CN108008516A - A kind of imaging system - Google Patents
A kind of imaging system Download PDFInfo
- Publication number
- CN108008516A CN108008516A CN201810071902.2A CN201810071902A CN108008516A CN 108008516 A CN108008516 A CN 108008516A CN 201810071902 A CN201810071902 A CN 201810071902A CN 108008516 A CN108008516 A CN 108008516A
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- Prior art keywords
- lens group
- guide groove
- sensitive chip
- diaphragm
- imaging system
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- 238000003384 imaging method Methods 0.000 title claims abstract description 75
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 239000000571 coke Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 51
- 239000013307 optical fiber Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000008450 motivation Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 17
- 238000012544 monitoring process Methods 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 230000004297 night vision Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- G02B7/006—Filter holders
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/667—Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
Abstract
The present invention relates to a kind of imaging system, including：Optical unit, including the first lens group with positive light coke, the second lens group with negative power, the 3rd lens group with positive light coke and the 4th lens group with positive light coke set gradually by thing side to image side；Imaging unit, including prism, the first sensitive chip for receiving visible ray and the second sensitive chip for receiving infrared light.The compact-sized of whole optical unit is made by above-mentioned setting, optical unit is engaged the blur-free imaging realized under visible light conditions on daytime with the first sensitive chip in imaging unit, and optical unit is engaged with the first sensitive chip in imaging unit and the second sensitive chip, using infrared light and visible ray jointly imaging it is achieved thereby that brightness and color while, are taken into account under conditions of at night, visible ray is weaker, fully reduce true environment, the object looks at night, make imaging image quality penetrating, it is clear-cut.
Description
Technical field
The present invention relates to a kind of imaging system, more particularly to a kind of optical focus switchable imaging system.
Background technology
With the development of society, the security precautions of people are continuously improved, therefore safety monitoring industry also obtains at a high speed
Development, the effect for monitoring performance are also increasing.The especially release of high definition imaging system, greatly improves effective monitoring.
But common monitoring is mainly to be designed with visible light conditions on daytime with imaging system, can only be seen under visible light conditions
Monitor target.Since night visible ray cannot meet the imaging requirements of common monitoring imaging system, in much monitoring fields
Close, the monitoring at night is gradually taken seriously.Although imaging system pixel is higher and higher, night vision effect is still difficult to meet night
Between blur-free imaging needs.
The development of monitoring technology of the demand driving of night monitoring, with the development of technology, market is to monitoring imaging system
The night vision effect demand of system is also higher and higher, and it is true that common monitoring imaging system is difficult to reduction night in the case of night is unglazed
The environment of reality, object looks.Simultaneously as the wavelength of infrared light is different from the wavelength of visible ray, this makes common imaging system exist
The image planes position being imaged under the conditions of infrared light with it is inconsistent under visible ray, cause image blur, image quality poor.
The content of the invention
It is an object of the invention to provide a kind of imaging system, solves the problems, such as that imaging system nighttime imaging is ropy.
For achieving the above object, the present invention provides a kind of imaging systems of, including：
Optical unit, including set gradually by thing side to image side the first lens group with positive light coke, with negative light
The second lens group, the 3rd lens group with positive light coke and the 4th lens group with positive light coke of focal power；
Imaging unit, including prism, the first sensitive chip for receiving visible ray and second for receiving infrared light
Sensitive chip.
According to an aspect of the present invention, the optical unit further includes：
Diaphragm, the diaphragm is between second lens group and the 3rd lens group；
First driving mechanism, for driving second lens group along optical axis in first lens group and described 3rd saturating
Moved back and forth between microscope group；
Second driving mechanism, for driving the 4th lens group single in the 3rd lens group and the imaging along optical axis
Moved back and forth between member；
3rd driving mechanism, the aperture of the light hole for adjusting the diaphragm.
According to an aspect of the present invention, first driving mechanism, second driving mechanism and the 3rd driving
Mechanism is respectively manual adjustment means, and is respectively equipped with locking member.
According to an aspect of the present invention, first driving mechanism includes：
First focusing ring, it is described first focusing ring in have and the first axially in parallel guide groove；
First cylinder, first cylinder are provided through the first helical guide groove of first cylinder, and described first
Focusing ring is set on the outside of first cylinder；
First guide pin, one end of first guide pin are slidably connected with the first guide groove and the first helical guide groove respectively, its is another
One end is mutually permanently connected with second lens group.
According to an aspect of the present invention, second driving mechanism includes：
Focus outside second, focus outside described second in have and the second axially in parallel guide groove；
Second outer barrel, second outer barrel be provided through second outer barrel and along second outer barrel week
To the arc guide barrel of extension, and focusing ring is set on the outside of second outer barrel outside described second；
Second interior focusing circle, have in the second interior focusing circle with the 3rd axially in parallel guide groove, and outside described second
Cylinder is set on the outside of the second interior focusing circle；
Second inner cylinder, second inner cylinder are provided through the second helical guide groove of second inner cylinder；
Second guide pin, one end and the second guide groove of second guide pin are connected, and are slidably connected with arc guide barrel, its
The other end is mutually permanently connected with the second interior focusing circle；
3rd guide pin, one end of the 3rd guide pin are slidably connected with the 3rd guide groove and the second helical guide groove respectively, its is another
One end is mutually permanently connected with the 4th lens group.
According to an aspect of the present invention, the 3rd driving mechanism, including：
Diaphragm preselection ring, has in the diaphragm preselection ring and axially in parallel diaphragm adjusts guide groove；
Diaphragm connected nail, described diaphragm connected nail one end and the diaphragm adjust guide groove and are connected, the other end with it is described
Diaphragm is fixedly connected.
According to an aspect of the present invention, the prism includes：
Cemented surface, has transmission visible ray on the cemented surface and reflects the plated film of infrared light；
First exit facet, first exit facet is parallel with first sensitive chip and is oppositely arranged；
Second exit facet, second exit facet is parallel with second sensitive chip and is oppositely arranged.
According to an aspect of the present invention, imaging unit further includes：
Switching device of optical fiber, the switching device of optical fiber are located at first exit facet and first sensitive chip
Between；
Visible ray edge filter, the visible ray edge filter are located at second exit facet and described second photosensitive
Between chip.
According to an aspect of the present invention, the switching device of optical fiber is electric device, and is cut for switching infrared light
Only and polarizing filter.
According to an aspect of the present invention, the first angle α between the transmission direction of the cemented surface and incident light meets
55°±10°。
According to an aspect of the present invention, the second angle β between first exit facet and second exit facet expires
70 ° ± 10 ° of foot.
A kind of scheme according to the present invention, by the way that the first lens group, the 3rd lens group and the 4th lens group are set respectively
For positive light coke, the second lens group is arranged to negative power.So that whole optical unit is compact-sized, optical unit with into
As the first sensitive chip is engaged the blur-free imaging realized under visible light conditions on daytime, and optical unit and imaging list in unit
The first sensitive chip and the second sensitive chip are engaged in member, are imaged jointly it is achieved thereby that at night using infrared light and visible ray
Between visible ray it is weaker under conditions of brightness and color while take into account, fully reduce true environment, the object looks at night, make
It is penetrating to be imaged image quality, it is clear-cut.
A kind of scheme according to the present invention, by using manual the first driving mechanism and the second driving mechanism so as to easy
Quickly focus to the second lens group and the 4th lens group.Hand operated focalizing mechanism is simple in structure, service life length.Especially should
For monitoring in the complex environments such as place, the service life for improving the imaging system of the present invention is more conducive to.First driving machine
Locking member is provided with structure and the second driving mechanism, the position of the second lens group and the 4th lens group consolidates after the completion of guarantee focusing
It is fixed, so as to ensure that optical unit being capable of stably blur-free imaging.
A kind of scheme according to the present invention, the aperture of the 3rd driving mechanism adjusting light hole of diaphragm manually, the 3rd
Driving mechanism structure is simple, service life length.The hole that locking member ensures the light hole after adjusting is provided with 3rd driving mechanism
Footpath is fixed, so as to ensure that optical unit being capable of stably blur-free imaging.
A kind of scheme according to the present invention, the first angle α between cemented surface and optical axis on prism meet 55 ° ± 10 °,
By above-mentioned setting, it ensure that the light of reception is effectively divided into infrared light and visible ray by the cemented surface of prism.If the first angle α
Beyond above range, infrared light and visible ray are difficult to be separated.Meanwhile first the second folder between exit facet and the second exit facet
Angle beta meets 70 ° ± 10 °, it is seen that optical transmission direction remains vertical with the first exit facet, and infrared optical transmission direction goes out with second
The face of penetrating remains vertical, avoids the refraction effect of visible ray and infrared light in the prism, improve the first sensitive chip and
The imaging effect of second sensitive chip.
A kind of scheme according to the present invention, switching device of optical fiber is set between the first exit facet and the first sensitive chip.
Infrared cut of light optical filter and polarizing filter are installed on switching device of optical fiber, can be used on daytime and night infrared
Light edge filter, can filter out remaining infrared light in visible ray by infrared cut of light optical filter, make the first photosensitive core
The imaging clearly of piece, so that it is guaranteed that the imaged color of the first sensitive chip.Certainly under daytime high light conditions, filter can also be passed through
Polarizing filter is switched between the first exit facet and the first sensitive chip by mating plate switching device, can so make sky dimmed
Or suppress the dazzle produced on the water surface such as lake or ocean, the imaging system of the present invention can be made by using polarizing filter
Imaging effect under conditions of daytime intense light irradiation is more preferable.It can make the imaging system of the present invention by using switching device of optical fiber
System under different scenes can blur-free imaging, ensure that the present invention imaging effect, make the present invention use scope it is wider.Together
When, between the second exit facet and the second sensitive chip set visible ray edge filter so that by it is remaining in infrared light can
See that light filters, it is ensured that the brightness of image of the second sensitive chip under night mode, makes the image quality higher of the second sensitive chip,
Avoid the interference of visible ray.Visible ray edge filter is set to also assures that between the second exit facet and the second sensitive chip
The confocal effect of first sensitive chip and the second sensitive chip, makes the imaging system blur-free imaging of the present invention.
Brief description of the drawings
Fig. 1 schematically shows a kind of structure chart of the imaging system of embodiment according to the present invention；
Fig. 2 schematically shows a kind of structure chart of the prism of embodiment according to the present invention.
Embodiment
, below will be to embodiment in order to illustrate more clearly of embodiment of the present invention or technical solution of the prior art
Needed in attached drawing be briefly described.It should be evident that drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skills, without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
When being described for embodiments of the present invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", " preceding ",
" rear ", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", the orientation expressed by " outer " or position relationship are to be based on phase
Orientation shown in the drawings or position relationship are closed, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore above-mentioned term cannot
It is interpreted as limitation of the present invention.
The present invention is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot go to live in the household of one's in-laws on getting married one by one herein
State, but therefore embodiments of the present invention are not defined in implementation below.
As shown in Figure 1, a kind of embodiment, imaging system of the invention include according to the present invention：Optical unit 1 and into
As unit 2.In the present embodiment, optical unit 1 includes the first lens group 11, the second lens group 12, the 3rd lens group 13, the
Four lens groups 14 and diaphragm 15.By thing side to image side, the first lens group 11, the second lens group 12, diaphragm in optical unit 1
15th, the 3rd lens group 13 and the 4th lens group 14 are sequentially coaxially set.Wherein, the first lens group 11, the 3rd lens group 13 and
Four lens groups 14 are respectively positive light coke, and the second lens group 12 is negative power.Extraneous light passes sequentially through the first lens group
11st, the second lens group 12, diaphragm 15, the 3rd lens group 13 and the 4th lens group 14 are transferred in imaging unit 2.
As shown in Figure 1, a kind of embodiment, optical unit 1 further include the first driving mechanism 16, second according to the present invention
17 and the 3rd driving mechanism 18 of driving mechanism.In the present embodiment, the first lens group 11, the second lens group 12, diaphragm 15,
Three lens groups 13 and the 4th lens group 14 are located on same optical axis A.The position of first lens group 11 and the 3rd lens group 13 is fixed.
First driving mechanism 16 is connected with each other with the second lens group 12, and the second lens group 12 is driven along light by the first driving mechanism 16
Axis A is linearly moved back and forth.Second driving mechanism 17 is connected with each other with the 4th lens group 14, passes through the second driving mechanism 17 driving the
Four lens groups 14 are linearly moved back and forth along optical axis A.3rd driving mechanism 18 is connected with each other with diaphragm 15, passes through the 3rd driving machine
Structure 18 adjusts the aperture of the light hole of diaphragm 15.In the present embodiment, the first driving mechanism 16, the second driving mechanism 17 and
Three driving mechanisms 18 are respectively manual adjustment means.
As shown in Figure 1, a kind of embodiment, the first driving mechanism 16 include according to the present invention：First focusing ring 161,
First cylinder 162 and the first guide pin 163.In the present embodiment, the first lens group 11 is fixedly mounted in the first cylinder 162,
And it is fixedly mounted in one end of 162 nearly thing side of the first cylinder.Second lens group 12 is similarly installed in the first cylinder 162, and
And second lens group 12 be slidably connected with the first cylinder 162.Three the first helical guide grooves are provided with the first cylinder 162
162a, the first helical guide groove 162a run through the barrel of the first cylinder 162.First guide pin, 163 one end and the second lens group 12 are mutual
It is fixedly connected, the other end is slidably connected with the first helical guide groove 162a.First focusing ring 161 can be rotated relative to the first cylinder 162
Ground is installed on the outside of the first cylinder 162, and the first focusing ring 161 is mutually coaxially disposed with the first cylinder 162.In the first focusing ring
Have in 161 with the first axially in parallel guide groove 161a, one end that the first guide pin 163 and the first helical guide groove 162a are slidably connected
It extend into the first guide groove 161a and is mutually slidably connected.By rotating the first focusing ring 161 so that the first guide pin 163 is the
Under one guide groove 161a and the first helical guide groove 162a collective effects, the second lens group 12 of driving is in the first cylinder 162 along optical axis A
It is linear to move back and forth.In the present embodiment, the quantity and the quantity phase of the first helical guide groove 162a that the first guide pin 163 is set
Together.Certainly, the first helical guide groove 162a can also be four, five etc..
As shown in Figure 1, a kind of embodiment, the second driving mechanism 17 include according to the present invention：Focus outside second
171st, the second outer barrel 172, the second interior focusing circle 173, the second inner cylinder 174, the second guide pin 175 and the 3rd guide pin 176.At this
In embodiment, the second inner cylinder 174 is mutually coaxially fixedly connected with the first cylinder 162.3rd lens group 13 is fixedly mounted
In the second inner cylinder 174, and the 3rd lens group 13 is fixedly mounted in one end of 174 nearly thing side of the second inner cylinder.4th is saturating
Microscope group 14 is similarly installed in the second inner cylinder 174, and the 4th lens group 14 is slidably connected with the second inner cylinder 174.At this
In embodiment, three second helical guide grooves 174a, the second helical guide groove 174a are provided with the second inner cylinder 174 and run through second
The barrel of inner cylinder 174.3rd guide pin, 176 one end is mutually permanently connected with the 4th lens group 14, and the other end spiral is led with second
Groove 174a is mutually slidably connected.Second interior focusing circle 173 can be rotatably mounted at the second inner cylinder with respect to the second inner cylinder 174
174 outside, the second interior focusing circle 173 are mutually coaxially disposed with the second inner cylinder 174.Have in the second interior focusing circle 173
With the 3rd axially in parallel guide groove 173a, one end that the 3rd guide pin 176 and the second helical guide groove 174a are slidably connected extend into
It is slidably connected in three guide groove 173a and mutually.By rotating the second interior focusing circle 173 so that the 3rd guide pin 176 is in the 3rd guide groove
Under 173a and the second helical guide groove 174a collective effects, the 4th lens group 14 of driving is linear along optical axis A in the second inner cylinder 174
Move back and forth.In the present embodiment, the quantity and the second helical guide groove 174a that the 3rd guide pin 176 and the 3rd guide groove 173a are set
Quantity it is identical.Certainly, the second helical guide groove 174a can also be four, five etc..
In the present embodiment, the second outer barrel 172 is mutually coaxially disposed with the second interior focusing circle 173, and in second
Focusing ring 173 can be rotated relative to the second outer barrel 172.The second outer barrel 172 fixed company mutually coaxial with the second inner cylinder 174
Connect, the second outer barrel 172 is set in the outside of the second inner cylinder 174, and the second interior focusing circle 173 is located at 172 He of the second outer barrel
Between second inner cylinder 174.An arc along the circumferentially extending of the second outer barrel 172 is provided with the second outer barrel 172 to lead
Groove 172a, arc guide barrel 172a run through the barrel of the second outer barrel 172.Second guide pin, 175 one end and 173 phase of the second interior focusing circle
Mutually it is fixedly connected, the other end is mutually slidably connected with arc guide barrel 172a.Focusing ring 171 can be with respect to the second outer barrel outside second
172 are rotatably mounted at the outside of the second outer barrel 172, and focusing ring 171 is mutually coaxially set with the second outer barrel 172 outside second
Put.Have outside second in focusing ring 171 and the second axially in parallel guide groove 171a, the second guide pin 175 and arc guide barrel 172a
The one end being slidably connected is extend into the second guide groove 171a and the connection that cooperates.By rotate second outside focusing ring 171 so as to
Make the second guide pin 175 under the second guide groove 171a and arc guide barrel 172a collective effects, the second interior focusing circle 173 of driving is second
Rotated coaxially in outer barrel 172 with focusing ring 171 outside second, by the rotation of the second interior focusing circle 173, drive the 4th lens group
14 linearly move back and forth in the second inner cylinder 174 along optical axis A.In the present embodiment, the second guide pin 175 and the second guide groove
The quantity that 171a is set is identical with the quantity of arc guide barrel 172a.Certainly, arc guide barrel 172a can also be two, three etc..
As shown in Figure 1, a kind of embodiment according to the present invention, the 3rd driving mechanism 18, including：Diaphragm preselection ring 181
With diaphragm connected nail 182.In the present embodiment, diaphragm 15 is installed between the first cylinder 162 and the second inner cylinder 174.Light
Late adjusting ring 181 can be rotatably mounted at the outside of the second inner cylinder 174 with respect to the second inner cylinder 174.In the present embodiment,
182 one end of diaphragm connected nail is connected with diaphragm preselection ring 181, and the other end is connected with diaphragm 15.In the present embodiment, diaphragm tune
Have in pitch circle 181 and adjust guide groove 181a with axially in parallel diaphragm.182 one end of diaphragm connected nail adjusts guide groove 181a with diaphragm
It is connected, the other end is mutually permanently connected with diaphragm 15.By rotating diaphragm preselection ring 181 so as to complete on diaphragm 15
The adjusting in the aperture of light hole.
As shown in Figure 1, a kind of embodiment according to the present invention, the first driving mechanism 16, the second driving mechanism 17 and the
Locking member 16a, 17a, 18a are respectively equipped with three driving mechanisms 18.In the present embodiment, the locking member of the first driving mechanism 16
16a is removably mounted on the second inner cylinder 174, and locking member 16a is threadedly coupled with the second inner cylinder 174, passes through rotation lock
Tight part 16a makes the end of locking member 16a and the first focusing ring 161 lean, so as to fix the position of the first focusing ring 161, keeps away
Exempt from the rotation of the first focusing ring 161 after the completion of focusing.The locking member 17a of second driving mechanism 17 is removably mounted on outside second
On focusing ring 171, locking member 17a is threadedly coupled with focusing ring 171 outside second, makes locking member 17a's by rotary fastenings 17a
End leans with the second outer barrel 172, so as to fix the position of focusing ring 171 outside second, avoids outside second after the completion of focusing
The rotation of focusing ring 171.The locking member 18a of 3rd driving mechanism 18 is removably mounted on diaphragm preselection ring 181, locking member
18a is threadedly coupled with diaphragm preselection ring 181, the end of locking member 18a and the second outer barrel 172 is offseted by locking member 18a
Lean on, so that the position of fixed aperture adjusting ring 181, avoid completing the aperture adjustment back stop adjusting ring of the light hole of diaphragm 15
181 rotation.
As shown in Figure 1, a kind of embodiment, imaging unit 2 include prism 21, the first sensitive chip 22 according to the present invention
With the second sensitive chip 23.In the present embodiment, prism 21 receives the light that optical unit 1 transmits, and the light that will be received
Line is divided.The light received is divided into infrared light and visible ray in prism 21, its mid-infrared light is transferred to second
Sensitive chip 23, it is seen that light is transferred to the first sensitive chip 22.
With reference to shown in Fig. 1 and Fig. 2, a kind of embodiment according to the present invention, prism 21 goes out including cemented surface 211, first
Penetrate 212 and second exit facet 213 of face.In the present embodiment, prism 21 is made of Part I 21a and Part II 21b.The
On a part of 21a with the first inclined-plane 211a, Part II 21b with the second inclined-plane 211b, Part I 21a and second
21b is divided to pass through the mutually glued connections of the first inclined-plane 211a and the second inclined-plane 211b, therefore, the first inclined-plane 211a and the second inclined-plane
211b collectively forms cemented surface 211.Plated film is provided with faying face 211, i.e., on the first inclined-plane 211a and/or the second inclined-plane
211b has plated film.Prism 21 is passed through visible ray by plated film, and reflect infrared light.First exit facet 212 is positioned at the
On a part of 21a, and the first exit facet 212 and the first sensitive chip 22 are arranged in parallel.Second exit facet 213 is positioned at the
On two part 21b, and the second exit facet 213 and the second sensitive chip 23 are arranged in parallel.The light that optical unit 1 transmits
In visible ray reach prism 21 and reach the first exit facet 212 through the plated film on cemented surface 211, it is seen that the transmission direction of light
It is perpendicular with the first exit facet 212.First exit facet 212 and the first sensitive chip 22 are opposite, by the first exit facet 212 can
See that light is then reached on the first sensitive chip 22, visible ray is received on the first sensitive chip 22 and is imaged.The light that optical unit 1 transmits
The coated reflection that infrared light in line reaches prism 21 and is glued on face 211 is to the second exit facet 213, the transmission side of infrared light
To perpendicular with the second exit facet 213.Second exit facet 213 and the second sensitive chip 23 are opposite, pass through the second exit facet 213
Infrared light is reached on the second sensitive chip 23, and the second sensitive chip 23 receives infrared light and is imaged.
With reference to shown in Fig. 1 and Fig. 2, a kind of embodiment according to the present invention, prism 21 is located at the optical axis A of optical unit 1
On, cemented surface 211 is obliquely installed with respect to optical axis A.In the present embodiment, cemented surface 211 and optical axis A (the i.e. transmission of incident light
Direction) between the first angle α meet 55 ° ± 10 °.In the present embodiment, the transmission side of the first exit facet 212 and visible ray
To keeping vertical, i.e. the first exit facet 212 is vertical with optical axis A holdings.The transmission direction of second exit facet 213 and infrared light is kept
Vertically.Therefore, the second angle β between the first exit facet 212 and the second exit facet 213 meets 70 ° ± 10 °.
As shown in Figure 1, a kind of embodiment, imaging unit 2 further include according to the present invention：24 He of switching device of optical fiber
Visible ray edge filter 25.In the present embodiment, switching device of optical fiber 24 is located at the first exit facet 212 and first photosensitive
Between chip 22.Visible ray edge filter 25 is between the second exit facet 213 and the second sensitive chip 23.In this embodiment party
In formula, infrared cut of light optical filter and polarizing filter are installed on switching device of optical fiber 24.Pass through switching device of optical fiber
24 selectively switch the type between the first exit facet 212 and the first sensitive chip 22, for example, to make the shooting effect on daytime
More preferably, can by switching device of optical fiber 24 by polarizing filter be switched to the first exit facet 212 and the first sensitive chip 22 it
Between, so that sky is dimmed or suppresses to carry out the dazzle of the generations such as the water surface.In the present embodiment, switching device of optical fiber 24 is electricity
Dynamic device.
According to the present invention, by the way that the first lens group 11, the 3rd lens group 13 and the 4th lens group 14 are respectively set to just
Focal power, the second lens group 12 are arranged to negative power.So that whole optical unit 1 is compact-sized, optical unit 1 with into
As first sensitive chip 22 is engaged the blur-free imaging realized under visible light conditions on daytime in unit 2, and optical unit 1 with into
As the first sensitive chip 22 in unit 2 and the second sensitive chip 23 are engaged, using infrared light and visible ray jointly imaging so as to
Taken into account while realizing brightness and color under conditions of visible ray is weaker at night, fully reduce night true environment,
Object looks, make imaging image quality penetrating, clear-cut.
According to the present invention, by using the first manual driving mechanism 16 and the second driving mechanism 17 so as to quickly and easily
Focus to the second lens group 12 and the 4th lens group 14.Hand operated focalizing mechanism is simple in structure, service life length.Especially apply
In the complex environments such as monitoring place, the service life for improving the imaging system of the present invention is more conducive to.First driving mechanism
16 and second are provided with locking member 16a, 17a in driving mechanism 17, ensure the second lens group 12 and the 4th lens after the completion of focusing
The fixation of the position of group 14, so as to ensure that optical unit 1 being capable of stably blur-free imaging.
According to the present invention, the 3rd driving mechanism 18 of diaphragm 15 manually adjusts the aperture of light hole, the 3rd driving machine
Structure 18 is simple in structure, service life length.The hole that locking member 18a ensures the light hole after adjusting is provided with 3rd driving mechanism 18
Footpath is fixed, so as to ensure that optical unit 1 being capable of stably blur-free imaging.
According to the present invention, the first angle α between the cemented surface 211 and optical axis A on prism 21 meets 55 ° ± 10 °, passes through
Above-mentioned setting, ensure that the light of reception is effectively divided into infrared light and visible ray by the cemented surface 211 of prism 21.If the first angle
α exceeds above range, and infrared light and visible ray are difficult to be separated.Meanwhile first between exit facet 212 and the second exit facet 213
The second angle β meet 70 ° ± 10 °, it is seen that optical transmission direction remains vertical with the first exit facet 212, infrared optical transport
Direction remains vertical with the second exit facet 213, avoids the refraction effect of visible ray and infrared light in prism 21, improves
The imaging effect of first sensitive chip 22 and the second sensitive chip 23.
According to the present invention, switching device of optical fiber 24 is set between first exit facet 212 and the first sensitive chip 22.Filtering
Infrared cut of light optical filter and polarizing filter are installed in mating plate switching device 24, infrared light can be used on daytime and night
Edge filter, can filter out remaining infrared light in visible ray by infrared cut of light optical filter, make the first sensitive chip
22 imaging clearly, so that it is guaranteed that the imaged color of the first sensitive chip 22.Certainly under daytime high light conditions, can also pass through
Polarizing filter is switched between the first exit facet 212 and the first sensitive chip 22 by switching device of optical fiber 24, so can be with
Make sky dimmed or suppress the dazzle produced on the water surface such as lake or ocean, can make the present invention by using polarizing filter
Imaging effect of the imaging system under conditions of daytime intense light irradiation it is more preferable.It can make this by using switching device of optical fiber 24
The imaging system of invention under different scenes can blur-free imaging, ensure that the present invention imaging effect, make the present invention make
It is wider with scope.Meanwhile visible ray edge filter 25 is set between the second exit facet 213 and the second sensitive chip 23, from
And remaining visible ray in infrared light is filtered, it is ensured that the brightness of image of the second sensitive chip 23 under night mode, makes second
The image quality higher of sensitive chip 23, avoids the interference of visible ray.The second exit facet 213 and the second sensitive chip 23 it
Between set visible ray edge filter 25 to also assures that the confocal effect of the first sensitive chip 22 and the second sensitive chip 23, make this
The imaging system blur-free imaging of invention.
The above is only the example of the concrete scheme of the present invention, should for the equipment and structure of wherein not detailed description
When being interpreted as taking the existing common apparatus in this area and universal method to be practiced.
The foregoing is merely the scheme of the present invention, it is not intended to limit the invention, for the technology of this area
For personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
- A kind of 1. imaging system, it is characterised in that including：Optical unit (1), including set gradually by thing side to image side the first lens group (11) with positive light coke, with negative The second lens group (12) of focal power, the 3rd lens group (13) with positive light coke and the 4th lens group with positive light coke (14)；Imaging unit (2), including prism (21), the first sensitive chip (22) for receiving visible ray and for receiving infrared light The second sensitive chip (23).
- 2. imaging system according to claim 1, it is characterised in that the optical unit (1) further includes：Diaphragm (15), the diaphragm (15) is between second lens group (12) and the 3rd lens group (13)；First driving mechanism (16), for driving second lens group (12) along optical axis in first lens group (11) and institute State and move back and forth between the 3rd lens group (13)；Second driving mechanism (17), for driving the 4th lens group (14) along optical axis in the 3rd lens group (13) and institute State and move back and forth between imaging unit (2)；3rd driving mechanism (18), the aperture of the light hole for adjusting the diaphragm (15).
- 3. imaging system according to claim 2, it is characterised in that first driving mechanism (16), described second drive Motivation structure (17) and the 3rd driving mechanism (18) are respectively manual adjustment means, and be respectively equipped with locking member (16a, 17a, 18a)。
- 4. imaging system according to claim 3, it is characterised in that first driving mechanism (16) includes：First focusing ring (161), it is described first focusing ring (161) in have and axially in parallel the first guide groove (161a)；First cylinder (162), first cylinder (162) are provided through the first helical guide groove of first cylinder (162) (162a), and first focusing ring (161) is set on the outside of first cylinder (162)；First guide pin (163), one end of first guide pin (163) respectively with the first guide groove (161a) and the first helical guide groove (162a) is slidably connected, its other end is mutually permanently connected with second lens group (12).
- 5. imaging system according to claim 3, it is characterised in that second driving mechanism (17) includes：Focusing ring (171) outside second, has in focusing ring (171) outside described second and axially in parallel the second guide groove (171a)；Second outer barrel (172), second outer barrel (172) are provided through second outer barrel (172) and along described The arc guide barrel (172a) of second outer barrel (172) circumferentially extending, and focusing ring (171) is set in described second outside described second On the outside of outer barrel (172)；Second interior focusing circle (173), have in the second interior focusing circle (173) with the 3rd axially in parallel guide groove (173a), And second outer barrel (172) is set on the outside of the second interior focusing circle (173)；Second inner cylinder (174), second inner cylinder (174) are provided through the second spiral shell of second inner cylinder (174) Revolve guide groove (174a)；Second guide pin (175), one end and the second guide groove (171a) of second guide pin (175) are connected, and are led with arc Groove (172a) is slidably connected, its other end is mutually permanently connected with the second interior focusing circle (173)；3rd guide pin (176), one end of the 3rd guide pin (176) respectively with the 3rd guide groove (173a) and the second helical guide groove (174a) is slidably connected, its other end is mutually permanently connected with the 4th lens group (14).
- 6. imaging system according to claim 3, it is characterised in that the 3rd driving mechanism (18), including：Diaphragm preselection ring (181), has in the diaphragm preselection ring (181) and axially in parallel diaphragm adjusts guide groove (181a)；Diaphragm connected nail (182), described diaphragm connected nail (182) one end adjust guide groove (181a) with the diaphragm and are connected, The other end is fixedly connected with the diaphragm (15).
- 7. imaging system according to claim 1, it is characterised in that the prism (21) includes：Cemented surface (211), has transmission visible ray on the cemented surface (211) and reflects the plated film of infrared light；First exit facet (212), first exit facet (212) is parallel with first sensitive chip (22) and is oppositely arranged；Second exit facet (213), second exit facet (213) is parallel with second sensitive chip (23) and is oppositely arranged.
- 8. imaging system according to claim 7, it is characterised in that imaging unit (2) further includes：Switching device of optical fiber (24), the switching device of optical fiber (24) are located at first exit facet (212) and described the Between one sensitive chip；Visible ray edge filter (25), the visible ray edge filter (25) are located at second exit facet (213) and institute State between the second sensitive chip (23).
- 9. imaging system according to claim 8, it is characterised in that the switching device of optical fiber (24) is electronic dress Put, and for switching infrared cut of light and polarizing filter.
- 10. imaging system according to claim 7, it is characterised in that the cemented surface (211) and the transmission side of incident light The first angle α between meets 55 ° ± 10 °.
- 11. imaging system according to claim 10, it is characterised in that first exit facet (212) and described second The second angle β between exit facet (213) meets 70 ° ± 10 °.
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|---|---|---|---|
| CN201810071902.2A CN108008516A (en) | 2018-01-25 | 2018-01-25 | A kind of imaging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810071902.2A CN108008516A (en) | 2018-01-25 | 2018-01-25 | A kind of imaging system |
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Cited By (1)
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| US11947091B2 (en) | 2019-05-30 | 2024-04-02 | Zhejiang Dahua Technology Co., Ltd. | Zoom lens and optical device having the same |
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