Lensometer

Abstract

The embodiment of the utility model provides a lensometer. The lensometer comprises a transparent placing plate, a display device, a micro lens detection device and a lens detection device. The transparent placing plate is used for placing lenses and comprises at least two first areas; the display device is provided with a display area for displaying patterns; the micro-lens detection device is used for detecting parameters of the lens provided with the micro-lens; the lens detection device is used for detecting parameters of the lens. The display area and the transparent placement plate are arranged at an interval in the vertical direction, the micro lens detection device and the lens detection device are both located on the side, away from the display area, of the transparent placement plate and are arranged at an interval with the transparent placement plate, and one first area is arranged opposite to the detection area of one lens detection device; and the other first area is opposite to the detection area of one micro-lens detection device. The lensometer provided by the embodiment of the utility model is used for detecting different types of lenses, and is beneficial to realizing the detection function integration of the lenses and the micro lenses.

Description

Technical Field

[0001] The present application relates to the field of optical detection technology, and in particular to a focal meter. Background Art

[0002] The focal meter is used to detect the power parameters of eyeglass lenses, find the optical center, detect the power of finished lenses, etc.

[0003] In recent years, with the introduction of various eyeglass lenses with customized functions, such as adult progressive lenses, children's microlens defocus lenses, anti-fatigue lenses, etc., various specific parameters such as the distortion zone of the progressive lens, the astigmatism channel, the microlens defocus amount, etc., cannot be measured at one time by a single-function focal meter.

[0004] Therefore, a multifunctional lens meter is needed to test different types of eyeglass lenses. During the testing process, different types of eyeglass lenses need to be fixed and placed for measurement. Utility Model Content

[0005] In view of this, the embodiments of the present invention are intended to provide a focal meter that can be used to detect different types of eyeglass lenses.

[0006] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] The present invention provides a focal meter, which comprises:

[0008] A transparent placement plate, used for placing lenses, the transparent placement plate comprising at least two first areas, the first areas being used for being arranged opposite to the lenses;

[0009] A display device having a display area for displaying a pattern;

[0010] A microlens detection device, used to detect parameters of a lens provided with a microlens;

[0011] A lens detection device, used for detecting parameters of the lens;

[0012] The display area and the transparent placement plate are spaced apart in the vertical direction, the microlens detection device and the lens detection device are both located on the side of the transparent placement plate away from the display area and spaced apart from the transparent placement plate, one of the first areas is arranged opposite to a detection area of ​​the lens detection device, and another of the first areas is arranged opposite to a detection area of ​​the microlens detection device.

[0013] In some embodiments, the transparent placement plate includes a plate body and a plurality of support blocks. The support blocks are provided on a side of the plate body facing away from the display area, protrude in a direction away from the display area along the vertical direction, and are used to support the lenses. The plurality of support blocks are spaced apart from each other and arranged in a ring to form the first area.

[0014] In some embodiments, the lensometer further includes a movable fixing member. The movable fixing member is located on a side of the transparent placement plate facing away from the display area and can move relative to the transparent placement plate. The movable fixing member includes an avoidance state and a working state.

[0015] In the avoidance state, in a projection plane perpendicular to the vertical direction, the projection of the movable fixing member is located outside the projection range of the transparent placement plate.

[0016] In the working state, the movable fixing member is located above the transparent placement plate. A support surface is provided on the top side of the movable fixing member, and the support surface is used to support the glasses.

[0017] In some embodiments, the movable fixing member includes a stop block and at least two support rods. The two support rods are spaced apart perpendicular to their extending directions. One end of the support rod along its extending direction is connected to the stop block. In the working state, at least one of the first areas is located on a side of one of the support rods perpendicular to its extending direction and facing away from the other support rod. The top surface of the support rod forms the support surface. The stop block is higher than the support surface, and at least a part of the stop block is used to be embedded between the two nose pads of the glasses.

[0018] In some embodiments, in the horizontal direction, an end face of the stop block close to the support rod is an arc surface.

[0019] In some embodiments, the number of the lens detection devices is at least two. A part of the transparent placement plate located outside the first area further includes a second area. In the working state, the second area and one of the first areas are respectively located on opposite sides of the movable fixing member perpendicular to the extending direction of the support rod. The first area is disposed opposite to the detection area of one of the lens detection devices, and the second area is disposed opposite to the detection area of the other lens detection device.

[0020] In some embodiments, the relative direction between the second area and one of the first areas is the first direction. The other first area is located on one side of the two along the first direction, and in a projection plane perpendicular to the first direction, at least a part of the projection of the other first area coincides with the projection of at least one of the two.

[0021] In some embodiments, the moving member moves by rotation and its rotation axis is along the vertical direction. There is a clearance formed between both the microlens detection device and the lens detection device and the transparent placement plate. During the rotation of the moving member, the moving member moves in and out of the clearance.

[0022] In some embodiments, in the projection plane perpendicular to the vertical direction, the projection of the transparent placement plate is completely within the projection range of the display area.

[0023] In some embodiments, in the projection plane perpendicular to the vertical direction, the projections of the two first regions partially overlap.

[0024] In the embodiment of the present utility model, the lensometer is provided with a plurality of first regions corresponding to the microlens detection device and the lens detection device respectively on the transparent placement plate, which is conducive to detecting different types of lenses on the same lensometer, facilitating the integration of the detection functions of lenses and microlenses, and there is no need to additionally adjust the position of the transparent placement plate relative to the microlens detection device and the lens detection device during the detection process, simplifying the calibration and operation steps. Description of the Drawings

[0025] Figure 1 Schematic layout diagram of the lensometer in an embodiment of the present utility model;

[0026] Figure 2 Schematic diagram of the transparent placement plate and the display device in an embodiment of the present utility model;

[0027] Figure 3 Schematic layout diagram of the transparent placement plate, the display device, the lens and the moving member in an embodiment of the present utility model, wherein the moving member is in a retracted state;

[0028] Figure 4 Schematic layout diagram of the transparent placement plate, the display device, the glasses and the moving member in an embodiment of the present utility model, wherein the moving member is in a working state;

[0029] Figure 5 is Figure 4 Schematic diagram of the embodiment in another perspective;

[0030] Figure 6 is Figure 5 Partial enlarged schematic diagram of position A in;

[0031] Description of the Reference Numerals

[0032] 10. Transparent placement plate; 10a. First area; 10b. Second area; 11. Support block; 12. Plate body; 20. Display device; 20a. Display area; 30. Microlens detection device; 31. Microlens detection lens; 40. Lens detection device; 41. Lens detection lens; 50. Moving fixture; 50a. Support surface; 51. Stop block; 52. Support rod; 60. Lens; 70. Glasses; 71. Nose pad; 72. Finished glasses. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0034] In the description of this application, the "vertical direction" orientation or position relationship is based on the attached Figure 1 and Figure 5 The directions or positions shown by the arrow X in the figure are as follows: the “top” or “upper” directions or positions are directed to the side that x1 is directed to; the “bottom” or “lower” directions or positions are directed to the side that x2 is directed to; the “first direction” directions or positions are based on the attached Figure 2 The orientation or position relationship shown by the arrow Y in the figure. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0035] The utility model embodiment provides a focal meter, referring to Figure 1 The focal meter includes a transparent placement plate 10, a display device 20, a microlens detection device 30 and a lens detection device 40.

[0036] The transparent placement plate 10 is used to place the lens 60, and the transparent placement plate 10 includes at least two first areas 10a, and the first areas 10a are used to be arranged opposite to the lens 60; the display device 20 is provided with a display area 20a for displaying patterns; the microlens detection device 30 is used to detect the parameters of the lens 60 provided with a microlens; the lens detection device 40 is used to detect the parameters of the lens 60.

[0037] The display area 20a is spaced apart from the transparent placement plate 10 in the vertical direction, the microlens detection device 30 and the lens detection device 40 are both located on the side of the transparent placement plate 10 away from the display area 20a and are spaced apart from the transparent placement plate 10, a first area 10a is arranged opposite to the detection area of ​​a lens detection device 40, and another first area 10a is arranged opposite to the detection area of ​​a microlens detection device 30.

[0038] The transparent placement plate 10 can transmit light beams, so that the patterned light beams with different textures displayed in the display area 20a can pass through with light beams of different illuminations, thereby reaching the top side lens 60 placed on the transparent placement plate 10. The specific material of the transparent placement plate 10 is not limited, such as quartz glass, organic glass, etc.

[0039] The display area 20a is used to emit light beams with different textures and illuminations in a display pattern.

[0040] The lens detection device 40 refers to a device in the related technology that can be used to detect parameters such as the vertex power, prism power, etc. of spherical lenses 60, aspherical lenses 60, progressive lenses, etc. The relevant technical principles and related equipment involved in realizing the detection have been applied in the related technology and will not be elaborated here.

[0041] The microlens detection device 30 refers to a device in the related art that can be used to detect parameters such as the defocus amount of the microlens in the lens 60. The relevant technical principles and related equipment involved in realizing the detection have been applied in the related art and will not be elaborated here.

[0042] The lens 60 is placed on the transparent placement plate 10. The light beam emitted by the display area 20a can pass through the first area 10a and then pass through the lens 60, and then be received by the detection area of ​​the lens detection device 40 or the detection area of ​​the microlens detection device 30. Through the change of the light beam, the lens detection device 40 or the microlens detection device 30 can detect the relevant parameters of the lens 60.

[0043] The specific type of the detection area of ​​the lens detection device 40 is not limited, for example, it is a lens detection lens 41, so that the light can enter the lens detection device 40 and can be received by the corresponding photosensitive element.

[0044] The specific type of the detection area of ​​the microlens detection device 30 is not limited, for example, it is a microlens detection lens 31, so that the light can enter the microlens detection device 30 and can be received by the corresponding photosensitive element.

[0045] When the lens 60 is located in a first area 10a opposite to the lens detection device 40, the lens detection device 40 can complete the detection of the lens 60; when the lens 60 is located in another first area 10a opposite to the microlens detection device 30, the microlens detection device 30 can complete the detection of the lens 60.

[0046] The focal meter in the embodiment of the utility model is advantageous for detecting different types of lenses 60 on the same focal meter by setting a plurality of first areas 10a corresponding to the microlens detection device 30 and the lens detection device 40 on the transparent placement plate 10, and is advantageous for realizing the integration of the detection functions of the lens 60 and the microlens. In addition, during the detection process, there is no need to additionally adjust the position of the transparent placement plate 10 relative to the microlens detection device 30 and the lens detection device 40, thereby simplifying the calibration and operation steps.

[0047] It is understandable that it is necessary to reduce the probability of the surface of the lens 60 being scratched due to wear during the inspection process, thereby causing adverse effects on the inspection structure.

[0048] In some embodiments, see Figure 1 and Figure 2 The transparent placement plate 10 includes a plate body 12 and a plurality of support blocks 11. The support blocks 11 are arranged on a side of the plate body 12 away from the display area 20a, and protrude in a vertical direction away from the display area 20a and are used to support the lens 60. The plurality of support blocks 11 are spaced apart from each other and arranged in a ring to form a first area 10a.

[0049] It can be understood that, in the projection plane perpendicular to the optical axis of the lens 60, the closer the area is to the center position of the projection of the lens 60, the higher its usage frequency. Accordingly, the closer the area is to the center position of the projection of the lens 60, the more it needs to be protected during the inspection process to reduce the chance of scratches.

[0050] On the one hand, the support block 11 enables a spacing between the lens 60 and the plate body 12, which helps to reduce the contact area between the lens 60 and the transparent placement plate 10, and helps to reduce the probability of the lens 60 being scratched and affecting detection; on the other hand, the center of the lens 60 can be spaced from the first area 10a formed by the support block 11, which helps to reduce the probability of the center of the lens 60 being scratched.

[0051] The shape of the first area 10 a formed by the plurality of support blocks 11 is not limited. For example, the shape of the first area 10 a is circular so as to match with the unprocessed lens 60 .

[0052] The specific number of the supporting blocks 11 surrounding and forming the first area 10 a is not limited, for example, 2, 3, 4, 5, 6, etc.

[0053] Among the plurality of support blocks 11 forming the first area 10 a , the intervals between two adjacent support blocks 11 are the same, so as to facilitate the lens 60 to maintain balance during the process of supporting the lens 60 .

[0054] It can be understood that after the lens 60 is processed into the finished lens 72 used in the glasses 70, although the size is reduced, the optical parameters between the lens 60 and the finished lens 72 remain unchanged. Therefore, the lens detection device 40 can also be used to detect the finished lens 72 of the glasses 70.

[0055] In some embodiments, referring to Figure 3 and Figure 4 , the lensmeter further includes a moving fixing member 50. The moving fixing member 50 is located on the side of the transparent placing plate 10 away from the display area 20a and can move relative to the transparent placing plate 10. The moving fixing member 50 includes an avoidance state and a working state.

[0056] In the avoidance state, in the projection plane perpendicular to the vertical direction, the projection of the moving fixing member 50 is located outside the projection range of the transparent placing plate 10. Thus, in the state where the unprocessed lens 60 needs to be detected, the probability that the moving fixing member 50 interferes with the placement position of the lens 60 is reduced, so that the unprocessed lens 60 can be detected by the microlens detection device 30 and the lens detection device 40, and the probability that the moving fixing member 50 blocks the detection of the microlens detection device 30 and the lens detection device 40 is reduced.

[0057] In the working state, the moving fixing member 50 is located above the transparent placing plate 10, and a support surface 50a is provided on the top side of the moving fixing member 50. The support surface 50a is used to support the glasses 70.

[0058] It can be understood that in the working state, the glasses 70 are placed on the top of the moving fixing member 50.

[0059] Due to the supporting effect of the moving fixing member 50, the glasses 70 are located above the transparent placing plate 10 and are spaced apart from the transparent placing plate 10 in the vertical direction, thereby reducing the probability that the transparent placing plate 10 comes into contact with the finished lens 72 in the glasses 70, and further reducing the risk of scratching the finished lens 72 by the transparent placing plate 10.

[0060] In the working state, through the supporting and fixing effect of the moving fixing member 50 on the glasses 70, it is convenient for the lens detection device 40 to detect the finished lens 72 in the glasses 70.

[0061] It can be understood that in the working state, in the projection plane perpendicular to the vertical direction, the projection of the support surface 50a at least partially coincides with the projection of the frame of the glasses 70, which is beneficial to reducing the risk of abrasion and scratching of the finished lens 72 by the moving fixing member 50, so that it can continue to be used by the user after the detection is completed.

[0062] It can be understood that the glasses 70 are provided with two finished lenses 72. Therefore, it is necessary to support and fix the parts where the two finished lenses 72 in the glasses 70 are located respectively.

[0063] In some embodiments, see Figure 3 , Figure 4 and Figure 6 The movable fixing member 50 includes at least two support rods 52, and the two support rods 52 are spaced apart and perpendicular to the extension direction of the two support rods 52. The top surface of the support rod 52 forms a support surface 50a, and each support rod 52 is used to support one of the lenses 72 in the glasses 70.

[0064] By configuring a supporting rod 52 for each spectacles 72, the movable fixing member 50 balances the force on the spectacles 70 during the process of supporting the spectacles 70, thereby reducing the risk of the spectacles 70 falling.

[0065] The support blocks 11 are arranged at intervals, which is beneficial to reducing the overall volume of the movable fixing member 50 and reducing its mass.

[0066] In some embodiments, the length direction of the support rod 52 is its extension direction.

[0067] In some embodiments, see Figure 2 and Figure 4 In the working state, at least one first area 10a is located on a side of a support rod 52 perpendicular to its extension direction away from another support rod 52, and the distance between the support surface 50a and the plate body 12 is not less than the height of the support block 11. In the working state, in the projection plane perpendicular to the first direction, at least part of the projection of the first area 10a is overlapped with the projection of the mirror 72.

[0068] The height of the support block 11 refers to the dimension of the support block 11 along the vertical direction.

[0069] In this way, during the process of inspecting the finished lens 72 of the glasses 70 through the lens inspection device 40, the positions of the lens inspection device 40 and the transparent placement plate 10 do not need to be moved additionally, which is beneficial to simplifying the overall structure and operation steps of the focal meter; and reducing the risk of interference between the glasses 70 and the support block 11.

[0070] In some embodiments, the distance between the support rod 52 and the plate body 12 is greater than the height of the support block 11 in the vertical direction, so as to reduce the risk of interference between the movement of the movable fixing member 50 and the support block 11 .

[0071] In some embodiments, in working state, the support block 11 can support the glasses 70 in the vertical direction.

[0072] It can be understood that the supporting surface 50a limits the glasses 70 in the vertical direction. In order to reduce the movement of the glasses 70 relative to the fixing member 50 in the horizontal direction, it is necessary to limit the glasses 70 in the horizontal direction during the detection process.

[0073] In some embodiments, referring to Figures 4 to 6 , the moving fixing member 50 further includes a stop block 51. One end of the support rod 52 along its extending direction is connected to the stop block 51. The stop block 51 is higher than the supporting surface 50a, and at least a part of the stop block 51 is used to be embedded between the two nose pads 71 of the glasses 70.

[0074] In this way, through the stop block 51, the original nose pad 71 structure in the glasses 70 is utilized to realize the limiting effect on the glasses 70 in the horizontal direction.

[0075] The horizontal direction is any direction perpendicular to the vertical direction.

[0076] In some embodiments, referring to Figure 4 , in the horizontal direction, the end face of the stop block 51 on the side close to the support rod 52 is an arc surface.

[0077] In this way, it is beneficial for the shape of the stop block 51 to adapt to glasses 70 with different shapes, sizes and different distances between the nose pads 71, and it is beneficial to improve the adaptability between the stop block 51 and different glasses 70.

[0078] The specific material of the moving fixing member 50 is not limited, such as plastic, which is beneficial to reduce the mass of the moving fixing member 50.

[0079] In some embodiments, referring to Figure 4 , the gap between the two support rods 52 can avoid the connecting member between the frames of the glasses 70, so that the glasses 70 can be positioned on the moving fixing member 50.

[0080] In some embodiments, referring to Figure 1 , the number of the lens detection devices 40 is at least two, which are used to detect the two finished lenses 72 in the glasses 70 respectively in the working state, so as to complete the detection of the two finished lenses 72 in the glasses 70 at the same time, and improve the detection efficiency of the glasses 70.

[0081] In some embodiments, referring to Figure 2 , the part of the transparent placement plate 10 outside the first region 10a further includes a second region 10b. In the working state, the second region 10b and a first region 10a are respectively located on the opposite sides of the moving fixing member 50 perpendicular to the extending direction of the support rod 52. The first region 10a is oppositely arranged with the detection region of a lens detection device 40, and the second region 10b is oppositely arranged with the detection region of another lens detection device 40.

[0082] It can be understood that the second region 10b is disposed opposite to the display region 20a in the vertical direction.

[0083] That is to say, during the detection of the two spectacle lenses 72 in the spectacles 70, a part of the light beam generated by the display region 20a passes through the second region 10b and is received by a lens detection device 40, and another part of the light beam passes through the first region 10a and is received by another lens detection device 40.

[0084] In this way, the second region 10b and one first region 10a can play a role in stopping the spectacles 70 in the vertical direction, reducing the risk of the spectacles 70 falling, and playing a certain protective role for the spectacles 70.

[0085] In some embodiments, in the working state, there is a gap between the second region 10b and the spectacles 70 to reduce the probability of movement interference between the second region 10b and the moving fixing member 50.

[0086] In other embodiments, in the working state, the second region 10b can play a supporting role for the spectacles 70 in the vertical direction.

[0087] It can be understood that there is no need to provide a support block 11 on the second region 10b.

[0088] In some embodiments, referring to Figure 2 , the second region 10b is located on the plate body 12.

[0089] In some embodiments, the dimension of the second region 10b in the vertical direction is the same as that of the first region 10a in the vertical direction, and the top surface of the first region 10a is flush with the top surface of the second region 10b, so as to complete the processing at one time during the processing of the plate body 12 and simplify the production process.

[0090] In some embodiments, referring to Figure 2 , the relative direction of the second region 10b and one first region 10a is the first direction, the other first region 10a is located on one side of the two in the first direction, and in the projection plane perpendicular to the first direction, at least part of the projection of the other first region 10a coincides with the projection of at least one of the two.

[0091] In this way, it is beneficial to make the arrangement between the two first regions 10a and the second region 10b more compact. Since the projected area of the transparent placement plate 10 in the direction perpendicular to the vertical direction is reduced, correspondingly, it is beneficial to make the arrangement of the corresponding micro-lens detection device 30 and the lens detection device 40 more compact, and it is beneficial to reduce the overall external contour size of the focal length meter.

[0092] It is understandable that the first direction is perpendicular to the vertical direction.

[0093] The specific moving manner of the moving fixing member 50 is not limited.

[0094] Exemplarily, referring to Figure 1 、 Figure 3 and Figure 4 , the moving manner of the moving fixing member 50 is rotation and its rotation axis is along the vertical direction. There are avoidance gaps formed at intervals between both the micro-lens detection device 30 and the lens detection device 40 and the transparent placement plate 10. During the rotation of the moving fixing member 50, the moving fixing member 50 moves in and out of the avoidance gap.

[0095] In the way of rotation, it is beneficial to reduce the size of the guiding structure required to guide the movement of the moving fixing member 50 during movement, which is beneficial to making the structure of the lensmeter more compact; the moving fixing member 50 rotates along the horizontal direction, which is beneficial to reducing the space where the avoidance gap interferes with the movement between the moving fixing member 50, which is beneficial to making the micro-lens detection device 30 and the lens detection device 40 closer to the lens 60, and also beneficial to reducing the overall external contour size of the lensmeter.

[0096] In some embodiments, the lensmeter further includes a driving motor, and the driving end of the driving motor is drivingly connected to the moving fixing member 50 to drive the moving fixing member 50 to rotate, so as to facilitate automatically controlling the position of the moving fixing member 50 according to the detection requirements.

[0097] In some embodiments, referring to Figure 2 , in the projection plane perpendicular to the vertical direction, the projection of the transparent placement plate 10 is completely within the projection range of the display area 20a.

[0098] In this way, when the projection of the lens 60 perpendicular to the vertical direction is relatively large, it is still possible to make the light beam emitted from the display area 20a enter the micro-lens detection device 30 and the lens detection device 40, which is beneficial to improving the adaptability of the lensmeter to detect lenses 60 of different sizes.

[0099] It is understandable that during the detection of the micro-lens, generally, other different lenses 60 are not detected synchronously.

[0100] In some embodiments, in the projection plane perpendicular to the vertical direction, the projections of the two first regions 10a partially overlap.

[0101] In this way, it is beneficial to making the structure of the transparent placement plate 10 more compact, and also beneficial to reducing the overall external contour size of the lensmeter.

[0102] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A focal meter, characterized in that: The lens meter comprises: A transparent placement plate, used for placing lenses, the transparent placement plate comprising at least two first areas, the first areas being used for being arranged opposite to the lenses; A display device having a display area for displaying a pattern; A microlens detection device, used to detect parameters of a lens provided with a microlens; A lens detection device, used for detecting parameters of the lens; The display area and the transparent placement plate are spaced apart in the vertical direction, the microlens detection device and the lens detection device are both located on the side of the transparent placement plate away from the display area and spaced apart from the transparent placement plate, one of the first areas is arranged opposite to a detection area of ​​the lens detection device, and another of the first areas is arranged opposite to a detection area of ​​the microlens detection device.

2. The lens meter according to claim 1, characterized in that: The transparent placement plate includes a plate body and a plurality of support blocks, wherein the support blocks are arranged on a side of the plate body away from the display area, protrude in a vertical direction away from the display area and are used to support the lenses, and the plurality of support blocks are spaced apart from each other and arranged in a ring to form the first area.

3. The lens meter according to claim 1, characterized in that: The lens meter further includes a movable fixing part, which is located at a side of the transparent placement plate away from the display area and can move relative to the transparent placement plate, and the movable fixing part includes an avoidance state and a working state; In the avoidance state, in a projection plane perpendicular to the vertical direction, the projection of the movable fixing member is outside the projection range of the transparent placement plate; In the working state, the movable fixing member is located above the transparent placement plate, and a supporting surface is provided on the top side of the movable fixing member, and the supporting surface is used to support the glasses.

4. The focal meter according to claim 3, characterized in that: The movable fixing member includes a stop block and at least two support rods, the two support rods are spaced apart perpendicularly to their extension directions, one end of the support rod along its extension direction is connected to the stop block, and in the working state, at least one of the first areas is located on the side of one of the support rods perpendicularly to its extension direction away from the other support rod, the top surface of the support rod forms the support surface, the stop block is higher than the support surface, and at least a portion of the stop block is used to be embedded between the two nose pads of the glasses.

5. The lens meter according to claim 4, characterized in that: In the horizontal direction, the end surface of the stop block close to the support rod is an arc surface.

6. The lens meter according to claim 4, characterized in that: The number of the lens detection devices is at least two, and the portion of the transparent placement plate located outside the first area also includes a second area. In the working state, the second area and one of the first areas are respectively located on opposite sides of the movable fixing part perpendicular to the extension direction of the support rod, the first area is arranged opposite to the detection area of ​​one of the lens detection devices, and the second area is arranged opposite to the detection area of ​​another of the lens detection devices.

7. The lens meter according to claim 6, characterized in that: The relative direction between the second area and one of the first areas is the first direction, the other first area is located on one side of the two along the first direction, and in the projection plane perpendicular to the first direction, at least part of the projection of the other first area coincides with the projection of at least one of the two.

8. The lens meter according to claim 3, characterized in that: The movable fixing part moves in a rotational manner and its rotation axis is along the vertical direction. The microlens detection device and the lens detection device are both separated from the transparent placement plate to form an avoidance gap. During the rotation of the movable fixing part, the movable fixing part enters and exits the avoidance gap.

9. The focal meter according to claim 1, characterized in that: In the projection plane perpendicular to the vertical direction, the projection of the transparent placement plate is completely located within the projection range of the display area.

10. The lens meter according to claim 1, characterized in that: In a projection plane perpendicular to the vertical direction, projections of the two first regions partially overlap.

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