CN105100581B - Zoom lens apparatus - Google Patents
Zoom lens apparatus Download PDFInfo
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- CN105100581B CN105100581B CN201410220493.XA CN201410220493A CN105100581B CN 105100581 B CN105100581 B CN 105100581B CN 201410220493 A CN201410220493 A CN 201410220493A CN 105100581 B CN105100581 B CN 105100581B
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Abstract
The present invention relates to a kind of Zoom lens apparatus.In Zoom lens apparatus, the focal shift of the lens system as caused by the variation of environment temperature is corrected well with simple correction mechanism.Zoom lens apparatus has focusing system lens and zooming system lens from object side, in turn, the temperature adjustmemt mechanism with preset mechanism, temperature sensor, focusing system lens.Focusing system lens are made of temperature adjustmemt with lens and focusing with lens, temperature adjustmemt is not connect with the driving unit of preset mechanism with lens and is connect with the driving unit of temperature adjustmemt mechanism, and focusing is not connect with the driving unit of temperature adjustmemt mechanism with lens and connect with the driving unit of preset mechanism.The temperature adjustmemt mechanism of focusing system lens moves temperature adjustmemt lens according to environment temperature, and preset mechanism is executing pre- timing, independent of environment temperature is being moved to focusing lens and zooming system lens and carries out the presetting position for setting timing setting.
Description
Technical field
It is presetting the present invention relates to having（preset）The Zoom lens apparatus of mechanism is related to easily correcting due to ring
The Zoom lens apparatus of the focal shift of border temperature.
Background technology
In general, there are focusing system lens with the lens system of the Zoom lens apparatus used in video camera in monitoring
With zooming system lens（Patent document 1, patent document 2）, in actual use, it is widely used from object side by focusing system
It unites the lens systems of lens, zooming system lens, update the system lens, main system lens this 4 groups of compositions.In these lens systems
In, it is therefore used to inhibit the aberration of visible light and near infrared light using near infrared light in the monitoring illumination at night
Fluorite lens or ED lens.
In addition, in monitoring in the Zoom lens apparatus used in video camera, some has following preset mechanism, that is,
Preset the position of focusing system lens for being imaged to defined photography place with defined multiplying power and zoom system
Unite lens position, to this photography place is practical image when, focusing system lens and zooming system lens are located in
Preset position.In the Zoom lens apparatus for having such preset mechanism, as the change prevented due to environment temperature
The method changed and generate focal shift, it is proposed that following method, that is, temperature sensor is set in Zoom lens apparatus, is based on
The temperature of temperature and current time point when presetting setting respectively carries out the position of focusing system lenses and zooming system lens
It corrects（Patent document 1）.
Existing technical literature
Patent document
Patent document 1：Unexamined Patent 11-205655 bulletins；
Patent document 2：Unexamined Patent 11-64713 bulletins.
Invention content
The subject that the invention solves
In the correction mechanism to the variation of environment temperature in previous Zoom lens apparatus, it is necessary to according to environment temperature
Correction amount is found out to position and zooming system lens position on optical axis of the focusing system lenses on optical axis respectively, using pre-
The change in location of the position and zooming system lens of the focusing system lens of regulating mechanism setting, correction mechanism become complicated.
On the other hand, it is an object of the present invention to make it possible in the Zoom lens apparatus for having preset mechanism with single
Pure correction mechanism corrects the focal shift of the lens system as caused by the variation of environment temperature well.
Solution for solving the problem
About the focal shift as caused by variation of ambient temperature in high power zoom lens system device, the present inventor
It is found that the following.That is, finding：
(i) focal position length powerful Zoom lens apparatus in, in long focus side, focusing system lens by ring
Change in shape affects greatly the focusing of entire Zoom lens apparatus caused by the temperature of border, in particular, being filled in zoom lens
It sets in the case of being 4 groups of structures, the change in shape of focusing system lens influences the focusing of entire Zoom lens apparatus big, principal series
The influence of the change in shape of system lens, zooming system lens, update the system lens is small,
(ii) on the other hand, in short focus point side, pair of the change in shape of focusing system lens to entire Zoom lens apparatus
It is influenced caused by coke small；
(iii) in monitoring in high power zoom lens system device, in general, by monitor it is remote for the purpose of and in focal length
Point side is used, and therefore, it is effective that can correct the focal shift as caused by variation of ambient temperature in long focus side；
(iv) long focus side focal shift is modified as caused by variation of ambient temperature in the case of, according to (i),
It is as modification method in this case, focusing system is saturating in the case where the amendment for carrying out focusing system lens becomes important
A part for mirror is as temperature adjustmemt lens so that can be relative to other lens in focusing system lens（It is hereinafter referred to as right
Coke lens）It is effective individually to carry out driving with lens to temperature adjustmemt；
(v) in such a situation it is preferred that keeping the focal power of temperature adjustmemt lens weaker than the focal power of focusing lens, with zoom
The lens of the long focus side of lens devices configure in the case of observing subject, to make by temperature adjustmemt lens and focusing with saturating
The focal plane for the focusing system lens that mirror is constituted is in the range of the depth of field of focusing lens；
(vi) it is configured with the lens of long focus side to observe the 1st point of observation and the 2nd point of observation under conditions of temperature is constant
In the case of, when making focusing with lens from the 1st set with preset mechanism in the case where not making temperature adjustmemt be moved with lens
The case where place of photographing is 1 point of observation and it is the 2nd sight when the position of point of observation is moved to the position of the 2nd point of observation
In the case of examining a little, temperature adjustmemt will produce difference with lens at a distance from focusing lens, still, burnt as caused by the difference
Plane changes still in the range of the depth of field of focusing system lens corresponding with the 1st point of observation or the 2nd point of observation, therefore, both
The 1st point of observation can be observed well, can also observe the 2nd point of observation well.
Then, the present invention provides a kind of Zoom lens apparatus, which has focusing system from object side
System lens and zooming system lens have with the focusing of defined multiplying power in the local preset mechanism of defined photography, temperature sensing
The temperature adjustmemt mechanism of device, focusing system lens, wherein focusing system lens are by temperature adjustmemt lens and focusing lens structure
At temperature adjustmemt is not connect with the driving unit of preset mechanism with lens and connect with the driving unit of temperature adjustmemt mechanism, right
Coke is not connect with the driving unit of temperature adjustmemt mechanism with lens and is connect with the driving unit of preset mechanism, focusing system lens
Temperature adjustmemt mechanism based on obtain in advance with the focal plane of focusing system lens will not according to the variation of environment temperature and
The mode of change so that temperature adjustmemt is moved with lens in the case of position of the temperature adjustmemt lens on optical axis and environment temperature
The relationship of degree makes temperature adjustmemt be moved with lens according to the environment temperature detected with temperature sensor, and preset mechanism is executing in advance
Timing, independent of environment temperature, but according to photography place and photography multiplying power make focusing system lens focusing lens and
Zooming system lens are moved in the presetting position for setting timing setting.
In particular, in above-mentioned Zoom lens apparatus, provide temperature adjustmemt lens has relative to focusing lens
The scheme of weak power of lens so that it is in the case where configuring the subject to observe a distant place with the lens of long focus side, by
Range of the focal plane for the focusing system lens that temperature adjustmemt lens and focusing lens are constituted in the depth of field of focusing lens
It is interior.
Further it is provided that a kind of monitoring system, which has multiple monitoring arrangements and passes through communication unit and each prison
The central control unit of view apparatus connection, wherein each monitoring arrangement has video camera, which has above-mentioned zoom lens
Device, central control unit have：The photography control for specifying photography direction, subject and multiplying power of photographing is sent to each monitoring arrangement
The photography control signal transmitting element of signal processed；And the receiving unit of the image sent from each monitoring arrangement, it is controlled in center
Do not include the control signal of the photography to the temperature adjustmemt lens of each monitoring arrangement in the photography control signal that device is sent out, each
In monitoring arrangement, driving unit and the photography control signal of temperature adjustmemt mechanism independently move temperature adjustmemt lens, focus
It is moved according to photography control signal with lens and zooming system lens.
Invention effect
Zoom lens apparatus according to the present invention, by the way that a part of of focusing system lens for being in object side to be used as
Temperature adjustmemt lens, so that the temperature adjustmemt with lens is moved such easy structure correct focusing system lens by
Focal shift caused by environment temperature.The long focus side of the high power zoom lens system device used in monitoring video camera etc.
The offset of focusing position as caused by environment temperature, substantially by the offset institute of the focusing position of the focusing system lens of object side
It causes, therefore, by carrying out the temperature adjustmemt of focusing system lens, thus in long focus side, it can be without other lens systems
The offset of focusing position is substantially eliminated in the case of the temperature adjustmemt of system.
In addition, being to have focusing system lens, zoom system from object side in the lens arrangement for making Zoom lens apparatus
In the case of 4 groups of structures of lens, update the system lens and main system lens of uniting, when according to the temperature detected with temperature sensor
When degree makes the 2nd temperature adjustmemt of the part as main system lens be moved with lens, moreover it is possible to be eliminated by ring in practical application
The focal shift of short focus point side caused by the temperature of border.
Thus, how Zoom lens apparatus according to the present invention can independently set used as preset value with environment temperature
The position of fixed each lens system.It is therefore not required to the embedded temperature adjustmemt mechanism in preset mechanism.
Description of the drawings
Fig. 1 is the definition graph of the effect of the Zoom lens apparatus of embodiment.
Fig. 2A is the summary sectional view of the video camera for the Zoom lens apparatus for having embodiment.
Fig. 2 B are the summary sectional views of the video camera for the Zoom lens apparatus for having embodiment.
Fig. 2 C are the summary sectional views of the video camera for the Zoom lens apparatus for having embodiment.
The definition graph of the action of each lens when Fig. 3 is zoom action.
Specific implementation mode
Hereinafter, explaining the present invention in detail while with reference to attached drawing.In addition, in the various figures, same reference numerals indicate
Identical or same inscape.
Fig. 2A is the block diagram of the Zoom lens apparatus 1 of one embodiment of the present of invention, and Fig. 2 B, Fig. 2 C are its deformation schemes.
The Zoom lens apparatus 1 of the embodiment be the purposes of monitoring video camera for being suitble to monitor a distant place with high zoom ratio etc.,
Has the Zoom lens apparatus of preset mechanism.
Zoom lens apparatus 1 is configured to 4 groups of lens arrangement, more specifically, has progress successively from object side
The focusing system lens 2 of focusing, the zooming system lens 3 for undertaking anamorphosis function, the movement corrected with zooming system lens 3 are accompanied
Focus movement update the system lens 4 and the virtual image is become to the main system lens 5 of real image, update the system lens 4 with it is main
Has aperture between system lenses 5（It is not shown）.In addition, these focusing system lens 2, zooming system lens 3, update the system are saturating
Mirror 4 and main system lens 5 are made of compound lens respectively.
About the focusing system lens 2 in these lens, in order to inhibit chromatic aberation, formed using by special low dispersing glass
ED lens or fluorite lens.Therefore, because the coefficient of thermal expansion compared with other lens 3,4,5 of focusing system lens 2 is high, so shape
Shape is easy to be changed according to environment temperature, and focal position is easily varied as a result,.
In the frame of bearing focusing system lens 2（housing）On, in order to detect the environment temperature of focusing system lens 2
And it is provided with temperature sensor 10.
In the present invention, which is characterized in that focusing system lens 2 are in order to be caused the focusing system lens 2 by temperature
The variation of focal position be modified, part of it becomes temperature adjustmemt lens 2A, and other lens become special and undertake pair
The focusing of burnt function lens 2B, temperature adjustmemt lens 2A can be with the lens other than focusing lens 2B, focusing system lens 2
（That is, zooming system lens 3, update the system lens 4, main system lens 5）Independently by the driving unit of temperature adjustmemt mechanism
It is moved in optical axis L 0.
In such a case it is possible to as shown in Figure 2 A, temperature adjustmemt with lens 2A in focusing system lens 2 near
Object side, can also be as shown in Figure 2 B, and temperature adjustmemt is in focusing lens 2B with lens 2A1、2B2Between, it can also be as schemed
Shown in 2C, temperature adjustmemt is with lens 2A near observation image side in focusing system lens 2.From making temperature adjustmemt mechanism
From the point of view of driving unit becomes simple, preferably make temperature adjustmemt lens 2A near object side.
Preferable temperature amendment is with the focal power of lens 2A relative to focusing lens 2B, 2B1、2B2Focal power it is weaker, in zoom
The lens of the long focus side of lens devices 1 configure（The TELE of Fig. 3）It is in the case of middle observation subject, saturating by temperature adjustmemt use
Mirror 2A and focusing lens 2B, 2B1、2B2The focal plane of the focusing system lens 2 of composition is in focusing lens 2B, 2B1、2B2's
In the range of the depth of field.Because the depth of field of focusing lens is dependent on the focal lengths of focusing lens, the diameter of opening aperture,
The focal length of focusing lens, diameter of opening aperture etc. are considered to set above-mentioned focal power.
Temperature adjustmemt mechanism has the driving unit of the temperature adjustmemts lens such as position control sensor, stepper motor
11, temperature adjustmemt controller 20.
In temperature in use correction mechanism, investigation is so that the focal plane of focusing system lens 2 will not be according to environment temperature in advance
The variation of degree and the mode that changes only makes the situation that temperature adjustmemt lens 2A is moved（That is, not making focusing lens 2B, 2B1、
2B2The situation for moving temperature adjustmemt lens 2A in the case of movement）Under temperature adjustmemt with lens 2A in optical axis L 0
The relationship of position and environment temperature, the relationship storage of position and environment temperature by the temperature adjustmemt with lens 2A in optical axis L 0
In temperature adjustmemt controller 20.Moreover, when using Zoom lens apparatus 1, temperature adjustmemt is with controller 20 according to above-mentioned
Relationship, so that temperature adjustmemt is moved to the position in optical axis L corresponding with the temperature detected with temperature sensor 10 0 with lens 2A
Mode, the driving unit 11 of the control temperature adjustmemts lens such as stepper motor.
For example, such as Fig. 1（a）It is shown, make Zoom lens apparatus 1（The focal length f of temperature adjustmemt lens 2AA, focusing is with saturating
The focal length f of mirror 2BB）In temperature T0It is D to be focused at DEG C in the distance away from Zoom lens apparatus 10In the case of the 1st point of observation of m,
Such as Fig. 1（b）It is shown, when environment temperature becomes T1DEG C when, temperature adjustmemt is with the focal length of lens 2A from fAVariation is fA', focusing is with thoroughly
The focal length of mirror 2B is also from fBVariation is fB', the focal plane of the 1st point of observation in focusing system lens 2 is from F0To F0' offset.In
It is, in the present invention, such as Fig. 1（C）It is shown, so that the position of the focal plane of the 1st point of observation returns to initial F0Mode make
Temperature adjustmemt is moved with lens 2A on optical axis.Here, investigation temperature adjustmemt lens 2A should take according to environment temperature in advance
Optical axis on position.
Then, in temperature T1Focusing is in the case of the 2nd point of observation at DEG C, such as Fig. 1（D）It is shown, make focusing lens 2B,
Zooming system lens 3 and update the system lens 4 are set for moving according to presetting.At this point, because of not environment temperature
Variation, so temperature adjustmemt lens 2A will not be from Fig. 1（C）Shown in position moved.Therefore, although in focusing in the 2nd
Temperature adjustmemt in the case of point of observation at a distance from focusing lens 2B and is focused in the case of the 1st point of observation with lens 2A
Temperature adjustmemt is different at a distance from focusing lens 2B with lens 2A, focusing system in the case where focusing is in 2 point of observation
The focal length f of system lens 20' focal length f with focusing system lens 2 of the focusing in the case of the 1st point of observation0Difference, still, thus
Caused by focal plane variation still in the range of the depth of field of focal plane corresponding with the 2nd point of observation.Thus, it can also see well
Examine the 2nd point of observation.
Here, temperature adjustmemt with positions of the lens 2A in optical axis L 0 not as relative to the opposite of focusing lens 2B
Position but investigated as the absolute position in optical axis L 0, be stored in temperature adjustmemt controller 20.For example, adjusting
Burnt system lenses 2 are in the case where having defined focal position at a temperature of some, so that focusing system lens 2 are in arbitrary temperature
The mode that the focal position is all maintained under degree, temperature is investigated on the basis of the defined position in the frame of Zoom lens apparatus 1
The position for spending amendment lens 2A, is stored in temperature adjustmemt controller 20.When using Zoom lens apparatus 1, such as Fig. 3 institutes
Show, focusing is focused with lens 2B and moved in optical axis L 0,4 basis of zooming system lens 3 and update the system lens
Defined zoom ratio is taken from long focus（TELE）Side is to short focus point（WIDE）Position between side, still, temperature adjustmemt are used
Lens 2A is unrelated with the position of lens 2B, zooming system lens 3 and update the system lens 4 with these focusings, with zoom lens
On the basis of the frame of device 1, it is moved to the position in the optical axis L 0 determined by the relationship with temperature.
In the Zoom lens apparatus of the present invention, although focusing lens 2B, zooming system lens 3, update the system lens
4, main system lens 5 can be constituted in the same manner as the zoom lens of well-known 4 groups of structures, still, in the zoom of the present embodiment
In lens devices 1, main system lens 5 and the temperature adjustmemt of above-mentioned focusing system lens 2 are in the same manner as lens 2A, by the 2nd temperature
Spend the lens of amendment with lens 5A and in addition to this（Real image formation lens）5B is constituted, and the 2nd temperature adjustmemt can phase with lens 5A
Real image formation is independently moved with lens 5B.In addition, though in Fig. 2A~Fig. 2 C, the 2nd temperature adjustmemt is set with lens 5A
The object side in main system lens 5 is set, but it is also possible to be arranged the 2nd temperature adjustmemt lens in main system lens 5
Observation image side.
The temperature adjustmemt mechanism of 2nd temperature adjustmemt lens 5A also has the drives such as position control sensor, stepper motor
Moving cell 12 is connect with temperature adjustmemt controller 20.In temperature adjustmemt in controller 20, with above-mentioned focusing system lens
2 temperature adjustmemt with the case where lens 2A similarly, in advance investigation for correct main system lens 5 as caused by environment temperature
The temperature adjustmemt of the variation of focal position positions of the lens 5A in optical axis L 0 and the temperature with the detection of temperature sensor 10
Correspondence is simultaneously registered.Temperature adjustmemt is based on the correspondence with controller 20, so that temperature adjustmemt is moved with lens 5A
Driving unit 12 is controlled to by way of the position in the optical axis L 0 that the temperature detected with temperature sensor 10 determines.
About the offset of the focal position of short focus point side caused by the variation as environment temperature, the focus of main system lens 5
The bias effect of position is larger, therefore, by using a part for main system lens 5 as the 2nd temperature adjustmemt with lens 5A root
According to the temperature movement detected with temperature sensor 10, so as to substantially eliminate the focus as caused by environment temperature of short focus point side
The offset of position.In the present invention, the temperature adjustmemt mechanism of such main system lens 5 can be according to the use of Zoom lens apparatus 1
It waits and is configured as needed on the way.
On the other hand, it in the Zoom lens apparatus of the present embodiment 1, in focusing lens 2B, zooming system lens 3, repaiies
Positive system lens 4 are equipped with the driving mechanism for having preset mechanism.More specifically, these lens are machined with cam to be assemblied in
The cylindric component of slot and the mode that can be moved in optical axis L 0 is constituted.In this case, zooming system lens 3 and amendment system
System lens 4 mechanically link, as shown in figure 3, taking long focus side（TELE）Or short focus point side（WIDE）Configuration.
It is driven with lens in addition, being equipped with the focusing for having position control sensor and stepper motor with lens 2B in focusing
Motivation structure 13 is also equipped in zooming system lens 3 and update the system lens 4 and has position control sensor and stepper motor
Zoom driving mechanism 14, these driving mechanisms 13,14 connect with presetting presetting controller 21 is controlled.
In presetting controller 21, the setting of preset value is carried out.That is, investigation is in order to defined camera shooting multiplying power pair in advance
Position of the defined local each lens for being imaged and being needed of photography in optical axis L 0, is stored in presetting controller 21.This
Outside, it is also associated with the horizontal direction to Zoom lens apparatus 1 in presetting controller 21（Pan）And vertical direction（Tilt）It carries out
The holder of control（Pan-Tilt）Driving mechanism needs to be imaged to the photography place on defined direction
Holder angle is stored in presetting controller 21.
Moreover, when reality images presetting defined photography place, by the control of presetting controller 21,
Zoom lens apparatus 1 focusing lens 2B, zooming system lens 3 in Zoom lens apparatus and is repaiied towards presetting direction
Positive system lens 4 are moved to presetting position.
Then, the application method of the Zoom lens apparatus 1 of definition graph 1.
（Step 1）
First, the initial setting as Zoom lens apparatus 1, will be in order to correct being caused by temperature for focusing system lens 2
Focal position variation and the temperature adjustmemt position of lens 2A that needs and the correspondence of its environment temperature are stored in temperature
Spend amendment controller 20.In addition, temperature adjustmemt in controller 20, be also stored in order to correct main system lens 5 by
The variation of focal position caused by temperature and the temperature adjustmemt position of lens 5A and the correspondence of its environment temperature needed.
（Step 2）
It, when video camera is imaged, drives and is controlled by above-mentioned temperature adjustmemt by the assembly of Zoom lens apparatus 1
The temperature adjustmemt lens driving unit 11 that device 20 controls, it is corresponding with environment temperature with the position of lens 2A based on temperature adjustmemt
Relationship makes temperature adjustmemt be moved to the position of lens 2A corresponding with the temperature when camera shooting detected with temperature sensor 10
Position.Similarly, the 2nd temperature adjustmemt lens driving unit of main system lens 5 is driven with temperature adjustmemt with controller 20
12, when the temperature adjustmemt of main system lens 5 being made to be moved to and use the photography that temperature sensor 10 detects with the position of lens 5A
The corresponding position of temperature.
（Step 3）
Then, when to defined photography place setting preset value, as step 2, it is set as the temperature of focusing system lens
The state that degree amendment is corrected with the temperature adjustmemt of lens 2A and main system lens 5 with the position of lens 5A respectively.Moreover, investigation
In order to defined multiplying power to defined photography place imaged and need, the focusing of focusing system lens 2 lens 2B,
The position that zooming system lens 3 and update the system lens 4 should be taken is stored in the presetting controller of control presetting function
21.Multiple photography places can be carried out with the setting of such preset value.In addition, the real image of main system lens 5, which is formed, uses lens 5B
Position be fixed.
（Step 4）
It is such also like step 2 in the case where reality images presetting photography place, it is set as focusing system lens
The state that 2 temperature adjustmemt is corrected with the temperature adjustmemt of the position of lens 2A and main system lens 5 with the position of lens 5A.And
And the focusing of focusing system lens 2 is made to be moved respectively with the position of lens 2B, zooming system lens 3 and update the system lens 4
To presetting position.
Like this, Zoom lens apparatus according to the present invention passes through temperature when being imaged with Zoom lens apparatus 1
The movement of amendment lens 2A can correct the offset of focal position as caused by temperature of focusing system lens 2.When the amendment
Temperature adjustmemt is with the position of lens 2A according to position obtaining in step 1, being modified required temperature adjustmemt lens 2A
It sets and is determined with the correspondence of its environment temperature, independent of focusing lens 2B when using Zoom lens apparatus 1, zoom
The position of system lenses 3 etc..
Thus, easy mechanism can be used to correct the focal shift as caused by temperature change of Zoom lens apparatus 1.In addition,
Even if environment temperature when setting preset value has differences with environment temperature when actually being imaged, as long as in actual camera shooting
When so that focusing lens 2B, zooming system lens 3 of focusing system lens 2 etc. is located in presetting position, do not need root
The cumbersome operations such as preset value are reset according to environment temperature.
In addition, the amendment about the temperature in use amendment lens 2A as above, in powerful Zoom lens apparatus 1
When in long focus side, specifically, it is especially effective when being 20 times or more, preferably 34 times or more of high magnification, in short focus
Point side, with lens 5A is effective using the temperature adjustmemt of main system lens 5.But it is equipped on monitoring in Zoom lens apparatus
In the case of with video camera etc., in general, mostly used in powerful long focus side, therefore, the temperature of main system lens 5 is repaiied
As long as being just arranged as needed with lens 5A.In addition, the temperature correction as main system lens 5, is not limited to picture
It above-mentioned the case where like that using a part for main system lens 5 with lens 5A as temperature adjustmemt, can also be saturating by main system
Mirror 5 carries out position correction as a whole.Amendment in this case is caused by obtaining to lower or eliminate in advance by environment temperature
The correspondence of position and its environment temperature of main system lens 5 of focal shift carry out.
In addition it is also possible to be provided independently from the driving mechanism of zooming system lens 3 and update the system lens 4 so that can be solely
The on the spot position of adjustment zooming system lens 3 and update the system lens 4.
In turn, Zoom lens apparatus 1 can also be the lens arrangement other than 4 groups.
Have the monitoring arrangement of the Zoom lens apparatus of the present invention in multiple place settings, filled each monitoring with communication unit
It sets and is connect with central control unit come in the case of constructing monitoring system, it is single that there is central control unit photography control signal to send
Member, the photography control signal transmitting element execute presetting photography conditions or the point of observation to not carrying out presetting setting by specified
The photography control signal of photography conditions in the case of being photographed is sent to each monitoring arrangement, more specifically, by specified sight
The photography control signal for examining distance, photography direction, photography multiplying power a little etc. is sent to each monitoring arrangement.In addition, center control dress
Set the receiving unit with the image sent from each monitoring arrangement.
Do not include using thoroughly the temperature adjustmemt of each monitoring arrangement in the photography control signal that the central control unit is sent out
The photography of mirror controls signal.In each monitoring arrangement, what driving unit and the central control unit of temperature adjustmemt mechanism were sent out takes the photograph
Shadow control signal independently moves temperature adjustmemt lens.On the other hand, focusing is moved with lens according to photography control signal
It is dynamic.
Like this, it is carried out to the zoom lens in each monitoring arrangement by the temperature adjustmemt mechanism being arranged by each monitoring arrangement
The temperature adjustmemt of device, for the change of the preset position as caused by environment temperature, is excluded in central control unit
Except the object of control, the burden of central control unit can be mitigated as a result,.
Industrial availability
The Zoom lens apparatus of the present invention can be mounted in the camera shootings for various purposes such as monitoring video camera, home-use video camera
Machine.Moreover, particularly useful in following monitoring video camera, that is, use preset mechanism more, need powerful zoom work(
Can, in order to not only daytime and also night also photographed and in lens system using fluorite lens, ED lens.
Reference sign
1：Zoom lens apparatus；
2：Focusing system lens；
2A：Temperature adjustmemt lens；
2B、2B1、2B2：Focusing lens；
3：Zooming system lens；
4：Update the system lens；
5：Main system lens；
5A：The temperature adjustmemt lens of main system lens；
5B：Lens other than the temperature adjustmemt lens of main system lens（Real image formation lens）；
10：Temperature sensor；
11：The driving unit of temperature adjustmemt lens；
12：The driving unit of 2nd temperature adjustmemt lens；
13：Focusing lens actuating device；
14：Zoom driving mechanism；
20：Temperature adjustmemt controller；
21：Presetting controller；
L0：Optical axis.
Claims (5)
1. a kind of Zoom lens apparatus has focusing system lens and zooming system lens from object side, have with regulation
Multiplying power focusing it is defined photography place preset mechanism, temperature sensor, focusing system lens temperature adjustmemt mechanism,
In,
Focusing system lens are made of temperature adjustmemt with lens and focusing with lens,
Temperature adjustmemt is not connect with the driving unit of preset mechanism with lens and is connect with the driving unit of temperature adjustmemt mechanism,
Focusing is not connect with the driving unit of temperature adjustmemt mechanism with lens and is connect with the driving unit of preset mechanism,
The temperature adjustmemt mechanism of focusing system lens based on obtaining so that the focal plane of focusing system lens will not be due in advance
The variation of environment temperature and the mode that changes so that temperature adjustmemt is moved with lens in the case of temperature adjustmemt lens in optical axis
On position and environment temperature relationship, so that temperature adjustmemt is moved with lens according to the environment temperature detected with temperature sensor,
Preset mechanism is executing pre- timing, independent of environment temperature, but makes the focusing be according to photography place and photography multiplying power
The focusing lens and zooming system lens of system lens are moved in the presetting position for setting timing setting.
2. Zoom lens apparatus according to claim 1, wherein
Temperature adjustmemt lens have weak power of lens relative to focusing lens so that are configured with the lens of long focus side
Focusing system lens in the case of subject to observe a distant place, being constituted by temperature adjustmemt lens and focusing with lens
Focal plane is in the range of the depth of field of focusing lens.
3. Zoom lens apparatus according to claim 1, wherein
Temperature adjustmemt lens are in focusing system lens near object side.
4. Zoom lens apparatus according to claim 1, wherein
With focusing system lens, zooming system lens, update the system lens and main system lens from object side,
Main system lens are made of the 2nd temperature adjustmemt lens and real image formation with lens, have the 2nd temperature in main system lens
Correction mechanism,
2nd temperature adjustmemt do not connect with the driving unit of preset mechanism with lens and with the driving unit of the 2nd temperature adjustmemt mechanism
Connection,
Real image formation is not connect with the driving unit of the 2nd temperature adjustmemt mechanism with lens and is connected with the driving unit of preset mechanism
It connects,
2nd temperature adjustmemt mechanism based on obtaining so that the focal plane of main system lens will not be due to the variation of environment temperature in advance
And the mode changed so that the 2nd temperature adjustmemt is moved with lens in the case of position of the 2nd temperature adjustmemt lens on optical axis
With the relationship of environment temperature, the 2nd temperature adjustmemt is set to be moved with lens according to the environment temperature detected with temperature sensor,
Preset mechanism is executing pre- timing, independent of environment temperature, but makes main system according to photography place and photography multiplying power
The real image formation of lens is moved to lens carries out the presetting position for setting timing setting.
5. a kind of monitoring system, the center control dress being connect with each monitoring arrangement with multiple monitoring arrangements and by communication unit
It sets, each monitoring arrangement has video camera, which has any one of them Zoom lens apparatus of Claims 1 to 4,
In,
Central control unit has：
Photography control signal transmitting element sends the photography control signal of specified photography direction, subject and multiplying power of photographing
To each monitoring arrangement；And
Receiving unit receives the image sent from each monitoring arrangement,
Do not include taking the photograph to the temperature adjustmemt lens of each monitoring arrangement in the photography control signal that central control unit is sent out
Shadow controls signal,
In each monitoring arrangement, driving unit and the photography control signal of temperature adjustmemt mechanism independently move temperature adjustmemt with thoroughly
Mirror, focusing lens and zooming system lens are moved according to photography control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220493.XA CN105100581B (en) | 2014-05-23 | 2014-05-23 | Zoom lens apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220493.XA CN105100581B (en) | 2014-05-23 | 2014-05-23 | Zoom lens apparatus |
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| CN105100581A CN105100581A (en) | 2015-11-25 |
| CN105100581B true CN105100581B (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997141A (en) * | 2017-05-23 | 2017-08-01 | 海信集团有限公司 | The Light path correction method and optical projection system of a kind of optical projection system |
| JP7005252B2 (en) * | 2017-09-27 | 2022-01-21 | キヤノン株式会社 | Control device, image pickup device, control method, and program |
| CN111175952A (en) * | 2019-12-31 | 2020-05-19 | Oppo广东移动通信有限公司 | Zoom lens, camera module and electronic device |
| CN115236826B (en) * | 2019-12-31 | 2023-10-20 | Oppo广东移动通信有限公司 | Zoom lens, camera module and electronic device |
| CN114321840B (en) * | 2021-12-31 | 2023-08-29 | 广州市浩洋电子股份有限公司 | Stage lamp optical focusing method and stage lamp optical system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5760967A (en) * | 1993-11-30 | 1998-06-02 | Canon Kabushiki Kaisha | Zoom lens |
| JPH1164713A (en) * | 1997-08-26 | 1999-03-05 | Yamano Kogaku:Kk | Attachable/detachable lens block and video camera system using the same |
| JPH11205655A (en) * | 1998-01-12 | 1999-07-30 | Star Micronics Co Ltd | Preset camera |
| JPH11223757A (en) * | 1998-02-09 | 1999-08-17 | Canon Inc | Lens control system, method therefor and storage medium |
| JP2002006194A (en) * | 2000-06-21 | 2002-01-09 | Canon Inc | Lens device, image pickup device and image pickup system |
| JP2011039352A (en) * | 2009-08-14 | 2011-02-24 | Fujifilm Corp | Projection display device |
| US8947562B2 (en) * | 2010-05-19 | 2015-02-03 | Konica Minolta Opto, Inc. | Zoom lens and imaging device |
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