CN111175028A - Eccentricity detection device and method for small-caliber lens - Google Patents
Eccentricity detection device and method for small-caliber lens Download PDFInfo
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- CN111175028A CN111175028A CN202010107506.8A CN202010107506A CN111175028A CN 111175028 A CN111175028 A CN 111175028A CN 202010107506 A CN202010107506 A CN 202010107506A CN 111175028 A CN111175028 A CN 111175028A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
The application relates to the technical field of optical part machining, in particular to an eccentricity detection device and method for a small-caliber lens. The eccentricity detection device of the small-caliber lens comprises a plane window sheet and a clamp, wherein the upper surface of the plane window sheet is used for fixedly mounting the lens to be detected; the bottom of the clamp is provided with a bearing window sheet which is used for being fixedly installed and matched with an eccentric clamp of an eccentric detector, two elastic clamping sheets are arranged on the bearing window sheet, one end of each elastic clamping sheet is fixedly connected to the bearing window sheet, the other end of each elastic clamping sheet can be movably pressed above the plane window sheet so as to fixedly clamp the plane window sheet between the bearing window sheet and the elastic clamping sheets, and meanwhile, the elastic clamping sheets are pressed on different parts of the outer circumferential wall of the lens to be detected above the plane window sheet in a propping mode and used for positioning the rotation of the lens to be detected during detection. The device of this application can carry out eccentric detection to the plano-concave or plano-convex little lens that the bore is less than 2 millimeters, and it is more simple and convenient to operate, improves and detects precision and efficiency.
Description
Technical Field
The application relates to the technical field of optical part machining, in particular to an eccentricity detection device and method for a small-caliber lens.
Background
In the field of optical part machining, an eccentricity index is one of important indexes of an optical part, and refers to the deviation of an optical axis and a curved surface geometric axis of the optical part caused by errors in a machining process. To ensure the quality of optical products, it is usually necessary to perform center deviation detection on the processed products.
The existing eccentricity measurement mainly comprises the following modes that in the rough machining stage, the outer diameter and the R value are adopted for positioning, a measuring head of a dial gauge is used for propping against the edge of a lens to be tested, the lens rotates for a circle, the jumping quantity of the dial gauge value is the edge thickness difference, and the inclination angle and the eccentricity value of the surface of a product can be calculated according to the edge difference value; in the finished product detection stage, the lens to be tested is placed on a clamp matched with the caliber, then the clamp is fixed on an eccentric measuring instrument, and the eccentric measuring instrument calculates the eccentric value according to the offset of the laser transmission light beam by rotating the lens to be tested.
However, for a product with a smaller lens caliber, for example, a product with a caliber smaller than 2 mm, on one hand, the caliber is too small to exceed the measurement range of 2.5 mm to 150 mm of a conventional eccentric fixture, and the outer diameter surface of a single plate cannot be measured by using a conventional checking fixture, on the other hand, in the rotation process of an eccentric test, the lens is small and light, so that the situation of rotation or easy jumping of the lens often occurs, and meanwhile, the requirement on manual operation is high, so that the eccentric value of the lens cannot be accurately tested, and the detection efficiency is low.
Therefore, how to improve the operability of the eccentricity test of the small-caliber lens and improve the detection efficiency is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
One of the objectives of the present invention is to overcome the above disadvantages and to provide an apparatus and a method for detecting eccentricity of a small-caliber lens, which can detect eccentricity of a plano-concave or plano-convex small lens with a caliber less than 2 mm, and is simpler and more convenient to operate, and improves detection accuracy and efficiency.
In order to solve the technical problem, the invention provides an eccentricity detection device of a lens, which comprises a plane window sheet (1) used for fixedly installing the lens (3) to be detected and a clamp (2) used for fixing the plane window sheet (1) on an eccentricity clamp of an eccentricity detector and positioning the rotation of the lens (3) to be detected;
the plane window sheet (1) is a flat transparent material, and the upper surface of the plane window sheet is used for fixedly mounting a lens (3) to be detected;
the bottom of the clamp (2) is provided with a bearing window sheet (21) which is used for being fixedly installed and matched with an eccentric clamp of the eccentric detector, two elastic clamping pieces (22) are arranged on the bearing window piece (21), one end of each elastic clamping piece (22) is fixedly connected on the bearing window piece (21), the other end of each elastic clamping piece can be movably pressed above the plane window piece (1) so as to fixedly clamp the plane window piece (1) between the bearing window piece (21) and the elastic clamping piece (22), the tail ends of the other ends of the two elastic clamping pieces (22) are respectively pressed on different parts of the outer circumferential wall of the lens (3) to be detected, which is fixedly arranged above the plane window piece (1), and are used for positioning the rotation of the lens (3) to be detected during detection, the connecting line between the top pressure point of the lens (3) to be detected and the circle center of the lens (3) to be detected is not on the same straight line at the tail ends of the other ends of the two elastic clamping pieces (22); the bearing window sheet (21) is at least provided with a transparent light-transmitting part or a hollow part at the part which is positioned right below the lens (3) to be detected.
Further, the lens (3) to be detected is fixedly arranged on the upper surface of the plane window sheet (1) through jelly.
Furthermore, the material of the plane window sheet (1) and the bearing window sheet (21) is K9 material glass.
Further, the lens to be detected is a plano-concave lens or a plano-convex lens, and the caliber of the lens to be detected is less than 2 mm.
Accordingly, the present application also provides a method for detecting decentration of a small-caliber lens using the decentration detecting device according to any one of claims 1 to 4, comprising the steps of:
and 4, pushing the plane window sheet to drive the lens (3) to be detected to rotate at least 360 degrees around the center of the lens (3) to be detected, enabling the tail ends of the other ends of the two elastic clamping pieces (22) to be respectively in contact with the peripheral wall of the lens (3) to be detected in the rotating process, and acquiring the eccentricity value of the lens (3) to be detected according to the eccentricity and the eccentricity position of the detection laser beam imaging position displayed by the imaging system of the eccentricity detector (4) in the rotating process.
The technical scheme of the invention has the beneficial effects that:
1. through will wait to detect the lenslet and glue with the plane window piece, will wait that the facet of detecting the product turns into the big plane of plane window piece, the structure is more stable, the manual operation in the location of the anchor clamps of being convenient for and the rotation test, and the operation is more controllable, improves efficiency of software testing.
2. The bearing window piece of the clamp is matched with a conventional clamp of the eccentric tester, and the outer diameter of the small lens to be detected is positioned through the two clamping pieces, so that the small lens to be detected cannot deviate in the test rotating process, and the test accuracy of the small lens eccentric value can be improved.
Drawings
Fig. 1 is an assembly diagram of an eccentricity detection device of a small-caliber lens and a lens to be detected according to the present invention.
Fig. 2 is a top view of an assembly of the eccentricity detection device of the small-caliber lens and the lens to be detected according to the present invention.
Fig. 3 is a side view of the eccentricity detecting device of a small-caliber lens and the assembly of the lens to be detected according to the present invention.
FIG. 4 is a schematic diagram of a method for detecting decentration of a small-aperture lens according to the present invention.
Wherein, 1 is a plane window sheet, 2 is a clamp, 21 is a bearing window sheet, 22 is an elastic clamping sheet, 3 is a lens to be detected, 4 is an eccentricity tester, and 5 is an eccentric clamp.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the assembly diagram of the eccentricity detection device of the small-caliber lens and the lens to be detected of the present invention is shown, the eccentricity detection device of the small-caliber lens includes a planar window (1) for fixedly mounting the lens to be detected (3) and a clamp (2) for fixing the planar window (1) to an eccentric clamp (5) of an eccentricity detector (4) and positioning the rotation of the lens to be detected (3);
the plane window sheet (1) is a flat transparent material, and the upper surface of the plane window sheet is used for fixedly mounting a lens (3) to be detected; the shape of the flat louvers is not limited herein, but circular louvers are generally used for the convenience of the subsequent test rotation operation. Preferably, the lens to be detected is a plano-concave small lens or a plano-convex small lens, and the caliber of the small lens is less than 2 mm. The lens to be detected is fixed on the surface of the plane window sheet (1) in a mode that the plane is downward, and the concave surface or the convex surface is upward, and the gluing position is close to the circle center of the plane window sheet as far as possible. In order to ensure that the light source of the eccentricity tester can observe the image of the plano-convex/plano-concave lens through the plane window sheet (1), K9 material glass can be selected as the material for manufacturing the plane window sheet (1).
The bottom of the clamp (2) is a bearing window sheet (21) which is used for being fixedly installed and matched with an eccentric clamp of an eccentric detector and is generally semicircular, the bearing window sheet (21) is made of K9 material glass, two elastic clamping sheets (22) are arranged on the bearing window sheet (21), one end of each elastic clamping sheet (22) is fixedly connected to the bearing window sheet (21), the specific connection mode can adopt common methods such as glue bonding or screw fixation, the other end of each elastic clamping sheet can be movably pressed above the plane window sheet (1) so as to fixedly clamp the plane window sheet (1) between the bearing window sheet (21) and the elastic clamping sheet (22), the tail ends of the other ends of the two elastic clamping sheets (22) are pressed on different parts of the outer circumferential wall of a lens (3) to be detected and fixedly installed above the plane window sheet (1), and the plane window sheet (1) is fixed between the bearing window sheet (21) and the elastic sheets (22) by elasticity, and is used for positioning the rotation of the lens (3) to be detected during detection. In addition, in order to enable the plane window piece (1) to rotate in the detection process, the tail ends of the other ends of the two elastic clamping pieces (22) are required to be not on the same straight line with a connecting line between the jacking point of the lens (3) to be detected and the circle center of the lens (3) to be detected. Preferably, the bearing window sheet (21) is at least a transparent light-transmitting part or a hollow part at the part thereof under the lens (3) to be detected, so that the eccentricity detection deviation caused by the refraction of the test light can be avoided.
FIG. 4 is a schematic diagram of a method for detecting decentration of a lens according to the present invention, comprising the following steps:
and 4, propping the plane window (1) by fingers, applying a certain force to push the plane window (1) to drive the lens (3) to be detected to rotate at least 360 degrees around the center of the lens (3) to be detected, enabling the tail ends of the other ends of the two elastic clamping pieces (22) to be respectively in contact with the peripheral wall of the lens (3) to be detected in the rotating process, and acquiring the eccentricity value of the lens (3) to be detected according to the eccentricity and the eccentricity position of the detection laser beam imaging position displayed by the imaging system of the eccentricity detector (4) in the rotating process. The plane window sheet rotates to drive the lens to be detected to rotate, the outer diameter of the lens to be detected is close to two points of the two clamping pieces, namely, the lens to be detected is guaranteed not to be deviated in the rotating process in an outer diameter positioning mode, when a product without eccentricity condition rotates, the center of a light beam on the eccentricity tester is not changed, if the product without eccentricity condition rotates, the position of the center of the light beam on the eccentricity tester is deviated, and the eccentricity value of the lens to be detected can be obtained according to the display result of the eccentricity tester.
Adopt the technical scheme of this application, through will waiting to detect the lenslet and carry out the veneer with the plane window piece, will wait to detect the facet of product and turn into the big plane of plane window piece, the structure is more stable, the manual operation in the location and the rotation test of the anchor clamps of being convenient for, and the operation is more controllable, can effectively improve efficiency of software testing. Meanwhile, the bearing window piece of the clamp is matched with the conventional clamp of the eccentricity tester, and the outer diameter of the small lens to be detected is positioned through the two clamping pieces, so that the small lens to be detected cannot deviate in the test rotating process, and the test accuracy of the small lens eccentricity value can be improved.
The above embodiments are merely illustrative of the technical solutions of the present invention, and the present invention is not limited to the above embodiments, and any modifications or alterations according to the principles of the present invention should be within the protection scope of the present invention.
Claims (5)
1. An eccentricity detection device of a small-caliber lens is characterized in that: the device comprises a plane window sheet (1) for fixedly mounting a lens (3) to be detected and a clamp (2) for fixing the plane window sheet (1) on an eccentric clamp of an eccentric detector and positioning the rotation of the lens (3) to be detected;
the plane window sheet (1) is a flat transparent material, and the upper surface of the plane window sheet is used for fixedly mounting a lens (3) to be detected;
the bottom of the clamp (2) is provided with a bearing window sheet (21) which is used for being fixedly installed and matched with an eccentric clamp of the eccentric detector, two elastic clamping pieces (22) are arranged on the bearing window piece (21), one end of each elastic clamping piece (22) is fixedly connected on the bearing window piece (21), the other end of each elastic clamping piece can be movably pressed above the plane window piece (1) so as to fixedly clamp the plane window piece (1) between the bearing window piece (21) and the elastic clamping piece (22), the tail ends of the other ends of the two elastic clamping pieces (22) are respectively pressed on different parts of the outer circumferential wall of the lens (3) to be detected, which is fixedly arranged above the plane window piece (1), and are used for positioning the rotation of the lens (3) to be detected during detection, the connecting line between the top pressure point of the lens (3) to be detected and the circle center of the lens (3) to be detected is not on the same straight line at the tail ends of the other ends of the two elastic clamping pieces (22); the bearing window sheet (21) is at least provided with a transparent light-transmitting part or a hollow part at the part which is positioned right below the lens (3) to be detected.
2. The device for detecting decentration of a lens according to claim 1, wherein the lens (3) to be detected is fixedly mounted on the upper surface of the flat window (1) by means of a glue.
3. The device for detecting decentration of a lens according to claim 2, wherein the flat pane (1) and the carrier pane (21) are made of K9 glass.
4. The apparatus for detecting decentering of a lens according to claim 1, wherein the lens to be detected is a plano-concave lens or a plano-convex lens, and an aperture of the lens to be detected is less than 2 mm.
5. A method for detecting decentration of a small-caliber lens using the decentration detecting device according to any one of claims 1 to 4, comprising the steps of:
step 1, fixing a lens (3) to be detected on the upper surface of a plane window sheet (1), wherein the lens (3) to be detected is a plano-concave lens or a plano-convex lens;
step 2, placing the plane window sheet (1) with the lens (3) to be detected in an upward mode between a bearing window sheet (21) and elastic clamping sheets (22) of a clamp (2), fixing the plane window sheet by utilizing the elasticity of the elastic clamping sheets (22), and enabling the tail ends of the other ends of the two elastic clamping sheets (22) to be respectively pressed against different parts of the outer circumferential wall of the lens (3) to be detected;
step 3, fixing the bearing window sheet (21) of the clamp (2) on an eccentric clamp (5) of an eccentric detector (4), and adjusting the position of the eccentric clamp (5) of the eccentric detector (4) to enable a laser light source of the eccentric detector (4) to be positioned above a lens (3) to be detected, wherein a detection laser beam emitted by the laser light source of the eccentric detector (4) just vertically penetrates through the central point of the lens (3) to be detected and is imaged on an imaging system positioned below the lens (3) to be detected;
and 4, pushing the plane window sheet to drive the lens (3) to be detected to rotate at least 360 degrees around the center of the lens (3) to be detected, enabling the tail ends of the other ends of the two elastic clamping pieces (22) to be respectively in contact with the peripheral wall of the lens (3) to be detected in the rotating process, and acquiring the eccentricity value of the lens (3) to be detected according to the eccentricity and the eccentricity position of the detection laser beam imaging position displayed by the imaging system of the eccentricity detector (4) in the rotating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107506.8A CN111175028A (en) | 2020-02-21 | 2020-02-21 | Eccentricity detection device and method for small-caliber lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107506.8A CN111175028A (en) | 2020-02-21 | 2020-02-21 | Eccentricity detection device and method for small-caliber lens |
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| CN111175028A true CN111175028A (en) | 2020-05-19 |
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| CN202010107506.8A Pending CN111175028A (en) | 2020-02-21 | 2020-02-21 | Eccentricity detection device and method for small-caliber lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649701A (en) * | 2020-06-30 | 2020-09-11 | 长春博信光电子有限公司 | Method and device for detecting eccentricity value of toric mirror |
| CN111678402A (en) * | 2020-07-17 | 2020-09-18 | 湖北新华光信息材料有限公司 | Detection apparatus for short-term test type spare is eccentric |
| CN114624010A (en) * | 2022-05-16 | 2022-06-14 | 嘉兴中润光学科技股份有限公司 | Eccentricity testing method |
-
2020
- 2020-02-21 CN CN202010107506.8A patent/CN111175028A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649701A (en) * | 2020-06-30 | 2020-09-11 | 长春博信光电子有限公司 | Method and device for detecting eccentricity value of toric mirror |
| CN111649701B (en) * | 2020-06-30 | 2021-10-29 | 长春博信光电子有限公司 | Method and device for detecting eccentricity value of toric mirror |
| CN111678402A (en) * | 2020-07-17 | 2020-09-18 | 湖北新华光信息材料有限公司 | Detection apparatus for short-term test type spare is eccentric |
| CN114624010A (en) * | 2022-05-16 | 2022-06-14 | 嘉兴中润光学科技股份有限公司 | Eccentricity testing method |
| CN114624010B (en) * | 2022-05-16 | 2022-08-23 | 嘉兴中润光学科技股份有限公司 | Eccentricity testing method |
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