Reflection core shift detection device for single lens or lens group

Abstract

The utility model provides a reflection core shift detection device for a single lens or a lens group, and belongs to the field of advanced manufacturing. A single lens or lens group reflection core shift detection device comprises a detection light path system, and the detection light path system comprises a receiving target surface, a focusing lens group, a semi-reflecting and semi-transmitting beam splitter prism, a lens I, a lens II, a detected lens and a light source. A light source enters from one side of the semi-reflecting and semi-transmitting beam splitter prism, and the semi-reflecting and semi-transmitting beam splitter prism divides a light beam generated by the light source into a reflecting light path and a transmitting light path; the transmission light path is emitted to the detected lens through the lens I and the lens II in sequence, and the lens I and the lens II are respectively vertical to the optical axis of the transmission light path; the reflection light path is emitted to the receiving target surface through the focusing lens group, and the focusing lens group is perpendicular to the optical axis of the reflection light path. The reflection core shift detection device for the single lens or the lens group can simultaneously detect the core shift of two surfaces of the lens or the lens group, is convenient and fast, and improves the detection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the advanced manufacturing field, concretely relates to a single lens or lens group reflection deflection detection device. BACKGROUND

[0002] After years of technical development, in the lens deflection detection field, the market has many schemes. Among them, transmission deflection and reflection deflection become the mainstream method, which has a wide application in the processing and assembly of lenses, and develops into an indispensable production detection technology. The current mainstream reflection type deflection equipment can only detect the deflection of the single surface of the lens, and cannot detect the deflection of the double surfaces of the lens and the deflection between different surfaces of a group of lenses at the same time. In actual use, there are problems of complicated operation and low detection efficiency.

[0003] The Chinese patent with publication number CN216791590U discloses an optical lens deflection detection device, which includes a device body, the device body includes a base, a support assembly, a positioning groove and a notch. The utility model discloses a single lens or lens group reflection deflection detection device, which can place the optical lens to be detected in the positioning groove, and the notch formed in the groove edge can enable the operator to manually rotate the optical lens for detection. However, it can only detect the deflection of the single surface of the lens, and cannot detect the deflection of the double surfaces of the lens and the deflection between different surfaces of a group of lenses at the same time. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problems of the prior art, provides a novel single lens and lens group reflection deflection detection device based on optical principles, improves the detection efficiency, and can successfully detect the deflection of the two surfaces of the lens or lens group at the same time.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a single lens or lens group reflection deflection detection device, which includes a detection light path system, the detection light path system includes a receiving target surface, a focusing lens group, a half-reflecting half-transmitting beam splitter, a lens I, a lens II, a lens to be detected and a light source. The light source is incident from one side of the half-reflecting half-transmitting beam splitter, and the half-reflecting half-transmitting beam splitter divides the light beam generated by the light source into a reflection light path and a transmission light path. The transmission light path is sequentially emitted to the lens to be detected through the lens I and the lens II, and the lens I and the lens II are perpendicular to the optical axis of the transmission light path. The reflection light path is emitted to the receiving target surface through the focusing lens group, and the focusing lens group is perpendicular to the optical axis of the reflection light path.

[0006] Optionally, the lens I and the lens II are both convex mirrors with the same focal length, the lens II is processed into a central hole, and the diameter of the lens I is less than or equal to the central hole of the lens II.

[0007] Optionally, it also includes: a structural component that supports the detection optical path system, the structural component includes a collimating device base, the collimating device base includes a base, a column connected to the base, and structural member I, structural member II and a lens barrel connected to the column, the base fixes the inspected lens, the structural member I fixes the lens I, the structural member II fixes the lens II, and the lens barrel fixes the semi-reflective and semi-transparent dichroic prism, the focusing lens group and the receiving target surface.

[0008] Optionally, the structural member II includes an objective lens supporting arm II and a coaxial arm of a collimating device connected to the objective lens supporting arm II by a pin, and the objective lens supporting arm II includes a mounting base; a first through hole is provided inside the mounting base, and a supporting step is provided in the first through hole, and the edge position of the lens II is padded on the supporting step and its thickness is higher than the hole wall of the first through hole.

[0009] Optionally, the structural member I includes an objective lens supporting arm I, and a coaxial arm of a collimating device connected to the objective lens supporting arm I by a pin, the objective lens supporting arm I includes a lens holder and a lens pillar, a second through hole is provided on the lens holder, a groove is provided on the hole wall of the second through hole, a fastening threaded hole is provided in the groove, the lens pillar is connected to the groove by a fastening screw, a long strip hole, a card slot and a scale line are provided on the lens pillar, the fastening screw passes through the long strip hole, the long strip hole is used for parallel light to pass through, the card slot is located at the front end of the lens pillar, for clamping the edge of the lens 1, and the scale line is provided on the side of the lens pillar, for adjusting the center of the lens I to be coaxial with the optical axis.

[0010] Optionally, the number of the grooves is at least 3, and the angles between every two grooves are equal.

[0011] Optionally, the coaxial arm of the collimation device is connected to the column via the pin.

[0012] Optionally, the receiving target surface, the focusing lens group, and the semi-reflective and semi-transparent beam splitting prism are placed in the lens barrel in sequence, and the semi-reflective and semi-transparent beam splitting prism is at 45° to the axis of the lens barrel.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The utility model discloses a device for detecting reflective deflection of a single lens or a lens group, which is easy to operate. The light source is deflected by 45 degrees by a semi-reflective and semi-transparent beam splitter prism, achieving a 90-degree deflection of the light path and refraction through lens I. The focused light passes through the center hole of lens II and is reflected from one surface of the lens being inspected. The reflected light passes through the center hole of lens II and lens I in sequence, becoming parallel light. The reflected light from the other surface passes through the edge area of ​​lens II, becoming parallel light. The two parallel light beams pass through the focusing lens group and simultaneously display two light spots at a receiving target surface. By comparing the actual position of the light spot with the coordinate (0,0), the degree of deflection can be calculated. The utility model discloses a device for detecting reflective deflection of a single lens or a lens group, which can simultaneously detect the deflection of two surfaces of a single lens or a lens group, which is convenient and fast, and improves detection efficiency.

[0015] In the utility model, lens I and lens II are respectively placed in structural member I and structural member II, and the distance between lens I and lens II is adjusted by structural member I and structural member II, so as to cooperate with the reference table of the collimating equipment to realize the center alignment of the optical axis of the detection light path. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 : Schematic diagram of the optical path scheme of a single lens or lens group reflective deflection detection device of the utility model;

[0018] Figure 2 : A schematic diagram of the structure of the reference platform of the collimation device of the utility model;

[0019] Figure 3 : A schematic structural diagram of the utility model structural member I;

[0020] Figure 4 : Schematic diagram of the structure of the utility model structural member II;

[0021] Figure 5 : Schematic diagram of lens I of the utility model;

[0022] Figure 6 : Schematic diagram of lens II of the utility model;

[0023] Figure 7 :The utility model simulates the result diagram of the core eccentricity being 0 through the lighttools software;

[0024] Figure 8:The utility model uses lighttools software to simulate the result of enlarging the actual eccentricity to 0.2 degrees;

[0025] Among them, 1. objective lens supporting arm I; 2. pin; 3. collimating device coaxial arm; 4. supporting step; 5. first through hole; 6. mounting base; 7. second through hole; 8. objective lens supporting arm II; 9. column; 10. lens bracket; 11. groove; 12. structural part I; 13. structural part II; 14 collimating device reference platform; 15. lens I; 16. lens II; 17. lens pillar; 18. fastening screw; 19. fastening threaded hole; 20. long strip hole; 21. card slot; 22. scale line; 23. light source; 24. semi-reflective and semi-transparent dichroic prism; 25. inspected lens; 26. focusing lens group; 27. receiving target surface; 28. lens barrel; 29. ​​base; 30. center hole. DETAILED DESCRIPTION

[0026] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments.

[0027] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] See also Figures 1-5 . It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the descriptions, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] This embodiment discloses a device for detecting reflective deflection of a single lens or a lens group. Figure 1 As shown, a single lens or lens group reflective eccentricity detection device includes a detection optical path system, which includes a receiving target surface 27, a focusing lens group 26, a semi-reflective and semi-transparent dichroic prism 24, lens I 15, lens II 16, a lens to be inspected 25 and a light source 23; the light source is incident from one side of the semi-reflective and semi-transparent dichroic prism 24, and the semi-reflective and semi-transparent dichroic prism 24 divides the light beam generated by the light source 23 into a reflected light path and a transmitted light path; the transmitted light path is emitted to the lens to be inspected 25 through lens I 15 and lens II 16 in sequence, and lens I 15 and lens II 16 are perpendicular to the optical axis of the transmitted light path; the reflected light path is emitted to the receiving target surface 27 through the focusing lens group 26, and the focusing lens group 26 is perpendicular to the optical axis of the reflected light path.

[0031] like Figure 1 As shown, the optical path includes a light source 23, a semi-reflective and semi-transmissive beam splitter prism 24, a lens I 15, a lens II 16, a lens to be inspected 25, a focusing lens group 26, and a receiving target surface 27. The front end of the focusing lens group 26 participates in forming a collimated optical path, and the rear end converges the parallel light onto the receiving target surface 27.

[0032] Lens I 15 and lens II 16 are both convex mirrors with the same focal length. Lens II 26 is processed with a central hole 30 . The diameter of lens I 15 is smaller than or equal to the central hole 30 of lens II 16 .

[0033] like Figures 1-4As shown, the utility model is simple to operate and easy to use. In actual work, the receiving target surface 27, the focusing lens group 26, the semi-reflective and semi-transparent dichroic prism 24, the lens I 15, the lens II 16 and the inspected lens 25 are arranged in sequence along the optical axis, and the light source 23 is parallel light and perpendicular to the optical axis. Specific detection steps: During detection, the inspected lens 25 is fixed on the base 29, and the lens I 15 and the lens II 16 are fixed on the column 9 through the pin 2 at a certain distance through the adjustment of the structural member I 12 and the structural member II 13. Then, the semi-reflective and semi-transparent dichroic prism 24 is used to perform a 45° deflection on the parallel light to achieve a 90° deflection of the light path. After the parallel light passes through the lens I 15, its light beam is refracted, and the converged light passes through the central hole 30 of the lens II 16, and no secondary refraction occurs, and is focused at the focal position reflected from the surface of the inspected lens 25. The light reflected from one surface of the inspected lens 25 will pass through the central hole 30 of lens II 16 and lens I 15 to become parallel light; the position of lens II 16 is calculated through the Gaussian object-image relationship, and the receiving target surface 27 will receive the reflected image of the other surface of the inspected lens 25 again. The light reflected from the other surface of the inspected lens 25 will pass through the edge area of ​​lens II 16 to become parallel light. Most of the parallel light will not be refracted by lens I 15. After the two parallel light beams pass through the focusing lens group 26, they will simultaneously display two light spots at different positions on the receiving target surface 27.

[0034] like Figure 1 and Figure 2 As shown, the structural assembly includes a collimating device reference platform 14, and the collimating device reference platform 14 includes a base 29, a column 9 connected to the base 39, and a structural member I12, a structural member II13 and a lens barrel 28 connected to the column 9. The base 29 fixes the inspected lens 25, the structural member I12 fixes the lens I15, the structural member II23 fixes the lens II26, and the lens barrel 28 fixes the semi-reflective and semi-transparent dichroic prism 24, the focusing lens group 26 and the receiving target surface 27; the receiving target surface 27, the focusing lens group 26, and the semi-reflective and semi-transparent dichroic prism 24 are placed in the lens barrel 28 in sequence, the semi-reflective and semi-transparent dichroic prism 24 is 45° to the axis of the lens barrel 28, and the receiving target surface 27, the focusing lens group 26, the lens I, the lens II and the inspected lens are coaxial with the optical axis.

[0035] like Figure 3 and Figure 4 As shown, structural member I12 is composed of objective lens supporting arm I1 and collimating device coaxial arm 3, structural member II13 is composed of objective lens supporting arm II8 and collimating device coaxial arm 3, the arms are connected by pin 2, a certain distance is maintained between structural member I12 and structural member II13, and they cooperate with the collimating device base platform 14 to realize the center alignment of the optical axis of the detection light path.

[0036] Exemplarily, the structural member I 12 is perpendicular to the column 9 ; the structural member II 13 is perpendicular to the column 9 .

[0037] likeFigure 3 and Figure 5 As shown, the objective lens supporting arm Ⅰ1 includes a lens holder 10 and a lens pillar 17. A second through hole 7 is provided on the lens holder 10 and a groove 11 is provided on the inner wall of the second through hole 7. The number of the grooves 11 is at least 3, and the angles between every two grooves 11 are equal. A fastening threaded hole 19 is provided in the groove 11. The lens pillar 17 is provided with a long strip hole 20, a card groove 21 and a scale line 22; the lens pillar 17 and the groove 11 are detachably connected by a fastening screw 18, and the fastening screw 18 passes through the long strip hole 20. The card groove 21 is located at the front end of the lens pillar and is used to clamp the edge of the lens Ⅰ15; the scale line 22 is provided on the side of the lens pillar and is used to adjust the center of the lens Ⅰ15 to be coaxial with the optical axis.

[0038] like Figure 4 and Figure 6 As shown, the inner wall of the mounting base 6 of the objective lens support arm II 8 is provided with a first through hole 5. The first through hole 5 is circular, and the lens II 16 is placed in the first through hole 5. The thickness of the lens II 16 is higher than the wall of the first through hole 5; the lens II 16 can be placed in the first through hole 5. The support step 4 in the groove allows the edge of the lens II 16 to be cushioned on the support step 4, so that the lens II 16 is suspended in the first through hole 5.

[0039] like Figure 7 and Figure 8 As shown, Figure 7 、 Figure 8 is the simulation result, Figure 7 The result of eccentricity being 0 is: Figure 8 This is the result of magnifying the actual eccentricity to 0.2 degrees; the utility model can successfully realize the simultaneous detection of the eccentricity of two surfaces of a lens or a lens group.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for detecting reflective core deflection of a single lens or a lens group, characterized by: The invention comprises a detection optical path system, which includes a receiving target surface, a focusing lens group, a semi-reflective and semi-transparent beam splitter prism, a lens I, a lens II, a lens to be inspected, and a light source; the light source is incident from one side of the semi-reflective and semi-transparent beam splitter prism, and the semi-reflective and semi-transparent beam splitter prism divides the light beam generated by the light source into a reflected light path and a transmitted light path; the transmitted light path sequentially exits through the lens I and the lens II to the lens to be inspected, and the lens I and the lens II are respectively perpendicular to the optical axis of the transmitted light path; The reflected light path is emitted to the receiving target surface through the focusing lens group, and the focusing lens group is perpendicular to the optical axis of the reflected light path.

2. A reflective deflection detection device for a single lens or a lens group according to claim 1, characterized in that: The lens I and the lens II are both convex mirrors with the same focal length. A central hole is machined in the lens II, and the diameter of the lens I is smaller than or equal to the central hole of the lens II.

3. A reflective deflection detection device for a single lens or a lens group according to claim 2, characterized in that: Also includes: The structural component that carries the detection optical path system includes a collimating device base, and the collimating device base includes a base, a column connected to the base, and structural member I, structural member II and a lens barrel connected to the column. The base fixes the inspected lens, the structural member I fixes the lens I, the structural member II fixes the lens II, and the lens barrel fixes the semi-reflective and semi-transparent dichroic prism, the focusing lens group and the receiving target surface.

4. A device for detecting reflective deflection of a single lens or a lens group according to claim 3, characterized in that: The structural part II includes an objective lens supporting arm II and a coaxial arm of a collimating device connected to the objective lens supporting arm II by a pin. The objective lens supporting arm II includes a mounting base. A first through hole is provided inside the mounting base, and a supporting step is provided in the first through hole. The edge position of the lens II is padded on the supporting step and its thickness is higher than the hole wall of the first through hole.

5. The device for detecting reflective core deflection of a single lens or a lens group according to claim 3, wherein: The structural part I includes an objective lens supporting arm I and a coaxial arm of a collimating device connected to the objective lens supporting arm I by a pin. The objective lens supporting arm I includes a lens holder and a lens pillar. A second through hole is provided on the lens holder, and a groove is provided on the hole wall of the second through hole. A fastening threaded hole is provided in the groove. The lens pillar is connected to the groove by a fastening screw. A long strip hole, a card slot and a scale line are provided on the lens pillar. The fastening screw passes through the long strip hole. The long strip hole is used for parallel light to pass through. The card slot is located at the front end of the lens pillar and is used to clamp the edge of the lens 1. The scale line is provided on the side of the lens pillar and is used to adjust the center of the lens I to be coaxial with the optical axis.

6. A reflective deflection detection device for a single lens or a lens group according to claim 5, characterized in that: The number of the grooves is at least 3, and the angles between every two grooves are equal.

7. The device for detecting reflective deflection of a single lens or a lens group according to claim 5, wherein: The coaxial arm of the collimating device is connected to the column through a pin.

8. The device for detecting reflective deflection of a single lens or a lens group according to claim 3, wherein: The receiving target surface, the focusing lens group, and the semi-reflective and semi-transparent beam splitting prism are placed in the lens barrel in sequence, and the semi-reflective and semi-transparent beam splitting prism is at a 45° angle to the axis of the lens barrel.

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