CN109633860A - Automatically adjust method, lens position adjusting device and the projector of lens location - Google Patents
Automatically adjust method, lens position adjusting device and the projector of lens location Download PDFInfo
- Publication number
- CN109633860A CN109633860A CN201910059990.9A CN201910059990A CN109633860A CN 109633860 A CN109633860 A CN 109633860A CN 201910059990 A CN201910059990 A CN 201910059990A CN 109633860 A CN109633860 A CN 109633860A
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- China
- Prior art keywords
- camera lens
- displacement
- clarity
- lens
- reference position
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Classifications
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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
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
- G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Lens Barrels (AREA)
Abstract
The present invention is originally related to optical device and its focusing method, and in particular to automatically adjusts method, lens position adjusting device and the projector of lens location.The method that the present invention automatically adjusts lens location includes: step S1: the camera lens is moved along a straight line from first position to the second position, and clarity of the camera lens to reference position for the lens imaging under each displacement is calculated according to scheduled displacement accuracy during the movement camera lens, record the corresponding relationship of the displacement and the clarity；Step S2: according to the corresponding relationship of the displacement of record and the clarity, determine that the camera lens is denoted as best displacement to the displacement of the reference position when clarity highest；Step S3: the camera lens is moved along a straight line from the second position to being at the position being most preferably displaced to the reference position.The inaccurate problem of focusing for being able to solve the backlash phenomenon due to driving device gear using the present invention and generating.
Description
Technical field
The present invention relates to optical device and its focusing methods, and in particular to automatically adjusts method, the camera lens position of lens location
Set regulating device and projector.
Background technique
Existing projector focus control is in fixed place sensors as fixed focusing datum mark.Control master
Strip moves motor rotation with moving lens.When camera lens is mobile, the step number of motor rotation can feed back control mainboard.Generally for
Determine whether camera lens shows highest clarity on object plane, need to pass through camera lens and be more than optimal imaging point, at this time due to
The step number of motor rotation when control mainboard record has optimal imaging, can calculate in conjunction with the step number of current location motor rotation
The step number that camera lens should be made to turn round.
But since driving device is gear structure, there are backlash phenomenon when revolution, i.e., motor has turned round a step but actually
Camera lens does not move but.So if directly according to calculated revolution step number, transposable lens, camera lens would not be returned to most preferably back and forth
Imaging point.
Therefore a kind of method is needed, is able to solve the backlash phenomenon due to driving device gear and the focusing that generates is inaccurate
Problem.
Summary of the invention
In view of this, the application provides a kind of method for automatically adjusting lens location, comprising:
Step S1: the camera lens is moved along a straight line from first position to the second position, and in the movement camera lens
In the process according to scheduled displacement accuracy calculate the camera lens to reference position be each displacement under the lens imaging it is clear
Degree records the corresponding relationship of the displacement and the clarity；
Step S2: according to the corresponding relationship of the displacement of record and the clarity, when determining clarity highest described in
Camera lens is denoted as best displacement to the displacement of the reference position；
Step S3: the camera lens is moved along a straight line to the reference position from the second position and is displaced to be best
Position at.
Optionally, the reference position is a position in camera lens mobile range.
Optionally, position corresponding to highest clarity when the reference position is preceding Primary regulation camera lens.
Optionally, the reference position is an endpoint of camera lens mobile range.
Optionally, the first position is the reference position.
Optionally, the first position is the current location of the camera lens.
Optionally, the second position is the endpoint of camera lens mobile range.
Optionally, the second position is the clarity as the movement of the camera lens is opened after living through rising again
Corresponding position when beginning to decline.
Correspondingly, the present invention also provides a kind of lens position adjusting device, the regulating device includes drive module, displacement
Measurement module, sharpness computation module, logging modle and control module,
The drive module is for moving the camera lens；
Institute's displacement measurement module is for measuring the displacement of the camera lens to reference position；
The sharpness computation module is used to calculate the clarity of the lens imaging；
The logging modle is used to record the corresponding relationship between the clarity and the displacement；
The control module is used for
It controls the drive module to move along a straight line the camera lens to the second position from first position, in mobile mistake
Institute's displacement measurement module is controlled in journey and measures the displacement of the camera lens to the reference position, according to preset displacement accuracy control
It is the clarity under each displacement that camera lens described in the sharpness computation, which is made, to the reference position, controls the logging modle note
Record the corresponding relationship between the displacement and the clarity；
After the camera lens is moved into the second position, the control module is according to the displacement of record and described clear
Corresponding relationship between degree determines that the camera lens described when clarity highest to the displacement of the reference position, is denoted as best displacement；
Control the mobile camera lens of the drive module make the camera lens moved along a straight line from the second position to
It is at the position being most preferably displaced to the reference position.
Correspondingly, the present invention also provides a kind of projectors, including camera lens and aforementioned any lens position adjusting device.
The application compared with prior art, be able to solve the backlash phenomenon due to driving device gear and the focusing that generates not
Quasi- problem.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of embodiment of the method for automatic adjustment lens location of the invention.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying example, the present invention is described in further detail.
The present invention provides a kind of lens position adjusting device.The lens position adjusting device includes drive module, displacement
Measurement module, sharpness computation module, logging modle and control module.
The drive module is for moving the camera lens；
Institute's displacement measurement module is for measuring the displacement of the camera lens to reference position；
The sharpness computation module is used to calculate the clarity of the lens imaging；
The logging modle is used to record the corresponding relationship between the clarity and the displacement；
The control module is used for
It controls the drive module to move along a straight line the camera lens to the second position from first position, in mobile mistake
Institute's displacement measurement module is controlled in journey and measures the displacement of the camera lens to the reference position, according to preset displacement accuracy control
It is the clarity under each displacement that camera lens described in the sharpness computation, which is made, to the reference position, controls the logging modle note
Record the corresponding relationship between the displacement and the clarity；
After the camera lens is moved into the second position, the control module is according to the displacement of record and described clear
Corresponding relationship between degree determines that the camera lens described when clarity highest to the displacement of the reference position, is denoted as best displacement；
Control the mobile camera lens of the drive module make the camera lens moved along a straight line from the second position to
It is at the position being most preferably displaced to the reference position.
In this embodiment, the displacement of the camera lens to reference position is measured using displacement measurement module, then exist
When turning round camera lens, which measures displacement using displacement measurement module to ensure that camera lens is turned back to best displacement.It should
Embodiment is effectively prevented by recording the step of camera lens replaces record motor rotation to the displacement of reference position due to electricity
Machine dallies and bring error.Therefore, which may be implemented more accurately to focus.
In one embodiment, preset displacement accuracy keeps the same numerical value in entire camera lens mobile range,
Such as a clarity is calculated in the every mobile 1mm of camera lens mobile range inner lens, that is to say, that calculate by displacement accuracy of 1mm
Clarity.
In another embodiment, preset displacement accuracy is the variation with clarity and changes that clarity is got over
Displacement accuracy is lower when low.Such as when clarity is lower than preset first threshold, every the first displacement accuracy, such as 2mm, meter
A clarity is calculated, when clarity, which is higher than first threshold, is lower than second threshold, every second displacement precision, such as 1mm, is calculated
Clarity etc..Setting in this way may be implemented faster to focus.
In one embodiment, the reference position is an endpoint of camera lens mobile range.Preferably
In, camera lens is always located in the same side of reference position, therefore the benefit being arranged in this way is, only needs to pay close attention to position when measuring displacement
The size of shifting, the direction without recording displacement.
In another embodiment, position corresponding to highest clarity when the reference position is preceding Primary regulation camera lens
It sets.In this embodiment, camera lens may be mobile in the two sides of reference position, needs not only to need to record the size of displacement at this time
Also need to record the direction of displacement.In this embodiment, displacement essence can be set according to the distance of camera lens to reference position
Degree.It should be noted that above description is not intended to limit reference position, reference position can be in any suitable position
Set, for example, positioned at camera lens can with any point in range, even on camera lens mobile range outside, as long as mirror can be uniquely determined
The position of head.
In one embodiment, the first position and the reference position are all an end of camera lens mobile range
Point.It means that per secondary Shi Douxian being adjusted to camera lens camera lens being returned to preset endpoint, due to known reference position
Being is being in the endpoint, therefore displacement at this time should be 0, if being not zero, can be calibrated.
In another embodiment, the first position is the current location of the camera lens.Setting in this way,
When camera adjusting starts, without picture aforementioned embodiments elder generation moving lens to fixed position, therefore it can be responded faster.
In one embodiment, the second position is an endpoint of the camera lens mobile range, i.e. camera lens is wanted
Being moved to endpoint can just turn round.
In another embodiment, the second position is the clarity as the movement of the camera lens is living through
Corresponding position when being begun to decline after rising again.I.e. it may determine that having already been through after clarity, which rises, to be declined again
Highest clarity, therefore endpoint need not be moved to and just turned round, therefore entire regulating time can be shortened.
Correspondingly, the present invention also provides a kind of projector, which includes camera lens and aforementioned any lens location tune
Regulating device.
Referring to Fig.1, correspondingly, the present invention provides a kind of method for automatically adjusting lens location, comprising:
Step S1: the camera lens is moved along a straight line from first position to the second position, and in the movement camera lens
Calculating the camera lens to reference position according to scheduled displacement accuracy in the process is the clarity under each displacement, records institute's rheme
Move the corresponding relationship with the clarity；
Step S2: according to the corresponding relationship of the displacement of record and the clarity, when determining clarity highest described in
Camera lens is denoted as best displacement to the displacement of the reference position；
Step S3: the camera lens is moved along a straight line to the reference position from the second position and is displaced to be best
Position at.
Optionally, the reference position is a position in camera lens mobile range.
Optionally, the reference position is an endpoint of camera lens mobile range.
Optionally, position corresponding to highest clarity when the reference position is preceding Primary regulation camera lens.
Optionally, the first position is the current location of the camera lens.
Optionally, the first position is the reference position.
Optionally, the second position is the endpoint of camera lens mobile range.
Optionally, the second position is the clarity as the movement of the camera lens is opened after living through rising again
Corresponding position when beginning to decline.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (10)
1. a kind of method for automatically adjusting lens location characterized by comprising
Step S1: the camera lens is moved along a straight line from first position to the second position, and in the process of the movement camera lens
According to scheduled displacement accuracy calculate the camera lens to reference position be each displacement under the lens imaging clarity, note
Record the corresponding relationship of the displacement and the clarity；
Step S2: according to the corresponding relationship of the displacement of record and the clarity, camera lens when clarity highest is determined
To the displacement of the reference position, it is denoted as best displacement；
Step S3: the camera lens is moved along a straight line from the second position to being the position being most preferably displaced to the reference position
Set place.
2. the method according to claim 1, wherein the reference position is one in camera lens mobile range
Position.
3. according to the method described in claim 2, it is characterized in that, most high definition when the reference position is preceding Primary regulation camera lens
Position corresponding to clear degree.
4. according to the method described in claim 2, it is characterized in that, the reference position is an end of camera lens mobile range
Point.
5. according to the method described in claim 4, it is characterized in that, the first position is an end of camera lens mobile range
Point.
6. the method according to claim 1, wherein the first position is the current location of the camera lens.
7. the method according to claim 1, wherein the second position is an end of camera lens mobile range
Point.
8. the method according to claim 1, wherein the second position is the clarity with the camera lens
Movement live through rise after and while beginning to decline corresponding position.
9. a kind of lens position adjusting device, which is characterized in that the regulating device include drive module, displacement measurement module,
Sharpness computation module, logging modle and control module,
The drive module is for moving the camera lens；
Institute's displacement measurement module is for measuring the displacement of the camera lens to reference position；
The sharpness computation module is used to calculate the clarity of the lens imaging；
The logging modle is used to record the corresponding relationship between the clarity and the displacement；
The control module is used for
It controls the drive module to move along a straight line the camera lens to the second position from first position, in the process of moving
Control institute's displacement measurement module measures the displacement of the camera lens to the reference position, controls institute according to preset displacement accuracy
It is the clarity under each displacement that camera lens described in sharpness computation, which is stated, to the reference position, controls logging modle record institute
Rheme moves the corresponding relationship between the clarity；
After the camera lens is moved into the second position, the control module according to the displacement of record and the clarity it
Between corresponding relationship, determine that described when clarity highest camera lens to the displacement of the reference position, is denoted as best displacement；
Controlling the mobile camera lens of the drive module moves along a straight line the camera lens from the second position to institute
Stating reference position is at the position being most preferably displaced.
10. a kind of projector, which is characterized in that including camera lens and lens position adjusting device as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059990.9A CN109633860A (en) | 2019-01-22 | 2019-01-22 | Automatically adjust method, lens position adjusting device and the projector of lens location |
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| CN201910059990.9A CN109633860A (en) | 2019-01-22 | 2019-01-22 | Automatically adjust method, lens position adjusting device and the projector of lens location |
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Cited By (4)
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| CN110519580A (en) * | 2019-10-11 | 2019-11-29 | 成都极米科技股份有限公司 | A kind of projector automatic focusing method, device, equipment and readable storage medium storing program for executing |
| CN112437282A (en) * | 2020-08-18 | 2021-03-02 | 深圳市安华光电技术有限公司 | Image definition adjusting method and device and DLP projector |
| CN112887691A (en) * | 2021-02-20 | 2021-06-01 | 歌尔光学科技有限公司 | Projector focusing method, system and computer readable storage medium |
| CN114518630A (en) * | 2020-11-19 | 2022-05-20 | 成都极米科技股份有限公司 | Backlash elimination method and device, electronic equipment and computer-readable storage medium |
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Address after: 610041 Tianfu Software Park Area A, 1129 Century City Road, Chengdu High-tech Zone, Sichuan Province Applicant after: Chengdu Jimi Technology Co., Ltd. Address before: 610041 Tianfu Software Park Area A, 1129 Century City Road, Chengdu High-tech Zone, Sichuan Province Applicant before: CHENGDU XGIMI TECHNOLOGY CO., LTD. |
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Application publication date: 20190416 |