CN110186654A - A kind of longitudinal resolution test device - Google Patents
A kind of longitudinal resolution test device Download PDFInfo
- Publication number
- CN110186654A CN110186654A CN201910459755.0A CN201910459755A CN110186654A CN 110186654 A CN110186654 A CN 110186654A CN 201910459755 A CN201910459755 A CN 201910459755A CN 110186654 A CN110186654 A CN 110186654A
- Authority
- CN
- China
- Prior art keywords
- light
- transmitting plate
- longitudinal resolution
- test device
- resolution test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
- G01M11/0264—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested by using targets or reference patterns
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/04—Optical benches therefor
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention belongs to optical technology more particularly to a kind of longitudinal resolution test devices.Described device includes: the first light-transmitting plate and the second light-transmitting plate, first light-transmitting plate and second light-transmitting plate one end abut each other connection, the other end is attached by connection structure, so as to form the wedge-shaped air gap of thickness size gradual change between first light-transmitting plate and second light-transmitting plate.A kind of longitudinal resolution test device provided in an embodiment of the present invention can be simple and convenient and objectively tests longitudinal resolution；And measurement accuracy is high, and it is easy to make, it is low in cost, it is easy to accomplish.
Description
Technical field
The invention belongs to optical technology more particularly to a kind of longitudinal resolution test devices.
Background technique
In optical imaging field, in order to illustrate the ability of optical imaging system, the resolution of optical imaging system is usually used
Rate is measured.Wherein the resolution ratio of optical imaging system includes lateral resolution and longitudinal resolution, can by some test boards
Directly to measure lateral resolution, such as the standard resolution test board that Thorlab company provides, the test board is by a variety of differences
The vertical and horizontal line of dimension forms, which scale an optical imaging system can clearly be imaged onto, then illustrate the optical imaging system
Resolution ratio it is how high, this method is very convenient and practical.
Imaging system corresponding to lateral resolution is mainly for traditional optical system, such as microscope, magnifying glass etc.
Deng.And modern calculating imaging technique can do tomographic imaging, namely can not only make face imaging, while can make depth side
To imaging, such as optical coherent chromatographic imaging (OCT).And how to measure (namely longitudinal point of imaging resolution of depth direction
Resolution), there is no the longitudinal resolution test boards of standard at present.Engineering in practice, the method for above-mentioned measurement lateral resolution
It can not be used to test longitudinal resolution.In optical computing imaging technique, test for longitudinal resolution only passes through one
A reflecting mirror measures the point spread function of the reflecting mirror as imaging surface, to measure the true longitudinal direction of optical imaging system
Resolution ratio.But point spread function measurement is needed in best signal-to-noise ratio condition, measured under best system condition one group it is anti-
Then the data for penetrating mirror imaging make the imaging waveform that certain specific operation obtains reflecting mirror, then pass through measurement 3db strength retrogression
Numerical value calculate true longitudinal resolution, this method is bothersome laborious, complicated for operation.Moreover, different calculating imaging systems,
For example laser scanning co-focusing imaging, the imaging modes such as photoacoustic imaging, the measurement method of longitudinal resolution are different.Therefore mesh
The longitudinal resolution test method of preceding also none standard.
Secondly, not high enough using the accuracy of the method test longitudinal resolution of point spread function.The reason is that: it calculates point and expands
Dissipating numerical value used in the 3db length of function is the data acquired by data acquisition device, and the sample rate of data acquisition device
With bandwidth can not infinite height, therefore this sample loading mode measurement data be discrete values, so -3dB at it is true
Data point can only calculate its resolution ratio by way of interpolation.Under the influence of noise, the method for this measurement longitudinal resolution
There is large error, typical frequency sweep OCT system longitudinal resolution is about 2 μm~3 μm of measurement error of 10 μm~15 μm.
As it can be seen that the longitudinal resolution method of measurement optical imaging system is more complicated at present, precision is not high, general without energy
In the various longitudinal resolution test equipments and method for carrying out Depth Imaging.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of longitudinal resolution test device, it is intended to solve prior art test
The complicated and not accurate problem of optical imaging system longitudinal resolution.
The embodiments of the present invention are implemented as follows, a kind of longitudinal resolution test device, and described device includes:
First light-transmitting plate and the second light-transmitting plate, first light-transmitting plate and second light-transmitting plate one end abut each other company
It connects, the other end is attached by connection structure, so as to form thickness between first light-transmitting plate and second light-transmitting plate
The wedge-shaped air gap of size gradual change.
Further, first light-transmitting plate is to be fixedly connected or can be rotated with the end that is connected of second light-transmitting plate
Connection.
Further, first light-transmitting plate can be integrated or separately fabricated with second light-transmitting plate.
Further, first light-transmitting plate is to be fixedly connected with the end that is connected of second light-transmitting plate, the company
Binding structure is optical fiber, and the fiber gripper is fixed between first light-transmitting plate and second light-transmitting plate.
Further, the end that is connected of first light-transmitting plate and second light-transmitting plate is to be rotatably connected, described
Connection structure is retractable structure.
Further, maximal clearance is 20~120 microns between first light-transmitting plate and second light-transmitting plate.
Further, second light-transmitting plate is equipped with scale marker, and the scale marker is for indicating described second thoroughly
The current location of tabula rasa apart from the wedge-shaped air gap with a thickness of zero at distance.
Further, second light-transmitting plate is equipped with opaque scale plate, institute backwards to the side of first light-transmitting plate
It states and corresponds to scale on scale plate equipped with graduation mark, when for for optical imaging system test using the graduation mark as described in
Imageable target is observed.
A kind of longitudinal resolution test device provided in an embodiment of the present invention can simple and convenient and objective test it is longitudinal
Resolution ratio；And measurement accuracy is high, and it is easy to make, it is low in cost, it is easy to accomplish.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of longitudinal resolution test device provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram that longitudinal resolution test device uses provided in an embodiment of the present invention.
In attached drawing: 1, the first light-transmitting plate；2, the second light-transmitting plate；3, wedge-shaped air gap；4, optical fiber；5, graph paper.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific implementation of the invention is described in detail below in conjunction with specific embodiment.
It is structure chart and the use of a kind of longitudinal resolution test device provided in an embodiment of the present invention as shown in Fig. 1~2
Schematic diagram, the longitudinal resolution test device in the embodiment of the present invention include:
First light-transmitting plate 1 and the second light-transmitting plate 2, the first light-transmitting plate 1 and 2 one end of the second light-transmitting plate abut each other connection, separately
One end is attached by connection structure, so as to form the wedge of thickness size gradual change between the first light-transmitting plate 1 and the second light-transmitting plate 2
Shape the air gap 3.
In embodiments of the present invention, optical imaging system refers to by a variety of optics members such as lens, reflecting mirror, prism and diaphragm
The imaging system that part is combined into a certain order.When testing optical imaging system longitudinal resolution, longitudinal resolution is tested and is filled
It is placed between optical imaging system and imageable target, the first light-transmitting plate 1 is towards optical imaging system side, and the second light-transmitting plate
2 plate faces are vertical with the direction of observation of optical imaging system；By mobile longitudinal resolution test device, when passing through optical imagery system
System it is observed that clearly the image of imageable target when, corresponding wedge-shaped air gap thickness is in longitudinal resolution test device
For the resolution ratio of optical imaging system.Entire test process simple operations, convenient test do not need to carry out big data processing point
Analysis, greatly improves the test jobs efficiency of longitudinal resolution.
In embodiments of the present invention, by optical imaging system it is observed that clearly the image judgement of imageable target can be with
It is observed using more traditional limit, for example observes imaging contexts during moving longitudinal resolution test device, work as imaging
When after gradually clear by gradually obscuring, moves repeatedly and search the optimal position of clarity, be located as resolution ratio and most preferably test
Point, and then measure the wedge-shaped air gap thickness at this and the longitudinal resolution of optical imaging system can be obtained.
In embodiments of the present invention, the first light-transmitting plate 1 is to be fixedly connected or can turn with the end that is connected of the second light-transmitting plate 2
Dynamic connection；Meanwhile first light-transmitting plate 1 can be integrated with the second light-transmitting plate 2 or separately fabricated；In addition, the embodiment of the present invention
In the first light-transmitting plate and the second light-transmitting plate be transparent planarizing material, such as glass material specifically can select glass according to practical
The common components such as glass coverslip, the present invention do not enumerate other materials further.
Specifically, as shown in Figure 1, in embodiments of the present invention, the first light-transmitting plate 1 is connected with the second light-transmitting plate 2
To be fixedly connected, connection structure is optical fiber 4 at end, and fiber gripper is fixed between the first light-transmitting plate 1 and the second light-transmitting plate 2.Specifically
, optical fiber can be fixed between the first light-transmitting plate 1 and the second light-transmitting plate 2 by optical glue, and use ultraviolet light
The fixation that cured mode carries out optical fiber is irradiated, other common optical fiber installation fixed form present invention do not enumerate further
And description.
In other embodiments of the invention, the end that is connected of the first light-transmitting plate 1 and the second light-transmitting plate 2 is rotatably to connect
It connects, connection structure is retractable structure.Specifically, stretching structure may include that rotation respectively is fixed on the first light-transmitting plate and second
The first connecting rod of light-transmitting plate and the second connecting rod, and it is threadedly coupled the adjusting sleeve of first connecting rod and the second connecting rod.
By rotating regulating sleeve by the distance between first connecting rod and second connecting rod zoom, thus between adjusting wedge air
The maximal clearance thickness value of gap, preferably to test the longitudinal resolution of a variety of different and bigger span optical imaging systems
Rate meets greater demand.Specifically, the simple adjustment structure present invention is not further enumerated and is illustrated, those skilled in the art
Member is understood that and realizes in foregoing description of the invention.
In embodiments of the present invention, maximal clearance is 20~120 microns between the first light-transmitting plate 1 and the second light-transmitting plate 2, wedge
The thickness change of shape the air gap is slower, and the longitudinal resolution precision tested out is higher.
In embodiments of the present invention, the second light-transmitting plate 2 is equipped with scale marker, and scale marker is for indicating the second light-transmitting plate
2 current location apart from wedge-shaped air gap 3 with a thickness of zero at distance.Specifically, scale can make directly in the second light transmission
Engraving generation is carried out on plate, it can also be by external reference.For example, by pasting graph paper 5 in the second light transmission back, when
When just can clearly differentiate, corresponding wedge-shaped air gap thickness is exactly the longitudinal resolution of system for imaging, combines the at this time
One light-transmitting plate and the second light-transmitting plate angle and corresponding graduation range can calculate the thickness for locating the wedge-shaped air gap of the position
Degree, the i.e. longitudinal resolution of optical imaging system.Specifically, as shown in Fig. 2, by preset the air gap maximum value h and
The distance value L of gap maximum and zero clearance, and then can be found out by the graduation range l proportion of utilization relationship that graph paper 5 is recorded
The thickness of corresponding position wedge-shaped air gap, and then obtain the longitudinal resolution of optical imaging system.
In addition, in other embodiments of the invention, it can be on side of second light-transmitting plate 2 backwards to the first light-transmitting plate 1
Equipped with opaque scale plate, scale is corresponded on scale plate equipped with graduation mark, by graduation mark when for testing for optical imaging system
It is observed as imageable target, likewise, corresponding wedge-shaped air gap thickness is just when imaging just can be differentiated clearly
It is the longitudinal resolution of system, graduated scale is used to have both the effect as imageable target while determining graduation range, so that inspection
It surveys and has more simplicity.
In addition, in embodiments of the present invention, test device can be mounted on to accurate mobile platform, for example micrometer drives
Moving platform etc., precision when to guarantee that test device is mobile, and then guarantee the precision of test result.
A kind of longitudinal resolution test device provided in an embodiment of the present invention, can be from 0 gradually by building longitudinal size
The wedge-shaped air gap of increase, can be simple and convenient and objectively tests longitudinal resolution；And measurement accuracy is high, it is easy to make,
It is low in cost, it is easy to accomplish.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of longitudinal resolution test device, which is characterized in that described device includes:
First light-transmitting plate and the second light-transmitting plate, first light-transmitting plate and second light-transmitting plate one end abut each other connection, separately
One end is attached by connection structure, so as to form thickness size gradually between first light-transmitting plate and second light-transmitting plate
The wedge-shaped air gap of change.
2. longitudinal resolution test device according to claim 1, which is characterized in that first light-transmitting plate and described the
Two light-transmitting plates are connected end to be fixedly connected or being rotatably connected.
3. longitudinal resolution test device according to claim 1, which is characterized in that first light-transmitting plate and described the
Two light-transmitting plates can be integrated or separately fabricated.
4. longitudinal resolution test device according to claim 2, which is characterized in that first light-transmitting plate and described the
The end that is connected of two light-transmitting plates is is fixedly connected with, and the connection structure is optical fiber, and the fiber gripper is fixed on described first
Between light-transmitting plate and second light-transmitting plate.
5. longitudinal resolution test device according to claim 2, which is characterized in that first light-transmitting plate and described the
To be rotatably connected, the connection structure is retractable structure at the end that is connected of two light-transmitting plates.
6. longitudinal resolution test device according to claim 4 or 5, which is characterized in that first light-transmitting plate and institute
Stating maximal clearance between the second light-transmitting plate is 20~120 microns.
7. longitudinal resolution test device according to claim 1, which is characterized in that second light-transmitting plate, which is equipped with, to be carved
Scale is known, the scale marker be used to indicate the current location of second light-transmitting plate apart from the wedge-shaped air gap with a thickness of
Distance at zero.
8. longitudinal resolution test device according to claim 7, which is characterized in that second light-transmitting plate is backwards to described
The side of first light-transmitting plate is equipped with opaque scale plate, and scale is corresponded on the scale plate equipped with graduation mark, described in supplying
Optical imaging system is observed when testing using the graduation mark as the imageable target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459755.0A CN110186654B (en) | 2019-05-29 | 2019-05-29 | Longitudinal resolution testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459755.0A CN110186654B (en) | 2019-05-29 | 2019-05-29 | Longitudinal resolution testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110186654A true CN110186654A (en) | 2019-08-30 |
| CN110186654B CN110186654B (en) | 2021-04-06 |
Family
ID=67718707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910459755.0A Active CN110186654B (en) | 2019-05-29 | 2019-05-29 | Longitudinal resolution testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110186654B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112057050A (en) * | 2019-09-17 | 2020-12-11 | 苏州阿格斯医疗技术有限公司 | OCT system axial resolution measuring method |
| CN112957012A (en) * | 2021-02-01 | 2021-06-15 | 浙江省医疗器械检验研究院 | Axial resolution measuring device and method for optical interference tomography system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52110684A (en) * | 1976-03-15 | 1977-09-16 | Nippon Telegr & Teleph Corp <Ntt> | Measuring apparatus for refractive index distribution |
| GB2250884A (en) * | 1990-12-07 | 1992-06-17 | Philips Electronic Associated | Optical image sensing array with microscan |
| JPH11248597A (en) * | 1998-03-06 | 1999-09-17 | Nikon Corp | Method for measuring laser durability |
| CN1184927C (en) * | 2002-06-14 | 2005-01-19 | 清华大学 | Method and system of raising longitudinal resolution of optical coherent chromatographic imaging |
| CN101055343A (en) * | 2006-04-12 | 2007-10-17 | 明基电通信息技术有限公司 | Resolution-adjustable imaging device |
| CN103822971A (en) * | 2014-03-06 | 2014-05-28 | 北京理工大学 | Resolution detecting and calibrating method for ultrasonic microscope |
-
2019
- 2019-05-29 CN CN201910459755.0A patent/CN110186654B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52110684A (en) * | 1976-03-15 | 1977-09-16 | Nippon Telegr & Teleph Corp <Ntt> | Measuring apparatus for refractive index distribution |
| GB2250884A (en) * | 1990-12-07 | 1992-06-17 | Philips Electronic Associated | Optical image sensing array with microscan |
| JPH11248597A (en) * | 1998-03-06 | 1999-09-17 | Nikon Corp | Method for measuring laser durability |
| CN1184927C (en) * | 2002-06-14 | 2005-01-19 | 清华大学 | Method and system of raising longitudinal resolution of optical coherent chromatographic imaging |
| CN101055343A (en) * | 2006-04-12 | 2007-10-17 | 明基电通信息技术有限公司 | Resolution-adjustable imaging device |
| CN103822971A (en) * | 2014-03-06 | 2014-05-28 | 北京理工大学 | Resolution detecting and calibrating method for ultrasonic microscope |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112057050A (en) * | 2019-09-17 | 2020-12-11 | 苏州阿格斯医疗技术有限公司 | OCT system axial resolution measuring method |
| CN112057050B (en) * | 2019-09-17 | 2022-07-12 | 苏州阿格斯医疗技术有限公司 | OCT system axial resolution measuring method |
| CN112957012A (en) * | 2021-02-01 | 2021-06-15 | 浙江省医疗器械检验研究院 | Axial resolution measuring device and method for optical interference tomography system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110186654B (en) | 2021-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103278106B (en) | A kind of high accuracy high-space resolution long-range profile detection system | |
| CN100398980C (en) | Three-dimensional super-resolution confocal array scanning and micro-detecting method and device | |
| CN102494623B (en) | Method for measuring non-contact measuring device of optical surface center distance in lens | |
| CN104567719B (en) | A kind of high-space resolution long-range profile detection means and detection method | |
| US11959821B2 (en) | Comprehensive test platform for fluorescence microscope objective lenses | |
| CN103383247B (en) | A kind of Systems for optical inspection and device | |
| CN106767545A (en) | A kind of high accuracy high-space resolution angel measuring instrument and angle measurement method | |
| CN105181298A (en) | Multiple reflection type laser con-focal long focal length measuring method and device | |
| Haggerty et al. | Observing deformation and fracture of rock with speckle patterns | |
| CN111964600A (en) | High-precision biaxial optical extensometer and measuring method based on bidirectional view field separation | |
| CN110186654A (en) | A kind of longitudinal resolution test device | |
| CN102589466B (en) | Contour microscopic method | |
| CN103148800A (en) | Label-free three-dimensional microscope method based on light filed propagation and device | |
| CN107144237A (en) | Heavy caliber interferometer measuration system and algorithm based on three-dimensional splicing | |
| CN110161008A (en) | Common optical axis degree and amplification factor can self-alignment fluorescent grain tracing method and devices | |
| CN106404525A (en) | Apparatus for testing micro-nano structure mechanical properties of material | |
| CN110987357B (en) | Two-dimensional focusing laser differential interferometer and flat boundary layer density pulsation measurement method | |
| Su et al. | A new technique for measuring the affective focal length of a thick lens or a compound lens | |
| CN203216701U (en) | Aberration detection device for image transmitting optical fiber bundles | |
| CN109974603B (en) | Method for measuring center thickness of bilateral dislocation differential confocal lens | |
| CN108955582A (en) | Laser focal beam spot area measuring device | |
| CN205581024U (en) | Optical element surface defect detecting device of transmission type synthetic aperture digital holographic art | |
| CN104062753B (en) | A kind of photoelectric auto-collimator | |
| CN110375677B (en) | Device and method for detecting included angle between pointing direction of camera detector and installation surface of focal plane component | |
| CN207540764U (en) | A kind of fiber array end face detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |