CN108107648A - Filter plate switching device, imaging device and position control method - Google Patents
Filter plate switching device, imaging device and position control method Download PDFInfo
- Publication number
- CN108107648A CN108107648A CN201810096569.0A CN201810096569A CN108107648A CN 108107648 A CN108107648 A CN 108107648A CN 201810096569 A CN201810096569 A CN 201810096569A CN 108107648 A CN108107648 A CN 108107648A
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- China
- Prior art keywords
- installation unit
- installation
- switching device
- filter plate
- plate switching
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Classifications
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- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Blocking Light For Cameras (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
Present invention is disclosed a kind of filter plate switching device and there is its imaging device, including：Housing, housing be equipped with for incident light by loophole；Installation unit, it is contained in housing and configures several installation positions, at least part installation position configures optical filter, the axle center of installation unit of the installation position where it is uniformly distributed circumferentially, the center of each installation position and the axle center of the installation unit where it are equidistant, installation unit is at least two, and is uniformly distributed circumferentially around the axis of loophole；Several driving mechanisms are corresponded with installation unit and rotated with respectively driving each installation unit around respective axle center；The distance in the axle center of the installation unit where the center to its of installation position is equal to the axis of loophole to the distance in each installation unit axle center.Control method is accurately positioned present invention further teaches the filter plate switching device.
Description
Technical field
The invention belongs to optical imaging apparatus technical fields, and in particular to imaging device and its filter plate switching device.
Background technology
Highly sensitive photoelectronic imaging device, for example, CCD (Charge-coupled Device, charge coupled cell) with
And CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor), it is black and white
Monochrome can not shoot colored picture, it is necessary to different colours optical filter be placed before photoelectronic imaging device, to obtain different face
Color.In order to facilitate using optical filter, then filter plate switching device arises.
Electronic filter plate switching device is mainly spiraled by the mounting disc of one chip optical filter and a driving optical filter installation
Motor and the control circuit composition turned.Optical filter mounting disc is generally fixed by the way of single swivel bearing.One chip filters
The optical filter of piece mounting disc is mounted on the edge of disk, not in core position.Cause existing electronic filter plate switching device
Center and light path center it is not coaxial.So electronic filter plate switching device is asymmetrical in light path, such structure
It can not be used on prime focus imaging device.Single bearing rotary, when causing optical filter installation disc spins due to the clearance of bearing
Dancing is had, optical filter installs disc spins not in same level.
Moreover, optical filter is higher to the required precision of position after conversion, if deviation very conference shuts out the light, influence
Picture quality, it is therefore desirable to which one kind is to the pinpoint method of electronic filter plate switching device.Existing electronic optical filter converting means
It is generally positioned in putting using infrared opposed sensor or Hall magnetic induction sensor.During using infrared opposed sensor,
The transmitting of sensor and receiving circuit will be mounted on two faces of optical filter mounting disc, the requirement to mounting structure and installation accuracy
It is all higher.During using Hall magnetic induction sensor, the surface smear magnetic material in optical filter mounting disc position location is understood,
Increase technique during production, and Hall magnetic induction sensor is expensive in itself, makes cost.
The content of the invention
It is an object of the invention to provide a kind of imaging devices with filter plate switching device, can overcome above-mentioned lack
It falls into.
For achieving the above object, the present invention provides a kind of filter plate switching device, including：
Housing, housing be equipped with for incident light by loophole；
Installation unit, is contained in housing and several installation positions of configuration, at least part installation position configure optical filter, installation position
The axle center of installation unit where it is uniformly distributed circumferentially, the center of each installation position and the axis of the installation unit where it
The heart is equidistant, and installation unit is at least two, and is uniformly distributed circumferentially around the axis of loophole；
Several driving mechanisms are corresponded with installation unit and revolved with respectively driving each installation unit around respective axle center
Turn；
The axis that the distance in the axle center of the installation unit where the center to its of installation position is equal to loophole is single to each installation
The distance in first axle center.
As being further improved for an embodiment of the present invention, installation unit is located at the plane vertical with the axis of loophole
On.
As being further improved for an embodiment of the present invention, the axle center of each installation unit and the axis of loophole etc.
Away from.
As being further improved for an embodiment of the present invention, each installation unit is parallel.
As being further improved for an embodiment of the present invention, installation unit by the flange flange bearing worked in coordination and
Plain thrust bearing and rotation axis connection.
As being further improved for an embodiment of the present invention, filter plate switching device further includes infrared sensor, infrared
Sensor 80 can emit infrared light and detect its reflected light, and installation unit sets several align members, align member and installation
Position corresponds, during the driven rotation of installation unit, align member by infrared sensor investigative range and make the strong of reflected light
Degree changes.
As being further improved for an embodiment of the present invention, align member is location hole.
As being further improved for an embodiment of the present invention, filter plate switching device further includes controller, is configured to
The position of installation position is judged according to the variation of intensity of reflected light.
To achieve the above object, an embodiment of the present invention provides a kind of imaging device, including photo-electric conversion element, rotation
Axis and above-mentioned filter plate switching device, installation unit are connected in rotation axis, and photo-electric conversion element will be by optical filter and incidence
Light be converted into electric signal.
To achieve the above object, an embodiment of the present invention provides a kind of position control method of filter plate switching device,
Including：
Radius of the detection per a positioning hole, and store radius distance value；
Installation unit is controlled to be rotated around its axle center；
The infrared external reflection variation of light intensity that record infrared sensor detects；
By infrared external reflection variation of light intensity compared with a default threshold value, when more than threshold value, it is judged as positioning
The edge in hole；
Control installation unit continues to rotate the corresponding radius distance of the location hole.
Compared with prior art, the present invention solves imaging device using after electronic filter plate switching device, due to not right
The problem of title causes light source to be blocked, and ensure that the stability of optical filter installation unit rotation, position error is eliminated, is improved
Positioning accuracy.
Description of the drawings
Fig. 1 is the structure diagram of one embodiment of filter plate switching device of the present invention；
Fig. 2 is the internal structure top view of one embodiment of filter plate switching device of the present invention；
Fig. 3 is the internal structure schematic diagram of one embodiment of filter plate switching device of the present invention；
Fig. 4 is the sectional view of one embodiment of installation unit；
Fig. 5 is the side view of installation unit and infrared sensor fit structure；
Fig. 6 is the reflected light signal before filtering；
Fig. 7 is through the filtered reflected light signal of digital moving average filter.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
The present invention is not limited, structure that those of ordinary skill in the art are made according to these embodiments, method or functionally
Conversion is all contained in protection scope of the present invention.
In the present invention, term " incident light " refers to the light for inciding into imaging device lens barrel portion, and the advance route of incident light claims
For " input path ".The word of described expression position and direction in the present invention, be using incident light source as reference, it is close enter
Before the one end for penetrating light source is, after one end away from incident light source is.Described imaging device includes but not limited in the present invention
Astronomical telescope.
Join Fig. 1, filter plate switching device includes housing 10, and housing 10 is enclosed an accommodating chamber.10 front surface of housing and
Rear surface respectively opens up the corresponding loophole 20 in a position, and filter plate switching device is passed through for incident light.
Join Fig. 2 and Fig. 3,10 content of housing receives installation unit.Installation unit is located at vertical with the axis of loophole 20 put down
On face, with discoidal pedestal 31, the installation position 32 of several optical filters is set thereon.The installation position 32 of same installation unit
In being generally aligned in the same plane.Fig. 2 and Fig. 3 is exemplary to show that four go out installation position 32.When installing optical filter, each installation unit stays a peace
Position 32 is filled as sky, remaining installation position 32 configures optical filter.
Installation unit has axle center 33, can be rotated around axle center 33.Installation position 32 is uniformly distributed circumferentially around axle center 33, often
The center of one installation position 32 is equal to 33 distance of axle center.Also, the center of installation position 32 is to the distance in axle center 33, with loophole
The distance in 20 axis to installation unit axle center 33 is equal.In this way, when installation unit is rotated around axle center 33, each installation position 32
It is possible that realization is coaxial with loophole 20, pass through for incident light.
Multiple installation units are accommodated simultaneously in housing 10, can realize that the rotation of a variety of different optical filters uses.Fig. 2 and figure
3 illustrate two installation units.Axis of each installation unit around loophole 20 is uniformly distributed circumferentially, each installation unit
Axle center 33 and the axis of loophole 20 it is equidistant.Each installation unit is parallel non-coplanar, can around respective axle center 33 perpendicular to
The plane internal rotation of the axis of loophole 20, does not interfere mutually.
Each installation unit partially overlaps on the direction parallel to 20 axis of loophole.For example, work as certain of an installation unit
One optical filter rotate to loophole 20 it is coaxial when, controller pass through driving mechanism 40 control other installation units blank install
32 rotation of position is extremely coaxial with loophole 20, realizes that single optical filter filters.Similarly, it can also realize that multiple optical filter overlappings filter.
Join Fig. 2, each installation unit is connected with a driving mechanism 40.Illustratively, driving mechanism 40 is stepper motor.
Driving mechanism 40 drives installation unit to rotate a certain angle around its axle center 33, realizes that specific installation position 32 is same with loophole 20
Axis.
Join Fig. 4, the axle center 33 of installation unit sets the flange flange bearing 50 worked in coordination and plain thrust bearing 50, leads to
This group of bearing is crossed to be seated in the rotation axis of imaging device.Flange flange bearing 50 is conveniently adjusted the axial play of bearing
Gap is advantageously implemented the axially position of installation unit, avoids installation unit that axial displacement or swing occurs when rotating.Plane pushes away
Power bearing 50 is then maintaining the stability of installation unit in axial plane, in rotary flat when avoiding the installation unit from rotating
Eccentric swing occurs in face.
Join Fig. 3, each installation unit sets several align members.Align member coordinates with detection device, can be detected
Device detects.Align member is corresponded with installation position 32, and quantity is identical, and position is engaged.Illustratively, align member
To be arranged at the location hole 70 of pedestal 31, pass through for detection light.When 70 diameter of location hole is too small, caused by light intensity variation it is micro-
It is weak, device detection can not be detected.Preferably, a diameter of 3mm of location hole 70, to realize preferable locating effect.
Controller is electrically connected with driving mechanism 40 and detection device, can receive the photoelectricity that detection device detects
Signal is simultaneously converted into position signal, sends instruct to driving mechanism 40 accordingly.
Join Fig. 5, each installation unit is corresponding with a detection device.Detection device is arranged at the one side of installation unit, and
Do not stop input path.Detection device is reflection infrared sensor 80, can send infrared light, and detect be reflected back it is infrared
The intensity of light.The infrared light that infrared sensor 80 is sent, when running into location hole 70, the infrared light weakened that is reflected back.Control
Device gathers the change information of infrared light power, the position with 70 corresponding installation position 32 of location hole is judged whereby, to indicate to walk
The angle of stepper motor driving installation unit rotation.
In a further embodiment of this invention, the side that a kind of movement to filter plate switching device is accurately controlled is provided
Method, it is to ensure in use, coaxial positioned at the installation position of input path 32 and loophole 20.
The filter plate switching device of the present invention is installed on astronomical telescope or other prime focus imaging devices, makes light transmission
Hole 20 and the aperture of imaging device are coaxial.Incident light incides into aperture through the optical filter in loophole 20, and in imaged equipment
Photo-electric conversion element be converted to electric signal.
In system initialization, the distance at the automatic edge for detecting the every a positioning hole 70 of filter plate switching device to center,
And the parameter is stored in controller.Since the machining accuracy of location hole 70 is there are tolerance, the edge per a positioning hole 70 arrives it
The distance at center all has differences, which can eliminate the inconsistent caused error in 70 aperture of location hole.
Further, when installation unit rotates, the edge of location hole 70 is positioned by detection device.Due to fixed
The central light strength in position hole 70 varies less, it is difficult to detect；Even if detecting center, the closing of motor can not be kept away there is also delay
Generate error with exempting from.Since the intensity of reflected light of 70 edge of location hole changes maximum, and there is certain carry at edge far from center
Preceding amount provides time enough to close motor, therefore this method is accurately positioned by detecting 70 edge of location hole to realize.
Specifically, controller by infrared external reflection variation of light intensity compared with a default threshold value, when more than default
During threshold value, it is determined as 70 edge of location hole.It is known, control since the radius of location hole 70 is corrected in abovementioned steps
Stepper motor is further continued for stopping after running the radius distance, so that it may so that corresponding installation position 32 is in the position coaxial with loophole 20
Stop motion is put, completes to be accurately positioned, eliminates influence of the location hole 70 to positioning accuracy.
If the 70 corresponding installation position 32 of location hole is not required to the purpose installation position 32 of conversion, it is infrared anti-to ignore this
Variation of light intensity is penetrated, stepper motor continues to run with, and detection device continues to detect infrared external reflection variation of light intensity
In the signal of infrared external reflection intensity variation, exist and generated due to installation unit rotates or 31 surface of pedestal is uneven
Noise signal.Controller removes noise by signal processing algorithm.
In view of the uneven generated predominantly high frequency low amplitude noise of installation unit rotation or 31 surface of pedestal, and
The operational capability of controller is limited, and noise is eliminated using FIR low pass filter.
Preferably, which is 8 point number moving average filters, but digital moving average filter can cause letter
Number phase error, i.e. time delay, therefore, complete filtering after need orrection phase place error.
Digital moving average filter mathematical model is as follows：
The difference of signal before and after Fig. 6 and Fig. 7 shows to filter and correct.The signal of revised infrared external reflection intensity variation
It can be used to compared with default threshold value.
The installation unit of optical filter is arranged to symmetrical centered on the main shaft of loophole 20 by the present invention, makes optical filter
Conversion equipment can be arranged on the center of imaging device, solve prime focus imaging device and use electronic filter conversion equipment
Afterwards, the problem of due to asymmetry light source being caused to be blocked.Moreover, matching somebody with somebody by flange flange bearing 50 and plain thrust bearing 50
It closes, not only can guarantee horizontal rotation and the radial rotary of installation unit, and the clearance for cleverly solving between bearing is led
Installation unit vibration problems are caused, rotation in any direction can keep stable.Also, pass through reflection infrared sensor 80
And stepper motor cooperation positioning, position error is eliminated, improves positioning accuracy.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
For bright book as an entirety, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can
With the other embodiment of understanding.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
Bright, they are not to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of filter plate switching device, which is characterized in that including：
Housing, the housing be equipped with for incident light by loophole；
Installation unit, is contained in the housing and several installation positions of configuration, at least part installation position configure optical filter, the peace
The axle center for filling installation unit of the position where it is uniformly distributed circumferentially, the center of each installation position and the installation unit where it
Axle center it is equidistant, installation unit is at least two, and is uniformly distributed circumferentially around the axis of the loophole；
Several driving mechanisms are corresponded with installation unit and rotated with respectively driving each installation unit around respective axle center；
The distance in the axle center of the installation unit where the center to its of the installation position is equal to the axis of the loophole to each peace
Fill the distance in unit axle center.
2. filter plate switching device according to claim 1, which is characterized in that installation unit is located at and the loophole
In the vertical plane of axis.
3. filter plate switching device according to claim 1, which is characterized in that the axle center of each installation unit with it is described
The axis of unthreaded hole is equidistant.
4. filter plate switching device according to claim 1, which is characterized in that each installation unit is parallel.
5. filter plate switching device according to claim 1, which is characterized in that the installation unit is by working in coordination
Flange flange bearing and plain thrust bearing and rotation axis connection.
6. filter plate switching device according to claim 1, which is characterized in that infrared sensor is further included, it is described infrared
Sensor 80 can emit infrared light and detect its reflected light, and the installation unit sets several align members, the positioning structure
Part and installation position correspond, and during the driven rotation of the installation unit, the align member passes through the detection model of infrared sensor
It encloses and the intensity of the reflected light is made to change.
7. filter plate switching device according to claim 6, which is characterized in that the align member is location hole.
8. filter plate switching device according to claim 6, which is characterized in that controller is further included, it is and described infrared
Sensor is electrically connected, and the controller is configured to judge according to the variation of the intensity of reflected light position of installation position.
9. a kind of imaging device, it is characterised in that：It is any described including photo-electric conversion element, rotation axis and claim 1-8
Filter plate switching device, the installation unit are connected in the rotation axis, and the photo-electric conversion element will pass through the optical filtering
Piece and incidence light be converted into electric signal.
A kind of 10. position control method of filter plate switching device described in claim 1, which is characterized in that the optical filter
Conversion equipment further includes several location holes, infrared sensor, the location hole be arranged at the installation unit and with installation position one
One corresponds to, and during the driven rotation of the installation unit, investigative range of the location hole Jing Guo infrared sensor simultaneously makes the reflection
The intensity of light changes, the described method includes：
Radius of the detection per a positioning hole, and store the radius distance value；
Installation unit is controlled to be rotated around its axle center；
Record the infrared external reflection variation of light intensity that the infrared sensor detects；
By the infrared external reflection variation of light intensity compared with a default threshold value, when more than the threshold value, it is judged as
The edge of the location hole；
Control installation unit continues to rotate the corresponding radius distance of the location hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096569.0A CN108107648A (en) | 2018-01-31 | 2018-01-31 | Filter plate switching device, imaging device and position control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096569.0A CN108107648A (en) | 2018-01-31 | 2018-01-31 | Filter plate switching device, imaging device and position control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108107648A true CN108107648A (en) | 2018-06-01 |
Family
ID=62221640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810096569.0A Pending CN108107648A (en) | 2018-01-31 | 2018-01-31 | Filter plate switching device, imaging device and position control method |
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| Country | Link |
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| CN (1) | CN108107648A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111258019A (en) * | 2020-03-20 | 2020-06-09 | 宁波翔东智能科技有限公司 | Electric conversion device for optical filter |
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|---|---|---|---|---|
| US4392187A (en) * | 1981-03-02 | 1983-07-05 | Vari-Lite, Ltd. | Computer controlled lighting system having automatically variable position, color, intensity and beam divergence |
| US4800474A (en) * | 1986-05-15 | 1989-01-24 | Vari-Lite, Inc. | Color wheel assembly for lighting equipment |
| US4984143A (en) * | 1988-07-26 | 1991-01-08 | Morpheus Lights, Inc. | Color filter changer |
| JPH0540234A (en) * | 1991-02-15 | 1993-02-19 | Anritsu Corp | Optical attenuator |
| US5515119A (en) * | 1992-05-22 | 1996-05-07 | Panavision International, L.P. | System for varying light intensity such as for use in motion picture photography |
| WO2013146051A1 (en) * | 2012-03-30 | 2013-10-03 | 富士フイルム株式会社 | Filter device, lens apparatus and image pickup apparatus |
| CN203535358U (en) * | 2013-08-15 | 2014-04-09 | 重庆盾银科技有限公司 | Multispectral optical filter switching apparatus used for camera |
| CN205193410U (en) * | 2015-11-20 | 2016-04-27 | 重庆盾银科技有限公司 | A multispectral light filter auto -change over device for image imaging device |
| EP3203296A1 (en) * | 2016-02-02 | 2017-08-09 | Thomas Baader | Centrosymmetric changer for optical elements |
| CN207817385U (en) * | 2018-01-31 | 2018-09-04 | 苏州振旺光电有限公司 | Filter plate switching device and imaging device |
-
2018
- 2018-01-31 CN CN201810096569.0A patent/CN108107648A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392187A (en) * | 1981-03-02 | 1983-07-05 | Vari-Lite, Ltd. | Computer controlled lighting system having automatically variable position, color, intensity and beam divergence |
| US4800474A (en) * | 1986-05-15 | 1989-01-24 | Vari-Lite, Inc. | Color wheel assembly for lighting equipment |
| US4984143A (en) * | 1988-07-26 | 1991-01-08 | Morpheus Lights, Inc. | Color filter changer |
| JPH0540234A (en) * | 1991-02-15 | 1993-02-19 | Anritsu Corp | Optical attenuator |
| US5515119A (en) * | 1992-05-22 | 1996-05-07 | Panavision International, L.P. | System for varying light intensity such as for use in motion picture photography |
| WO2013146051A1 (en) * | 2012-03-30 | 2013-10-03 | 富士フイルム株式会社 | Filter device, lens apparatus and image pickup apparatus |
| CN203535358U (en) * | 2013-08-15 | 2014-04-09 | 重庆盾银科技有限公司 | Multispectral optical filter switching apparatus used for camera |
| CN205193410U (en) * | 2015-11-20 | 2016-04-27 | 重庆盾银科技有限公司 | A multispectral light filter auto -change over device for image imaging device |
| EP3203296A1 (en) * | 2016-02-02 | 2017-08-09 | Thomas Baader | Centrosymmetric changer for optical elements |
| CN207817385U (en) * | 2018-01-31 | 2018-09-04 | 苏州振旺光电有限公司 | Filter plate switching device and imaging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111258019A (en) * | 2020-03-20 | 2020-06-09 | 宁波翔东智能科技有限公司 | Electric conversion device for optical filter |
| CN111258019B (en) * | 2020-03-20 | 2022-04-08 | 宁波翔东智能科技有限公司 | Electric conversion device for optical filter |
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