CN103033946A - Assembly and adjustment method of double-view-field axial zoom optical system - Google Patents
Assembly and adjustment method of double-view-field axial zoom optical system Download PDFInfo
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- CN103033946A CN103033946A CN2012105584429A CN201210558442A CN103033946A CN 103033946 A CN103033946 A CN 103033946A CN 2012105584429 A CN2012105584429 A CN 2012105584429A CN 201210558442 A CN201210558442 A CN 201210558442A CN 103033946 A CN103033946 A CN 103033946A
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Abstract
The invention relates to an assembly and adjustment method of a double-view-field axial zoom optical system. The method includes firstly measuring defocusing amount between a big view field and a small view field and focal length of each filed view of the measured double-view-field axial zoom optical system; confirming an optical path of the optical system and selecting a proper zoom lens group according to specific optical parameters of the optical system; by means of the defocusing amount of the big view field and the small view field and the focal length of the small view field ( or the focal length of the big view field), optimizing ideal focal length and multiplying power of the big view field and the small view field and distance (best adjustment distance and direction of a limit mechanism) that a zoom lens needs to move forwards and backwards relative to a defocus view field in the ideal big view field (or the ideal small view field); and instructing assembly debugging according to calculation results and achieving optimized results. According to the assembly and adjustment method, operation is simple and convenient, axial assembly and adjustment for the double-view-field axial zoom optical system can be carried out, and the precision is high.
Description
Technical field
The invention belongs to the ray machine integration techno logy, in particular the Method of Adjustment of the axial variable-power optical system of a kind of double-view field.
Background technology
The most of optical system that adopts axial zoom, double-view field of tv product, and along with the increase of unit beforehand research model, similar structures can get more and more.And at present for the axial variable-power optical system of double-view field, the adjustment method of usefulness is usually: repeat to guarantee parfocalization (two visual fields are simultaneously clear), measure respectively the focal length of double-view field, until satisfy its focal length tolerance under the condition of double-view field parfocalization again.This have following obvious deficiency based on the adjustment method of approaching one by one with micro-judgment: 1. need experienced debugging person; 2. repeatedly repeat debugging, efficient is low; 3. approach one by one debugging, process can not be optimized and quantize, and process is uncontrollable.
Summary of the invention
The objective of the invention is to propose the Method of Adjustment of the axial variable-power optical system of a kind of double-view field, to solve the deficiency of existing Method of Adjustment.
The present invention solves the problems of the technologies described above the Method of Adjustment that has proposed the axial variable-power optical system of a kind of double-view field, and the concrete steps of this Method of Adjustment are as follows:
1). measure defocusing amount and two visual field focal lengths separately between two visual fields of size of the axial variable-power optical system of double-view field to be debug;
2). according to the concrete optical parametric of this optical system, determine the light path of this optical system and select suitable zoom mirror group;
3). the distance that the relative out of focus of zoom mirror visual field need to move forward and backward when utilizing the desirable focal length of large small field of view defocusing amount and small field of view focal length or the large large small field of view of visual field focal length optimization, multiplying power and desirable large visual field or small field of view;
4). parfocalization position of focal plane and large small field of view focal length according to the best adjustable range of the position-limit mechanism that calculates and direction, expection, instruct assembling and setting, and reach the result of optimization.
The measuring process of the defocusing amount of described step 1) is as follows:
Tested optical system is put on the fixed support, and adjusting pole makes the optical axis of system under test (SUT) roughly overlap with the optical axis of parallel light tube, and the X of adjusting measuring apparatus, Y-axis find a view field image surface position of tested optical system, and grating digital readout is shown the numerical value zero clearing;
Tested optical system is rotated to the another one visual field, and X-axis, the Y-axis of regulating the defocusing amount measuring instrument make it move forward and backward along optical axis direction, until find the image planes position of visual field, read the value on the grating digital readout, are the defocusing amount of these two visual fields.
The measuring process of described step 1) mid-focal length is as follows:
A) double-view field zoom telescopic system that will be to be debug is put on the support of defocusing amount measuring instrument, and adjusting pole makes the optical axis of system under test (SUT) roughly overlap with the optical axis of parallel light tube;
B) observe at the focal plane of measured lens with the defocusing amount measuring instrument, measure glass sieve plate and reach the standard grade to the spacing y ' of picture;
C) according to the line on the image planes spacing y ' and glass sieve plate are reached the standard grade to the relation between the spacing y,
Namely
Calculate the focal length of measured lens, the y ' that the defocusing amount measuring instrument is measured is actually through the defocusing amount measuring instrument and amplifies the numerical value of β after doubly, and the actual computation formula should be:
Described step 2) optical parametric that relates in comprises optical spherical surface radius, thickness, refractive index and clear aperature.
The invention has the beneficial effects as follows: the present invention is by utilizing defocusing amount and two the visual field focal lengths separately between defocusing amount measuring instrument measurement visual field, then utilize the parameters of this defocusing amount, focal length and optical system, the parfocalization position of focal plane of the best adjustable range of optimization position-limit mechanism and direction, expection and large small field of view focal length, instruct assembling and setting, and reach the result of optimization.The present invention is easy and simple to handle, can axially debug the axial variable-power optical system of double-view field, and precision is high.
Description of drawings
Fig. 1 is the structural drawing of employed defocusing amount measuring instrument among the present invention;
Fig. 2-a is the light path synoptic diagram of the long burnt position of double-view field zoom telescopic system in the embodiment of the invention;
Fig. 2-b is the light path synoptic diagram of the short burnt position of double-view field zoom telescopic system in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.
Take the double-view field zoom telescopic system shown in Fig. 2-a and Fig. 2-b as example, the axial variable-power optical system Method of Adjustment of double-view field of the present invention is described, this double-view field zoom telescopic system by objective lens H1, zoom mirror group H2, and rear group of H3 form, the position of objective lens H1 and rear group of H3 immobilizes, its spacing d1+d2=160mm. moves the movement of zoom mirror group H2, form corresponding large small field of view, corresponding large and small visual field zoom mirror is respectively in d1=119.6mm and d1=150.5mm position when establishing thick dress.The zoom lens barrel moves to two extreme positions and will be located by two position-limit mechanisms, because optics and mechanical component are in processing with debug and have error in the process, so the position of two position-limit mechanisms must be adjustable.In debuging process, guarantee first the double-view field parfocalization, and then measure respectively the focal length of double-view field, overproof if there is focal length, then finely tune in opposite directions or oppositely position-limit mechanism to change d1, the process of specifically debuging of this optical system is as follows:
1. measure defocusing amount and two visual field focal lengths separately between two visual fields of the axial variable-power optical system size of double-view field to be debug.
The measuring process of defocusing amount is as follows:
1) double-view field zoom telescopic system that will be to be debug is put on the support of defocusing amount measuring instrument, adjusting pole makes the optical axis of system under test (SUT) roughly overlap with the optical axis of parallel light tube, the X of adjusting measuring apparatus, Y-axis find a view field image surface position of tested optical system, the burnt position of length shown in Fig. 2-a, d1=150mm, grating digital readout is shown the numerical value zero clearing, and employed defocusing amount measuring instrument comprises X-direction transfer table 1, Y-direction transfer table 2, object lens 3, eyepiece 4 and CCD5 as shown in Figure 1;
2) tested optical system is rotated to the another one visual field, the burnt position of the weak point shown in Fig. 2-b, d
1=120, X-axis, the Y-axis of regulating the defocusing amount measuring instrument make it move forward and backward along optical axis direction, until find the image planes position of visual field, read the value on the grating digital readout, and this numerical value is the defocusing amount of these two visual fields.
The measuring process of focal length
A) double-view field zoom telescopic system that will be to be debug is put on the support of defocusing amount measuring instrument, and adjusting pole makes the optical axis of system under test (SUT) roughly overlap with the optical axis of parallel light tube;
B) observe at the focal plane of measured lens with the defocusing amount measuring instrument, measure glass sieve plate and reach the standard grade to the spacing y ' of picture;
C) according to the line on the image planes spacing y ' and glass sieve plate are reached the standard grade to the relation between the spacing y,
Namely
Calculate the focal length of measured lens, the y ' that the defocusing amount measuring instrument is measured is actually through the defocusing amount measuring instrument and amplifies the numerical value of β after doubly, and the actual computation formula should be:
2. according to the concrete optical parametric of this optical system, determine the light path of this optical system and select suitable zoom mirror group.
3. measure visual field focal length and defocusing amount according to double-view field zoom defocusing amount measuring instrument, the distance (best adjustable range and the direction of position-limit mechanism) that the relative out of focus of zoom mirror visual field need to move forward and backward when calculating the desirable focal length of large small field of view, multiplying power and desirable large visual field (or small field of view).
If corresponding large and small visual field zoom mirror is respectively at d when slightly filling
1=119.6mm and d
1D will be got in=150.5mm position
1Step value be 0.001mm, as shown in Table 1, Lf
3Organize the operating distance of H3 after the expression, calculate adjustable range and the direction of large small field of view position-limit mechanism.
Table one
4. according to parfocalization position of focal plane and the large small field of view focal length of the best adjustable range of the position-limit mechanism that calculates and direction, expection, instruct assembling and setting, and reach the result of optimization.
The present invention is by utilizing defocusing amount and two the visual field focal lengths separately between defocusing amount measuring instrument measurement visual field, then utilize the parameters of this defocusing amount, focal length and optical system, the parfocalization position of focal plane of the best adjustable range of optimization position-limit mechanism and direction, expection and large small field of view focal length, instruct assembling and setting, and reach the result of optimization.The present invention is easy and simple to handle, can axially debug the axial variable-power optical system of double-view field, and precision is high.
Claims (4)
1. the Method of Adjustment of the axial variable-power optical system of double-view field, it is characterized in that: the concrete steps of this Method of Adjustment are as follows:
1). measure defocusing amount and two visual field focal lengths separately between two visual fields of size of the axial variable-power optical system of double-view field to be debug;
2). according to the concrete optical parametric of this optical system, determine the light path of this optical system and select suitable zoom mirror group;
3). the distance that the relative out of focus of zoom mirror visual field need to move forward and backward when utilizing the desirable focal length of large small field of view defocusing amount and small field of view focal length or the large large small field of view of visual field focal length optimization, multiplying power and desirable large visual field or small field of view;
4). parfocalization position of focal plane and large small field of view focal length according to the best adjustable range of the position-limit mechanism that calculates and direction, expection, instruct assembling and setting, and reach the result of optimization.
2. the Method of Adjustment of the axial variable-power optical system of double-view field according to claim 1, it is characterized in that: the measuring process of the defocusing amount of described step 1) is as follows:
Tested optical system is put on the fixed support, and adjusting pole makes the optical axis of system under test (SUT) roughly overlap with the optical axis of parallel light tube, and the X of adjusting measuring apparatus, Y-axis find a view field image surface position of tested optical system, and grating digital readout is shown the numerical value zero clearing;
Tested optical system is rotated to the another one visual field, and X-axis, the Y-axis of regulating the defocusing amount measuring instrument make it move forward and backward along optical axis direction, until find the image planes position of visual field, read the value on the grating digital readout, are the defocusing amount of these two visual fields.
3. the Method of Adjustment of the axial variable-power optical system of double-view field according to claim 2, it is characterized in that: the measuring process of described step 1) mid-focal length is as follows:
A) double-view field zoom telescopic system that will be to be debug is put on the support of defocusing amount measuring instrument, and adjusting pole makes the optical axis of system under test (SUT) roughly overlap with the optical axis of parallel light tube;
B) observe at the focal plane of measured lens with the defocusing amount measuring instrument, measure glass sieve plate and reach the standard grade to the spacing y ' of picture;
C) according to the line on the image planes spacing y ' and glass sieve plate are reached the standard grade to the relation between the spacing y,
Namely
Calculate the focal length of measured lens, the y ' that the defocusing amount measuring instrument is measured is actually through the defocusing amount measuring instrument and amplifies the numerical value of β after doubly, and the actual computation formula should be:
4. the Method of Adjustment of the axial variable-power optical system of double-view field according to claim 1, it is characterized in that: the optical parametric that relates to described step 2) comprises optical spherical surface radius, thickness, refractive index and clear aperature.
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| CN201210558442.9A CN103033946B (en) | 2011-12-19 | 2012-12-18 | Assembly and adjustment method of double-view-field axial zoom optical system |
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| CN201210558442.9A CN103033946B (en) | 2011-12-19 | 2012-12-18 | Assembly and adjustment method of double-view-field axial zoom optical system |
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Cited By (5)
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| CN105547493A (en) * | 2015-12-08 | 2016-05-04 | 中国航空工业集团公司洛阳电光设备研究所 | Assembling and adjusting method for three-field of view confocal plane in infrared imaging technology and imaging device |
| CN106773104A (en) * | 2016-12-26 | 2017-05-31 | 云南北方驰宏光电有限公司 | A kind of online quick compensation debugging device of LONG WAVE INFRARED continuous vari-focus and method |
| CN107525591A (en) * | 2017-08-23 | 2017-12-29 | 上海热像机电科技股份有限公司 | A kind of double-view field thermal imaging system and temp measuring method |
| CN111077629A (en) * | 2019-12-03 | 2020-04-28 | 中国航空工业集团公司洛阳电光设备研究所 | Double-view-field zooming optical system and shaft penetrating method |
| CN112630951A (en) * | 2020-11-28 | 2021-04-09 | 中国航空工业集团公司洛阳电光设备研究所 | Ball screw fixing part with high-reliability limiting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105547493A (en) * | 2015-12-08 | 2016-05-04 | 中国航空工业集团公司洛阳电光设备研究所 | Assembling and adjusting method for three-field of view confocal plane in infrared imaging technology and imaging device |
| CN105547493B (en) * | 2015-12-08 | 2019-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | The Method of Adjustment and imaging device of three view field confocal planes in infrared imagery technique |
| CN106773104A (en) * | 2016-12-26 | 2017-05-31 | 云南北方驰宏光电有限公司 | A kind of online quick compensation debugging device of LONG WAVE INFRARED continuous vari-focus and method |
| CN106773104B (en) * | 2016-12-26 | 2019-05-24 | 云南北方驰宏光电有限公司 | A kind of online quick compensation debugging device of LONG WAVE INFRARED continuous vari-focus and method |
| CN107525591A (en) * | 2017-08-23 | 2017-12-29 | 上海热像机电科技股份有限公司 | A kind of double-view field thermal imaging system and temp measuring method |
| CN111077629A (en) * | 2019-12-03 | 2020-04-28 | 中国航空工业集团公司洛阳电光设备研究所 | Double-view-field zooming optical system and shaft penetrating method |
| CN112630951A (en) * | 2020-11-28 | 2021-04-09 | 中国航空工业集团公司洛阳电光设备研究所 | Ball screw fixing part with high-reliability limiting device |
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