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 PDFInfo
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- 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
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- 238000001514 detection method Methods 0.000 title claims abstract description 80
- 238000003384 imaging method Methods 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 11
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- 238000009434 installation Methods 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012372 quality testing Methods 0.000 abstract description 3
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- 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
- G01M11/0207—Details of measuring devices
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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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
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.
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| CN111399158A (en) * | 2020-06-03 | 2020-07-10 | 宁波丞达精机有限公司 | Optical lens AA equipment |
| CN113596435A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Lens detection device |
| 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 |
| CN114911066A (en) * | 2022-07-13 | 2022-08-16 | 广东省傲来科技有限公司 | Method, device and equipment for assembling lens and display screen and storage medium |
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