A focal plane measuring device for an optical path system

Abstract

The invention relates to the field of focal plane measurement of an optical path system, and in particular to a focal plane measurement device for an optical path system, comprising an operating table, wherein two symmetrical arc plates are arranged above the operating table, the arc openings of the upper and lower arc plates are arranged opposite to each other, and the ends of the upper and lower arc plates extend horizontally outwards; in the optical path system focal plane measurement device designed by the invention, during the process of placing and positioning a convex lens, the convex lens only needs to be placed in the arc plate below, and subsequently, through the cooperation of the arc plate and a push rod, the main optical axis of the convex lens can be easily parallel to the surface of the operating table, the structure is simple, and the operation is convenient; at the same time, the upper and lower arc plates move relatively synchronously, and the main optical axis of each convex lens can be aligned with the center position of a detection end face of a sensor, so that the focusing point of light after passing through the convex lens can accurately fall on the center position of the detection end face of the sensor, which is helpful to improve the accuracy of light brightness detection, thereby improving the accuracy of focal plane distance measurement of the convex lens.

Description

Technical Field

[0001] The invention relates to the field of optical path system focal plane measurement, in particular to an optical path system focal plane measurement device. Background Art

[0002] In the optical system design stage, accurate focal plane distance measurement is the key to ensure that the system performance reaches the expected goal. For example, for farsighted glasses, camera lenses, telescopes and microscopes, the accuracy of focal length directly affects the image quality and resolution;

[0003] Convex lenses are used in fields that require optical lenses, such as farsighted glasses, camera lenses, telescopes, and microscopes. After the convex lenses are produced, they need to be sampled and measured to measure indicators such as thickness, transparency, focus, and focal plane.

[0004] The focal plane is a plane perpendicular to the principal optical axis of the convex lens and passes through the focal plane of the lens. The focus is the point where the light converges. When performing random measurement on the convex lens, the principal optical axis of the convex lens needs to be parallel to the incident light. At present, the convex lens is generally placed perpendicular to the ground, and the incident light is parallel to the ground. Only then can the incident light be irradiated onto the convex lens in a manner parallel to the principal optical axis of the convex lens.

[0005] Convex lens products have various specifications and sizes. When measuring the focal plane distance of each convex lens, current devices or equipment are difficult to quickly install and position the convex lens. That is, the main optical axis of the convex lens is difficult to be parallel to the incident light, resulting in the failure to accurately identify the point where the incident light converges through the convex lens, affecting the measurement accuracy of the focal plane.

[0006] Therefore, in order to solve the above problems, a focal plane measuring device for an optical path system is proposed. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows: the optical path system focal plane measuring device of the present invention comprises an operating table, two symmetrical arc plates are arranged above the operating table, the arc openings of the upper and lower arc plates are arranged opposite to each other, the ends of the upper and lower arc plates extend horizontally outward, and the ends of the upper and lower arc plates are both threadedly connected with screws;

[0009] One side of the arc-shaped plate is provided with a No. 1 motor connected to the operating table through a fixing frame, the output end of the No. 1 motor is fixedly connected to a No. 1 screw rod, a disc body is threadedly connected to the No. 1 screw rod, a plurality of push rods are fixedly connected to the eccentric position of the disc body, one end of the push rod points to the arc-shaped plate, and the other end of the push rod is slidably connected to the housing of the No. 1 motor; a plurality of light sources are also provided on the surface of the disc body opposite to the arc-shaped plate;

[0010] The other side of the arc plate is provided with a No. 2 motor connected to the operating table through a movable frame, the output end of the No. 2 motor is fixedly connected with a No. 2 screw rod, the No. 2 screw rod is threadedly connected with a disk body, a plurality of push rods are fixedly connected at eccentric positions on the disk body, one end of the push rod points to the arc plate, and the other end of the push rod is slidably connected to the housing of the No. 2 motor;

[0011] A sensor for detecting light brightness is provided at the end of the second screw rod, the housing of the sensor is rotatably connected to the end of the second screw rod, and limit rods are symmetrically fixedly connected to the two sides of the housing of the sensor, and the limit rods are slidably connected to the top rod;

[0012] The upper surface of the operating table is provided with a rectangular groove for the movable frame to reciprocate, and an adjusting screw rod is arranged in the rectangular groove. The adjusting screw rod is threadedly connected to the lower end of the movable frame, and a motor is arranged at the end of the adjusting screw rod, and the motor is used to drive the adjusting screw rod to rotate forward and reverse.

[0013] Preferably, each of the screw rods is rotatably connected to a support block, a slide groove is provided on the upper surface of the support block, the slide groove is arranged along the length direction of the operating table, a support rod is slidably connected in the slide groove, and the end of the support rod is horizontally fixed to the outer ring of the disk body on one side of the arc plate.

[0014] Preferably, restraint plates are provided on both side walls of the lower arc-shaped plate, and the restraint plates are arranged along the arc-shaped edge of the arc-shaped plate.

[0015] Preferably, two arc-shaped spring pieces are symmetrically provided on the top surface of the upper arc-shaped plate, and two arc-shaped spring pieces are symmetrically provided on the bottom surface of the lower arc-shaped plate.

[0016] Preferably, a notch is formed at the end of each of the spring sheets, and each notch is arranged in an isosceles trapezoidal shape.

[0017] Preferably, each of the screw rods comprises two upper and lower rod bodies, the lower end of the upper rod body is provided with a plug-in portion, the upper end of the lower rod body is provided with a plug-in groove adapted to the plug-in portion, a protrusion is provided on the outer wall of the plug-in portion, and a groove adapted to the protrusion is provided on the inner wall of the plug-in groove.

[0018] Preferably, a locking assembly is provided on the upper surface of the end of the arc-shaped plate above, and the locking assembly includes a base block fixedly connected to the end of the arc-shaped plate, a rotating hole is provided in the middle position of the base block, a connecting screw is rotated in the rotating hole, guide grooves are provided on both sides of the rotating hole, the middle position of the guide groove is connected to the rotating hole, and the guide groove passes through the base block along the length direction of the operating table, and rectangular frames are provided in two adjacent guide grooves, and the thickness of the side plate in the middle position in the length direction of the rectangular frame is less than the thickness of the side plates on both sides of the rectangular frame in the length direction.

[0019] Preferably, arc-shaped grooves are provided on the inner walls on both sides of the side plates in the length direction of each rectangular frame.

[0020] Preferably, the back side of the fixing frame is connected to the operating table via reinforcing ribs.

[0021] Preferably, the end of each push rod opposite to the arc-shaped plate is rotatably connected with a hemispherical rubber head.

[0022] The present invention is beneficial in that:

[0023] 1. In the present invention, the focal plane measuring device of the optical path system is designed. During the process of placing and positioning the convex lens, it is only necessary to place the convex lens in the arc plate below. Subsequently, through the cooperation of the arc plate and the top rod, the main optical axis of the convex lens can be easily parallel to the surface of the operating table. The structure is simple and the operation is convenient. At the same time, the upper and lower arc plates move relatively synchronously, and the main optical axis of each convex lens can be aligned with the center position of the detection end face of the sensor, so that the focusing point of the light after passing through the convex lens can accurately fall into the center position of the detection end face of the sensor, which helps to improve the accuracy of light brightness detection, thereby improving the focal plane distance measurement accuracy of the convex lens.

[0024] 2. In the present invention, the screw rod is divided into two rod bodies, an upper rod body and an lower rod body. When placing a convex lens, the upper arc plate together with the connected upper rod body is removed, and the plug-in portion is disengaged from the plug-in groove. At this time, the lower arc plate is completely exposed, and then the convex lens is placed in the placement groove, or mounted in the notch on the spring sheet, so that a convex lens with a larger diameter can be conveniently placed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a first visual stereogram of the focal plane measuring device of the optical path system of the present invention;

[0026] Figure 2 A second visual stereogram of the optical path system focal plane measuring device of the present invention;

[0027] Figure 3 It is a side view of the focal plane measuring device of the optical path system in the present invention;

[0028] Figure 4 A top view of the focal plane measuring device of the optical path system of the present invention;

[0029] Figure 5 It is a schematic diagram of the coordination between light and sensor in the present invention;

[0030] Figure 6 It is a three-dimensional diagram of the cooperation between the fixing frame and the No. 1 motor in the present invention;

[0031] Figure 7 It is a three-dimensional diagram of the coordination between the movable frame and the second motor in the present invention;

[0032] Figure 8 It is a three-dimensional diagram of the coordination between the spring piece and the arc plate in the present invention;

[0033] Fig. 9 It is a schematic diagram of the cooperation between the screw rod and the arc plate in the present invention;

[0034] Fig.10 It is a three-dimensional diagram of the cooperation between the screw rod and the base block in the present invention;

[0035] Fig.11 It is a schematic diagram of the cooperation between the rectangular frame and the screw rod in the present invention;

[0036] Fig.12 is a three-dimensional diagram of a rectangular frame in the present invention;

[0037] Fig.13 is a stereogram of the screw in the present invention;

[0038] Fig.14 It is a three-dimensional diagram of the plug-in portion of the present invention;

[0039] Fig.15 A bottom view of the plug-in portion of the present invention;

[0040] Fig.16 A three-dimensional diagram of the plug slot in the present invention;

[0041] Fig.17 It is a top view of the plug slot in the present invention.

[0042] In the figure: 101, convex lens; 1, operating table; 2, arc plate; 3, screw; 4, fixed frame; 5, No. 1 motor; 6, No. 1 screw; 7, disk body; 8, push rod; 9, movable frame; 10, No. 2 motor; 11, No. 2 screw; 12, sensor; 13, limit rod; 14, rectangular groove; 15, adjusting screw; 16, light source; 17, support block; 18, slide groove; 19, support rod; 20, constraint plate; 21, spring piece; 22, notch; 23, rod body; 24, plug-in part; 25, plug-in groove; 26, protrusion; 27, groove; 28, base block; 29, rotating hole; 30, guide groove; 31, rectangular frame; 32, arc groove; 33, reinforcing rib; 34, rubber head. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] Reference Figure 1 - Figure 7 , a focal plane measuring device for an optical path system, comprising an operating table 1, two symmetrical arc plates 2 are arranged above the operating table 1, the arc openings of the upper and lower arc plates 2 are arranged opposite to each other, the ends of the upper and lower arc plates 2 extend horizontally outward, and the ends of the upper and lower arc plates 2 are both threadedly connected with screws 3;

[0045] A motor No. 5 connected to the operating table 1 through a fixing frame 4 is provided on one side of the arc plate 2, a screw No. 6 is fixedly connected to the output end of the motor No. 5, a disk body 7 is threadedly connected to the screw No. 6, a plurality of push rods 8 are fixedly connected to the disk body 7 at an eccentric position, one end of the push rods 8 points to the arc plate 2, and the other end of the push rods 8 is slidably connected to the housing of the motor No. 5; a plurality of light sources 16 are also provided on the surface of the disk body 7 opposite to the arc plate 2;

[0046] The other side of the arc plate 2 is provided with a No. 2 motor 10 connected to the operating table 1 through a movable frame 9, the output end of the No. 2 motor 10 is fixedly connected to a No. 2 screw rod 11, the No. 2 screw rod 11 is threadedly connected to a disk body 7, and a plurality of push rods 8 are fixedly connected to the eccentric position of the disk body 7, one end of the push rod 8 points to the arc plate 2, and the other end of the push rod 8 is slidably connected to the housing of the No. 2 motor 10;

[0047] The end of the second screw rod 11 is provided with a sensor 12 for detecting light brightness, the housing of the sensor 12 is rotatably connected to the end of the second screw rod 11, and the housing of the sensor 12 is symmetrically fixed with limit rods 13 on both sides, and the limit rods 13 are slidably connected to the top rod 8;

[0048] In this embodiment, a rectangular groove 14 is provided at the other side of the upper surface of the operating table 1, that is, below the other side of the arc plate 2, for the movable frame 9 to reciprocate. An adjusting screw rod 15 is provided in the rectangular groove 14. The adjusting screw rod 15 is threadedly connected to the lower end of the movable frame 9. A motor is provided at the end of the adjusting screw rod 15, and the motor can drive the adjusting screw rod 15 to rotate forward and reverse.

[0049] The lower end of the screw 3 is provided with a motor capable of driving it to rotate forward and reversely. The direction of the thread on the upper half of the screw 3 is opposite to the direction of the thread on the lower half of the screw.

[0050] The multiple light sources 16 designed in this embodiment are all laser spotlights, and are arranged in a circular array on the disc body 7 connected to the first screw rod 6. The light emitted by the laser spotlight is parallel to the upper surface of the operating table 1;

[0051] In this embodiment, the arc plate 2 is arranged in the middle of the operating table 1, and a zero scale line is arranged on the surface of the middle of the operating table 1, and numerical values ​​are marked in sequence toward the other side of the operating table 1, and the numerical values ​​are arranged in increasing sequence; in the initial state, the top rods 8 on both sides of the arc plate 2 are arranged symmetrically;

[0052] The specific operation process of the optical path system focal plane measurement device is as follows:

[0053] Step 1, placing the convex lens 101, at this time the focal plane measuring device of the optical path system is in the initial state, placing the convex lens 101 between the upper and lower arc plates 2, and then driving the motor, the motor drives the screw 3 to rotate, the screw 3 synchronously drives the upper and lower arc plates 2 to approach each other, and drives the No. 1 motor 5 and the No. 2 motor 10 at the same time, the No. 1 motor 5 drives the connected disk 7 to move toward the convex lens 101 through the No. 1 screw 6, and the No. 2 motor 10 drives the connected disk 7 to move toward the convex lens 101 through the No. 2 screw 11. At this time, the disks 7 on both sides of the arc plate 2 synchronously drive the push rod 8 to squeeze the surface of the convex lens 101, so that the main optical axis of the convex lens 101 is parallel to the operating table 1, so that the main optical axis of the convex lens 101 is parallel to the light emitted by the laser spotlight, and at the same time the push rod 8 squeezes the convex lens 101 in the middle position of the operating table 1, that is, the convex lens 101 is at the zero scale position, and then the No. 1 motor 5 and the No. 2 motor 10 are reversed, and the push rod 8 is reset and withdraws from the convex lens 101;

[0054] Step 2: Measure the focal plane of the convex lens 101, drive the laser spotlight, and illuminate one side of the convex lens 101 in a state parallel to the surface of the operating table 1. The light passes through the other side of the convex lens 101 and is concentrated at one point, which is the focus. The focal plane passes through the focus and is perpendicular to the main optical axis. The focus is formed by the convergence of multiple light rays and has a higher brightness.

[0055] Then the driving motor drives the adjusting screw 15 to rotate, and the adjusting screw 15 drives the movable frame 9 to move in the rectangular groove 14. At the same time, the sensor 12 for detecting the brightness collects the light irradiating its detection end at all times, and transmits the light intensity information to the background processor, which converts the information into visual numbers, and then compares the data. The brightness value is the largest, and the corresponding scale line is found on the operating table 1. The value marked on the scale line is the focal plane distance of the convex lens 101.

[0056] Step 3: Remove and reset, drive the motor to reverse, the upper and lower arc plates 2 move away from each other, and no longer squeeze the convex lens 101, then the convex lens 101 can be removed, and then drive the motor to drive the adjusting screw 15 to rotate, so that the top rods 8 on the two disks 7 are symmetrically placed on both sides of the arc plate 2;

[0057] The focal plane measuring device of the optical path system designed in the present embodiment only needs to place the convex lens 101 in the arc plate 2 below during the placement and positioning process of the convex lens 101. Subsequently, through the cooperation of the arc plate 2 and the top rod 8, the main optical axis of the convex lens 101 can be easily parallel to the surface of the operating table 1. The structure is simple and the operation is convenient. At the same time, the upper and lower arc plates 2 move relatively synchronously, and the main optical axis of each convex lens 101 can be aligned with the center position of the detection end face of the sensor 12, so that the focusing point of the light after passing through the convex lens 101 can accurately fall into the center position of the detection end face of the sensor 12, which helps to improve the accuracy of light brightness detection, thereby improving the accuracy of focal plane distance measurement of the convex lens 101.

[0058] Reference Figure 1 - Fig.10 Each of the screw rods 3 is rotatably connected to a support block 17, and a slide groove 18 is provided on the upper surface of the support block 17. The slide groove 18 is arranged along the length direction of the operating table 1. A support rod 19 is slidably connected in the slide groove 18, and the end of the support rod 19 is horizontally fixed to the outer ring of the disk body 7 on one side of the arc plate 2;

[0059] Considering that the movable frame 9 will vibrate when sliding along the rectangular groove 14, and the vibration causes the detection end face of the sensor 12 to tilt, so that the light cannot be concentrated on the middle position of the detection end face, affecting the accuracy of light brightness detection. Figure 5 Among the three cases, Figure 5 a in the figure is the optimal state of the detection end surface of the sensor 12. Figure 5 b and c in the figure are the states of the vibration tilt of the detection end surface of the sensor 12; in order to reduce the vibration of the movable frame 9, a support block 17 and a support rod 19 are provided to further constrain the second motor 10 and the movable frame 9, such as Figure 2 and Figure 3 As shown in the figure, the two sides of the disk body 7 on the right are fixed with support rods 19, and the support rods 19 slide along the slide grooves 18 on the support block 17. The support rods 19 and the support block 17 hold the disk body 7, which also holds up the second motor 10, improves the stability of the movement of the movable frame 9, thereby reducing the vibration generated by the movable frame 9 and further improving the accuracy of light brightness detection.

[0060] Reference Figure 1 - Fig.10 , the two side walls of the arc-shaped plate 2 below are provided with a restraining plate 20, and the restraining plate 20 is arranged along the arc-shaped edge of the arc-shaped plate 2;

[0061] Constraint plates 20 are set on both sides of the lower arc plate 2, and the constraint plates 20 and the arc plate 2 form a placement groove. When the convex lens 101 is placed, the convex lens 101 is located in the placement groove. The constraint plates 20 can constrain the inclination angle of the convex lens 101, so that after the convex lens 101 is placed in the placement groove, the convex lens 101 is released and the convex lens 101 can still be located in the placement groove to prevent the convex lens 101 from tilting too much and falling off the arc plate 2, thereby reducing the time for the detection personnel to support the placement of the convex lens 101, and also reducing the contact time between the detection personnel and the device, thereby improving safety.

[0062] Reference Figure 1 - Fig.10 , two arc-shaped spring pieces 21 are symmetrically arranged on the top surface of the upper arc-shaped plate 2, and two arc-shaped spring pieces 21 are symmetrically arranged on the inner bottom surface of the lower arc-shaped plate 2;

[0063] The spring pieces 21 of the upper and lower arc plates 2 are symmetrically arranged. When the convex lens 101 is placed, the upper and lower arc plates 2 are close to each other, and the convex lens 101 is squeezed and clamped by the spring pieces 21, which plays a role in buffering and protecting the convex lens 101, so as to prevent the outer edge of the convex lens 101 from being squeezed and cracked by the arc plates 2 and damaged.

[0064] Reference Figure 8 - Fig.10 , a notch 22 is formed at the end of each of the spring pieces 21, and each notch 22 is arranged in an isosceles trapezoidal shape;

[0065] The notch 22 is used to clamp the edge of the convex lens 101. When the convex lens 101 is placed on the lower arc plate 2, the edge of the convex lens 101 is stuck in the notch 22. At this time, the convex lens 101 can be clamped and stabilized, which is also a measure to prevent the convex lens 101 from tipping over and falling after being placed. The two measures of setting the constraint plates 20 on both sides of the lower arc plate 2 can be used as two embodiments. Later, in conjunction with the push rod 8, the main optical axis of the convex lens 101 can be parallel to the upper surface of the operating table 1.

[0066] Reference Fig.13 - Fig.17 Each of the screw rods 3 includes an upper and lower rod body 23, a plug-in portion 24 is provided at the lower end of the upper rod body 23, a plug-in slot 25 adapted to the plug-in portion 24 is provided at the upper end of the lower rod body 23, a protrusion 26 is provided on the outer wall of the plug-in portion 24, and a groove 27 adapted to the protrusion 26 is provided on the inner wall of the plug-in slot 25;

[0067] For some convex lenses 101 with larger diameters, the operating space is limited when placing them, and they are difficult to place. For this reason, the screw rod 3 is designed to be divided into an upper and lower rod body 23, and the threads on the outer circles of the upper and lower rod bodies 23 are set in opposite directions. When placing the convex lens 101, the upper arc plate 2 together with the connected upper rod body 23 is removed, and the plug-in portion 24 is disengaged from the plug-in groove 25. At this time, the lower arc plate 2 is completely exposed, and then the convex lens 101 is placed in the placement groove, or mounted in the notch 22 on the spring piece 21, so that the convex lens 101 with a larger diameter can be placed. After that, the plug-in portion 24 is inserted into the plug-in groove 25, and the upper rod body 23 is pressed hard so that the protrusion 26 is embedded in the groove 27 to ensure the firmness between the upper and lower adjacent rod bodies 23.

[0068] Reference Figure 8 - Fig.12 , a locking assembly is provided on the upper surface of the end of the arc-shaped plate 2 above, and the locking assembly includes a base block 28 fixed to the end of the arc-shaped plate 2, a rotary hole 29 is provided in the middle position of the base block 28, a screw rod 3 is rotated in the rotary hole 29, guide grooves 30 are provided on both sides of the rotary hole 29, the middle position of the guide groove 30 is connected with the rotary hole 29, and the guide groove 30 passes through the base block 28 along the length direction of the operating table 1, and a rectangular frame 31 is provided in two adjacent guide grooves 30, and the thickness of the middle position of the side plate in the length direction of the rectangular frame 31 is less than the thickness of the side plate on both sides of the length direction of the rectangular frame 31;

[0069] The locking assembly is used to constrain the rotation of the upper rod 23. After the upper arc plate 2 and the rod 23 are removed, the upper rod 23 is threadedly connected to the upper arc plate 2. If one of the upper rods 23 rotates, the lower ends of the rods on both sides of the upper arc plate 2 are uneven, that is, the two plug-in parts 24 are uneven. When the plug-in parts 24 are subsequently installed in the plug-in slots 25, they cannot be successfully installed. The two upper rods 23 need to be rotated and adjusted multiple times before the plug-in parts 24 can be smoothly inserted into the plug-in slots 25.

[0070] In view of the above situation, a locking assembly is provided. Before removing the upper arc plate 2 and the rod body 23, the rectangular frame 31 is pushed so that one side of the side plate in the length direction of the rectangular frame 31 is moved to a position opposite to the rotating hole 29. At this time, the side plate in the length direction of the rectangular frame 31 is pressed against the surface of the rod body 23, and the relative rotation constraint between the rod body 23 and the arc plate 2 is fixed, thereby ensuring the stability of the rod bodies 23 on both sides of the upper arc plate 2. When the upper rod body 23 is subsequently installed and reset, the plug-in portion 24 can be smoothly installed in the plug-in slot 25.

[0071] Reference Fig.12, each of the rectangular frames 31 is provided with arc grooves 32 on the inner walls of the side plates on both sides in the length direction; the arc grooves 32 are provided, when the side plates in the length direction of the rectangular frame 31 are pressed on the surface of the rod body 23, the surface of the upper rod body 23 is embedded in the arc grooves 32, and the rectangular frame 31 is further stabilized at this time, so that the rectangular frame 31 can be stable and immovable, the rectangular frame 31 is always pressed on the surface of the upper rod body 23, and at the same time, the arc grooves 32 are pressed and attached to the surface of the upper rod body 23 in a surface manner, which can also enhance the stability of the upper rod body 23.

[0072] Reference Figure 1 - Figure 4 The back of the fixing frame 4 is connected to the operating table 1 through the reinforcing ribs 33; by providing the reinforcing ribs 33, the stability of the fixing frame 4 is improved, and the stability of the light source 16 on the disk body 7 is also improved.

[0073] Reference Figure 1 - Figure 4 The end of each push rod 8 opposite to the arc plate 2 is rotatably connected with a hemispherical rubber head 34; by arranging the hemispherical rubber head 34 on the push rod 8, the surface of the convex lens 101 is protected to prevent the push rod 8 from scratching the surface of the convex lens 101 or squeezing and cracking the convex lens 101, thereby playing a role of buffer protection.

[0074] Working principle:

[0075] Step 1, place the convex lens 101. At this time, the focal plane measuring device of the optical path system is in the initial state. The convex lens 101 is placed between the upper and lower arc plates 2. The lower edge of the convex lens 101 is located in the notch 22 of the lower spring sheet 21. The convex lens 101 is clamped in advance, and then the motor is driven. The motor drives the screw 3 to rotate. The screw 3 synchronously drives the upper and lower arc plates 2 to approach each other, and drives the No. 1 motor 5 and the No. 2 motor 10 at the same time. The No. 1 motor 5 drives the connected disk 7 to move toward the convex lens 101 through the No. 1 screw rod 6, and the No. 2 screw rod 6 drives the connected disk 7 to move toward the convex lens 101. The motor 10 drives the connected disk 7 to move toward the convex lens 101 through the No. 2 screw rod 11. At this time, the disks 7 on both sides of the arc plate 2 synchronously drive the push rod 8 to press on the surface of the convex lens 101, so that the main optical axis of the convex lens 101 is parallel to the operating table 1, and the main optical axis of the convex lens 101 is parallel to the light emitted by the laser spotlight. At the same time, the push rod 8 squeezes the convex lens 101 in the middle position of the operating table 1, that is, the convex lens 101 is at the zero scale position, and then the No. 1 motor 5 and the No. 2 motor 10 are reversed, and the push rod 8 is reset and withdraws from the convex lens 101;

[0076] Step 2, measure the focal plane of the convex lens 101, drive the laser spotlight, the light emitted by the laser spotlight is irradiated on one side of the convex lens 101 in a state parallel to the surface of the operating table 1, and the light penetrates from the other side of the convex lens 101 and is concentrated at one point, then the driving motor drives the adjusting screw 15 to rotate, and the adjusting screw 15 drives the movable frame 9 to move in the rectangular groove 14, and at the same time, the sensor 12 for detecting the brightness collects the light irradiating its detection end at all times, and transmits the light intensity information to the background processor, and the background processor converts the information into visual numbers, and then compares the data, compares the brightness value with the maximum value, and finds the corresponding scale line on the operating table 1, and the value marked on the scale line is the focal plane distance of the convex lens 101;

[0077] Step three, remove and reset, drive the motor to reverse, the upper and lower arc plates 2 move away from each other, and no longer squeeze the convex lens 101, then the convex lens 101 can be removed, and then the drive motor drives the adjusting screw 15 to rotate, so that the top rods 8 on the two disks 7 are symmetrically placed on both sides of the arc plate 2.

[0078] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An optical path system focal plane measurement device, characterized in that: The operating table (1) comprises two symmetrical upper and lower arc-shaped plates (2) arranged above the operating table (1), the arc-shaped openings of the upper and lower arc-shaped plates (2) being arranged opposite to each other, the ends of the upper and lower arc-shaped plates (2) extending outward horizontally, and the ends of the upper and lower arc-shaped plates (2) being threadedly connected with screw rods (3); A first motor (5) connected to the operating table (1) via a fixing frame (4) is provided on one side of the arc-shaped plate (2); a first screw rod (6) is fixedly connected to the output end of the first motor (5); a disk body (7) is threadedly connected to the first screw rod (6); a plurality of push rods (8) are fixedly connected to the disk body (7) at eccentric positions; one end of the push rods (8) points to the arc-shaped plate (2); the other end of the push rods (8) is slidably connected to the outer shell of the first motor (5); a plurality of light sources (16) are also provided on the surface of the disk body (7) opposite to the arc-shaped plate (2); A second motor (10) connected to the operating table (1) through a movable frame (9) is provided on the other side of the arc plate (2); a second screw rod (11) is fixedly connected to the output end of the second motor (10); a disk body (7) is threadedly connected to the second screw rod (11); a plurality of push rods (8) are fixedly connected to the disk body (7) at eccentric positions; one end of the push rod (8) points to the arc plate (2); and the other end of the push rod (8) is slidably connected to the outer shell of the second motor (10); A sensor (12) for detecting light brightness is provided at the end of the second screw rod (11); the housing of the sensor (12) is rotatably connected to the end of the second screw rod (11); limit rods (13) are symmetrically fixedly connected to both sides of the housing of the sensor (12); and the limit rods (13) are slidably connected to the top rod (8); The upper surface of the operating table (1) is provided with a rectangular groove (14) for the movable frame (9) to reciprocate, an adjusting screw rod (15) is arranged in the rectangular groove (14), the adjusting screw rod (15) is threadedly connected to the lower end of the movable frame (9), and a motor is arranged at the end of the adjusting screw rod (15), and the motor is used to drive the adjusting screw rod (15) to rotate forward and reverse; Each of the screw rods (3) is rotatably connected to a support block (17), a slide groove (18) is provided on the upper surface of the support block (17), the slide groove (18) is arranged along the length direction of the operating table (1), a support rod (19) is slidably connected in the slide groove (18), and the end of the support rod (19) is horizontally fixed to the outer ring of the disk body (7) on one side of the arc plate (2); Constraint plates (20) are provided on both side walls of the lower arc-shaped plate (2), and the constraint plates (20) are arranged along the arc-shaped edge of the arc-shaped plate (2); Two arc-shaped spring pieces (21) are symmetrically arranged on the top surface of the upper arc-shaped plate (2), and two arc-shaped spring pieces (21) are symmetrically arranged on the bottom surface of the lower arc-shaped plate (2); A locking assembly is provided on the upper surface of the end of the arc plate (2) above, the locking assembly comprising a base block (28) fixedly connected to the end of the arc plate (2), a rotating hole (29) is provided in the middle of the base block (28), a connecting screw (3) is rotatably connected in the rotating hole (29), guide grooves (30) are provided on both sides of the rotating hole (29), the middle position of the guide groove (30) is connected to the rotating hole (29), and the guide groove (30) passes through the base block (28) along the length direction of the operating table (1), and rectangular frames (31) are provided in two adjacent guide grooves (30), and the thickness of the side plate in the middle position of the rectangular frame (31) in the length direction is less than the thickness of the side plate in the length direction of the rectangular frame (31).

2. The optical path system focal plane measuring device according to claim 1, characterized in that: A notch (22) is provided at the end of each of the spring sheets (21), and each notch (22) is arranged in an isosceles trapezoidal shape.

3. The optical path system focal plane measuring device according to claim 1, characterized in that: Each of the screw rods (3) comprises two upper and lower rod bodies (23); a plug-in portion (24) is provided at the lower end of the upper rod body (23); a plug-in groove (25) adapted to the plug-in portion (24) is provided at the upper end of the lower rod body (23); a protrusion (26) is provided on the outer wall of the plug-in portion (24); and a groove (27) adapted to the protrusion (26) is provided on the inner wall of the plug-in groove (25).

4. The optical path system focal plane measuring device according to claim 1, characterized in that: Each rectangular frame (31) has arc-shaped grooves (32) formed on the inner walls of the side plates on both sides in the length direction.

5. The optical path system focal plane measuring device according to claim 1, characterized in that: The back side of the fixing frame (4) is connected to the operating table (1) via reinforcing ribs (33).

6. The optical path system focal plane measuring device according to claim 1, characterized in that: The end of each push rod (8) opposite to the arc-shaped plate (2) is rotatably connected with a hemispherical rubber head (34).

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