized in that: The two motors (10) in the two sets of pitch-changing mechanisms are both electrically connected to an external motor controller.

9. The mechanism for accurately positioning the magnification of a continuously variable magnification objective lens according to any one of claims 1 to 8, characterized in that: It also includes the method of using the precise positioning mechanism for the continuously variable magnification objective lens, and the specific steps are as follows: S1: First, the spacing between the two moving group components in the objective lens barrel (1) or the distance between the two moving group components are changed by using two sets of pitch-changing mechanisms on the left side of the objective lens barrel (1): the motor (10) arranged on the support plate (9) in the pitch-changing mechanism drives the lead screw (11) fixed at its output end to rotate, so that the threaded sleeve (8) threadedly connected to the surface of the lead screw (11) drives the inclined plate (7) and the moving group components connected by the left connecting rod (6) to move up and down in the objective lens barrel (1), and the up and down movement of the two sets of moving group components can realize the magnification change of the entire objective lens; S2: Then, the precise position and spacing of the two moving group components in the objective lens barrel (1) are measured by the distance measuring mechanism on the right side of the objective lens barrel (1): two grating reading heads (13) in the grating ruler (14) in the distance measuring mechanism are connected to the two moving group components through two right connecting rods (12), and when the two moving group components move up and down, the grating reading heads (13) are driven by the right connecting rod (12) to move in the grating ruler (14), so that the distance position of the two moving group components is measured by the grating ruler (14); S3: using software or a single-chip computer in an external computer to process the multiple data recorded by the grating ruler (14) in step S2 as magnification position coordinate data, and using the ruler coordinate data to achieve error-free magnification resetting. The movement position calibration mechanism of the moving group component in the objective lens barrel (1) is connected to the position grating ruler (14), and the grating ruler (14) obtains the absolute position of each movement of the moving group, and each objective lens magnification we need to obtain, the movement of the moving group component in the objective lens, that is, the position of the grating ruler (14) is memorized as the moving group coordinate; S4: When the objective lens needs to be adjusted to a preset magnification, the two moving group components in the objective lens barrel (1) only need to be moved to the coordinate position of the magnification obtained in step S3 to obtain the prepared magnification.

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