TWI339262B - Testing system and method for eccentricity of a lens - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an optical inspection process, and more particularly to a lens eccentricity detection system and method. [Prior Art] In recent years, due to the explosive growth of the digital information industry, the demand for applications of small-sized optical lenses such as reading and writing lenses, digital cameras, mobile phone cameras, and optical communication has increased significantly. When the axisymmetric optical lens is assembled or assembled in the system, if the optical axis does not coincide with the axis of rotational symmetry, an eccentricity error will occur. The eccentricity error has a critical influence on the imaging quality of small-sized optical lenses. Therefore, the detection and evaluation of eccentricity errors of lenses and lens elements is one of the important steps in the fabrication of high-precision optical lenses. The eccentricity error detection method usually includes mechanical measurement and optical measurement. Optical measurement method is divided into transmissive measurement method and reflective measurement method. Its measurement accuracy is higher than that of mechanical measurement method, and its application is more extensive. Penetration measurement method is to project the cross mark by a collimator. A parallel beam of light is focused on a focus by the lens or lens group to be tested, and another focus is introduced into the eyepiece or CCD (Charge Coupled Devices) by another self-collimator and a suitable objective lens to observe the reflected crosshair. If the optical axis of the optical system deviates from the mechanical rotation axis, the crosshair observed by the eyepiece or the screen will rotate around a certain center, and the radius of rotation will be the lens eccentricity after geometric conversion. In general, the eccentricity detection method of the prior art generally uses the geometric central axis of the lens or lens group as the rotation axis, so that the converted lens eccentricity is an eccentricity with respect to the measurement reference axis, that is, the geometric center axis of the lens. However, with the mold industry such as molding glass forming and injection molding, Form No. A0101 Page 3 of 17 0993346864-0 1339262 I η λ η Λγ η ι~» α **% η ι—B. The development of the boom, injection molding lenses have been used more and more widely, but these injection molding lenses usually have burrs, and there are gaps after the gate cutting process, so the geometric central axis is not easy to determine accurately, and it is easy to produce errors, resulting in The eccentricity measurement results are not accurate enough. Secondly, the lens usually has a central portion and a peripheral portion, and the eccentricity calculated by the rotation of the geometric central axis of the lens includes the error of the peripheral portion, and cannot truly reflect the eccentricity of the central portion of the optical action.

[0005] In view of the above, it is necessary to provide an eccentricity detecting system and method that have high measurement accuracy and can accurately reflect the eccentricity of a lens or a lens group to be tested. SUMMARY OF THE INVENTION [0006] Hereinafter, an eccentricity detecting system capable of accurately determining the eccentricity of a winding piece or a lens group according to an embodiment will be described by way of example [0007] A lens eccentricity detecting system for detecting The lens is subjected to eccentricity detection, the lens to be detected includes a main body portion and a peripheral portion surrounding the main body portion, and the eccentricity detecting system includes a carrying device, a driving device and a detecting device, wherein the carrying device is for holding a lens to be detected, the driving The device is configured to drive the rotation of the carrying device, and the detecting device is configured to perform eccentricity detection on the lens to be inspected, the carrying device has a holding portion matched with an inner diameter of a peripheral portion of the lens to be inspected, an outer diameter of the holding portion and the periphery The inner diameter of the part is equal. [0008] A lens eccentricity detecting system for performing eccentricity detection on a lens to be detected, the lens to be detected includes a main body portion and a peripheral portion surrounding the main body portion, and the eccentricity detecting system includes a carrying device, a driving device and a detecting device, The carrying device has a holding portion for holding a lens to be inspected, and the driving device is for driving the carrying device to rotate, the detecting device 095149818 Form No. 1010101 Page 4 of 17 0993346864-0 [_9] [_9]

[0010]

September 28, 099 Child Replacement Page For the eccentricity detection of the test lens, the outer diameter of the holding device corresponds to the inner diameter of the peripheral portion. The lens eccentricity detecting method includes the steps of: providing a to-be-detected lens and an eccentricity detecting system, the to-be-detected lens comprising a main body portion and a peripheral portion surrounding the main body, the eccentricity detecting system comprising a carrying device, a driving device and a detecting device The carrying device has a holding portion that cooperates with the inner diameter of the edge portion of the lens to be inspected, and the outer diameter of the holding portion is equal to the inner diameter of the peripheral portion; the lens to be inspected is fixed to the holding portion of the carrying device and Aligning the t-axis of the main body with the central axis of the loading device; driving the bearing device and the lens to be detected placed thereon to rotate along the central axis of the main body; detecting the mirror The eccentricity is checked and the lens eccentricity is obtained. V: · a lens eccentricity detecting method, comprising the steps of: providing a to-be-detected lens and an eccentricity detecting system, the to-be-detected lens comprising a main body portion and a peripheral portion surrounding the main body portion, the eccentricity, the judgment: the system is wrapped off a carrying device, a driving device and a detecting device, wherein the object has a holding portion for holding the lens to be inspected, and the inner portion of the peripheral portion of the holding portion is corresponding to the inner portion of the holding portion; a rotating portion, and the central axis of the main body portion coincides with a central axis of the carrying device; the driving device drives the lens to be detected and placed thereon to rotate along the center sleeve of the loading device; the detecting device performs eccentricity on the detecting lens Detection, obtaining lens eccentricity. [0011] In contrast to the flawless technology 095149818, the peripheral part of the lens to be inspected is stuck in the rest of the material section, and the mosquito is waiting for (four) the rotation axis of the lens and the body to be inspected. Coincidence Table No. 1 Page 5 / Total 171 0993346864 1339252 The deviation is the eccentricity of the main part relative to the rotation axis, excluding the gray difference of the periphery 15, and the inspection result is more accurate. Embodiments [0012]

The embodiment of the present technical solution will be further described in detail with reference to the accompanying drawings. [0013] Referring to FIG. 1 and the circle 2, the lens 100 to be inspected in this embodiment is an inner-: piece including the main body portion 110. And the peripheral portion 120. The main body portion I is an optically active portion of the lens, and the shape of the concave or convex shape depends on the optical properties of the specific divergence or convergence. The peripheral portion 12 is a toroidal skin, ih m ,, .

Ma ♦ < Yuan 竽 * r Wang Bei & 叩疋 w hot π A w I and connected to the main body 110, the main role is to place, support adjacent [0014] See Figure f Λ: '<· . ., ..: t:,. ..., q .3⁄4: Turtle.: Ten Commandments, This embodiment provides a system 200, and the eccentricity detection is performed. The eccentricity detecting system includes a carrier 210, a driving device 220, and a detecting device 230. The air bearing device 21 is for holding a lens to be detected, and the driving device 220 is for driving the bearing device 210 to rotate. The detecting device 230 is used for the lens 100 to be inspected.

[0015] The carrying device 21 Q may have the same bearing surface as the surface of the lens to be detected to achieve a close fitting of the two, and the carrying device 21 may also have a recess i_X to embed the lens to be inspected. (10). In this embodiment, the carrying device 210 includes a holding portion 2" and a light through hole 212 opened in the center of the carrying portion 210. The holding portion 2H is an annular body whose outer diameter D is the same as the inner diameter d (see Fig. 2) of the peripheral portion 120 of the mirror month 100 to be detected. The diameter d of the optical through hole 212 of the carrying device 21G, and the lens 095149818 0993346864-0 : ^ 12 ^ ^ ^ of the to-be-detected lens, so as not to affect the detection beam of the light 1339226 099 September 28, the replacement page is inserted, the injection is appropriate . Generally, the diameter D' of the light through hole 212 may be smaller than the diameter of the body portion 120. [0016] The driving device 220 can be rotated by the power device, and can be connected to the carrier device 210 by a belt, a gear or the like. Therefore, the rotation of the driving device 220 can drive the carrier device 210 to perform the same speed or Rotate at different speeds. In this embodiment, the driving device 220 is a cylinder and is connected with the carrying device 210 by a belt 221. Therefore, when the driving device 220 rotates, the belt 221 is driven to move, and the movement of the belt 221 drives the carrying device® 210. Rotate around the central axis. [0017] The detecting device 230 includes an eccentric shape for the lens 100 to be detected

• The microscope unit 2 31 for the -V condition detection and the display 232 for the eccentricity of the lens 100 to be detected. The display micro-mirror unit 231 is disposed coaxially with the carrier device 210 and coupled to the display 232. The microscope unit 231 can be a transmissive, reflective or refractive microscope. In this embodiment, the microscope unit 231 is a transmissive microscope, and includes a light source 233, a projection lens 234 marked with a projection mark 24.1, a first lens 235, and a second lens 236, which are marked with correction, in the direction of the optical axis. The correcting lens 237 and the third lens 238 of the mark 242. The light source 233 is used to emit a detection beam, and an ordinary light source or a laser light source may be selected depending on the measurement accuracy requirement. Generally speaking, the measurement accuracy of an ordinary light source is 10 seconds, and the measurement accuracy of a laser light source is 5 seconds. A projection lens 234 and a first lens 235 are disposed between the light source 233 and the carrier device 21 0 where the lens 100 to be inspected is to be placed, along the direction of the detection beam. The projection lens 234 has a cross-shaped projection mark 241, and the first lens 235 can divergence the beam. . The second lens 236, the correcting lens 237 and the third lens 238 are sequentially disposed on the carrying device 210 along the direction of the detecting beam. 095149818 Form No. A0101 Page 7 / Total 17 Page 0993346864-0 1339262 [0018] [0020] [0012] [0024] [0024] [0024] [0024] 095149818 I uj month 2G day child replacement page side 'second lens 236 can converge the beam, correction lens 237 has a cross-shaped correction mark 242, third lens 238 for diverging the beam . The display 232 is disposed on the upper side of the microscope unit 231, and can display an image of the projection mark 241 and the correction mark 242 formed after the detection beam passes through the plurality of optical elements, for the operator to observe and record the position of the two marks. Of course, the 5H detection device 230 can further include a mobile platform and an angle sensor. The mobile platform is used for fixing the carrying device 21〇 and the driving device 22〇, so that the lens placed on the loading device 210 is moved into or out of the predetermined detecting position according to the detection requirement. The angle sensor is used to sense the rotation angle of the carrying device 210, and the operator can obtain the specific window of the two marks when rotating to a specific angle. The detection method of the heart detection system. In the first step, the lens 100 to be inspected and the eccentricity detecting system 2 are provided. A lens 100 to be inspected as shown in Figs. 1 and 2 and a mirror & sheet eccentricity detecting system 2 shown in Fig. 3 are provided. In the second step, the lens 100 to be inspected is placed on the carrying device 21A. Referring to FIG. 4, when the mirror Μ 00 to be inspected is placed on the carrying device 210, since the inner diameter d of the peripheral portion 120 is the same as the outer diameter D of the retaining portion 211 of the carrying device 21, the peripheral portion 12 can be rigidly clamped. Outside the holding portion 211, the main body 110 is fixed on the carrying device 21A. Thus, by clamping the perimeter. The internal control of 1$120 can set the lens to be inspected to the loading device 210, and ensure that the center wheel of the main Zhao 11 is coincident with the center sleeve of the carrying device 21〇 Form No. A0101 0993346864-0 1339262 September 28, 2008 Just after the third step of the Geng positive replacement page, the driving device 220 drives the carrying device 210 and the lens 1 to be detected on the rotating device 1 to rotate. The central axis coincides with the central axis of the main body portion 11A, so that the driving device drives the carrier device 210 and the lens 100 to be detected to rotate with the center sleeve of the main body portion 110. In the fourth step, the detecting device 23 performs the eccentricity detection on the detecting lens, and Φ obtains the eccentricity of the lens. In other words, the visible beam or the laser beam emitted by the system 233 passes through the projection mirror with the projection mark 241, "1, _235, the lens 100 to be inspected, the second lens 236 and the correction lens 237 of _2". With the third lens 238, the projection mark formed by the last beam (4) the image of the disc correction mark 242 is displayed in the display milk 1, and the cross-shaped projection mark 241 of the projection lens "234" is imaged by the to-be-detected lens (4) and displayed on the display 232, corrected. Lens: 237 cross-shaped correction mark (4) without the lens to be detected _ imaging is displayed on the display 232, so the position of the image of the two marks can be obtained by the operator to obtain the eccentricity of the lens to be detected. If the lens to be detected is eccentric, the display The hunger will show that the image of the cast 241 rotates around the correction mark with a certain radius, and rotates the half position to convert the eccentric amount of the lens to be detected. In the present case, the eccentric amount is relative to the main body 110. The rotating shaft is the eccentric amount of the central mandrel 11 。. The advantage of the system and method is that the lens to be detected is eccentrically detected by taking the center of the main body as a rotary rotation. The deviation: the amount of 095149818, the number of the cerebral palsy, 9 pages, a total of 17 pages, 0993346864-0 [0030] 1339262 [0033] [0034] [0035] [0036] [0038] [0039] [0040] [0041] I 099 0% 23 5 g positive strips ~] is the eccentricity of the main body relative to the axis of rotation of the lens to be inspected, excluding the error of the peripheral portion, the detection result is more accurate. As described above, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, and the present invention is familiar to the case. The equivalent modifications or variations of the skilled person in the spirit of the present invention are intended to be included in the scope of the following claims. [FIG. 1] FIG. 1 is a schematic view of a lens to be inspected provided by an embodiment of the present technical solution.

FIG. 2 is a cross-sectional view of the embodiment of the present technical solution taken along the Π-Π direction of FIG. 1 . V

."I Figure 3 is an embodiment of the technical solution: & FIG. 4 is a schematic diagram of a lens eccentricity detection state according to an embodiment of the present technical solution. [Description of main component symbols] 100: lens to be inspected 110: main body portion 120: peripheral portion 200: eccentricity detecting system 210: holding device 211: holding portion 212: optical through hole

095149818 Form No. 1010101 Page 10/Total 17 Page 0993346864-0 1339262 September 28, 2008, Nuclear Replacement Page [0042] 220: Drive [0043] 221: Belt [0044] 230: Detection device [0045] 231: Microscope unit [0046] 232: Display [0047] 2 3 3 : Light source • [0048] 234: Projection lens [0049] 235: First lens [0050] 236: Second lens " [0051] 237: Correction lens [ 0052] 238: third lens [0053] 241: projection mark. _ [0054] 242: correction mark 095149818 form number A0101 page 11/total 17 page 0993346864-0

Claims (1)

1339262 I os month π 5 yan is replacing π I VII. Patent application scope: 1. A lens eccentricity detecting system for eccentricity detection of a lens to be detected, the lens to be detected comprising a body portion and a periphery surrounding the body portion The eccentricity detecting system includes a carrying device, a driving device and a detecting device, wherein the carrying device is for holding a lens to be detected, the driving device is for driving the rotating device, and the detecting device is configured to perform a lens to be detected. The eccentricity detection is improved in that the carrying device has a holding portion that cooperates with an inner diameter of a peripheral portion of the lens to be inspected, and the holding portion has an annular shape, and an outer diameter of the holding portion is equal to an inner diameter of the peripheral portion. The inner diameter of the retaining portion is smaller than the diameter of the main body. 2. The speculation as described in claim 1; the system, wherein the vine field; the drive unit is vortexed by a belt or a toothed belt. The ft Θ eccentricity inspection system according to claim 1, wherein the detection device includes a microscope unit for detecting an eccentricity of the lens to be inspected, and A display for displaying the eccentricity of the lens to be inspected. 4. The lens eccentricity detecting system according to claim 3, wherein the microscope unit is one selected from the group consisting of a transmissive, reflective or refractive microscope. 5. The lens eccentricity detecting system according to claim 3, wherein the microscope unit comprises a projection mark located at a lower portion of the lens to be inspected. 6. The lens eccentricity detecting system of claim 3, wherein the microscope unit comprises a calibration mark between the lens to be inspected and the display. 7. The lens eccentricity detecting system of claim 1, wherein the detecting device further comprises a moving platform and an angle sensor. 095149818 Form No. 1010101 Page 12/Total 17 Page 0993346864-0 1339262 __ September 28, 1999, Nuclear Replacement Page 8 - A method for detecting eccentricity of a lens, including the steps of: providing a lens to be inspected and an eccentricity detecting system, The detection lens package includes a main body portion and a peripheral portion surrounding the main body portion, and the eccentricity detecting system includes a carrying device, a driving device and a detecting device, and the carrying device has a holding portion matched with an inner diameter of a peripheral portion of the lens to be detected, The holding portion has an annular shape, the outer diameter of the holding portion is equal to the inner diameter of the peripheral portion, and the inner diameter of the holding portion is smaller than the diameter of the main body portion; the lens to be inspected is fixed on the carrying device, so that the peripheral portion is stuck Fixing on the outside of the holding device Φ, the main body portion is fixed on the carrying device, and the central axis of the main body portion is coincident with the central axis of the carrying device; the driving device drives the carrying device and is placed on the 'to be detected The lens rotates along the central axis of the body yr and the part; the φ detecting device performs eccentricity detection on the rotating lens to be detected to obtain the eccentricity of the lens. 095149818 Form No. A0101 Page 13 of 17 0993346864-0