High-efficiency detection equipment for surface shape of optical lens

Abstract

The utility model provides efficient detection equipment for the surface shape of an optical lens. The efficient detection equipment comprises a lens shifting mechanism, a turnover mechanism and two interferometers, the lens shifting mechanism comprises a back plate, a guide rail is arranged on the back plate in the distribution direction of the two interferometers, a sliding block is installed on the guide rail, a vertical sliding groove is formed in the sliding block, and a lifting rod is installed in the vertical sliding groove in a sliding mode. An inverted U-shaped guide groove is formed in the back plate; the top of the lifting rod is in rolling fit with the inner wall of the guide groove through a roller; two first vertical cylinders and two corresponding first lens adsorption pieces are fixedly arranged at the bottom of the lifting rod; the interferometer and the turnover mechanism on the left side are located on the moving path of the first lens adsorption piece on the left side; the turnover mechanism and the interferometer on the right side are located on the moving path of the first lens adsorption piece on the right side. According to the utility model, lenses on two different stations can be synchronously transferred at a time while the interferometer is used for performing surface shape detection on the lenses, so that the influence on the detection efficiency caused by introduction of the interferometer is made up.

Description

Technical Field

[0001] This utility model relates to the field of lens manufacturing equipment, and in particular to a high-efficiency detection device for the surface shape of optical lenses. Background Technology

[0002] With the development of smart technology, the demand for inspection of mobile phones and lens elements is increasing. Most existing optical lens inspection equipment uses optical inspection cameras placed above and below the lens's movement path to visually inspect the lens as it passes by. However, the detection accuracy of optical inspection cameras is limited, making it difficult to inspect the surface shape of the lens (i.e., the shape and curvature of the optical lens surface).

[0003] Interferometers can accurately detect the surface shape of a lens by observing the interference of light. However, because the light source and detection probe of existing interferometers are usually located on the same side of the lens, a single detection can only cover one side of the lens. If it is necessary to detect the other side of the lens, the lens must be flipped to a position that the detection probe can cover, thus limiting the detection efficiency.

[0004] Therefore, how to improve the detection efficiency when using an interferometer to inspect lenses has become a major problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this invention is to provide an efficient optical lens surface shape inspection device, which, while using an interferometer to inspect the appearance (surface shape) of the lens, can also, to a certain extent, compensate for the impact of introducing the interferometer on the inspection efficiency.

[0006] The technical solution to achieve the purpose of this utility model is: an efficient optical lens surface shape detection device, including a worktable, on which a lens shifting mechanism and a flipping mechanism are installed, and an interferometer is provided on the left and right sides of the flipping mechanism respectively;

[0007] The flipping mechanism includes a vertically arranged mounting bracket and a flipping cylinder mounted on the mounting bracket. The flipping cylinder is horizontally arranged, and a finger cylinder is installed at the end of the piston rod of the flipping cylinder. The two pneumatic grippers of the finger cylinder are arranged opposite each other.

[0008] The lens shifting mechanism includes a backplate frame mounted on the worktable and a backplate vertically fixed above the backplate frame; a guide rail is provided on the surface of the backplate facing the interferometers along the distribution direction of the two interferometers, a slider is slidably mounted on the guide rail, the slider is provided with a vertical groove, and a lifting rod is slidably mounted in the vertical groove; an inverted U-shaped guide groove is also provided on the backplate; the top of the lifting rod rolls with the inner wall of the guide groove through a roller; a crossbar is fixed at the bottom of the lifting rod, the crossbar is parallel to the guide rail, and two first vertical cylinders arranged left and right are mounted on the crossbar, and a first lens adsorption component is drivenly connected to the bottom end of each first vertical cylinder;

[0009] The interferometer on the left, the flipping mechanism, and the interferometer on the right are equidistant from left to right.

[0010] The distance between the two first lens adsorption elements is 1 / 2 of the distance between the two interferometers;

[0011] The interferometer and the flipping mechanism on the left are located on the moving path of the first lens adsorption component on the left.

[0012] The flipping mechanism and the interferometer on the right are located on the moving path of the first lens adsorption component on the right.

[0013] This invention not only enables the detection of the surface shape of both sides of a lens through two interferometers and a flipping mechanism between them, but also enables the synchronous transfer of lenses at two different workstations in one operation by using a lifting rod, a crossbar, and two first vertical cylinders to drive two first lens adsorption components to reciprocate along the guide groove. This compensates for the decrease in detection efficiency caused by introducing interferometers to detect the surface shape of the lens.

[0014] Furthermore, the worktable is equipped with a loading mechanism located to the left of the interferometer on the left. The loading mechanism includes a vertically rotatable shaft mounted on the worktable, a swing arm rotatably mounted on the shaft, a second vertical cylinder mounted at the front end of the swing arm, and a second lens adsorption component located below the second vertical cylinder and raised and lowered by the cylinder. The interferometer on the left is located on the moving path of the second lens adsorption component, and the shaft is driven to rotate by a drive mechanism. During operation, the lens to be tested can be transferred to the interferometer on the left through the loading mechanism, thus loading the interferometer.

[0015] Furthermore, the workbench is also equipped with a discharge mechanism, which is located to the right of the interferometer on the right side. The discharge mechanism has the same structure as the loading mechanism. The interferometer on the right side is located on the moving path of the second lens adsorption component of the discharge mechanism. The discharge mechanism is used to transfer the lens that has been inspected on both sides to the next processing step. Attached Figure Description

[0016] Figure 1 This is a top view of the high-efficiency optical lens surface shape detection device according to an embodiment of the present invention. The two arrows indicate the movement paths of the second lens adsorption component and the third lens adsorption component, respectively.

[0017] Figure 2 This is a three-dimensional structural diagram of the high-efficiency optical lens surface shape detection device described in this embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the crossbar, two first vertical cylinders and two first lens adsorption components described in this embodiment of the utility model. Detailed Implementation

[0019] The preferred embodiment of the optical lens surface shape high-efficiency detection device of this utility model is described in detail below with reference to the accompanying drawings.

[0020] Combination Figures 1-3 An efficient optical lens surface shape detection device includes a worktable 10, on which a lens shifting mechanism 20 and a flipping mechanism 50 are installed. An interferometer (30, 40) is provided on the left and right sides of the flipping mechanism 50 respectively.

[0021] The flipping mechanism 50 includes a vertically arranged mounting bracket 51 and a flipping cylinder 52 mounted on the mounting bracket 51. The flipping cylinder 52 is horizontally arranged, and a finger cylinder 53 is installed at the end of the piston rod of the flipping cylinder 52. The two pneumatic grippers 531 of the finger cylinder 53 are arranged opposite each other.

[0022] The lens shifting mechanism 20 includes a backplate frame 21 mounted on the worktable 10 and a backplate 22 vertically fixed above the backplate frame 21; a guide rail 23 is provided on the surface of the backplate 22 facing the interferometers (30, 40) along the distribution direction of the two interferometers (30, 40), a slider 24 is slidably mounted on the guide rail 23, the slider 24 is provided with a vertical groove, and a lifting rod 26 is slidably mounted in the vertical groove and can move up and down along the vertical groove; The back plate 22 is also provided with an inverted U-shaped guide groove 221; the top of the lifting rod 26 is rolled in cooperation with the inner wall of the guide groove 221 through rollers; a crossbar 27 is fixed at the bottom of the lifting rod 26, the crossbar 27 is parallel to the guide rail 23, and two first vertical cylinders (28, 29) are installed on the crossbar 27, which are arranged left and right. The bottom end of each first vertical cylinder (28, 29) is connected to a first lens adsorption component (281, 291).

[0023] The interferometer 30 on the left, the flipping mechanism 50, and the interferometer 40 on the right are equidistant from left to right.

[0024] The distance between the two first lens adsorption elements (28, 29) is 1 / 2 the distance between the two interferometers (30, 40);

[0025] The interferometer 30 and the flipping mechanism 50 on the left are located on the moving path of the first lens adsorption member 28 on the left.

[0026] The flipping mechanism 50 and the interferometer 40 on the right are located on the moving path of the first lens adsorption member 29 on the right.

[0027] During operation, when the roller is given power to move left and right, it reciprocates within the guide groove 221 under the guidance of the guide groove 221, driving the lifting rod 26, the crossbar 27, the two first vertical cylinders (28, 29), and the two first lens adsorption components (281, 291) to move synchronously. Because "the interferometer 30 on the left, the flipping mechanism 50, and the interferometer 40 on the right are equidistantly distributed from left to right; the distance between the two first lens adsorption components (281, 291) is half the distance between the two interferometers (30, 40)," and "the interferometer 30 on the left and the flipping mechanism 50 are located on the moving path of the first lens adsorption component 281 on the left; the flipping mechanism 50 and the interferometer 40 on the right are located on the moving path of the first lens adsorption component 291 on the right," this ensures... The roller of this invention has a first position and a second position during reciprocating rolling. In the first position, the two sets of first lens adsorption components (281, 291) are respectively located above the lens placement position of the interferometer 30 on the left and the lens placement position of the flipping mechanism 50. Then, the two first vertical cylinders (28, 29) drive the corresponding first lens adsorption components (281, 291) to move up and down to pick up the lens on the lens placement position below them. In the second position, the two sets of first lens adsorption components (281, 291) are respectively located above the lens placement position of the flipping mechanism 50 and the lens placement position of the interferometer 40 on the right. Then, the two first vertical cylinders (28, 29) drive the corresponding first lens adsorption components (281, 291) to move down to stably place the lens on the lens placement position below them, and then move up to return to their original positions, realizing the synchronous transfer of lenses on two different work positions in one operation.

[0028] The lens, which is transferred to the flipping mechanism 5, is clamped from the left and right sides by the two pneumatic grippers 531 of the finger cylinder 53, and flipped 180° by the flipping cylinder 52 to achieve the flipping effect.

[0029] Therefore, this invention not only uses an interferometer to inspect the appearance (surface shape) of both sides of the lens, but also enables the synchronous transfer of lenses from two different workstations at one time, thereby compensating for the decrease in inspection efficiency caused by introducing an interferometer to inspect the lens.

[0030] The interferometers (30, 40) used in this invention are purchased equipment and have a common existing structure. Therefore, the specific structure of the interferometers will not be described in detail.

[0031] Furthermore, such as Figure 1 and Figure 2As shown, the worktable 10 is equipped with a loading mechanism 60, which is located to the left of the interferometers (30, 40) on the left. The loading mechanism 60 includes a vertically rotatable shaft 61 mounted on the worktable 10, a swing arm 62 rotatably mounted on the shaft 61, a second vertical cylinder 63 mounted on the front end of the swing arm 62, and a second lens adsorption component located below the second vertical cylinder 63 and driven to move up and down by the second vertical cylinder 63. The interferometer 30 on the left is located on the moving path of the second lens adsorption component. The shaft 61 is driven to rotate by a drive mechanism (a conventional structure, not shown). During operation, the lens to be tested can be transferred to the interferometer 30 on the left through the loading mechanism 60, realizing automatic loading of the interferometer.

[0032] Furthermore, such as Figure 1 , Figure 2 As shown, the workbench 10 is also provided with a discharge mechanism 70, which is located to the right of the interferometers (30, 40) on the right side. The discharge mechanism 70 has the same structure as the loading mechanism 60. The interferometer 40 on the right side is located on the moving path of the second lens adsorption component 700 of the discharge mechanism 70. The discharge mechanism 70 is used to transfer the lens that has been inspected on both sides to the next processing step.

[0033] Since the feeding mechanism 60 and the discharging mechanism 70 have the same structure, that is, the assembly structure of the second lens adsorption component of the feeding mechanism 60 and its corresponding second vertical cylinder 63 is the same as the assembly structure of the third lens adsorption component 700 and its third vertical cylinder 73 of the discharging mechanism 70, the second lens adsorption component of the feeding mechanism 60 is not shown.

[0034] In the specific implementation process, such as Figure 2 , Figure 3 As shown, the first lens adsorption component (281, 291), the second lens adsorption component of the feeding mechanism 60, and the third lens adsorption component 700 of the discharging mechanism 70 of this utility model all achieve tight adsorption of the lens through a vacuum suction cup.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-efficiency optical lens surface shape inspection device, comprising a worktable, wherein a lens shifting mechanism and a flipping mechanism are mounted on the worktable, characterized in that: An interferometer is provided on each of the left and right sides of the flipping mechanism; The flipping mechanism includes a vertically arranged mounting bracket and a flipping cylinder mounted on the mounting bracket. The flipping cylinder is horizontally arranged, and a finger cylinder is installed at the end of the piston rod of the flipping cylinder. The two pneumatic grippers of the finger cylinder are arranged opposite each other. The lens shifting mechanism includes a backplate frame mounted on the worktable and a backplate vertically fixed above the backplate frame; a guide rail is provided on the surface of the backplate facing the interferometers along the distribution direction of the two interferometers, a slider is mounted on the guide rail, the slider has a vertical groove, and a lifting rod is slidably mounted in the vertical groove; an inverted U-shaped guide groove is also provided on the backplate; the top of the lifting rod rolls against the inner wall of the guide groove through a roller; a crossbar is fixed at the bottom of the lifting rod, the crossbar is parallel to the guide rail, and two first vertical cylinders are mounted on the crossbar, each of which is driven to a first lens adsorption component at its bottom end; The interferometer on the left, the flipping mechanism, and the interferometer on the right are equidistant from left to right. The distance between the two first lens adsorption elements is 1 / 2 of the distance between the two interferometers; The interferometer and the flipping mechanism on the left are located on the moving path of the first lens adsorption component on the left. The flipping mechanism and the interferometer on the right are located on the moving path of the first lens adsorption component on the right.

2. The high-efficiency optical lens surface shape detection device according to claim 1, characterized in that: The workbench is equipped with a feeding mechanism, which is located to the left of the interferometer on the left. The feeding mechanism includes a rotating shaft that is vertically rotatably mounted on the workbench, a swing arm that is rotatably mounted on the rotating shaft, a second vertical cylinder mounted at the front end of the swing arm, and a second lens adsorption component located below the second vertical cylinder and driven to move up and down by the second vertical cylinder. The interferometer on the left is located on the moving path of the second lens adsorption component, and the rotating shaft is driven to rotate by a drive mechanism.

3. The high-efficiency optical lens surface shape detection device according to claim 2, characterized in that: The workbench is also equipped with a discharge mechanism, which is located to the right of the interferometer. The discharge mechanism has the same structure as the loading mechanism, and the interferometer on the right is located on the moving path of the second lens adsorption component of the discharge mechanism.

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