CN211061152U - Lens detection equipment integrating field of view, modulation transfer function and centering measurement - Google Patents
Lens detection equipment integrating field of view, modulation transfer function and centering measurement Download PDFInfo
- Publication number
- CN211061152U CN211061152U CN201921869767.2U CN201921869767U CN211061152U CN 211061152 U CN211061152 U CN 211061152U CN 201921869767 U CN201921869767 U CN 201921869767U CN 211061152 U CN211061152 U CN 211061152U
- Authority
- CN
- China
- Prior art keywords
- lens
- transfer function
- optical lens
- modulation transfer
- field
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a lens check out test set of integrated visual field, modulation transfer function and centering measurement, including setting up a plurality of MTF measuring device outside optical axis of optical lens to be measured, setting up the test light source on the optical axis of optical lens to be measured, the test light source sets up in the optical lens to be measured one end that dorsad a plurality of MTF measuring device; the MTF measuring devices are arranged at a plurality of positions in an image field of the optical lens to be measured to measure a modulation transfer function; the MTF measuring devices can move in an arc along the outward radiation direction of the center of the image field of the optical lens to be measured. The lens detection equipment integrates a view field, a modulation transfer function and a centering measurement function, and has the advantages of multiple measurement items and high measurement speed.
Description
Technical Field
The utility model relates to a camera lens detection technology especially relates to a camera lens check out test set.
Background
The optical lens is a key optical element in the camera module and is used for focusing light rays and projecting the focused light rays onto the sensor for imaging, and the optical lens directly influences the imaging quality, so that the optical lens is detected before leaving a factory and is an important work.
In a patent document with publication number CN108982070A, an apparatus for detecting a modulation transfer function and centering an optical system is disclosed, which includes a plurality of MTF measuring devices disposed off-axis and a centering measuring device disposed on axis, the plurality of MTF measuring devices being disposed at a plurality of positions in an image field of the optical system to measure MTF values at a plurality of positions in the image field of the optical system, the centering measuring device being disposed at an image field center of the optical system to measure a lens centering degree of the optical system, which is suitable for industrial production, but has limited detection items, only an effective focal length E L F and a modulation transfer function MTF of the optical system can be detected, and some optical parameters (such as a field angle of view FOV, a chief ray incident angle CRA, and the like) related to a field of view cannot be detected.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies of the prior art, the utility model provides a camera lens check out test set has integrated visual field, modulation transfer function and centering measurement function, has the many, the fast advantage of measuring speed of measurement project.
The utility model discloses the technical problem that will solve realizes through following technical scheme:
a lens detection device integrating a field of view, a modulation transfer function and centering measurement comprises a plurality of MTF measuring devices arranged outside an optical axis of an optical lens to be detected and a test light source arranged on the optical axis of the optical lens to be detected, wherein the test light source is arranged at one end of the optical lens to be detected, which is opposite to the plurality of MTF measuring devices; the MTF measuring devices are arranged at a plurality of positions in an image field of the optical lens to be measured to measure a modulation transfer function; the MTF measuring devices can move in an arc along the outward radiation direction of the center of the image field of the optical lens to be measured.
The MTF measuring device is connected to the corresponding arc slide rail in a sliding mode, and the driving device is connected to drive the plurality of MTF measuring devices to do arc movement on the corresponding arc slide rail.
Further, the number of the driving devices is one, and all the MTF measuring devices are simultaneously connected and driven to perform circular arc movement on the corresponding circular arc slide rails, or the number of the driving devices is multiple, and the driving devices are respectively connected and driven to perform circular arc movement on the corresponding circular arc slide rails.
Further, the driving device comprises a driving motor or an adjustable air cylinder.
Further, the device also comprises a control device which is connected with the driving device so as to control the driving device.
Further, the device also comprises a centering measuring device arranged on the optical axis of the optical lens to be measured.
Furthermore, the device also comprises a lens tray which is provided with at least one tray hole for arranging the corresponding optical lens.
And the translation device is connected with the lens tray and used for driving the lens tray to move on a plane, and the plane is vertical to the optical axis of the optical lens to be detected.
Furthermore, a test sample is arranged on the light-emitting surface of the test light source or between the test light source and the optical lens to be tested.
Furthermore, the test sample graph is provided with a field scale mark and/or a cross mark.
The utility model discloses following beneficial effect has: the MTF measuring devices on the lens detection equipment can move in an arc along the outward radiation direction of the image field center of the optical lens to be detected, the MTF measuring devices move to the edge of imaging light projected by the test light source through the optical lens to be detected, the edge position of the imaging light can be determined through the light edge in an imaging picture, and then the image field range of the optical lens to be detected is determined, so that optical parameters (such as the field angle FOV, the chief ray incidence angle CRA and the like) related to the field of view of the optical lens to be detected can be measured, and the MTF measuring equipment has the advantages of multiple measuring items and high measuring speed.
Drawings
Fig. 1 is a schematic view of a lens inspection apparatus provided by the present invention;
fig. 2 is a schematic layout diagram of the MTF measuring device and the centering measuring device on the dome according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, a lens inspection apparatus integrating field of view, modulation transfer function and centering measurement includes a plurality of MTF measurement devices 2 disposed outside an optical axis of an optical lens 4 to be inspected and a test light source 5 disposed on the optical axis of the optical lens 4 to be inspected, where the test light source 5 is disposed at an end of the optical lens 4 to be inspected opposite to the plurality of MTF measurement devices 2; the MTF measuring devices 2 are arranged at a plurality of positions in the image field of the optical lens 4 to be measured to measure the modulation transfer function; the MTF measuring devices 2 can move in an arc along the outward radiation direction of the center of the image field of the optical lens 4 to be measured.
The MTF measuring devices 2 on the lens detection apparatus can move in an arc along an outward radiation direction of an image field center of the optical lens 4 to be measured, the MTF measuring devices 2 move to the edge of imaging light projected by the test light source 5 through the optical lens 4 to be measured, the edge position of the imaging light can be determined through the light edge in an imaging picture, and then the image field range of the optical lens 4 to be measured is determined, so that optical parameters (such as a field angle FOV, a chief ray incident angle CRA and the like) of the optical lens 4 to be measured related to a field of view can be measured, and the MTF measuring apparatus has the advantages of multiple measuring items and high measuring speed.
The lens detection equipment further comprises a centering measuring device 3 arranged on an optical axis of the optical lens 4 to be detected, the MTF measuring devices 2 are used for measuring modulation transfer functions of the optical lens 4 to be detected on different image field positions, and the centering measuring device 3 is used for detecting the centering degree of the optical lens 4 to be detected. Since the specific steps and principles of MTF measurement and centering measurement are prior art, the method steps in the patent document with publication number CN108982070A can be used and are not described much.
In this embodiment, the MTF measuring device 2 and the centering measuring device 3 are both CCD cameras.
In the plurality of MTF measuring devices 2, the arc movement of each two MTF measuring devices 2 is symmetrical with the center of the image field of the optical lens 4 to be measured, and preferably includes at least two MTF measuring devices 2 moving in an X direction and two other MTF measuring devices 2 moving in an Y direction, where the X direction is perpendicular to the Y direction and corresponds to the transverse image field and the longitudinal image field of the optical lens 4 to be measured, respectively.
The lens detection equipment further comprises a plurality of arc slide rails 9 and a driving device 8, wherein the arc slide rails 9 and the driving device 8 are arranged along the outward radiation direction of the image field center of the optical lens 4 to be detected, the MTF measuring devices 2 are connected to the corresponding arc slide rails 9 in a sliding mode, and the driving device 8 is connected to drive the plurality of MTF measuring devices 2 to do arc movement on the corresponding arc slide rails 9.
The lens detection device also comprises a dome 1, wherein the center of the dome 1 is positioned on the axis of an optical lens 4 to be detected; the arc slide rails 9 are arranged on the dome 1.
In this embodiment, the dome 1 is provided with a plurality of arc assembling grooves for assembling corresponding arc sliding rails 9, the plurality of MTF measuring devices 2 and the centering measuring device 3 are located on one side of the intrados of the dome 1, wherein the centering measuring device 3 is located at the center of the dome 1; the driving device 8 is positioned on the outer arc surface side of the dome 1.
The number of the driving devices 8 is one, and all the MTF measuring devices 2 are simultaneously connected and driven to perform circular arc movement on the corresponding circular arc slide rails 9, or the number of the driving devices 8 is multiple, and the driving devices are respectively connected and driven to perform circular arc movement on the corresponding circular arc slide rails 9 by the corresponding MTF measuring devices 2.
In this embodiment, the driving device 8 may include a driving motor or an adjustable cylinder, and the MTF measuring devices 2 are driven to move in an arc by one or more driving motors or adjustable cylinders.
The lens detection apparatus further includes a control device connected to the driving device 8 to control the driving device 8.
The lens detection equipment further comprises a lens tray 7 and a translation device connected with the lens tray 7, wherein at least one tray hole used for arranging the corresponding optical lens 4 to be detected is formed in the lens tray 7, the translation device is used for driving the lens tray 7 to move on a plane, and the plane is perpendicular to the optical axis of the optical lens 4 to be detected.
The translation device can drive the lens tray 7 to perform switching movement and alignment movement on a plane, and in the switching movement, the translation device switches the optical lens 4 to be measured on the lens tray 7, which is aligned with the centering measurement device 3, to one step so as to sequentially perform field parameters, modulation transfer functions, centering measurement and the like on each optical lens 4 to be measured on the lens tray 7; in the alignment movement, the translation device controls the lens tray 7 to perform micro-movement, so that the optical lens 4 to be measured on the lens tray 7 is aligned with the centering measurement device 3.
The test light source 5, the MTF measuring devices 2 and the driving devices 8 thereof, the centering measuring device 3 and the translation device are all connected to the driving devices 8 and controlled by the driving devices 8.
The control device may be a personal computer.
A test pattern 6 is arranged on the light-emitting surface of the test light source 5 or between the test light source 5 and the optical lens 4 to be measured, a view field scale mark and/or a cross mark are/is arranged on the test pattern 6, the MTF value and the centering degree of the optical lens 4 to be measured can be measured by identifying the definition and the position of the cross mark in the imaging pictures of the plurality of MTF measuring devices 2 and the centering measuring device 3, and the view field angle of the optical lens 4 to be measured can be measured by identifying the view field scale mark in the imaging pictures of the plurality of MTF measuring devices 2.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but the invention can not be understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by adopting the equivalent substitution or equivalent transformation should fall within the protection scope of the present invention.
Claims (10)
1. A lens detection device integrating a field of view, a modulation transfer function and centering measurement comprises a plurality of MTF measuring devices arranged outside an optical axis of an optical lens to be detected and a test light source arranged on the optical axis of the optical lens to be detected, wherein the test light source is arranged at one end of the optical lens to be detected, which is opposite to the plurality of MTF measuring devices; the MTF measuring devices are arranged at a plurality of positions in an image field of the optical lens to be measured to measure a modulation transfer function; the MTF measuring device is characterized in that the MTF measuring devices can move in an arc along the outward radiation direction of the image field center of the optical lens to be measured.
2. The lens detection apparatus integrating field of view, modulation transfer function and centering measurement according to claim 1, further comprising a plurality of arc slide rails disposed along an outward radial direction of a center of an image field of the optical lens to be measured, and a driving device, wherein the MTF measuring device is slidably connected to the corresponding arc slide rails, and the driving device is connected to drive the plurality of MTF measuring devices to perform arc movement on the corresponding arc slide rails.
3. The lens detection apparatus integrating field of view, modulation transfer function and centering measurement according to claim 2, wherein the number of the driving devices is one, and all MTF measuring devices are simultaneously driven to perform circular arc movement on the corresponding circular arc slide rails, or the number of the driving devices is plural, and the driving devices are respectively connected to and driven to perform circular arc movement on the corresponding circular arc slide rails.
4. A lens detection apparatus integrating field of view, modulation transfer function and centering measurement according to claim 2 or 3, characterized in that the driving means comprises a driving motor or an adjustable air cylinder.
5. A lens inspection apparatus integrating field of view, modulation transfer function and centering measurement according to claim 2 or 3, further comprising a control device connected to the driving device to control the driving device.
6. The lens inspection apparatus integrating field of view, modulation transfer function and centering measurement of claim 1, further comprising a centering measurement device disposed on an optical axis of the optical lens under test.
7. The integrated field of view, modulation transfer function and centration measurement lens detection apparatus according to claim 1, further comprising a lens tray having at least one tray aperture for positioning a corresponding measurement optical lens.
8. The apparatus of claim 7, further comprising a translation device coupled to the lens tray for moving the lens tray on a plane perpendicular to an optical axis of the optical lens to be measured.
9. The lens detection equipment integrating field of view, modulation transfer function and centering measurement according to claim 1, wherein a test pattern is disposed on a light emitting surface of the test light source or between the test light source and the optical lens to be tested.
10. The integrated field of view, modulation transfer function and centering measurement lens inspection device of claim 9, wherein said test pattern has field of view graduations and/or cross-hairs thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921869767.2U CN211061152U (en) | 2019-11-01 | 2019-11-01 | Lens detection equipment integrating field of view, modulation transfer function and centering measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921869767.2U CN211061152U (en) | 2019-11-01 | 2019-11-01 | Lens detection equipment integrating field of view, modulation transfer function and centering measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211061152U true CN211061152U (en) | 2020-07-21 |
Family
ID=71591476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921869767.2U Active CN211061152U (en) | 2019-11-01 | 2019-11-01 | Lens detection equipment integrating field of view, modulation transfer function and centering measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211061152U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929039A (en) * | 2020-09-18 | 2020-11-13 | 宁波丞达精机有限公司 | MTF detection mechanism of optical lens |
| CN114252241A (en) * | 2020-09-25 | 2022-03-29 | 全欧光学检测仪器有限公司 | MTF test equipment and application thereof |
| CN114910254A (en) * | 2022-07-14 | 2022-08-16 | 歌尔光学科技有限公司 | Testing device |
-
2019
- 2019-11-01 CN CN201921869767.2U patent/CN211061152U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929039A (en) * | 2020-09-18 | 2020-11-13 | 宁波丞达精机有限公司 | MTF detection mechanism of optical lens |
| CN114252241A (en) * | 2020-09-25 | 2022-03-29 | 全欧光学检测仪器有限公司 | MTF test equipment and application thereof |
| CN114910254A (en) * | 2022-07-14 | 2022-08-16 | 歌尔光学科技有限公司 | Testing device |
| CN114910254B (en) * | 2022-07-14 | 2022-11-22 | 歌尔光学科技有限公司 | Testing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211061152U (en) | Lens detection equipment integrating field of view, modulation transfer function and centering measurement | |
| CN110006905B (en) | Large-caliber ultra-clean smooth surface defect detection device combined with linear area array camera | |
| KR100793182B1 (en) | Apparatus and method for detecting defects in wafer using line sensor camera | |
| CN1215543C (en) | Apparatus used for evaluating polycrystalline silicon film | |
| US8339463B2 (en) | Camera lens calibration system | |
| CN110411346B (en) | Method for quickly positioning surface micro-defects of aspheric fused quartz element | |
| US20110128368A1 (en) | Hole Inspection Method and Apparatus | |
| WO2020048148A1 (en) | Surface defect measurement method based on spectral confocal sensor | |
| CN212206548U (en) | Optical lens MTF testing device | |
| CN211830951U (en) | Image acquisition device | |
| CN103038603A (en) | Apparatus and method for three dimensional inspection of wafer saw marks | |
| CN102735699B (en) | For the positioning mark system of x-ray inspection aftertreatment | |
| CN105486690A (en) | Optical detection device | |
| RU2013154761A (en) | SCREW BLADE EXAMINATION | |
| KR20210099172A (en) | Apparatus, method and computer program product for inspection of at least side faces of semiconductor devices | |
| KR20190032475A (en) | Machine vision systems and alignment devices for substrate alignment | |
| CN206818145U (en) | CCD photoelectric detection systems | |
| CN209992407U (en) | Large-caliber ultra-clean smooth surface defect detection device combined with linear array camera | |
| CN101673043A (en) | Wide-angle distortion testing system and method | |
| JP2008198966A (en) | Wafer defect inspection device | |
| CN105046650A (en) | Machine vision-based image mosaic method for small module gear detection process | |
| CN102003941B (en) | Large mooring chain five-ring length measurement method and device based on vision | |
| US4279513A (en) | Optical inspection system for large parts and for multiple measurements | |
| TWM623844U (en) | Lens test device | |
| KR101351004B1 (en) | Carrying apparatus having camera array detecting defects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |