CN204255311U - A kind of offset measurement mechanism of optical element - Google Patents
A kind of offset measurement mechanism of optical element Download PDFInfo
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- CN204255311U CN204255311U CN201420768335.3U CN201420768335U CN204255311U CN 204255311 U CN204255311 U CN 204255311U CN 201420768335 U CN201420768335 U CN 201420768335U CN 204255311 U CN204255311 U CN 204255311U
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- imageing sensor
- optical element
- parallel light
- guide rail
- offset measurement
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Abstract
The utility model discloses a kind of offset measurement mechanism of optical element, comprise: carrying out offset measurement for treating photometry element, comprising: base; Column guide rail, its bottom surface is fixed on described base; Objective table, be disposed side by side on described base with described column guide rail, described objective table all around can slide along base; Parallel light tube, is slidably arranged on column guide rail; Optical element to be measured, is arranged on objective table, the directional light that reflected parallel light pipe sends; Imageing sensor, receives optical element reflected parallel light to be measured; Imageing sensor is connected with column guide rail by a connecting elements, and parallel light tube and imageing sensor are a default angle; Data processing unit, is connected with imageing sensor.The utility model can facilitate the offset detecting Cassegrain system aspheric surface optical accessory intuitively, and apparatus structure is simple, and light path easily adjusts, and reliability is high, error is little.
Description
Technical field
The utility model relates to middle porose cassegrain optics and detects offset technical field, is specifically related to the optical element offset measurement mechanism having aperture in the middle of a kind of aspheric surface.
Background technology
Middle porose aspheric surface optical accessory, is widely used in the numerous areas such as space flight, military affairs, industry, medical treatment.Due in various optical system, the coaxiality of optical axis is the basic demand ensureing optical system imaging quality, and in the process of non-spherical lens, due to the impact of the factor such as artificial, technique, machine, errors of centration can be produced, thus destroy the coaxiality of optical system, therefore non-spherical lens errors of centration is also the problem that the optical axis evaluating aspheric optical system does not overlap, also destroy the coaxiality of optical system, the measuring system therefore studying and design non-spherical lens offset is main task.
In prior art, when part non-spherical lens manufacturer carries out the measurement of non-spherical lens offset for the non-spherical lens produced in batches, the measurement that Application comparison is traditional, the measuring method of similar spherical mirror, the measuring error of this measuring method is large, cannot show numerical value intuitively.
Utility model content
The purpose of this utility model is the offset measurement mechanism providing a kind of optical element, can facilitate the offset detecting Cassegrain system aspheric surface optical accessory intuitively, and apparatus structure is simple, and light path easily adjusts, and reliability is high, error is little.
In order to achieve the above object, the utility model is achieved through the following technical solutions: carrying out offset measurement for treating photometry element, being characterized in, comprising:
Base;
Column guide rail, its bottom surface is fixed on described base;
Objective table, be disposed side by side on described base with described column guide rail, described objective table all around can slide along base;
Parallel light tube, is slidably arranged on column guide rail, and is positioned at above objective table, the height adjustable between parallel light tube and objective table;
Optical element to be measured, is arranged on objective table, the directional light that reflected parallel light pipe sends;
Imageing sensor, receives the directional light of optical element to be measured reflection;
Described imageing sensor is connected with described column guide rail by a connecting elements, and described parallel light tube and imageing sensor are a default angle;
Data processing unit, is connected with described imageing sensor.
The default angle of described parallel light tube and imageing sensor is 30 degree.
Diesis wire division plate is provided with in described parallel light tube.
Described optical element to be measured is the optical element having aperture in the middle of aspheric surface.
Described imageing sensor is CCD industrial camera.
Described connecting elements comprises card extender and translation stage;
Described card extender is connected with described column slide;
Described translation stage is slidably arranged on card extender;
Described imageing sensor is arranged on translation stage.
Described data processing unit is computing machine.
The offset measurement mechanism of a kind of optical element of the utility model compared with prior art has the following advantages: owing to being provided with objective table and translation stage, light path easily adjusts, and apparatus structure is simple, and error is little, and reliability is high, and measuring accuracy can reach 10 "; Adopt not collinear three points can determine the principle of a circle, by the matching of computing machine to three measurement data, determine offset, there is comparatively wide use value, can be applicable to the measurement of optical element offset in Cassegrain.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the offset measurement mechanism of a kind of optical element of the utility model;
Fig. 2 is the optical system schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the utility model is further elaborated.
As shown in Figure 1, a kind of offset measurement mechanism of optical element, offset measurement is carried out for treating photometry element 5, optical element 5 to be measured is the optical element having aperture in the middle of aspheric surface, the non-coaxial measurement of offset measurement and optics principal reflection mirror parabola optical axis and magnet steel geometric center, measurement mechanism comprises: base 1, plays a supportive role, column guide rail 2, its bottom surface is fixed on described base 1, objective table 3, be disposed side by side on described base 1 with described column guide rail 2, described objective table 3 all around can slide along base 1, namely in fact objective table 3 be one can the platform of two-dimension translational, fine-tuning distance all around, parallel light tube 4, the light for being sent by light source is directional light injection, is slidably arranged on column guide rail 2, is convenient to the height adjustable between parallel light tube 4 and objective table 3, and be positioned at above objective table 3, optical element 5 to be measured, is arranged on objective table 3, the directional light that reflected parallel light pipe 4 sends, imageing sensor 6, receives the directional light of optical element 5 to be measured reflection, carries out opto-electronic conversion, image on CCD minute surface, described imageing sensor 6 is connected with described column guide rail 2 by a connecting elements 7, and connecting elements 7 comprises card extender 71 and translation stage 72, described card extender 71 is slidably connected with described column guide rail 2, described translation stage 72 is slidably arranged on card extender 71, and translation stage 72 can only move in the horizontal direction, described imageing sensor 6 is arranged on translation stage 72, therefore, when needing the position changing imageing sensor 6, need to operate card extender 71 and translation stage 72 simultaneously, parallel light tube 4 is preset angle with imageing sensor 6 in one and is arranged, arranging angle is the reflected light facilitating imageing sensor 6 to receive optical element to be measured, data processing unit, be connected with described imageing sensor 6, the picture point signal that imageing sensor 6 receives is simulating signal, A/D conversion is carried out through image plate, simulating signal is converted to digital signal, be input to data processing unit, data processing unit is a computing machine, in computing machine, data processing software is housed, for comparing picture point, judge, analyze, can accurately show picture point size, gather the important performance indexes such as image patch distance center misalignment of axe angle quantitatively to determine picture element quality, final utilization printer printout test result.
In preferred embodiment of the present utility model, column guide rail 2 adopts the structure of gear stick, and parallel light tube 4 and card extender 71 are equipped with gear clamper, is convenient to the position changing parallel light tube 4 and card extender 71.In one alternate embodiment, column guide rail 2 adopts stretching structure, by the position of flexible change parallel light tube 4 and card extender 71.
In preferred embodiment of the present utility model, conveniently image display and data acquisition, be provided with diesis wire division plate, provide measurement effect directly perceived in parallel light tube 4.High section parallel light tube series of products selected by parallel light tube 4, and diameter is greater than Φ 20, the depth of parallelism 10 ", built-in pair of vertical line " crosshair ", energy of light source is adjustable.
In preferred embodiment of the present utility model, CCD industrial camera selected by imageing sensor 6.Select the industrial camera of German company, resolution is 1360 × 1024 picture numbers.
In preferred embodiment of the present utility model, data processing unit adopts the IPC series type high-performance industrial computer of Yan Hua company.
The principle that the utility model adopts is that light enters CCD after the reflection of principal reflection mirror (optical element 5 to be measured), the crosshair in parallel light tube is shown clearly after CCD amplifies, optical schematic diagram as described in Figure 2, when rotating principal reflection mirror, crosshair is around a closed circular motion, data processing unit calculates diameter of a circle automatically, namely completes the measurement of principal reflection mirror malalignment.
Optical element 5 to be measured adopts endoporus two-point locating, and parallel light tube 4 sends a branch of directional light to optical element 5 to be measured, and through parabolic reflector, reflection picture point can not return by original optical path, slants out, received by imageing sensor 6 with vertical light is angled.
Shown in composition graphs 2, measurement mechanism for convenience of description, discloses a kind of offset measuring method of optical element, comprises following steps:
S1, by the optical mirror plane of optical element 5 to be measured upward, adopts endoporus two-point locating mode to be placed on objective table 3;
S2, fine tuning objective table 3 and translation stage 72, make the hot spot crosshair picture point that imageing sensor 6 and optical element 5 to be measured reflect defocused reception optical element 5 to be measured;
Hot spot crosshair picture point is sent to data processing unit by S3, imageing sensor 6;
S4, rotate optical element 5 to be measured, repeat step S1-S2-S3;
S5, again rotate optical element 5 to be measured, repeat step S1-S2-S3;
S6, data processing unit are with the cross centre line matching circle of the hot spot crosshair picture point to receive for three times, and adopt three of not conllinear principles can determining a circle, diameter of a circle is offset.
The angle of described rotation optical element 5 to be measured is greater than 60 degree.
Although content of the present utility model has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (7)
1. an offset measurement mechanism for optical element, carrying out offset measurement for treating photometry element (5), it is characterized in that, comprise:
Base (1);
Column guide rail (2), its bottom surface is fixed on described base (1);
Objective table (3), is disposed side by side on described base (1) with described column guide rail (2), and described objective table (3) all around can slide along base (1);
Parallel light tube (4), is slidably arranged on column guide rail (2), and is positioned at objective table (3) top, the height adjustable between parallel light tube (4) and objective table (3);
Optical element to be measured (5), is arranged on objective table (3), the directional light that reflected parallel light pipe (4) sends;
Imageing sensor (6), receives the directional light that optical element to be measured (5) reflects;
Described imageing sensor (6) is connected with described column guide rail (2) by a connecting elements (7), and described parallel light tube (4) presets angle with imageing sensor (6) in one;
Data processing unit, is connected with described imageing sensor (6).
2. offset measurement mechanism as claimed in claim 1, is characterized in that, described parallel light tube (4) is 30 degree with the default angle of imageing sensor (6).
3. offset measurement mechanism as claimed in claim 1, is characterized in that, be provided with diesis wire division plate in described parallel light tube (4).
4. the offset measurement mechanism as described in claim 1, is characterized in that, described optical element to be measured (5) is for there being the optical element in aperture in the middle of aspheric surface.
5. offset measurement mechanism as claimed in claim 1, it is characterized in that, described imageing sensor (6) is CCD industrial camera.
6. offset measurement mechanism as claimed in claim 1, it is characterized in that, described connecting elements (7) comprises card extender (71) and translation stage (72);
Described card extender (71) and described column guide rail (2) are slidably connected;
Described translation stage (72) is slidably arranged on card extender (71);
Described imageing sensor (6) is arranged on translation stage (72).
7. offset measurement mechanism as claimed in claim 1, it is characterized in that, described data processing unit is computing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420768335.3U CN204255311U (en) | 2014-12-09 | 2014-12-09 | A kind of offset measurement mechanism of optical element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420768335.3U CN204255311U (en) | 2014-12-09 | 2014-12-09 | A kind of offset measurement mechanism of optical element |
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| Publication Number | Publication Date |
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| CN204255311U true CN204255311U (en) | 2015-04-08 |
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| CN201420768335.3U Active CN204255311U (en) | 2014-12-09 | 2014-12-09 | A kind of offset measurement mechanism of optical element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406547A (en) * | 2014-12-09 | 2015-03-11 | 上海新跃仪表厂 | Measuring device and measuring method for eccentricity of optical part |
-
2014
- 2014-12-09 CN CN201420768335.3U patent/CN204255311U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406547A (en) * | 2014-12-09 | 2015-03-11 | 上海新跃仪表厂 | Measuring device and measuring method for eccentricity of optical part |
| CN104406547B (en) * | 2014-12-09 | 2017-11-07 | 上海新跃仪表厂 | The eccentric measuring device and its measuring method of a kind of optical element |
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