阅读说明：本技术 一种镜片中心厚度测定装置及方法 (Device and method for measuring center thickness of lens ) 是由 候松权 邓林军 于 2019-08-30 设计创作，主要内容包括：一种镜片中心厚度测定装置,其特征在于：包括底座、以及设置在底座上的支架和基准平台,还包括设置在基准平台上的定位衬套、以及内嵌在定位衬套内的红宝石头下测针和套设在定位衬套外的镜片固定治具,所述红宝石头下测针的针头向上伸出到定位衬套外并与安装在镜片固定治具上的镜片的下表面相抵且对准镜片的中心,所述支架上设有测定器,所述测定器的下方设有可上下伸缩的红宝石头上测针,还包括设置在底座与基准平台之间的X-Y双向滑台。该装置稳定性和数据一致性较好、且测针的温度变化对测试精度影响较小。另外还提供一种镜片中心厚度测定方法。(A lens center thickness measuring device, characterized in that: including the base and set up support and the benchmark platform on the base, still including setting up the location bush on the benchmark platform and embedded ruby head down the measuring pin and the cover of establishing in the location bush outside the fixed tool of lens, ruby head down the measuring pin the syringe needle upwards stretch out outside the location bush and offset and aim at the center of lens with the lower surface of the lens of installing on the fixed tool of lens, be equipped with the apparatus on the support, the below of apparatus is equipped with the overhead measuring pin of flexible ruby from top to bottom, still including setting up the two-way slip table of X-Y between base and benchmark platform. The device has good stability and data consistency, and the temperature change of the probe has little influence on the test precision. In addition, a method for measuring the central thickness of the lens is also provided.)

1. A lens center thickness measuring device, characterized in that: including base (1) and support (2) and reference platform (4) of setting on base (1), still including setting up locating bush (7) on reference platform (4) and embedded ruby stone down measuring pin (8) and the cover establish lens fixed tool (5) outside locating bush (7) in locating bush (7), the syringe needle of ruby head down measuring pin (8) upwards stretches out outside locating bush (7) and offsets and aim at the center of lens (10) with the lower surface of installing lens (10) on lens fixed tool (5), be equipped with surveyor (11) on support (2), the below of surveyor (11) is equipped with can be flexible ruby head up measuring pin (9) from top to bottom, still including setting up X-Y two-way slip table (3) between base (1) and reference platform (4) for drive reference platform (4) move on base (1) and make ruby head down measuring pin (8) of installing on it ) Is aligned with the tip of the ruby on-head stylus (9) below the gauge (11).

2. The apparatus for measuring the center thickness of a lens according to claim 1, wherein: the pinhead of the ruby head upper measuring pin (9) and the pinhead of the ruby head lower measuring pin (8) are both spherical.

3. The apparatus for measuring the center thickness of a lens according to claim 1, wherein: lens fixing jig (5) include pedestal (22), set up positioning groove (15) that are used for placing lens (10) at pedestal (22) up end and set up under pedestal (22) terminal surface with positioning bushing (7) shape assorted first locating hole (16), first locating hole (16) upwards extend and communicate with the bottom of positioning groove (15), the syringe needle of first lower probe (8) of ruby upwards stretches out outside positioning bushing (7) and offsets and aim at the center of lens (10) with the lower surface of placing lens (10) in positioning groove (15).

4. The apparatus for measuring the center thickness of a lens according to claim 3, wherein: the upper end face of the positioning bush (7) is lower than the bottom face of the positioning groove (15) of the lens fixing jig (5), a second positioning through hole (17) used for installing the lower measuring pin (8) of the ruby head is arranged in the positioning bush (7), and a height adjusting device connected with the lower measuring pin (8) of the ruby head is further arranged in the second positioning through hole (17) and used for adjusting the height of the lower measuring pin (8) of the ruby head in the second positioning through hole (17).

5. The apparatus for measuring the center thickness of a lens according to claim 4, wherein: the height adjusting device comprises an adjusting nut (18) and a first thread section (6) which is arranged at the bottom of the lower measuring pin (8) of the ruby head and used for fine adjustment, the adjusting nut (18) comprises a large head part (19) and a second thread section (20) which is arranged below the large head part (19) and is used for coarse adjustment, the big head part (19) of the adjusting nut (18) is fixedly arranged in the second positioning through hole (17) and is positioned below the lower measuring needle (8) of the ruby head, a first thread section (6) of the lower measuring needle (8) of the ruby head is in threaded connection with a large head part (19) of an adjusting nut (18), the second thread section (20) of the adjusting nut (18) is in threaded connection with the reference platform (4), and the positioning bushing (7) is in up-and-down sliding fit with the first positioning hole (16) of the lens fixing jig (5) when the second thread section (20) is screwed in and out.

6. The apparatus for measuring the center thickness of a lens according to claim 5, wherein: the first positioning hole (16) is a step hole with a small upper part and a large lower part, and the positioning lining (7) is provided with a step (21) matched with the step hole and used for limiting the highest position of the positioning lining (7) in the first positioning hole (16).

7. The apparatus for measuring the center thickness of a lens according to claim 1, wherein: the measuring device (11) is arranged on the bracket (2) through an XYZ three-direction position adjusting device.

8. The apparatus for measuring the center thickness of a lens according to claim 7, wherein: the XYZ three-direction position adjusting device comprises a horizontal cantilever (12), the support (2) comprises an upright post (23), one end of the horizontal cantilever (12) is provided with a buckle (13) which can slide up and down along the upright post (23) and rotate along the upright post, the buckle (13) is provided with a locking device (14) used for locking the horizontal cantilever (12) on the upright post (23), and the other end of the horizontal cantilever (12) is provided with a measuring device (11).

9. A method for measuring the center thickness of a lens is characterized in that: it comprises the following steps:

(1) before the tested lens (10) is placed in, the X-Y bidirectional sliding table (3) is adjusted to enable the needle head of a ruby stone lower measuring needle (8) in a positioning bush (7) on the X-Y bidirectional sliding table (3) to be aligned with the needle head of a ruby head upper measuring needle (9) on the bracket (2);

(2) pressing down the ruby head upper measuring needle (9), judging whether the current test result is in a set range by a tester (11), if so, lifting up the ruby head upper measuring needle (9), judging that the needle head of the ruby head lower measuring needle (8) is aligned with the needle head of the ruby head upper measuring needle (9), then entering the next step, if not, lifting up the ruby head upper measuring needle (9), and returning to the step (1) for readjustment;

(3) the measured lens (10) is placed on the lens fixing jig (5) positioned on the positioning bushing (7), the ruby head upper measuring pin (9) is pressed down again, and the central thickness value of the measured lens (10) can be obtained through the measuring device (11).

Technical Field

The invention relates to the technical field of detection devices, in particular to a device and a method for measuring the center thickness of a lens.

Background

The existing lens center thickness measuring device generally adopts a handheld dial indicator, and during measurement, the position of a lens and the relative position of a measuring needle of the handheld dial indicator and the lens are not fixed, so that the measuring needle can be well aligned with the center of the lens during each measurement, and the stability and the data consistency of the measuring device are poor; moreover, the hand-held dial indicator adopts a metal measuring needle, and the temperature change of the metal measuring needle has great influence on the precision of the measuring equipment.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the lens center thickness measuring device has good stability and data consistency, and the temperature change of the measuring pin has small influence on the measuring precision.

The technical solution of the invention is as follows: a lens center thickness measuring device, characterized in that: including the base and set up support and the benchmark platform on the base, still including setting up the location bush on the benchmark platform and embedded ruby head down the measuring pin and the cover in the location bush in the fixed tool of lens, ruby head down the measuring pin's syringe needle upwards stretches out outside the location bush and offsets and aim at the center of lens with the lower surface of the lens of installing on the fixed tool of lens, be equipped with the apparatus on the support, the below of apparatus is equipped with the ruby head up measuring pin that can stretch out and draw back from top to bottom, still including setting up the two-way slip table of X-Y between base and benchmark platform for drive benchmark platform moves on the base and makes the syringe needle of the ruby head down measuring pin of installing on it align with the syringe needle of the ruby head up measuring pin of apparatus below.

After adopting the structure, the invention has the following advantages:

the lens center thickness measuring device is provided with the lens fixing jig for fixing the lens, the positioning bushing for fixing the relative position of the measuring needle and the lens, and the X-Y bidirectional sliding table for ensuring that the needle head of the measuring needle below the ruby head is aligned with the needle head of the measuring needle above the ruby head, so that the measuring needle can be ensured to be aligned with the center of the lens during each detection, and the stability of the device and the consistency of data are better; in addition, the temperature change of the ruby measuring needle has small influence on the precision of the measuring equipment, so that the precision of the measuring device is higher.

Preferably, the needle head of the ruby head upper measuring needle and the needle head of the ruby head lower measuring needle are both spherical. The arrangement can facilitate the alignment of the upper and lower measuring pins and effectively prevent the measuring pins from damaging the lens.

Preferably, the lens fixing jig comprises a base body, a positioning groove arranged on the upper end surface of the base body and used for placing the lens, and a first positioning hole arranged on the lower end surface of the base body and matched with the positioning bushing in shape, wherein the first positioning hole extends upwards and is communicated with the bottom of the positioning groove, and the needle head of the lower measuring needle of the ruby head extends upwards out of the positioning bushing and abuts against the lower surface of the lens placed in the positioning groove and is aligned with the center of the lens. The lens fixing jig can fix the lens only by adopting a simple structure, can be positioned on the positioning bushing, and is convenient for the measuring pin to be abutted against the lens.

Preferably, the upper end surface of the positioning bushing is lower than the bottom surface of the positioning groove of the lens fixing jig, a second positioning through hole for mounting the ruby head lower measuring pin is formed in the positioning bushing, and a height adjusting device connected with the ruby head lower measuring pin is further arranged in the second positioning through hole and used for adjusting the height of the ruby head lower measuring pin in the second positioning through hole. The upper end face of the positioning bushing is lower than the upper end face of the positioning groove of the lens fixing jig, so that the convex lens and the concave lens can be placed in the positioning groove of the lens fixing jig, the height adjusting device is arranged, the height of the lower measuring pin of the ruby head in the second positioning through hole can be adjusted, and therefore the lower measuring pin of the ruby head can be guaranteed to be abutted to the lower surface of the lens regardless of the convex lens or the concave lens.

Preferably, the height adjusting device comprises an adjusting nut and a first thread section which is arranged at the bottom of the lower measuring pin of the ruby head and used for fine adjustment, the adjusting nut comprises a big head and a second thread section which is arranged below the big head and used for coarse adjustment, the big head of the adjusting nut is fixedly arranged in the second positioning through hole and is positioned below the lower measuring pin of the ruby head, the first thread section of the lower measuring pin of the ruby head is in threaded connection with the big head of the adjusting nut, the second thread section of the adjusting nut is in threaded connection with the reference platform, and the positioning bushing is in up-and-down sliding fit with the first positioning hole of the lens fixing jig when the second thread section is screwed out. The arrangement is convenient for fixing the positioning bushing on the reference platform through the adjusting nut, and can also change the height of the positioning bushing through screwing in and screwing out of the second thread section of the adjusting nut, so that the height of the lower ruby head measuring pin arranged on the positioning bushing is roughly adjusted; the height of the measuring needle under the ruby head can be quickly and accurately adjusted by adopting an adjusting mode of coarse adjustment and fine adjustment.

Preferably, the first positioning hole is a stepped hole with a small upper part and a large lower part, and the positioning lining is provided with a step matched with the stepped hole for limiting the highest position of the positioning lining in the first positioning hole. This setting is through the highest position of restriction location bush in first locating hole, can prevent to install the highest position of the first lower measuring pin of ruby in the location bush and surpass extreme position to can effectively avoid the damage to the lens when the first lower measuring pin mounting height of ruby is too high.

Preferably, the measuring device is mounted on the stand by an XYZ three-directional position adjustment device. The arrangement can ensure that the needle head of the measuring needle under the ruby head is aligned with and close to the needle head of the measuring needle on the ruby head under the measuring device.

Preferably, the XYZ three-direction position adjustment device comprises a horizontal cantilever, the support comprises a column, one end of the horizontal cantilever is provided with a buckle which can slide up and down along the column and rotate along the column, the buckle is provided with a locking device for locking the horizontal cantilever on the column, and the other end of the horizontal cantilever is provided with a detector. The XYZ three-direction position adjusting device is simple in structure and convenient and reliable in position adjustment.

The invention also aims to solve the technical problems that: the method for measuring the center thickness of the lens is good in device stability and data consistency, and the influence of the temperature change of the probe on the measurement precision is small.

The other technical solution of the invention is as follows: a method for measuring the center thickness of a lens is characterized in that: it comprises the following steps:

(1) before the measured lens is put in, the X-Y bidirectional sliding table is adjusted to enable the needle head of the lower measuring needle of the ruby head in the positioning bushing on the X-Y bidirectional sliding table to be aligned with the needle head of the upper measuring needle of the ruby head on the bracket;

(2) pressing the ruby head upper measuring needle downwards, judging whether the current test result is in a set range by a determinator, if so, lifting the ruby head upper measuring needle, judging that the needle head of the ruby head lower measuring needle is aligned with the needle head of the ruby head upper measuring needle, then entering the next step, if not, lifting the ruby head upper measuring needle, and returning to the step (1) for readjustment;

(3) and putting the measured lens into a lens fixing jig positioned on the positioning bushing, and pressing down the upper measuring pin of the ruby head again to obtain the central thickness value of the measured lens through the measuring device.

After the method is adopted, the invention has the following advantages:

the method for measuring the center thickness of the lens not only fixes the position of the lens through the lens fixing jig, but also fixes the relative positions of the measuring needle and the lens through the positioning bushing, and also ensures that the needle head of the measuring needle below the ruby head is aligned with the needle head of the measuring needle above the ruby head by utilizing the X-Y bidirectional sliding table, so that the measuring needle can be ensured to be aligned with the center of the lens during each detection, and the stability of the device and the consistency of data are better; in addition, the temperature change of the ruby measuring needle has small influence on the precision of the measuring equipment, so that the precision of the measuring device is higher.

Description of the drawings:

FIG. 1 is a schematic structural diagram of an apparatus for measuring the center thickness of a lens according to the present invention;

FIG. 2 is a cross-sectional view of a device for measuring the center thickness of a lens according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is another cross-sectional view of a device for measuring the center thickness of a lens according to the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at B;

in the figure: 1-base, 2-support, 3-X-Y bidirectional sliding table, 4-reference platform, 5-lens fixing jig, 6-first screw section, 7-positioning bush, 8-ruby head lower measuring pin, 9-ruby head upper measuring pin, 10-lens, 11-measuring device, 12-horizontal cantilever, 13-buckle, 14-locking device, 15-positioning groove, 16-first positioning hole, 17-second positioning through hole, 18-adjusting nut, 19-big head, 20-second screw section, 21-step, 22-seat body and 23-upright column.

Detailed Description

The invention is further described with reference to the following embodiments in conjunction with the accompanying drawings.