CN110057554A - The MTF detection device and detection method of zoom lens image quality - Google Patents

The MTF detection device and detection method of zoom lens image quality Download PDF

Info

Publication number
CN110057554A
CN110057554A CN201910434495.1A CN201910434495A CN110057554A CN 110057554 A CN110057554 A CN 110057554A CN 201910434495 A CN201910434495 A CN 201910434495A CN 110057554 A CN110057554 A CN 110057554A
Authority
CN
China
Prior art keywords
zoom lens
zoom
detection
mtf
focusing
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.)
Pending
Application number
CN201910434495.1A
Other languages
Chinese (zh)
Inventor
王昆
江化嫏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FUZHOU ICAMSYS PHOTOELECTRIC TECHNOLOGY Co Ltd
Original Assignee
FUZHOU ICAMSYS PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FUZHOU ICAMSYS PHOTOELECTRIC TECHNOLOGY Co Ltd filed Critical FUZHOU ICAMSYS PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority to CN201910434495.1A priority Critical patent/CN110057554A/en
Publication of CN110057554A publication Critical patent/CN110057554A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02Testing optical properties
    • G01M11/0207Details of measuring devices
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification

Abstract

The present invention relates to the MTF detection devices and detection method of zoom lens image quality, zoom lens includes body tube, Zoom lens barrel and focusing barrel, MTF detection device includes rack, the detection station being set in rack, the sliding platform being set in rack, sliding driving device, installs case, camera lens adapted seat, Zoom regulating mechanism and focus adjusting mechanism, and MTF detection device further includes the reticule assembly being set in installs case and on the optical axis direction of zoom lens and the projection imaging component for being set to the detection station other side.The device is using the fixed body tube of camera lens adapted seat, then Zoom lens barrel is driven to carry out zoom with Zoom regulating mechanism, focusing barrel is driven to be focused with focus adjusting mechanism, realize automatic focusing when zoom lens or multifocal lens imaging quality testing and focusing, it is not only high-efficient, and the automatic detection for zoom lens or the MTF of multifocal lens imaging quality provides possibility.

Description

The MTF detection device and detection method of zoom lens image quality
Technical field
The present invention relates to optical lens detection field, in particular to a kind of MTF detection device of zoom lens image quality And detection method.
Background technique
Currently, detection zoom and multifocal camera lens image quality method substantially have it is several: 1, using on optical bench put down The method that row light pipe in-plane is pivoted.First observe image quality on the axis of camera lens focal length end;Then, parallel light tube is rotated left and right To the angle of the peripheral field of focal length, to observe the image quality of edge light beam.In the case where amplifying observation system focal plane is constant, to When survey camera lens changes to another focal length, by the method for measurement focal length image quality, the image quality of this focal length is detected.In addition, adjusting Burnt and focusing is both needed to manually complete, it is clear that this method is inefficient.
2, using lens imaging quality projection detector.Its image-forming principle is: by the LED illumination after homogenizing, point Draw plate on different resolutions pattern, projected on screen or wall through camera lens to be measured, with human eye go interpretation camera lens at image quality Amount.This method is also required to be focused and focused manually, low efficiency.
3, be directly installed on video camera using camera lens to be measured, to the TV resolution pattern of amplification, shot, then with height Resolution LCD screen is observed.It also needs to be focused and focused manually.
Summary of the invention
It is an object of the invention to overcome disadvantage mentioned above, provide a kind of zoom lens image quality MTF detection device and Then detection method, the device and detection method drive zoom with Zoom regulating mechanism using the fixed body tube of camera lens adapted seat Lens barrel carry out zoom, with focus adjusting mechanism drive focusing barrel be focused, realize zoom lens or multifocal camera lens at Automatic focusing and focusing when as quality testing, it is not only high-efficient, but also be zoom lens or multifocal lens imaging quality The automatic detection of MTF provides possibility.
The present invention is implemented as follows:
Scheme (one):
A kind of MTF detection device of zoom lens image quality, the zoom lens include body tube, are rotationally connected with master On lens barrel for drive zoom lens carry out the Zoom lens barrel of zoom and be rotationally connected on body tube in zoom The focusing barrel for driving zoom lens to be focused after to specified focal length, it is characterised in that: the MTF detection device includes machine Frame, the detection station being set in rack are set in rack and positioned at detection station side for driving zoom lens to move It is dynamic to be used to drive sliding platform phase to enter or leave the sliding platform of detection station, be connected between rack and sliding platform To the sliding driving device of housing slide, the installs case being fixedly arranged on sliding platform, it is fixedly arranged on installs case upper surface and is used for Place the camera lens adapted seat of zoom lens and fixed body tube position, be set between installs case and Zoom lens barrel for driving Zoom lens barrel carries out the Zoom regulating mechanism of zoom relative to body tube rotation and is set in rack and is located at detection station On for driving focusing barrel with respect to focus adjusting mechanism of the body tube rotation to be focused, the MTF detection device is also It is used to provide image test chart for zoom lens on optical axis direction including being set in installs case and being located at zoom lens Reticule assembly and the projection imaging component for being set to the detection station other side.
The MTF detection device of zoom lens image quality provided by the invention, when in use, first by the primary mirror of zoom lens Cylinder is mounted in camera lens adapted seat, and then sliding driving device drives sliding platform to drive zoom lens to enter detection station, Then Zoom regulating mechanism drives Zoom lens barrel to rotate relative to body tube to be adjusted to the focal length for needing to measure, focus adjusting mechanism band Dynamic focusing barrel is with respect to body tube rotation so that pattern in the reticule assembly shape in projection imaging component after zoom lens At clearly image, the then image quality of artificial interpretation camera lens, or using MTF analyzer measure automatically camera lens at image quality Amount.
In order to be able to achieve autozoom, the Zoom regulating mechanism include be rotationally connected on reticule assembly and be adapted to The zoom turntable of the axis coaxle of seat, the zoom drive motor being fixedly arranged in installs case, coaxially to be fixedly arranged on zoom drive motor defeated Be meshed on shaft and with zoom turntable periphery transmission Zoom driving gear and be set to zoom turntable in the radial direction Zoom clamping cylinder, the zoom clamping cylinder cylinder body end is fixedly arranged on zoom turntable and jaw end is held on outside Zoom lens barrel Week.
In order to realize automatic focusing after zooming to specified focal length, the focus adjusting mechanism includes being fixedly arranged in rack And be located at the mounting plate in detection station, be rotationally connected on mounting plate and with the focusing turntable of the axis coaxle of adapted seat, solid Focusing driving motor on mounting plate is coaxially fixedly arranged on focusing driving motor output shaft and nibbles with phase outside turntable is focused The focusing driving gear of conjunction transmission and the clamping element for being used to clamp focusing barrel being set on focusing turntable, the mounting plate Avoid holes for protruding into for zoom lens are equipped on turntable with focusing.
In order to preferably clamp focusing barrel, the clamping element includes two and is fixedly arranged on the cunning focused on turntable in parallel Rail, two pieces be slidably connected on sliding rail and can opposite sliding with the gripping block of clamp or release focusing barrel and be connected to two pieces Between gripping block for driving the focusing clamping cylinder of the opposite sliding of two pieces of gripping blocks, the inner end of two pieces of gripping blocks be equipped with and The arc that focusing barrel periphery matches clamps face, and the clamping element further includes the buffer spring being connected between two pieces of gripping blocks And it is fixedly arranged on the stop screw for being used to limit two pieces of gripping block outer end positions on mounting plate.
Adjustable in order to be able to achieve graticle module, to adapt to the camera lens of different size, the reticule assembly includes graduation Plate module and the XY for driving graduation plate module mobile relative to zoom lens being connected between rack and graduation plate module Axis slide unit and Z axis slide unit.
In order to preferably drive sliding platform to be slided with respect to rack, the sliding platform is in T-shaped and " T " word Lower end is slidably connected in rack, and the sliding driving device includes being fixedly arranged in rack and the glide direction phase with sliding platform Parallel guide rod is slidably connected on guide rod and pushing block that one end is fixedly connected with " T " the word lower end of sliding platform, even The ball-screw that is connected between rack and pushing block and be connected between rack and ball-screw for driving ball-screw The sliding driving motor of rotation.
For preferably fixed zoom lens, to guarantee that the measurement accuracy of camera lens, camera lens adapted seat include being fixedly arranged on installation Mounting base on case upper surface, the mounting base are equipped with the installation circular hole that diameter and body tube outer diameter match, the installation The side wall of circular hole is equipped with notch, the camera lens adapted seat further include protrude into notch to body tube carry out the fixed compression bar of press and Being connected between installs case upper surface and compression bar is used to drive compression bar to carry out the fixed press cylinder of press to body tube.
In order to be able to achieve zoom lens or multifocal lens imaging quality MTF automatic detection, the projection imaging Component is MTF analyzer, and the MTF analyzer includes the object that multiple measurement requests according to zoom lens are distributed in zoom lens The digital camera of square side and the controller being connected respectively with each digital camera, each digital camera and zoom The angle of camera lens optical axis is less than or equal to the half at zoom lens maximum field of view angle and the optical axis of each digital camera is directed at change The object space principal point of zoom lens, the controller also respectively with sliding driving device, Zoom regulating mechanism and focus adjusting mechanism phase Connection.
For the ease of manually carrying out seeing that picture, the projection imaging component are projection curtain or projection wall.
Scheme (two):
A kind of MTF detection method of zoom lens image quality, it is characterised in that: method includes the following steps:
1. the body tube of zoom lens is mounted in camera lens adapted seat, then sliding driving device driving sliding platform with Zoom lens is driven to enter detection station;
2. Zoom regulating mechanism drives Zoom lens barrel to rotate relative to body tube to be adjusted to the focal length for needing to measure;
3. focus adjusting mechanism drives focusing barrel to be rotated relative to body tube so that the pattern in reticule assembly is through zoom Clearly image is formed after camera lens in projection imaging component;
4. according to step, 3. the middle image formed calculates zoom lens in the mtf value of the coke section;
5. repeat step 2.~4., until the mtf value of all focal lengths that need to be measured all has measured;
6. the mtf value that each focometry goes out is compared with the standard value of setting respectively, show that zoom lens is imaged The grade of quality;
7. sliding platform resets, zoom lens is taken out, the measurement that another zoom lens carries out next time is packed into and prepares.
For the prior art, the invention has the following advantages that
(1) the MTF detection device and detection method of zoom lens image quality provided by the invention, the device and detection side Then method is driven Zoom lens barrel to carry out zoom, is used focus adjustment using the fixed body tube of camera lens adapted seat with Zoom regulating mechanism Mechanism drives focusing barrel to be focused, realize automatic focusing when zoom lens or multifocal lens imaging quality testing and It focuses, it is not only high-efficient, and also providing for the automatic detection of zoom lens or the MTF of multifocal lens imaging quality can Energy;
(2) the MTF detection device of zoom lens image quality provided by the invention, Zoom regulating mechanism are clamped using zoom Cylinder clamps Zoom lens barrel periphery, and is driven using gear turntable, it can be achieved that autozoom, adjusting are precisely, ingenious in design;
(3) the MTF detection device of zoom lens image quality provided by the invention, focus adjusting mechanism is using two pieces of clampings Block is driven using gear turntable, it can be achieved that automatic focusing, passes through focus adjusting mechanism to clamp focusing barrel periphery It finely tunes to reach the fine tuning to image height, adjusts precisely, it is ingenious in design;
(4) the MTF detection device of zoom lens image quality provided by the invention, graduation plate module is adjustable, can be according to not Burnt position adjusts graduation plate module after the flange of same specification camera lens, burnt position after the accurate flange for determining different size camera lens, It is applicable to the camera lens of various different sizes, is had a wide range of application;
(5) the MTF detection device of zoom lens image quality provided by the invention, sliding platform can drive zoom lens into Enter or leave detection station, in order to the handling of zoom lens;
(6) the MTF detection device of zoom lens image quality provided by the invention, camera lens adapted seat is using compression bar to zoom Camera lens carries out press fixation, solves in the prior art because manufacturing tolerance causes some camera lenses that cannot preferably consolidate in adapted seat The problem for determining measurement inaccuracy occur, improves the precision and accuracy of measurement;
(7) the MTF detection device of zoom lens image quality provided by the invention, projection imaging component are analyzed using MTF Instrument, it can be achieved that zoom lens in short focus, middle burnt, three end of focal length automatic measurement;
(8) the MTF detection device of zoom lens image quality provided by the invention measures convenient, high-efficient, service performance Reliably, application easy to spread.
Detailed description of the invention
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the structural schematic diagram of the MTF detection device of zoom lens image quality of the present invention;
Fig. 2 be installs case of the present invention, camera lens adapted seat, Zoom regulating mechanism and reticule assembly structural schematic diagram;
Fig. 3 is the structural schematic diagram that installs case is removed in Fig. 2;
Fig. 4 is the structural schematic diagram of camera lens adapted seat in Fig. 2;
Fig. 5 is the structural schematic diagram of reticule assembly of the present invention;
Fig. 6 is the structural schematic diagram of focus adjusting mechanism of the present invention;
Fig. 7 is the structural schematic diagram of sliding platform and sliding driving device of the present invention;
Fig. 8 is the structural schematic diagram at another visual angle of sliding platform and sliding driving device of the present invention;
Fig. 9 is the structural schematic diagram of zoom lens of the present invention.
Symbol description in figure: 1, zoom lens, 11, body tube, 12, Zoom lens barrel, 13, focusing barrel, 2, rack, 3, cunning Moving platform, 4, sliding driving device, 41, guide rod, 42, pushing block, 43, ball-screw, 44, sliding driving motor, 5, installation Case, 6, camera lens adapted seat, 61, mounting base, 611, installation circular hole, 62, compression bar, 63, press cylinder, 7, Zoom regulating mechanism, 71, Zoom turntable, 72, zoom drive motor, 73, Zoom driving gear, 74, zoom clamping cylinder, 8, focus adjusting mechanism, 81, peace Loading board, 82, focusing turntable, 83, focusing driving motor, 84, focusing driving gear, 85, clamping element, 851, sliding rail, 852, clamping Block, 8521, arc clamping face, 853, focusing clamping cylinder, 854, buffer spring, 855, stop screw, 9, reticule assembly, 91, graduation plate module, 92, XY axis slide unit, 93, Z axis slide unit, 10, projection imaging component.
Specific embodiment
The content of present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification:
Specific embodiment (one):
It as shown in figs. 1-9, is a kind of MTF detection device of zoom lens image quality provided by the invention, the change Zoom lens 1 include body tube 11, the Zoom lens barrel for being used to that zoom lens 1 to be driven to carry out zoom being rotationally connected on body tube 11 12 and be rotationally connected on body tube 11 for driving the focusing that is focused of zoom lens 1 after zooming to specified focal length Lens barrel 13, it is characterised in that: the MTF detection device includes rack 2, the detection station being set in rack 2, is set to rack On 2 and be located at detection station side for driving zoom lens 1 mobile with enter or leave detection station sliding platform 3, Being connected between rack 2 and sliding platform 3 is used to drive sliding platform 3 with respect to the sliding driving device 4 that rack 2 is slided, admittedly Installs case 5 on sliding platform 3, be fixedly arranged on 5 upper surface of installs case for placing zoom lens 1 and fixed body tube The camera lens adapted seat 6 of 11 positions, be set between installs case 5 and Zoom lens barrel 12 for driving Zoom lens barrel 12 with respect to primary mirror 11 rotation of cylinder is used to drive to carry out the Zoom regulating mechanism 7 of zoom and be set in rack 2 and be located in detection station The focus adjusting mechanism 8 that focusing barrel 13 is rotated relative to body tube 11 to be focused, the MTF detection device further include setting It is used to provide the graticle of image test chart for zoom lens 1 in installs case 5 and on the optical axis direction of zoom lens 1 Component 9 and the projection imaging component 10 for being set to the detection station other side.
As shown in Figure 2 and Figure 3, in order to be able to achieve autozoom, the Zoom regulating mechanism 7 includes being rotationally connected with graduation On board group part 9 and with the zoom turntable 71 of the axis coaxle of adapted seat 6, the zoom drive motor 72 being fixedly arranged in installs case 5, same Axis be fixedly arranged on 72 output shaft of zoom drive motor and the Zoom driving gear 73 for the transmission that is meshed with 71 periphery of zoom turntable with And it is set to the zoom clamping cylinder 74 in the radial direction of zoom turntable 71,74 cylinder body end of zoom clamping cylinder is fixedly arranged on On zoom turntable 71 and jaw end is held on 12 periphery of Zoom lens barrel.
As shown in fig. 6, in order to realize automatic focusing after zooming to specified focal length, the focus adjusting mechanism 8 includes It is fixedly arranged on the mounting plate 81 in rack 2 and being located in detection station, is rotationally connected with the axis on mounting plate 81 and with adapted seat 6 Coaxial focusing turntable 82, the focusing driving motor 83 being fixedly arranged on mounting plate 81, to be coaxially fixedly arranged on focusing driving motor 83 defeated The use that the focusing of transmission that is meshed on shaft and with focusing 82 periphery of turntable drives gear 84 and is set on focusing turntable 82 In the clamping element 85 for clamping focusing barrel 13, it is equipped on the mounting plate 81 and focusing turntable 82 for being stretched for zoom lens 1 The avoid holes entered.
As shown in fig. 6, in order to preferably clamp focusing barrel, the clamping element 85 includes two and is fixedly arranged on focusing in parallel 851, two pieces of sliding rail on turntable 82 are slidably connected on sliding rail 851 and opposite can slide with clamp or release focusing barrel 13 Gripping block 852 and the focusing for driving two pieces of gripping blocks 852 to slide relatively being connected between two pieces of gripping blocks 852 clamp Cylinder 853, the inner end of two pieces of gripping blocks 852 is equipped with the arc to match with 13 periphery of focusing barrel and clamps face 8521, described Clamping element 85 further includes that the buffer spring 854 being connected between two pieces of gripping blocks 852 and being fixedly arranged on mounting plate 81 is used for Limit the stop screw 855 of two pieces of 852 outer end positions of gripping block.
As shown in figure 5, it is adjustable in order to be able to achieve graticle module, to adapt to the camera lens of different size, the graduation board group Part 9 include graduation plate module 91 and be connected between rack 2 and graduation plate module 91 for driving 91 phase of graduation plate module The XY axis slide unit 92 and Z axis slide unit 93 mobile to zoom lens 1.The graduation plate module 91 includes light source, uniform light board, with mirror The not graticle of rate unit pattern.Graduation plate module 91 can be finely adjusted on the direction XY makes resolution unit pattern be located at change On the center of zoom lens 1.The camera lens of different size before detection, first need to demarcate flange with the standard lens of this specification It is burnt afterwards, that is, determine the position of graticle.
As shown in Figure 7, Figure 8, in order to preferably drive sliding platform to be slided with respect to rack, the sliding platform 3 Be slidably connected in rack 2 in T-shaped and " T " word lower end, the sliding driving device 4 include be fixedly arranged in rack 2 and with The parallel guide rod 41 of the glide direction of sliding platform 3 is slidably connected on guide rod 41 and one end and sliding platform 3 Pushing block 42 that " T " word lower end is fixedly connected, the ball-screw 43 being connected between rack 3 and pushing block 42 and it is connected to machine The sliding driving motor 44 for driving ball-screw 43 to rotate between frame 2 and ball-screw 43.
As shown in figure 4, for preferably fixed zoom lens, to guarantee that the measurement accuracy of camera lens, camera lens adapted seat 6 include The mounting base 61 being fixedly arranged on 5 upper surface of installs case, the mounting base 61 are equipped with what diameter matched with 11 outer diameter of body tube Circular hole 611 is installed, the side wall of the installation circular hole 611 is equipped with notch, and the camera lens adapted seat 6 further includes protruding into notch to primary mirror Cylinder 11 carries out the fixed compression bar 62 of press and is connected between 5 upper surface of installs case and compression bar 62 to be used to drive compression bar 62 right Body tube 11 carries out the fixed press cylinder 63 of press.
As shown in Figure 1, in order to be able to achieve the automatic detection of the MTF of zoom lens or multifocal lens imaging quality, institute Stating projection imaging component 10 is MTF analyzer, and the MTF analyzer includes that multiple measurement requests according to zoom lens 1 are distributed Digital camera and the controller that is connected with each digital camera respectively in the object space side of zoom lens 1, it is each The angle of digital camera and 1 optical axis of zoom lens is less than or equal to the half at 1 maximum field of view angle of zoom lens and each number Video camera optical axis alignment zoom lens 1 object space principal point, the controller also respectively with sliding driving device 4, zooming adjustment Mechanism 7 is connected with focus adjusting mechanism 8.MTF analyzer can be used disclosed in patent of invention ZL201610078327.X Infinite conjugate optical path measures the device of the modulation transfer function of optical lens.In the present embodiment, multifocal in order to quickly measure Image quality of the point camera lens in long, medium and short coke, it is integrated to use three layers of multi-probe inverse projection MTF instrument.Due to multifocal mirror The focal length of head focal length is not grown, and aperture is little, and entrance pupil is not far from the first face, calculation shows that their mutual distance quite connects Closely.Although coke is in lens barrel in length, because its field angle is smaller, so will not be light-blocking, be conducive to the distribution of multi-coating probe.Each coke Away from field angle ω can be determined by following formula: tan ω=η/f ' (half image height that η is image planes).In this way, the maximum of each layer and 0.7 The angle of the outgoing beam of visual field chief ray just can determine.
For the ease of manually carrying out seeing that picture, the projection imaging component 10 are projection curtain or projection wall.
Specific embodiment (two):
A kind of MTF detection method of zoom lens image quality, it is characterised in that: method includes the following steps:
1. the body tube 11 of zoom lens 1 is mounted in camera lens adapted seat 6, then the driving of sliding driving device 4 sliding Platform 3 is to drive zoom lens 1 to enter detection station;
2. Zoom regulating mechanism 7 drives Zoom lens barrel 12 to rotate relative to body tube 11 to be adjusted to the focal length for needing to measure;
3. focus adjusting mechanism 8 drives focusing barrel 13 to rotate the pattern so that in reticule assembly 9 relative to body tube 11 Clearly image is formed in projection imaging component 10 after zoom lens 1;
4. according to step, 3. the middle image formed calculates zoom lens 1 in the mtf value of the coke section;
5. repeat step 2.~4., until the mtf value of all focal lengths that need to be measured all has measured;
6. the mtf value that each focometry goes out is compared with the standard value of setting respectively, show that zoom lens 1 is imaged The grade of quality;
7. sliding platform 3 resets, zoom lens 1 is taken out, it is quasi- to be packed into the measurement that another zoom lens 1 carries out next time It is standby.
The camera lens of different size before detection, coke after flange need to be first demarcated with the standard lens of this specification, that is, is determined The position of graticle.
Above-mentioned specific embodiment is only explained in detail technical solution of the present invention, the present invention not only only office It is limited to above-described embodiment, all any improvement or replacement according to the principle of the invention should all be within protection scope of the present invention.

Claims (10)

1. a kind of MTF detection device of zoom lens image quality, the zoom lens (1) includes body tube (11), rotation company Be connected on body tube (11) for drive zoom lens (1) carry out zoom Zoom lens barrel (12) and be rotationally connected with primary mirror The focusing barrel (13) for driving zoom lens (1) to be focused after zooming to specified focal length on cylinder (11), feature Be: the MTF detection device includes rack (2), the detection station being set on rack (2), is set on rack (2) and position Sliding platform (3), the connection for entering or leaving detection station for driving zoom lens (1) mobile in detection station side The sliding driving device for driving sliding platform (3) opposite rack (2) to slide between rack (2) and sliding platform (3) (4), the installs case (5) that is fixedly arranged on sliding platform (3), be fixedly arranged on installs case (5) upper surface for placing zoom lens (1) and the camera lens adapted seat (6) of body tube (11) position, the use being set between installs case (5) and Zoom lens barrel (12) are fixed To carry out the Zoom regulating mechanism (7) of zoom and rack is set to relative to body tube (11) rotation in drive Zoom lens barrel (12) (2) on and it is located at the focusing for being used to that focusing barrel (13) to be driven to be rotated relative to body tube (11) to be focused in detection station Regulating mechanism (8), the MTF detection device further include the optical axis direction for being set in installs case (5) and being located at zoom lens (1) On for for zoom lens (1) provide image test chart reticule assembly (9) and be set to the detection station other side Projection imaging component (10).
2. the MTF detection device of zoom lens image quality according to claim 1, it is characterised in that: the zoom tune Section mechanism (7) include be rotationally connected with zoom turntable (71) on reticule assembly (9) and with the axis coaxle of adapted seat (6), The zoom drive motor (72) that is fixedly arranged in installs case (5), be coaxially fixedly arranged on zoom drive motor (72) output shaft and with change Burnt turntable (71) periphery be meshed transmission Zoom driving gear (73) and be set to zoom turntable (71) in the radial direction Zoom clamping cylinder (74), zoom clamping cylinder (74) cylinder body end be fixedly arranged on zoom turntable (71) and jaw end clamp In Zoom lens barrel (12) periphery.
3. the MTF detection device of zoom lens image quality according to claim 1, it is characterised in that: the focusing is adjusted Section mechanism (8) is including being fixedly arranged on the mounting plate (81) on rack (2) and being located in detection station, being rotationally connected with mounting plate (81) It is upper and with the focusing turntable (82) of the axis coaxle of adapted seat (6), the focusing driving motor (83) being fixedly arranged on mounting plate (81), It is coaxially fixedly arranged on focusing driving motor (83) output shaft and is meshed the focusing sliding tooth of transmission with turntable (82) periphery is focused Wheel (84) and the clamping element (85) for being used to clamp focusing barrel (13) being set in focusing turntable (82), the mounting plate (81) and in focusing turntable (82) avoid holes for protruding into for zoom lens (1) are equipped with.
4. the MTF detection device of zoom lens image quality according to claim 3, it is characterised in that: the clamping element (85) include two be fixedly arranged in parallel the sliding rails (851) focused on turntable (82), two pieces be slidably connected on sliding rail (851) and energy Opposite sliding is with the gripping block (852) of clamp or release focusing barrel (13) and is connected between two pieces of gripping blocks (852) For driving the focusing clamping cylinder (853) of the opposite sliding of two pieces of gripping blocks (852), the inner end of two pieces of gripping blocks (852) is all provided with There is the arc to match with focusing barrel (13) periphery to clamp face (8521), the clamping element (85) further includes being connected to two pieces of folders Buffer spring (854) between tight block (852) and be fixedly arranged on mounting plate (81) for limiting two pieces of gripping blocks (852) outside The stop screw (855) of end position.
5. the MTF detection device of zoom lens image quality according to claim 1, it is characterised in that: the graticle Component (9) include graduation plate module (91) and be connected between rack (2) and graduation plate module (91) for driving graduation Plate module (91) the XY axis slide unit (92) and Z axis slide unit (93) mobile relative to zoom lens (1).
6. the MTF detection device of zoom lens image quality according to claim 1, it is characterised in that: the sliding is flat Platform (3) is slidably connected on rack (2) in T-shaped and " T " word lower end, and the sliding driving device (4) includes being fixedly arranged on machine On frame (2) and the guide rod (41) parallel with the glide direction of sliding platform (3), it is slidably connected on guide rod (41) and one It holds the pushing block (42) being fixedly connected with " T " the word lower end of sliding platform (3), be connected between rack (3) and pushing block (42) Ball-screw (43) and be connected between rack (2) and ball-screw (43) for drive ball-screw (43) rotate It slides driving motor (44).
7. the MTF detection device of zoom lens image quality according to claim 1, it is characterised in that: camera lens adapted seat It (6) include the mounting base (61) being fixedly arranged on installs case (5) upper surface, the mounting base (61) is equipped with diameter and body tube (11) side wall of the installation circular hole (611) that outer diameter matches, installation circular hole (611) is equipped with notch, the camera lens adapted seat It (6) further include protruding into notch to carry out the fixed compression bar (62) of press to body tube (11) and be connected to installs case (5) upper surface It is used to drive compression bar (62) to carry out the fixed press cylinder (63) of press to body tube (11) between compression bar (62).
8. the MTF detection device of zoom lens image quality described in any one of -7 according to claim 1, it is characterised in that: The projection imaging component (10) is MTF analyzer, and the MTF analyzer includes that multiple measurements according to zoom lens (1) are wanted The control seeking the digital camera for the object space side for being distributed in zoom lens (1) and being connected respectively with each digital camera The angle of device, each digital camera and zoom lens (1) optical axis is less than or equal to the half at zoom lens (1) maximum field of view angle And the object space principal point of optical axis alignment zoom lens (1) of each digital camera, the controller are also filled with sliding driving respectively Set (4), Zoom regulating mechanism (7) is connected with focus adjusting mechanism (8).
9. the MTF detection device of zoom lens image quality described in any one of -7 according to claim 1, it is characterised in that: The projection imaging component (10) is projection curtain or projection wall.
10. a kind of MTF detection device using zoom lens image quality described in claim 1 carries out zoom lens into image quality The method for measuring detection, it is characterised in that: method includes the following steps:
1. the body tube (11) of zoom lens (1) is mounted in camera lens adapted seat (6), then sliding driving device (4) is driven Sliding platform (3) is to drive zoom lens (1) to enter detection station;
2. Zoom regulating mechanism (7) drives Zoom lens barrel (12) to rotate relative to body tube (11) to be adjusted to the focal length for needing to measure;
3. focus adjusting mechanism (8) drives focusing barrel (13) to rotate relative to body tube (11) so that in reticule assembly (9) Pattern forms clearly image after zoom lens (1) in projection imaging component (10);
4. according to step, 3. the middle image formed calculates zoom lens (1) in the mtf value of the coke section;
5. repeat step 2.~4., until the mtf value of all focal lengths that need to be measured all has measured;
6. the mtf value that each focometry goes out is compared with the standard value of setting respectively, obtain zoom lens (1) at image quality The grade of amount;
7. sliding platform (3) resets, take out zoom lens (1), it is quasi- to be packed into the measurement that another zoom lens (1) carries out next time It is standby.
CN201910434495.1A 2019-05-23 2019-05-23 The MTF detection device and detection method of zoom lens image quality Pending CN110057554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910434495.1A CN110057554A (en) 2019-05-23 2019-05-23 The MTF detection device and detection method of zoom lens image quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910434495.1A CN110057554A (en) 2019-05-23 2019-05-23 The MTF detection device and detection method of zoom lens image quality

Publications (1)

Publication Number Publication Date
CN110057554A true CN110057554A (en) 2019-07-26

Family

ID=67324212

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910434495.1A Pending CN110057554A (en) 2019-05-23 2019-05-23 The MTF detection device and detection method of zoom lens image quality

Country Status (1)

Country Link
CN (1) CN110057554A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111220362A (en) * 2020-01-19 2020-06-02 Oppo广东移动通信有限公司 Test method and test system
CN111399158A (en) * 2020-06-03 2020-07-10 宁波丞达精机有限公司 Optical lens AA equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111220362A (en) * 2020-01-19 2020-06-02 Oppo广东移动通信有限公司 Test method and test system
CN111399158A (en) * 2020-06-03 2020-07-10 宁波丞达精机有限公司 Optical lens AA equipment

Similar Documents

Publication Publication Date Title
CN110057554A (en) The MTF detection device and detection method of zoom lens image quality
WO2017162201A1 (en) Inclination measurement system for photographing module and measurement method
CN103024254B (en) A kind of imaging Method of Adjustment of television cameras
CN102156037B (en) Optical detection device and detection method
CN104122077A (en) Method and device for measuring modulation transfer functions of optic lenses through infinite conjugated light paths
CN201844916U (en) Optical transfer function measuring device
US4697075A (en) X-ray imaging system calibration using projection means
CN110849484B (en) Extinction ratio testing device and method for infrared polarization camera with split-focus plane
CN209707074U (en) The MTF detection device of zoom lens image quality
US4110046A (en) Optical apparatus and method
US6179448B1 (en) Automated light tuner
US20140320672A1 (en) Method and Apparatus for Measuring Flange Back Focus and Calibrating Track Length Scales of Photographic Objective Lenses
CN105662314A (en) Endoscope detection system
US5999251A (en) Lens testing apparatus and a lens adjusting apparatus
US6346981B1 (en) Lens testing device
JP5126648B2 (en) Lens unit alignment device
KR20150114199A (en) Defect inspecting apparatus for ir filter with automatic focus control unit
CN111060294A (en) Comprehensive test platform for fluorescence microscope objective
CN212646048U (en) MTF detection device
CN211652030U (en) Relative aperture measuring device for photographic objective lens
JP2012093116A (en) Lens checking apparatus and chart plate
CN106768872B (en) A kind of automatic focimeter
CN213146194U (en) Light source with variable light spot diameter
CN210243143U (en) General calibration mirror calibrating device
CN213632617U (en) Device for realizing high precision of optical transfer function measuring instrument

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