CN205067059U - Optical bench of focus is surveyed to magnifying power method - Google Patents
Optical bench of focus is surveyed to magnifying power method Download PDFInfo
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- CN205067059U CN205067059U CN201520779366.3U CN201520779366U CN205067059U CN 205067059 U CN205067059 U CN 205067059U CN 201520779366 U CN201520779366 U CN 201520779366U CN 205067059 U CN205067059 U CN 205067059U
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- axis
- guide rail
- optical bench
- focal length
- measuring
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses an optical bench of focus is surveyed to magnifying power method, including setting up the epaxial collimator subassembly of key light, lens holder, measuring microscope in proper order to and the Y axle one -dimensional guide rail parallel with the primary optic axis, still include the CCD receiver, and with primary optic axis vertically X axle one -dimensional guide rail, be equipped with the lead screw of slider, control slide removal and the grating chi of measurement slider displacement on the X axle one -dimensional guide rail, measuring microscope fixed mounting is on the slider, the grating chi is connected with grating chi digital display table, and the CCD receiver is connected with the image display ware. The utility model discloses a measure the optical bench of focus to traditional magnifying power and transform, increase X axle high accuracy linear guide, utilize the double image eyepiece to aim at, reduce focus measuring error to have improved measuring range and measuring speed simultaneously to 0.1% -0.5% by 0.5% -1%.
Description
Technical field
The utility model belongs to optical instrument field of measuring technique, is specifically related to the measurement mechanism that a kind of magnification method surveys focal length.
Background technology
The characteristic parameter of optical system is as the foundation of Optical Instrument Designing, and this characterisitic parameter mainly determines the scope of application of optical system.Focal length is the important characteristic of optical system, as long as know the position of focal length and focus, just can determine completely the object on any position through the position of this optical system imaging, size, just to fall and the full detail such as actual situation.So prepare the focal length measuring optical system, be not only examination product, examine it whether to reach the means of designing requirement, and be find or find out from design, be worked into the important method of existing problem in the whole process of assembling.
Magnification method focal length measurement is focal-length measurement method the most frequently used aborning at present, because the equipment required for it is simple, measurement operation is more convenient, and measuring accuracy is higher.But also there are some drawbacks in the method.Such as, systematic error compares and is difficult to correct, and needs the object lens rule of thumb needing to match, and require to meet to some high-acruracy surveys, survey measurements is inconvenient, and artificial parallax error is larger.
Utility model content
Goal of the invention: the purpose of this utility model is by transforming the optical bench of traditional magnification focal length measurement, to improve measuring accuracy, measurement range and measuring speed.
Technical scheme: for achieving the above object, the technical solution adopted in the utility model is:
A kind of magnification method surveys the optical bench of focal length, comprise and the parallel light tube assembly on primary optical axis is being set successively, lens clamp, measuring microscope, and the Y-axis one dimension guide rail parallel with primary optical axis, also comprise CCD receiver, and the X-axis one dimension guide rail vertical with primary optical axis, X-axis one dimension guide rail is provided with slide block, controls the grating scale of the leading screw of slide block movement and measurement slide block displacement, and described measuring microscope is fixedly mounted on described slide block; Described grating scale is electrically connected with grating scale digital display meter, and described CCD receiver is electrically connected with image display.
Described parallel light tube assembly comprises light source, graticule, parallel light tube and object lens, and described graticule is positioned at the focal plane of object lens.
As preferably, be provided with cross-graduation plate in described measuring microscope, the image that described CCD receiver receives comprises the picture of the graticule in parallel light tube assembly and the picture of microscope inner cross division line.
As preferably, described graticule is provided with the parallel lines at least one pair of vertical direction, and the length of outermost a pair line is the longest.
Further, this optical bench also comprises motor and image recognition control module, and described leading screw is connected with motor-driven, and described motor is connected with image recognition control module, receives the rotation control signal that image recognition control module exports.
Further, Y-axis is provided with below described measuring microscope and Z axis finely tunes two-dimentional guide rail.
Principle of work: the formula of magnification method focal length measurement is f=f0(y '/y), wherein f0 is the focal length of parallel light tube object lens, y be positioned at parallel light tube focal plane of lens graticule on the spacing distance of a pair groove, y ' is that this is to the spacing distance of groove through measured lens imaging.When measuring, f0 and y is in advance by the exact value that the precision measurements such as calibration Indexing table, image measurer obtain, and measures the spacing distance that key point is a pair groove obtaining graticule imaging.In the utility model, graticule is imaged on unlimited distance through parallel light tube object lens, measured lens again above lens clamp, the focal plane of lens to be imaged on CCD receiver by measuring microscope and to be shown by image display, we drive measuring microscope and CCD receiver to move by the slide block on mobile high precision X-axis one dimension guide rail, and adopt precision grating scale to accurately measure displacement, based on the comparison of image, the spacing distance of a pair groove imaging on graticule can be measured accurately.We just can calculate the focal distance f of measured lens accurately by above-mentioned formula like this.
Beneficial effect: compared with prior art, the utility model tool has the following advantages: 1, legacy equipment is because need by microscope visual, be subject to the restriction of microscopic fields of view, so need the focal length different according to measured piece to select the object lens of different multiplying, the any range that the utility model coordinates high precision grating scale to can be implemented in X-axis guide track by CCD receiver moves, object lens can use arbitrarily in theory, and object lens choosing dress is simple.2, the utility model optical bench measuring speed is fast, and adopt double image eyepiece to improve line precision, eliminate visual error, precision is high, and reading is fast.Focometry error is reduced to 0.1%-0.5% by 0.5%-1%, and improves measurement range and measuring speed simultaneously.3, replace traditional very small amount cassette reading by the high-precision flat moving stage that X-axis one dimension guide rail, high precision grating scale etc. form, improve measuring accuracy, and configure the micromatic setting of Y-axis and Z axis, debug more convenient.4, automatically identified and motor-driven by combining image, the automatic reading of image-forming range can be realized, measuring accuracy and speed can be improved further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the schematic diagram that in the utility model embodiment, CCD receiver receives image.
In figure, 1: parallel light tube assembly, 2: lens clamp, 3: measuring microscope, 4:CCD receivers, 5:Y axle one dimension guide rail, 6:X axle one dimension guide rail, 7: grating scale, 8: slide block, 9: grating scale digital display meter, 10: image display.
Embodiment
Below in conjunction with specific embodiment, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, disclosed in the utility model embodiment, a kind of magnification method surveys the optical bench of focal length, comprise and the parallel light tube assembly 1 on primary optical axis is being set successively, lens clamp 2, measuring microscope 3, CCD receiver 4, the Y-axis one dimension guide rail 5 parallel with primary optical axis, and the X-axis one dimension guide rail 6 vertical with primary optical axis, X-axis one dimension guide rail 6 is provided with slide block 8, leading screw (not shown) and high precision grating scale 7, leading screw controls slide block 8 and slides on X-axis one dimension guide rail 6, measuring microscope 3 is fixedly mounted on slide block 8, CCD receiver 4 is arranged on measuring microscope 3 eyepiece end, gather image in microscope 3 eyepiece, by adjusting screw, measuring microscope 3 and CCD receiver 4 can be driven in X-axis to-and-fro movement.Slide block 8 side againsts the read head of grating scale 7, the light belt of grating scale 7 is attached to the impact faces of X-axis one dimension guide rail 6, grating scale 7 is connected with grating scale digital display meter 9, the displacement of microscope 3 on slide block 8 is directly read by grating scale digital display meter 9, CCD receiver 4 is connected with image display 10, shows image by image display 10.Except arranging X-axis High Precision One Dimensional guide rail below measuring microscope 3, the below of microscope 3 is also provided with Y-axis and Z axis finely tunes two-dimentional guide rail, to facilitate convenience and the accuracy of debugging.
Parallel light tube assembly 1 comprises light source, graticule, parallel light tube and object lens, graticule is positioned at the focal plane of object lens, graticule is through parallel light tube object lens, measured lens, CCD receiver 4 is imaged on by measuring microscope 3, also cross division line is provided with in measuring microscope 3, be imaged on CCD receiver 4 together, and shown by image display 10, as shown in Figure 2, wherein black line four pairs of division lines are the imaging of light source graticule below in parallel light tube assembly 1, and light color (being the light tones such as green in practical application) cross curve is the graticule imaging in microscope 3.In preceding formula, y ' is for graticule is through the spacing distance of measured lens imaging, may be selected to be the distance of the longest outermost a pair line (A, B) in four pairs of lines herein.In measuring process, the position of measuring microscope 3 is adjusted by observing cross picture and the situation that overlaps of line A and line B, when cross curve moves on line B from line A, or move on line A from line B, the displacement of microscope 3 is the spacing distance of line A and line B, this distance is read by high precision (1um) grating scale 7, and is shown by grating scale digital display meter 9.The last focal distance f calculating measured lens according to formula accurately.
The mobile of measuring microscope 3 controls, and can be undertaken line by eye-observation image, manual adjusting screw realizes.Also can be controlled by image recognition control module and motor, the image that this image recognition control module receives based on CCD receiver, identifies, show that microscope 3 is the need of information that is mobile and moving direction, export corresponding signal to motor, automatically control microscope 3 and move.Such as in image display system, dispose image automatic identification program, cross inconocenter point, cross curve and line A intersection point, cross curve and line B intersection point is extracted by software, by judging the position relationship of 3, draw the moving direction of microscope 3, and according to real-time reception to image judge whether to overlap, send and continue mobile or stop the signal of movement.Be connected with motor by leading screw, motor is connected with image display 10, receives it and rotates control signal, automatically control screw turns, realizes the automatic mobile of measuring microscope 3 and controls, to improve measuring accuracy and speed further.
Claims (6)
1. the optical bench of a magnification method survey focal length, comprise and the parallel light tube assembly (1) on primary optical axis is being set successively, lens clamp (2), measuring microscope (3), and the Y-axis one dimension guide rail (5) parallel with primary optical axis, it is characterized in that, also comprise CCD receiver (4), and the X-axis one dimension guide rail (6) vertical with primary optical axis, X-axis one dimension guide rail (6) is provided with slide block (8), control the leading screw of slide block (8) movement and measure the grating scale (7) of slide block (8) displacement, described measuring microscope (3) is fixedly mounted on described slide block (8), described grating scale (7) is connected with grating scale digital display meter (9), and described CCD receiver (4) is connected with image display (10).
2. magnification method according to claim 1 surveys the optical bench of focal length, and it is characterized in that, described parallel light tube assembly (1) comprises light source, graticule, parallel light tube and object lens, and described graticule is positioned at the focal plane of object lens.
3. magnification method according to claim 2 surveys the optical bench of focal length, it is characterized in that, described measuring microscope is provided with cross-graduation plate in (3), and the image that described CCD receiver (4) receives comprises the picture of the graticule in parallel light tube assembly and the picture of microscope inner cross division line.
4. magnification method according to claim 2 surveys the optical bench of focal length, and it is characterized in that, described graticule is provided with the parallel lines at least one pair of vertical direction, and the length of outermost a pair line is the longest.
5. magnification method according to claim 1 surveys the optical bench of focal length, it is characterized in that, also comprise motor and image recognition control module, described leading screw is connected with motor-driven, described motor is connected with image recognition control module, receives the rotation control signal that image recognition control module exports.
6. magnification method according to claim 1 surveys the optical bench of focal length, it is characterized in that, described measuring microscope (3) below is provided with Y-axis and Z axis finely tunes two-dimentional guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520779366.3U CN205067059U (en) | 2015-10-09 | 2015-10-09 | Optical bench of focus is surveyed to magnifying power method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520779366.3U CN205067059U (en) | 2015-10-09 | 2015-10-09 | Optical bench of focus is surveyed to magnifying power method |
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| CN205067059U true CN205067059U (en) | 2016-03-02 |
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| CN201520779366.3U Expired - Fee Related CN205067059U (en) | 2015-10-09 | 2015-10-09 | Optical bench of focus is surveyed to magnifying power method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203304A (en) * | 2015-10-09 | 2015-12-30 | 茂莱（南京）仪器有限公司 | Optical bench for measuring focus length through magnification method |
| CN107015525A (en) * | 2017-03-16 | 2017-08-04 | 南通大学 | A kind of micro-displacement control platform and application method observed suitable for micro-fluidic chip |
| CN107144526A (en) * | 2017-03-16 | 2017-09-08 | 南通大学 | A kind of micro-displacement control device observed suitable for micro-fluidic chip and application method |
| CN107741636A (en) * | 2017-11-07 | 2018-02-27 | 苏州西默医疗科技有限公司 | A kind of visual school positive system for becoming inclination angle binocular lens tube and its bearing calibration |
| CN114518216A (en) * | 2021-12-31 | 2022-05-20 | 河南中光学集团有限公司 | Eye point distance measuring device for checking optical sight product |
-
2015
- 2015-10-09 CN CN201520779366.3U patent/CN205067059U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203304A (en) * | 2015-10-09 | 2015-12-30 | 茂莱（南京）仪器有限公司 | Optical bench for measuring focus length through magnification method |
| CN107015525A (en) * | 2017-03-16 | 2017-08-04 | 南通大学 | A kind of micro-displacement control platform and application method observed suitable for micro-fluidic chip |
| CN107144526A (en) * | 2017-03-16 | 2017-09-08 | 南通大学 | A kind of micro-displacement control device observed suitable for micro-fluidic chip and application method |
| CN107741636A (en) * | 2017-11-07 | 2018-02-27 | 苏州西默医疗科技有限公司 | A kind of visual school positive system for becoming inclination angle binocular lens tube and its bearing calibration |
| CN114518216A (en) * | 2021-12-31 | 2022-05-20 | 河南中光学集团有限公司 | Eye point distance measuring device for checking optical sight product |
| CN114518216B (en) * | 2021-12-31 | 2023-09-29 | 河南中光学集团有限公司 | Eye point distance measuring device for detecting optometrized aiming product |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20191009 |
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| CF01 | Termination of patent right due to non-payment of annual fee |