CN105987806B - Testing device and testing method for turning lens - Google Patents
Testing device and testing method for turning lens Download PDFInfo
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- CN105987806B CN105987806B CN201510052436.XA CN201510052436A CN105987806B CN 105987806 B CN105987806 B CN 105987806B CN 201510052436 A CN201510052436 A CN 201510052436A CN 105987806 B CN105987806 B CN 105987806B
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Abstract
The invention relates to a test device of a turning lens, comprising: the test light source passes through the turning lens to form a turning test light; and the test identification system is used for identifying the test result of the turning lens, wherein the turning test light is projected to the test identification system from the side surface of the turning lens, and the resolution, the field angle or the optical axis information of the turning lens is acquired through the identification of the turning test light by the test identification system.
Description
Technical Field
The present invention relates to an optical testing device and method, and more particularly, to a method and a device for testing resolution and field angle of a turning lens and measuring an optical axis of a turning lens with a prism.
Background
With the development of three-dimensional imaging lenses, it becomes increasingly difficult to detect the performance of a novel lens by using a traditional test method, especially for a single turning lens. The existing professional lens test generally adopts a detection method based on a triotics optical measurement system, but the method aims at the test of a conventional lens, lens groups in the conventional lens are linearly arranged, light enters from one end of the linear lens and exits from the other end along the same direction, and a light path in the conventional lens has no turning process. In the process of detecting the single lens, the design principle of the conventional testing method is that the optical path turning process is not considered according to the straight-line type optical path, so that it is difficult to test performance indexes of the turning optical path lens, such as the resolution, the field angle and the optical axis of the lens.
More specifically, referring to the test method of the conventional lens 10 'in fig. 1, a single slit optical system is used for detecting the resolution and the field angle in the conventional lens 10'. The resolution of the lens refers to the ability to distinguish two adjacent point light sources, that is, the ability to distinguish a fine distance, the field angle of the lens refers to an included angle formed by two edges of the maximum range of the lens through which an object image of a detected object can pass, the size of the field angle determines the field range of the optical instrument, and if the object exceeds the field angle, the object cannot be received in the lens. The optical system comprises a collimator 20 'and an image collector 30', the collimator 20 'images the image of the single slit to infinity, the image quality is degraded to a certain extent due to the diffraction effect in the sample conventional lens 10', the image collector 30 'is used for collecting the slit image passing through the sample, and the resolution of the sample of the conventional lens 10' can be obtained through Fourier transform. Then, the collimator 20 ' is rotated to a preset position through an off-axis angle 21 ', the image of the single slit is imaged to infinity, the image is collected by the image collector 30 ' after passing through a conventional lens 10 ', and the field angle information can be converted by comparing the heights of the slit images collected by the image collectors 30 ' with different rotation angles. The optical system aims at a linear lens, and the detection of the refractive optical lens cannot be realized. In other words, the image collector 30' cannot effectively detect the slit image passing through the lens of the turning optical path, and thus cannot obtain the resolution and the field angle of the lens sample.
The coincidence degree of the actual optical axis of the lens and the design value thereof is an important index for evaluating the quality of the lens, wherein the optical axis of the lens is essentially the property of keeping the original incident light direction, in an ideal lens system, the optical axis refers to the connection line of the curvature centers of all the spherical surfaces, but in the actual optical lens, the centers of the plurality of spherical surfaces are difficult to ensure to be absolutely and correctly positioned on the same straight line, when the offset of the optical axis is larger, the optical axis of the lens cannot keep the original incident light direction, the test and correction are required to be carried out in time, and particularly for the catadioptric lens, the coincidence degree of the actual optical axis and the design value is higher. If the offset of the optical axis of the lens is too large, the position of the field of view is greatly affected, and performance indexes such as the field angle of the lens are also affected. The method is characterized in that a testing step which is necessary for detecting the optical axis of the lens with the lens before the turning lens is assembled is directly related to the quality and the yield of subsequent finished products, if the optical axis of the lens is not qualified, blind assembly is completed to detect a series of indexes such as the angle of view, the resolution ratio and the like, the test of the angle of view can be difficult to pass, and then repair processing is carried out, so that a large amount of manpower and material resources are wasted, and the manufacturing cost and the production time of the lens are increased. However, there is no method for measuring the optical axis of the lens in a relatively simple, effective and large batch manner, so how to overcome various problems of the novel turning lens in the testing process, that is, how to quickly test the resolution, the field angle and the optical axis of the novel turning lens becomes a problem to be solved by the present invention.
Disclosure of Invention
The present invention is directed to a testing apparatus and method for a bending lens, which effectively tests different optical performance indexes of various bending lenses through a bending test light.
Another objective of the present invention is to provide a testing apparatus and method for a bending lens, which are used to solve the problems of resolution and angle of view testing of various bending lenses and optical axis measurement of various bending lenses with prisms.
Another objective of the present invention is to provide a testing apparatus and method for a turning lens, which provides a testing recognition system for obtaining the resolution, the field angle or the optical axis information of the turning lens through the recognition of the turning test light by the testing recognition system.
Another objective of the present invention is to provide a testing apparatus and method for turning lenses, wherein the resolution capability and the field angle of each turning lens can be tested based on the imaging recognition of a first turning test light by a first test recognition system.
Another objective of the present invention is to provide a turning lens testing device and method, wherein the optical axis offset of various turning lenses with prisms can be measured based on the visual recognition of a second turning test light by a second test recognition system, so as to quickly obtain the offset angle between the actual optical axis of the turning lens and the design value.
Another objective of the present invention is to provide a device and a method for testing a turning lens, wherein the operation of the second test recognition system in cooperation with the second turning test light is simple, fast and suitable for measuring the optical axis of the turning lens in a large scale.
Another objective of the present invention is to provide a testing apparatus and method for a bending lens, wherein no matter whether the resolution, the field of view angle or the optical axis of the bending lens is tested, no complicated mechanical manufacturing steps and apparatus are required, and no inspection is required after the bending lens is assembled, so that a single bending lens can be tested quickly.
Another objective of the present invention is to provide a testing apparatus and method for a turning lens, wherein when the first testing recognition system performs an imaging test, the turning lens can be tested according to the imaging performance of the turning lens without being accurately fixed to an image sensor, so as to facilitate performance tests of resolution, field angle, and the like for the individual turning lens, and shorten the testing time for the turning lens.
Another objective of the present invention is to provide a testing apparatus and method for a turning lens, which successfully provides an economical and effective way to solve the problem that a single slit optical system cannot test the resolution and the field angle of the turning lens, and is helpful to quickly test performance indexes such as the resolution and the field angle of an individual turning lens.
Another objective of the present invention is to provide a testing apparatus and method for a turning lens, which can simplify the testing steps, save the testing time, and help to improve the precision and effect of the testing.
Accordingly, in order to achieve the above mentioned objective, the present invention provides a testing apparatus for a bending lens, which includes a testing light source, wherein the testing light source passes through the bending lens to form a bending testing light; and the test identification system is used for identifying the test result of the turning lens, wherein the turning test light is projected to the test identification system from the side surface of the turning lens.
According to an embodiment of the present invention, the test light source faces one end of the turning lens, and the test recognition system faces the other end of the turning lens, and is adapted to the projection direction of the turning test light.
According to an embodiment of the present invention, the testing apparatus further includes a testing target plate adjacent to the testing light source and facing the turning lens for bringing testing target plate information into the turning testing light.
According to an embodiment of the present invention, the test light source is an infrared light source, and the infrared light source is disposed at a back side of the test target plate and is configured to project infrared light to the turning lens through the test target plate.
According to an embodiment of the present invention, the test recognition system includes an image capturing tool and a processor coupled to the image capturing tool for imaging and recognizing the turning test light passing through the turning lens.
According to an embodiment of the present invention, the test light source is disposed at a longitudinal side of the turning lens, and the image capturing fixture is disposed at a transverse side of the turning lens, so that light rays enter the turning lens from the test light source longitudinally and project to the image capturing fixture transversely.
According to an embodiment of the present invention, the test recognition system includes an optical axis testing body, the optical axis testing body forming a testing chamber for placing the bending lens; and the measuring structure is arranged on the optical axis testing main body and is used for uniformly forming a series of measuring scales around the optical axis testing main body, so that the optical axis of the turning lens is measured in a visual reading mode.
According to an embodiment of the present invention, the testing apparatus further comprises a holding device, the holding device comprises a lens holder and a light source holder aligned with the lens holder, the lens holder is used for mounting the bending lens, the light source holder is used for mounting the light source emitter, and the holding device is adapted to keep the lens center and the light source center on the same line.
According to an embodiment of the present invention, the testing device further includes a standard prism, which is installed in a turning lens barrel of the turning lens to be tested, so as to turn the light in the turning lens barrel to form the turning test light.
According to one embodiment of the invention, the test light source is a laser emitter for emitting laser light.
According to one embodiment of the present invention, the optical axis test body has a base and a test wall extending upward from the base, wherein the lens holder is centrally disposed on the base, and the light source holder extends from the test wall toward the lens holder to be aligned with the lens holder.
According to one embodiment of the invention, the measuring structure comprises a marking which is uniformly provided on the test wall for forming a series of measuring scales on the test wall.
According to one embodiment of the invention, the turning test light is projected to the marking part of the test wall from the side direction of the laser incident light, so that the corresponding scale of the laser emergent light can be visually recognized.
According to an embodiment of the present invention, the measuring structure further comprises a plurality of protruding units extending from the testing wall to the testing chamber and protruding from other markers on the testing wall, and a plurality of display units corresponding to the protruding units, wherein the display units are provided at intervals on the base adjacent to each protruding unit for displaying the measuring scale of the protruding units.
According to an embodiment of the invention, the measuring structure has a positioning line and a standard line, the positioning line is symmetrically arranged on the protruding unit of the test wall, wherein the test light source is arranged on the positioning line, and the standard line is opposite to the standard line, and the emission position of the test light source is corrected by the standard line.
According to an embodiment of the invention, the measuring structure further has a center line, which is provided at a central cross section of the test wall for confirming the light projection position.
According to an embodiment of the present invention, the display unit sequentially displays the highlighting unit scales as 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 with the location line as an origin.
A method of testing a breakover lens, the method comprising the steps of:
(A) projecting light to the turning lens through a test light source;
(B) forming a turning test light ray through the turning lens; and
(C) the turning test light is projected to a test identification system from the side surface of the turning lens so as to identify the test performance of the turning test light on the turning lens and acquire test information.
According to one embodiment of the present invention, the test method further comprises the step (D): and enabling the test light source to face one end of the turning lens, and enabling the test identification system to face the other side end of the turning lens, so as to be suitable for the projection direction of the turning test light.
According to one embodiment of the invention, said step (a) comprises a step (a.1): the test light source projects light to the turning lens through a test target plate so as to bring the test target plate information into the turning test light.
According to one embodiment of the invention, said step (C) comprises a step (c.1): and imaging and identifying the turning test light rays through the test identification system so as to identify the resolution and the field angle of the turning lens.
According to one embodiment of the invention, said step (I) comprises a step (i.1): the light enters from the longitudinal direction of the turning lens, is turned by a light turning element of the turning lens and is emitted from the transverse direction of the turning lens to form the turning test light.
According to one embodiment of the invention, said step (c.1) comprises the steps of:
(C.1.1) transversely projecting the turning test light to an image acquisition tool of the test recognition system so as to acquire image information of the test standard plate through the turning lens in a shooting and imaging mode; and
(C.1.2) the image acquisition tool transmits the image information of the turning test light to a processor of the test recognition system for processing the acquired image information so as to obtain the test result of the resolution and the field angle of the turning lens.
According to one embodiment of the invention, said step (a) comprises a step (a.a): and projecting light rays to the turning lens through the test light source so as to be used for projecting laser to the turning lens.
According to one embodiment of the invention, said step (C) comprises a step (C.a): the test recognition system visually recognizes the turning test light, so that the optical axis of the turning lens can be measured.
According to one embodiment of the invention, said step (a.a) comprises the steps of:
(a.a.1) placing the test light source on a positioning line of a test wall for emitting laser light;
(A.a.2) arranging a turning lens cone at the center of a test cavity, aligning the test light source, and enabling the center of the light source to be on the same straight line with the lens; and
(A.a.3) the test light source projects laser to the center of a turning lens barrel of the turning lens;
according to one embodiment of the invention, between the steps (a.a.1) and (a.a.2) further comprises a step (a.a.4): and correcting the position of the test light source, and projecting the test light source from the positioning line to a calibration line so that the laser is projected to a central line of the calibration line to ensure the projection direction of the test light source.
According to one embodiment of the invention, said step (a.a.2) further comprises the steps of:
(A.a.2.1) mounting a standard prism on the turning lens cone; and
(A.a.2.2) placing the turning lens barrel with the standard prism on a lens holder, wherein the lens holder is aligned with a light source holder where the test light source is located.
According to one embodiment of the invention, said step (B) comprises a step (b.a): the laser emitted by the test light source enters from the transverse direction of the turning lens cone, is reflected and turned by the standard prism of the turning lens cone and is emitted from the longitudinal direction of the turning lens cone to form the turning test light.
According to one embodiment of the invention, said step (C.a) comprises step (c.a.1): the turning test light is projected to an identification part of the test wall from the side direction of the laser incident light, so that the corresponding scale of the laser emergent light can be visually identified.
According to one embodiment of the present invention, the test method further comprises the step (E): and comparing the design value of the turning lens cone with the measured value of the identification part to obtain the actual optical axis offset of the turning lens cone.
Drawings
Fig. 1 is a perspective view of a single slit optical system according to the prior art.
Fig. 2 is a schematic block diagram according to a preferred embodiment of the present invention.
Fig. 3 is a working perspective view for testing the resolution and the field angle of the bending lens according to the above preferred embodiment of the present invention.
Fig. 4 is a working diagram for testing the resolution and the field angle of the bending lens according to the above preferred embodiment of the present invention.
Fig. 5 is a perspective view of a system for measuring an optical axis of a bending lens according to the above preferred embodiment of the present invention.
Fig. 6 is a schematic diagram of the operation of measuring the optical axis of the bending lens according to the above preferred embodiment of the present invention.
Fig. 7 is a schematic diagram of a test flow of the turning lens according to the above preferred embodiment of the present invention.
Fig. 8 is a flow chart illustrating a test procedure of the resolution and the field angle of the turning lens according to the above preferred embodiment of the present invention.
Fig. 9 is a schematic flow chart of optical axis measurement of the turning lens according to the above preferred embodiment of the present invention.
Detailed Description
The technical scheme of the invention is specifically as follows according to the contents disclosed in the claims and the specification of the invention.
As shown in fig. 2, the testing apparatus for testing the optical performance of the bending lens 10 is provided, the testing apparatus includes a testing light source 20, the testing light source 20 passes through the bending lens 10 to form a bending testing light 200; and a test recognition system 30,40 for recognizing the test result of the turning lens 10, wherein the turning test light 200 passes through one end of the turning lens 10 and projects from the other end to the test recognition system 30,40, and different optical performance indexes of various turning lenses 10 can be effectively tested by analyzing the turning test light 200.
The turning lens 10 is a novel three-dimensional imaging device, the turning lens 10 includes a turning lens barrel 11 and a light conversion element 12, and the light conversion element 12 is obliquely disposed at a turning position of the turning lens 10 to convert the projection light entering the turning lens barrel 11, which is helpful for reducing the thickness of the turning lens 10. The turning lens barrel 11 comprises a series of lens assemblies, one end of the turning lens 10 is provided with an emitting lens 111, the other end of the turning lens 10 is provided with a condensing lens group 112, in other words, the condensing lens group 112 is arranged in the transverse direction of the turning lens barrel 11, the emitting lens 111 is arranged in the longitudinal direction of the turning lens barrel 11, and light can enter from the transverse condensing lens group 112 and then be projected from the longitudinal emitting lens 111 through the light-converting element 12, or light can enter from the longitudinal emitting lens 111 and then be projected from the transverse condensing lens group 112.
The turning test light 200 designed according to the turning lens 10 can be applied to the resolution and field angle test of various turning lenses 10 and the optical axis measurement of various turning lenses 10 with prisms, and the test identification system 30,40 identifies the turning test light 200 to obtain the resolution and field angle test or the optical axis measurement information of the turning lens 10, thereby effectively solving the problem that the conventional test technology cannot be applied to the test of the novel turning lens 10.
The test light source 20 includes a first test light source 21 and a second test light source 22, the first test light source 21 passes through the turning lens 10 to form a first turning test light 201, and the second test light source 22 passes through the turning lens 10 to form a second turning test light 202. The identification system comprises a first test identification system 30 and a second test identification system 40, wherein the resolution and the field angle of the bending lens 10 can be tested based on the imaging identification of the first bending test light 201 by the first test identification system 30, and the optical axis offset of various bending lenses 10 with prisms can be measured based on the visual identification of the second bending test light 202 by the second test identification system 40, so that the offset between the actual optical axis of the bending lens 10 and the design value can be rapidly acquired.
Fig. 3 to 4 show an apparatus for testing the resolution and the field angle of a bending lens 10, in which the first testing light source 21 cooperates with the first testing recognition system 30 to obtain the index of the resolution and the field angle of the bending lens 10 by shooting and imaging. The testing apparatus further includes a testing target 212, wherein the testing target 212 is adjacent to the first testing light source 21 and faces the turning lens 10, so as to bring testing target information into the turning testing light. The first test light source 21 is an infrared light source 211 for projecting infrared light 211 through the test target 212 to the turning lens 10, and when the resolution and the field angle of the turning lens 10 are tested, the test target 212 selects the resolution target, wherein the infrared light source 211 is disposed on the back side of the test target 212, the test target 212 faces the turning lens 10, and the emitting lens 111 of the turning lens 10 is aligned to the center of the test target 212. The first test recognition system 30 includes an image capturing tool 31 and a processor 32, the image capturing tool 31 is disposed on a side surface of the turning lens 10 for capturing an image of the test target 212 through the turning lens 10 by a direct shooting method, wherein the image capturing tool 31 is coupled to the processor 32, and the processor 32 is configured to monitor the image capturing tool 31 and process the captured image, so as to obtain a test result of a resolution and a field angle of the turning lens 10 through data analysis and calculation and interpretation.
The bending lens 10 independently corresponds to the image capturing tool 31, so that the single bending lens 10 can be directly tested without assembly. The emitting lens 111 of the turning lens 10 faces the test target plate 212 upwards, the condensing lens set 112 of the turning lens 10 transversely faces the image collecting tool 31, that is, the image collecting tool 31 extends transversely from the turning lens 10, the test target plate 212 extends longitudinally from the turning lens 10, the image collecting tool 31, the turning lens 10 and the test target plate 212 are not arranged in the same direction, and according to the turning design of the turning lens 10, the image collecting tool 31 and the first test light source 21 respectively face the two turning sides of the turning lens 10 and are not on the same straight line, so that the test requirements of the turning lens 10 can be met.
Since the turning lens selects infrared light emission when in use, the infrared light source 211 is used for emitting infrared light, and the information of the test target 212 is brought into the turning lens 10, so that the turning lens is suitable for the use of the turning lens 10 through infrared light detection. The infrared light source 211 projects infrared light 211 to the turning lens 10 through the test target plate 212, the infrared light 211 is longitudinally projected into the turning lens 10 from the projecting lens 111, the projecting direction of the infrared light 211 is changed through reflection or refraction of the turning element, the infrared light 211 is transversely projected from the longitudinal projection to the transverse projection through the converging lens group, the turning test light 200 is formed through the converging lens group, the turning test light 200 is transversely projected to the image acquisition tool 31, shooting and imaging of the test target plate 212 by the turning lens 10 are realized, and the resolution and the field angle of the turning lens 10 are obtained through calculating and interpreting pictures.
When the first testing and recognizing system 30 performs an imaging test, the test can be performed according to the imaging performance of the bending lens 10 without accurately fixing the bending lens 10 to an image sensor, so that the performance tests of the resolution, the field angle and the like of the single bending lens 10 can be performed conveniently, and the testing time of the bending lens 10 can be shortened. The invention successfully provides an economic and effective mode to solve the problem that the single-slit optical system cannot test the resolution and the field angle of the bending lens 10, and is beneficial to quickly testing performance indexes such as the resolution, the field angle and the like of the single bending lens 10.
Fig. 5 shows an optical axis measuring device of the bending lens 10, which includes the second testing light source 22 and the second testing identification system 40 cooperating with the second testing light source 22, and obtains the optical axis offset of the bending lens 10 by means of visual reading.
The optical axis measuring device of the bending lens 10 comprises an optical axis testing body 41, wherein the optical axis testing body 41 forms a testing cavity 413 for placing the bending lens 10; a light source emitter 42, said light source emitter 42 providing a second test light source 22 to said turning lens 10, such that said test light source 20 projects in said test chamber 413 to form said second turning test light 202 through said turning lens 10; and a measuring structure 43, wherein the measuring structure 43 is disposed on a testing wall 412 of the optical axis testing body 41, and is used for marking the projection position of the second testing light source 22 from one end of the testing cavity 413 to the other end, so as to measure the optical axis offset of the bending lens 10 in an intuitive reading manner.
The optical axis measuring device of the bending lens 10 further includes a holding device 44, the holding device 44 includes a lens holder 441 and a light source holder 442 aligned with the lens holder 441, the lens holder 441 is used for mounting the bending lens 10, the light source holder 442 is used for mounting the light source emitter 42, so that the bending lens 10 is aligned with the center of the light source emitter 42.
The optical axis testing body 41 is a disc structure, and the testing wall 412 extends upwards from the outer edge of a base 411 of the optical axis testing body 41 and is annularly arranged on the base 411. The test wall 412 may extend integrally from the base 411 or may be detachably mounted on the base 411, so that different performance tests of various lenses can be performed through the combination of the test wall 412 with different functions and the base 411, thereby improving the versatility of the optical axis test main body 41.
The light source holder 442 is disposed on the testing wall 412 of the optical axis testing body 41, and the lens holder 441 is disposed at a center of the base 411 and aligned with the light source holder 442, so that the light emitted from the light source holder 442 passes through the center line 436 of the lens holder 441, that is, the lens holder 441 and the light source holder 442 are designed such that a light source center and a lens center are on the same straight line, which helps to ensure that the second testing light source 22 is aligned with the lens center.
The measuring structure 43 comprises a mark 431, and the mark 431 is uniformly arranged on the test wall 412 and used for forming a series of measuring scales on the test wall 412 so as to display the projection angle of the second test light source 22 in the test cavity 413; a plurality of protruding elements 432, the protruding elements 432 extending inwardly from the logo 431 on the test wall 412 in a spaced apart relationship; and a plurality of display units 433 corresponding to the plurality of the projection units 432, the display units 433 being spaced apart from each other on the base 411 adjacent to each of the plurality of the projection units 432 for displaying a measurement scale of the plurality of the projection units 432, thereby facilitating direct reading of the projection angle of the second test light source 22.
The mark part 431 has a plurality of mark lines vertically disposed on the inner surface of the test wall 412 to form the preset measurement scale for uniformly dividing the test wall 412 to form a 360-degree scale, and preferably, the number of degrees represented by every two mark lines is 6 °. The mark 431 is provided with a positioning line 434 and a calibration line 435, the positioning line 434 and the calibration line 435 are respectively symmetrically arranged on two sides of the protruding unit 432 of the testing wall 412, the positioning line 434 is used as an origin 0, the calibration line 435 is scaled by 180 corresponding to the display unit 433, that is, the calibration line 435 is located right opposite to the positioning line 434, and the positioning line 434 and the calibration line 435 are on the same straight line. Starting from the positioning line 434, the measurement scales of the protruding units 432 are displayed in a clockwise direction, the display units 433 corresponding to the protruding units 432 are respectively 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, and different measurement scales can be displayed according to different requirements. That is, every two protruding units 432 represent 30 degrees, four identification lines are provided between every two protruding units 432 to form 5 measurement cells, each measurement cell represents 6 degrees, and the measurement scale is highlighted every 30 degrees from 0 degrees by the protruding units 432 for displaying the size scale of the longitudinal section, which facilitates quick and intuitive reading of data.
It should be noted that a center line 436 is disposed in the middle of the test wall 412, and the center line 436 is located at the central cross section of the test wall 412 for determining the accuracy of the projection position of the second test light source 22, so as to ensure that the second test light source 22 is projected at the center line 436 without deviating from the center line 436, thereby effectively reading the projection angle of the second test light source 22.
The light source holder 442 is disposed at the positioning line 434, and the lens holder 441 is disposed at a central position between the positioning line 434 and the calibration line 435, wherein a predetermined interval is formed between the light source holders 442 for holding the light source emitter 42, the light source emitter 42 passes through the test wall 412, and the light source holder 442 is disposed at the positioning line 434 so that the light source emitter 42 is aligned with the lens holder 441 and faces the calibration line 435.
The measured lens can be a linear lens, the linear lens refers to that all lenses are in the same linear direction, or can be a turning lens 10, when various turning lenses 10 with prisms are detected, the actually detected turning lens barrel 11 with an emitting lens 111 and a condensing lens group 112 is detected, and the standard prism 121 selected by the light-converting element 12 of the turning lens 10 can be used for independently measuring the optical axis of the turning lens barrel 11 and comparing the coincidence of the lens optical axis in the turning lens barrel 11 and a design value.
The standard prism 121 is installed in the turning lens barrel 11 during testing, and is used as a light conversion element 12 to simulate a turning light of the turning lens 10 in practical application, so as to measure an optical axis of the turning lens barrel 11 alone.
The light source emitter 42 may be selected to be a laser emitter, a laser diode, or the like for emitting laser light 221 as the test light source 20 for optical axis measurement, and in this embodiment, is selected to be a laser emitter. The light source emitter 42 is mounted in the middle of the light source holder 442, that is, in the middle of the positioning line 434, the laser 221 emitted by the light source emitter 42 can be projected onto the calibration line 435 through the center line 436 of the lens holder 441, when the turning barrel 11 with the standard prism 121 is placed on the lens holder 441, the laser 221 can be projected laterally through the reflection of the center line 436 of the turning barrel 11 and the standard prism 121 to form the turning test light 200, that is, the turning test laser 221 is projected onto the mark portion 431 of the test wall 412 at a certain turning angle, which is determined by the position of the optical axis and the reflection angle of the light from the light conversion element 12.
Before the optical axis measurement of the turning lens barrel 11 is performed, the test subject needs to be corrected first to ensure that the light emitted from the 0-scale position by the laser 221 is projected to the opposite 180-scale position, and meanwhile, the longitudinal section direction of the laser 221 is just on the central line 436, which is beneficial to improving the accuracy of the optical axis measurement.
When the optical axis of the turning lens barrel 11 is measured, the standard prism 121 is mounted on the turning lens barrel 11 to be tested, and then the turning lens barrel 11 is placed on the lens holding frame 441 at the center of the testing cavity 413. Aligning the light source emitter 42 with the turning lens barrel 11, emitting the second test light source 22 to one end of the turning lens barrel 11, forming the turning test laser 221 by the second test light source 22 through the standard prism 121 in the turning lens barrel 11, reflecting the turning test laser 221 by the standard prism 121, projecting the turning test laser 221 outwards from the other end of the turning lens barrel 11, projecting the turning test laser 221 to the identification portion 431 on the test wall 412, visually reading the scale corresponding to the turning test laser 221, and comparing with the design value, thereby obtaining the two-dimensional offset of the actual optical axis of the turning lens barrel 11.
In other words, the light source emitter 42 projects the transverse light to the condenser lens group 112 of the turning barrel 11, the second turning test light 202 formed by the reflection of the standard prism 121 is projected longitudinally from the exit lens 111 of the turning column 11 to the lateral position of the 90 or 270 scale direction of the side surface of the test wall 412, i.e. the lateral position of 0 to 180 sides, further determining the projection angle of the second turning test light 202, so as to quickly obtain the actual optical axis offset of the turning lens barrel 11, if the quality of the lens does not reach the standard, the folded lens barrel 11 needs to be repaired to ensure that the quality of the finished product of the folded lens 10 reaches the standard, the second test identification system 40 is simple, fast and convenient to operate in cooperation with the second bending test light 202, and is suitable for measuring the optical axis of the bending lens 10 in a large scale.
No matter whether the resolution, the field angle or the optical axis of the bending lens 10 is tested or measured, no complicated mechanical manufacturing steps and devices are needed, and the bending lens 10 is not needed to be detected after being assembled, so that the single bending lens 10 can be rapidly tested. Therefore, the testing steps are effectively simplified, the testing time is saved, and the precision degree and the effect of the test are promoted.
A method of testing a turning lens 10, the method comprising the steps of:
(A) projecting light to the bending lens 10 through a test light source 20;
(B) forming a turning test light ray 200 through the turning lens 10; and
(C) the turning test light 200 is projected from the side of the turning lens 10 to a test recognition system 30,40 for recognizing the test performance of the turning test light 200 transmitted to the turning lens 10 to obtain test information.
Wherein the test method further comprises the step (D): the test light source 20 faces one end of the bending lens 10, and the test identification systems 30 and 40 face the other end of the bending lens 10, so as to adapt the projection direction of the bending test light 200.
Wherein step (A) comprises step (A.1): the test light source 20 projects light to the turning lens 10 through a test reticle 212 for bringing information of the test reticle 212 into the turning test light 200.
Wherein step (C) comprises step (C.1): the bending test light ray 200 is identified by the test identification system 30 through imaging, so as to identify the resolution and the field angle of the bending lens 10.
Wherein step (B) comprises step (B.1): the light enters from the longitudinal direction of the turning lens 10, is turned by a light turning element 12 of the turning lens 10, and exits from the transverse direction of the turning lens 10 to form the turning test light 200.
Wherein said step (C.1) comprises the steps of:
(C.1.1) the turning test light 200 is transversely projected to an image acquisition tool 31 of the test recognition system 30 so as to acquire image information of the test target 212 through the turning lens 10 in a shooting and imaging manner; and
(c.1.2) the image capturing tool 31 transmits the image information of the bending test light 200 to a processor 32 of the test recognition system 30 for processing the captured image information, so as to obtain the test result of the resolution and the field angle of the bending lens 10.
Wherein step (a) comprises step (a.a): the test light source 20 projects light to the turning lens 10 for projecting the laser 221 onto the turning lens 10.
Wherein the step (C) comprises a step (C.a): the turning test light 200 is visually recognized by the test recognition system 40, so that the optical axis of the turning lens 10 can be measured.
Wherein step (A.a) comprises the steps of:
(a.a.1) placing the test light source 20 on a positioning line 434 of a test wall 412 for emitting laser light 221;
(a.a.2) positioning a turning lens barrel 11 at the center of a test chamber 413, aligning the test light source 20, and fitting the center of the light source and the center of the lens to be on the same straight line; and
(a.a.3) the test light source 20 projecting a laser 221 toward the center of a bending lens barrel 11 of the bending lens 10;
wherein between steps (A.a.1) and (A.a.2) further comprising step (A.a.4): correcting the position of the test light source 20, and projecting the test light source 20 from the positioning line 434 to a calibration line 435 to project the laser 221, so that the laser 221 is projected onto a center line 436 of the calibration line 435 for ensuring the projection direction of the test light source 20.
Wherein the step (A.a.2) further comprises the steps of:
(a.a.2.1) mounting a standard prism 121 on the turning cylinder 11; and
(a.a.2.2) placing the turning barrel 11 with the standard prism 121 in a lens holder 441, wherein the lens holder 441 is aligned with a light source holder 442 where the test light source 20 is located.
Wherein step (B) comprises step (B.a): the laser 221 emitted by the test light source 20 enters from the transverse direction of the turning lens barrel 11, is reflected and turned by the standard prism 121 of the turning lens barrel 11, and is emitted from the longitudinal direction of the turning lens barrel 11 to form the turning test light 200.
Wherein the step (C.a) comprises step (C.a.1): the turning test light 200 is projected to a mark portion 431 of the test wall 412 from the side direction of the incident light of the laser 221, so that the corresponding scale of the emergent light of the laser 221 can be visually recognized.
Wherein the test method further comprises the step (E): comparing the design value of the folding lens cone 11 with the measured value of the identification part 431 to obtain the actual optical axis offset of the folding lens cone 11.
The invention provides a manufacturing method of an optical axis measuring device of a bending lens 10, which comprises the following steps:
(h) providing an optical axis test body 41;
(i) providing a measurement structure 43 to the optical axis test body 41 for forming a series of measurement scales uniformly around the optical axis test body 41;
(j) a lens holder 441 is disposed at the center of the optical axis testing body 41 for mounting the bending lens 10; and
(k) a light source holder 442 is provided to a test wall 412 of the optical axis test body 41, aligned with the lens holder 441 for mounting a light source emitter 42 such that the light source center and the lens center are maintained on the same line.
Wherein step (h) comprises step (h.1): the test wall 412 extends upward from a base 411 of the optical axis test body 41 to form a test chamber 413 for mounting the bending lens 10 and projecting light therein.
Wherein the step (i) comprises the steps of:
(i.1) uniformly disposing a mark 431 of the measuring structure 43 on the test wall 412;
(i.2) extending a plurality of protruding elements 432 from said test wall 412 towards said test chamber 413 protruding from the remaining markers 431 on said test wall 412; and
(i.3) a plurality of display elements 433 are provided at intervals on the base 411 corresponding to the respective protruding elements 432 for displaying the measurement scale of the protruding elements 432.
Wherein step (i) further comprises step (i.4); a centerline 436 is provided at the central cross-section of the test wall 412 for identifying the ray casting location.
Wherein step (i.2) comprises the steps of:
(i.2.1) calibrating a pair of symmetrical protruding units 432 on the test wall 412 into a positioning line 434 and a calibration line 435; and
(i.2.2) locating the light source emitter 42 at the locating line 434 for emitting laser light 221, wherein the calibration line 435 is used for correcting the emitting position of the light source emitter 42.
The foregoing is illustrative of specific embodiments of the present invention and reference should be made to the implementation of apparatus and structures not specifically described herein, which is understood to be a general purpose apparatus and method of operation known in the art.
Meanwhile, the above embodiments of the present invention are only used for illustrating the technical solutions of the present invention, and are only examples of the technical solutions of the present invention, and are not used to limit the technical solutions of the present invention and the protection scope thereof. Modifications of the technical solutions disclosed in the claims and the specification by equivalent technical means, equivalent devices and the like should be considered as not exceeding the scope of the claims and the specification of the invention.
Claims (18)
1. A testing apparatus for a turning lens, wherein the turning lens is used for turning projection light entering the turning lens, comprising: the test light source passes through the turning lens to form a turning test light; the test recognition system is used for recognizing a test result of the turning lens, wherein the turning test light is projected to the test recognition system from the side surface of the turning lens, and the test recognition system comprises an optical axis test main body which forms a test cavity for placing the turning lens; and the measuring structure is arranged on the optical axis testing main body and is used for uniformly forming a series of measuring scales around the optical axis testing main body, so that the optical axis of the turning lens is measured in a visual reading mode.
2. A testing apparatus for a bending lens according to claim 1, further comprising a holding means comprising a lens holder for mounting the bending lens and a light source holder aligned with the lens holder, the light source holder for mounting the light source emitter adapted to keep the lens center and the light source center on the same line.
3. The apparatus for testing a bending lens according to claim 2, further comprising a standard prism installed in a bending lens barrel of the bending lens to be tested, so as to turn the light in the bending lens barrel to form the bending test light.
4. A testing apparatus of a bending lens according to claim 3, wherein the testing light source is a laser emitter for emitting laser light.
5. The apparatus for testing a bending lens according to claim 4, wherein the optical axis testing body has a base and a testing wall extending upward from the base, wherein the lens holder is centrally disposed on the base, and the light source holder extends from the testing wall toward the lens holder to be aligned with the lens holder.
6. A test apparatus for a bending lens according to claim 5, wherein the measuring wall comprises a mark part uniformly formed on the measuring wall for forming a series of measuring scales on the measuring wall.
7. The testing device of a turning lens according to claim 6, wherein the turning test light is projected to the marking portion of the test wall from the side direction of the laser incident light, so that the corresponding scale of the laser emergent light can be visually recognized.
8. The test device of claim 7, the measurement structure further comprising a plurality of protruding elements extending from the test wall toward the test chamber and protruding from other markers on the test wall, and a plurality of display elements corresponding to the protruding elements, wherein the display elements are spaced apart from the base adjacent to each of the protruding elements for displaying a measurement scale of the protruding elements.
9. The test apparatus as claimed in claim 8, wherein the measurement structure has a positioning line and a standard line, the positioning line is symmetrically disposed on the protruding unit of the test wall, and the test light source is disposed on the positioning line, and the standard line is aligned with the standard line to correct the emission position of the test light source.
10. The test apparatus as claimed in claim 9, wherein the measuring structure further has a center line, the center line being disposed at a central cross section of the test wall for confirming a light projection position.
11. The test device of claim 10, wherein the display unit sequentially displays the highlighting element scales as 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 with the location line as an origin.
12. A method of testing a turning lens for turning projection light entering the turning lens, the method comprising:
(A) projecting light to the turning lens through a test light source;
(B) forming a turning test light ray through the turning lens; and
(C) the turning test light is projected to a test identification system from the side surface of the turning lens so as to be used for identifying the test performance of the turning test light on the turning lens and acquiring test information, wherein the step (A) comprises the following steps: projecting light rays through the test light source toward the turning lens for projecting laser light onto the turning lens, wherein the step (C) comprises the step (C.a): the optical axis of the turning lens is measured by visually recognizing the turning test light through the test recognition system, wherein the test recognition system comprises an optical axis test main body which forms a test cavity for placing the turning lens; and the measuring structure is arranged on the optical axis testing main body and is used for uniformly forming a series of measuring scales around the optical axis testing main body, so that the optical axis of the turning lens is measured in a visual reading mode.
13. The test method of claim 12, said step (a.a) comprising the steps of:
(a.a.1) placing the test light source on a positioning line of a test wall for emitting laser light;
(A.a.2) arranging a turning lens barrel of the turning lens at the center of a test cavity, aligning the test light source and enabling the center of the test light source and the center of the turning lens to be on the same straight line; and
(A.a.3) the test light source projects laser to the center of the turning lens barrel which the turning lens is provided with.
14. The test method of claim 13, further comprising, between the steps (a.a.1) and (a.a.2), a step (a.a.4): and correcting the position of the test light source, and projecting the test light source from the positioning line to a calibration line so that the laser is projected to a central line of the calibration line to ensure the projection direction of the test light source.
15. The test method of claim 14, said step (a.a.2) further comprising the steps of:
(A.a.2.1) mounting a standard prism on the turning lens cone; and
(A.a.2.2) placing the turning lens barrel with the standard prism on a lens holder, wherein the lens holder is aligned with a light source holder where the test light source is located.
16. A test method according to any one of claims 12 to 15, the step (B) comprising the step (b.a): the laser emitted by the test light source enters from the transverse direction of a turning lens cone arranged on the turning lens, is reflected and turned by a standard prism of the turning lens cone and is emitted from the longitudinal direction of the turning lens cone to form the turning test light.
17. The test method of claim 16, said step (C.a) comprising the step (c.a.1): the turning test light is projected to an identification part of the test wall from the side direction of the laser incident light, so that the corresponding scale of the laser emergent light can be visually identified.
18. The test method of claim 17, further comprising step (E): and comparing the design value of the turning lens cone with the measured value of the identification part to obtain the actual optical axis offset of the turning lens cone.
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| CN106841203B (en) * | 2017-03-26 | 2023-08-11 | 中国海洋大学 | Submarine orthogonal observation equipment |
| CN107543040B (en) * | 2017-07-25 | 2019-07-02 | 歌尔股份有限公司 | Testing light source and test device for wide-angle lens |
| CN108093247B (en) * | 2017-12-15 | 2020-11-27 | 信利光电股份有限公司 | Method and system for testing field angle of lens |
| CN108827599A (en) * | 2018-05-21 | 2018-11-16 | 余姚舜宇智能光学技术有限公司 | A kind of wide-angle mould group full filed resolving power test equipment and method |
| CN116256155A (en) * | 2023-05-10 | 2023-06-13 | 常州铭赛机器人科技股份有限公司 | Testing device of optical lens and using method thereof |
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