CN113884191B - Infrared detector and infrared imaging device - Google Patents
Infrared detector and infrared imaging device Download PDFInfo
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- CN113884191B CN113884191B CN202111132908.4A CN202111132908A CN113884191B CN 113884191 B CN113884191 B CN 113884191B CN 202111132908 A CN202111132908 A CN 202111132908A CN 113884191 B CN113884191 B CN 113884191B
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- 238000003331 infrared imaging Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 230000033001 locomotion Effects 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 43
- 230000009471 action Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 230000000670 limiting effect Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 2
- 230000004044 response Effects 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0205—Mechanical elements; Supports for optical elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0806—Focusing or collimating elements, e.g. lenses or concave mirrors
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Abstract
The invention relates to an infrared detector, which comprises a detector body, a mounting seat and a movable seat, wherein the mounting seat is provided with a movable wedge block, a wedge block driving mechanism for driving the movable wedge block to do linear motion and a guide mechanism which is connected with the movable seat to limit the movable seat to do linear motion along the direction of an optical axis; the detector body is arranged on the movable seat, a driven part which is in rolling contact or sliding contact with the wedge surface of the movable wedge block is arranged on the movable seat, and the driven motion of the driven part has decomposition motion parallel to the direction of the optical axis. In addition, the infrared imaging device adopting the infrared detector is also related. The infrared detector has a focusing function, can work by matching with a lens without the focusing function, and obviously reduces the size and the weight of the infrared imaging device; the movable wedge block is matched with the driven piece to drive the detector body to move and focus, and the detector has the advantages of simple structure, high working reliability, high focusing precision, high focusing efficiency, high response speed and the like.
Description
Technical Field
The invention relates to an infrared detector and an infrared imaging device using the same.
Background
In the infrared imaging apparatus, a focusing operation is required to ensure the sharpness of imaging. The current focusing operation generally adopts a lens adjusting mode, and the overall size of the lens is increased and the weight of the lens is increased no matter a part of lenses or a whole group of lenses are moved; and when the interchangeable lens is adopted, each lens needs to be provided with a focusing mechanism, so that the cost is high. Chinese patent CN212207933U discloses a lens focusing device and an imaging apparatus, which realize focusing by adjusting the position of a detector on an optical axis, though different from a conventional lens adjusting mode, the focusing device still adopts a traditional focusing barrel mode to perform focusing operation, and still has the problems of large overall dimension, heavy weight and the like of an infrared imaging device.
Disclosure of Invention
The invention relates to an infrared detector and an infrared imaging device adopting the infrared detector, which can at least solve part of defects in the prior art.
The invention provides an infrared detector, which comprises a detector body, a mounting seat and a movable seat, wherein the mounting seat is provided with a movable wedge block, a wedge block driving mechanism for driving the movable wedge block to do linear motion and a guide mechanism which is connected with the movable seat to limit the movable seat to do linear motion along the direction of an optical axis; the detector body is arranged on the movable seat, a driven piece is arranged on the movable seat, the driven piece is in rolling contact or sliding contact with the wedge surface of the movable wedge block, and the driven movement of the driven piece has decomposition movement parallel to the direction of the optical axis.
As one embodiment, the wedge driving mechanism comprises a transmission screw rod, a transmission nut screwed on the transmission screw rod and a driving unit connected with the transmission screw rod, and the movable wedge is connected with the transmission nut;
the driving unit drives the transmission screw rod to rotate, and under the action of external force, the transmission nut makes linear motion along the axial direction of the transmission screw rod, so that the movable wedge block is driven to make linear motion along the axial direction of the transmission screw rod.
In one embodiment, the wedge drive mechanism further includes a nut holder, the transmission nut is accommodated in the nut holder and abuts against an inner wall of the nut holder, and the movable wedge is fixed to the nut holder;
when the transmission screw rod rotates, the transmission nut drives the nut seat to do linear motion along the axial direction of the transmission screw rod.
In one embodiment, a clearance eliminating spring is provided in the nut holder, an axial direction of the clearance eliminating spring is parallel to an axial direction of the drive screw, and both ends of the clearance eliminating spring are respectively in contact with an inner wall of the nut holder and the drive nut.
In one embodiment, the mounting seat is provided with a nut guide rod, an axial direction of the nut guide rod is parallel to an axial direction of the transmission screw rod, the nut seat is provided with a nut guide sleeve, and the nut guide sleeve is sleeved on the nut guide rod.
As one embodiment, the guide mechanism includes at least one seat body guide rod, an axial direction of the seat body guide rod is parallel to the optical axis direction, the movable seat is correspondingly provided with at least one guide hole, and the seat body guide rod is arranged on the mounting seat and penetrates through the corresponding guide hole.
In one embodiment, at least a part of the seat body guide rods are sleeved with pre-tightening springs, one ends of the pre-tightening springs are abutted with the spring limiting parts, the other ends of the pre-tightening springs are abutted with the movable seat, and the positions of the spring limiting parts relative to the installation seat are kept unchanged.
As one embodiment, the infrared detector further comprises a detection mechanism for detecting the relative position between the movable seat and the mounting seat.
In one embodiment, the detection mechanism includes an optical coupler switch and a blocking piece working in cooperation with the optical coupler switch, one of the optical coupler switch and the blocking piece is installed on the installation seat, and the other member is installed on the movable seat.
The invention also provides an infrared imaging device which comprises a lens and the infrared detector, wherein the lens is arranged on the mounting seat through a lens bracket.
The invention has at least the following beneficial effects:
according to the infrared detector provided by the invention, as the mechanism capable of driving the detector body to do linear motion along the optical axis direction is configured, the infrared detector has a focusing function, can work with a lens without the focusing function, and can remarkably reduce the size and the weight of an infrared imaging device; the movable wedge block is matched with the driven piece to drive the detector body to move and focus, and the automatic focusing device has the advantages of simple structure, high working reliability, high focusing precision, high focusing efficiency, high response speed and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an infrared detector provided in an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
fig. 3 is a schematic structural diagram of an infrared imaging apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 and fig. 2, an infrared detector 1 according to an embodiment of the present invention includes a detector body 11, a mounting base 12, and a movable base 13, where the mounting base 12 is provided with a movable wedge 141, a wedge driving mechanism for driving the movable wedge 141 to move linearly, and a guiding mechanism connected to the movable base 13 to limit the movable base 13 to move linearly along an optical axis direction; the detector body 11 is installed on the movable seat 13, a driven member 142 is provided on the movable seat 13, the driven member 142 is in rolling contact or sliding contact with a wedge surface of the movable wedge 141, and the driven movement of the driven member 142 has a decomposition movement parallel to the optical axis direction.
In a specific application scenario, the movable wedge 141 has a wedge surface, the follower 142 moves on the wedge surface, and under an external force, the follower 142 can move along the wedge surface, taking the view angle of fig. 1 as an example, when the movable wedge 141 moves horizontally to the right, the follower 142 receives a resolving force in the optical axis direction, so as to drive the movable seat 13 to move upwards along the optical axis, so as to reduce the distance between the detector body 11 and the lens; when the movable wedge 141 moves horizontally to the left, the follower 142 is subjected to a downward acting force along the optical axis, so as to drive the movable seat 13 to move downward along the optical axis, so as to increase the distance between the detector body 11 and the lens.
The probe body 11 is a conventional device in the art, and the detailed structure thereof is not described herein. In one embodiment, the movable seat 13 also has a function of dissipating heat from the probe body 11, that is, a heat dissipation mechanism is disposed on the movable seat 13, and any device suitable for dissipating heat from a probe in the prior art is suitable for use in this embodiment. The optical axis direction is based on the probe body 11, which can be easily determined by those skilled in the art, and is generally perpendicular to the surface of the probe body 11 when the probe body 11 is a plane probe, and is generally parallel to the vertical direction when the probe body 11 is horizontally disposed.
In one embodiment, the mounting base 12 is provided with a movable groove for accommodating the movable base 13, so that the volume and the occupied space of the infrared detector 1 can be reduced correspondingly; in addition, the groove depth direction of the movable groove is parallel to the optical axis direction, optionally, the groove wall of the movable groove is matched with the side wall of the movable seat 13, so that the linear motion of the movable seat 13 can be guided and limited, and the running stability of the movable seat 13 can be correspondingly improved.
The guide mechanism is used for guiding the linear motion of the movable seat 13, and can prevent the movable seat 13 from generating motion in other directions due to the driving of the movable wedge 141 under the constraint action of the guide mechanism, so that the accuracy and the reliability of the focusing operation are ensured. The guide mechanism can adopt a conventional guide mode, such as a slide block-slide rail matching type guide mechanism or a guide column-guide sleeve matching type guide mechanism.
As shown in fig. 1 and fig. 2, in the present embodiment, the guide mechanism includes at least one seat body guide rod 161, an axial direction of the seat body guide rod 161 is parallel to the optical axis direction, at least one guide hole (not shown) is correspondingly disposed on the movable seat 13, and the seat body guide rod 161 is disposed on the mounting seat 12 and penetrates through the corresponding guide hole; under the constraint and guide action of the holder body guide rod 161, the movable holder 13 moves along the optical axis direction. In a preferred embodiment, in order to reduce friction, a guiding mechanism of a guiding post-guiding sleeve combination type is adopted, that is, the guiding mechanism further includes at least one seat guiding sleeve (not shown), the seat guiding sleeve is disposed on the seat guiding rod 161, the seat guiding sleeve is fixed relative to the guiding hole, and the seat guiding sleeve moves along the optical axis direction relative to the seat guiding rod 161 under the action of external force.
Based on the above scheme, further, at least part of the seat body guide rod 161 is sleeved with a pre-tightening spring 162, one end of the pre-tightening spring 162 abuts against the spring limiting part, and the other end of the pre-tightening spring 162 abuts against the movable seat 13, wherein the position of the spring limiting part relative to the installation seat is kept unchanged; in an alternative embodiment, a spring position-limiting portion is disposed on the seat body guide rod 161, and for the arrangement of the spring position-limiting portion, for example, the seat body guide rod 161 adopts a stepped shaft type guide rod, and a stepped surface thereof can be configured as the spring position-limiting portion, although it is feasible to arrange a spring baffle plate on the seat body guide rod 161; in another embodiment, when the lens holder 22/shutter holder 32 is connected to the front end of the infrared detector 1, the lens holder 22/shutter holder 32 may serve as the spring stopper, i.e., one end of the pre-tightening spring 162 abuts against the lens holder 22/shutter holder 32. The pre-tightening spring 162 is preferably located on the outer side of the movable seat 13 (i.e. the side of the movable seat 13 close to the lens 21), and by providing the pre-tightening spring 162, the pre-tightening spring 162 is kept in a pressed state during the movement of the movable seat 13, and under the elastic force of the pre-tightening spring 162, the driven member 142 can be ensured to be kept in contact with the wedge surface of the movable wedge 141, the interference of other factors (such as gravity and the like) is eliminated, and the accuracy and reliability of the adjustment operation are ensured. Of course, the pre-tightening spring 162 may not be sleeved on the seat body guide rod 161, and it is also feasible to additionally provide a spring guide post on the mounting seat 12, and the specific structure will not be described in detail here.
In one embodiment, as shown in fig. 1 and 2, each seat body guide rod 161 includes a main guide rod and an auxiliary guide rod; in the guiding hole that sets up on sliding seat 13, including the main guiding hole with main guide bar complex and the supplementary guiding hole with supplementary guide bar complex, wherein, optionally, main guiding hole adopts the axial length that relatively great, and it can guarantee the direction effect with main guide bar cooperation, and supplementary guiding hole adopts the axial length that relatively less to establish pretension spring 162 on supplementary guiding rod. Furthermore, the number of the auxiliary guide rods can be two or more, so that the guide effect is better, for example, two auxiliary guide rods are adopted and are respectively arranged on two sides of the main guide rod; in particular, when the movable seat 13 is a square seat, the auxiliary guide bush can be provided at the corner of the movable seat 13, and the movement stability of the movable seat 13 can be improved accordingly.
The follower 142 is preferably provided on the side of the movable seat 13; the follower 142 may be a roller, and the follower 142 is in rolling contact with the movable wedge 141, and the follower 142 may also be a slider, and preferably, a wedge-shaped slider adapted to a wedge surface of the movable wedge 141 is adopted, so that the follower 142 is in sliding contact with the movable wedge 141.
The movable wedge 141 is driven by the wedge driving mechanism to move linearly, and under the cooperation of the movable wedge 141 and the driven member 142 and the constraint action of the guiding mechanism, the movable seat 13 can move linearly along the optical axis direction, so that the relative distance between the detector body 11 and the lens 21 is adjusted, and the purpose of focusing is also achieved. In the infrared detector 1 provided by this embodiment, since the mechanism capable of driving the detector body 11 to move linearly along the optical axis direction is configured, the infrared detector has a focusing function, can work with the lens 21 without a focusing function, and can significantly reduce the size and weight of the infrared imaging device; the movable wedge block 141 and the driven part 142 are matched to drive the detector body 11 to move and focus, and the automatic focusing device has the advantages of simple structure, high working reliability, high focusing precision, high focusing efficiency, high response speed and the like.
Preferably, as shown in fig. 1 and 2, the wedge driving mechanism includes a driving screw 152, a driving nut 153 screwed on the driving screw 152, and a driving unit 151 connected to the driving screw 152, and the movable wedge 141 is connected to the driving nut 153. The driving unit 151 drives the driving screw 152 to rotate, so that the driving nut 153 moves linearly along the axial direction of the driving screw 152, and further drives the movable wedge 141 to move linearly along the axial direction of the driving screw 152. The lead screw mechanism is adopted for transmission, the working reliability is high, and a relatively large driving stroke can be obtained in a limited space, so that the size of equipment can be effectively reduced under the condition of meeting the focusing operation requirement, and the miniaturization design of the infrared imaging device is facilitated.
The above-described drive unit 151 is preferably an automatic drive device, capable of realizing automatic focusing, and capable of obtaining high focusing accuracy. In one embodiment, the driving unit 151 includes a driving motor, a driving gear assembled with an output shaft of the driving motor, and a transmission gear fixed on the transmission screw 152 and engaged with the driving gear. Of course, other rotary drive devices are also suitable for use in this embodiment.
Further preferably, as shown in fig. 1 and 2, the wedge driving mechanism further includes a nut holder 154, the transmission nut 153 is accommodated in the nut holder 154 and abuts against an inner wall of the nut holder 154, the movable wedge 141 is fixed to the nut holder 154, and the movable wedge 141 and the nut holder 154 may be integrally formed or may be separately connected. Accordingly, a relief hole is formed in the nut seat 154 to allow the transmission screw 152 to pass through, and the diameter of the relief hole is preferably larger than that of the transmission screw 152, so as to prevent the transmission screw 152 from contacting the nut seat 154 to interfere with the normal operation of the screw mechanism. Further, a nut guide rod 155 is arranged on the mounting base 12, the axial direction of the nut guide rod 155 is parallel to the axial direction of the transmission screw 152, a nut guide sleeve is arranged on the nut base 154, the nut guide sleeve is sleeved on the nut guide rod 155, and the translational motion of the nut base 154 is guided by the nut guide rod 155, so that the stability of the linear motion of the movable wedge block 141 can be ensured.
In a further preferred aspect, as shown in fig. 1 and 2, a gap-eliminating spring 156 is provided in the nut holder 154, an axial direction of the gap-eliminating spring 156 is parallel to an axial direction of the driving screw 152, and both ends of the gap-eliminating spring 156 abut against an inner wall of the nut holder 154 and the driving nut 153, respectively. The gap eliminating spring 156 is preferably disposed on the driving screw 152, and has one end fixed to the inner wall of the nut seat 154 and the other end in abutting contact with the driving nut 153, or has one end fixed to the driving nut 153 and the other end in abutting contact with the inner wall of the nut seat 154. Through the clearance eliminating spring 156, under the action of the elastic force, the influence caused by the thread clearance between the transmission nut 153 and the transmission screw rod 152 can be reduced or even eliminated, so that the displacement accuracy of the movable wedge block 141 is ensured, and the focusing precision is effectively improved.
Further preferably, the infrared detector 1 further comprises a detection mechanism for detecting the relative position between the movable seat 13 and the mounting seat 12, and the detection mechanism can monitor whether the movable seat 13 is driven in place in real time, that is, whether focusing is accurate, and through the interlocking fit of the detection mechanism and the wedge block driving mechanism, the automatic control of focusing operation can be realized, and the focusing precision is improved. The automation control involved therein is a conventional automation control mode, no additional programming is needed, and the method is easy to realize by a person skilled in the art. In one embodiment, the detection mechanism includes an optical coupling switch 171 and a catch 172 working with the optical coupling switch 171, one of the optical coupling switch 171 and the catch 172 is mounted on the mounting base 12, and the other member is mounted on the movable base 13; when the movable seat 13 moves relative to the mounting seat 12, relative movement can be generated between the blocking piece 172 and the optical coupler switch 171, and by means of the triggering action of the blocking piece 172 (when the blocking piece 172 is positioned between the light emitting end and the light receiving end of the optical coupler switch 171, the optical coupler switch 171 is in an off state, otherwise, the optical coupler switch 171 is in an on state), two limit positions of the detector body 11 can be detected, and the device is prevented from being damaged due to focusing errors; when an encoder is further provided on the drive motor, the amount of movement of the movable base 13 can be accurately calculated to ensure focusing accuracy.
In an actual application scene, the infrared detector further comprises a control unit, the control unit is connected with the driving unit, the control unit determines a focusing condition according to an actual imaging effect, and sends a corresponding control instruction to the driving unit according to the focusing condition so as to continuously adjust the distance between the detector body and the lens until the imaging effect meets a condition set by a user.
Specifically, the control unit determines the moving direction and the moving distance D of the detector body according to the actual imaging effect, determines the moving distance L of the movable wedge block along the transmission screw rod according to the moving distance D and the inclination angle theta of the movable wedge block, and determines the adjusting step of the driving unit according to the distance D, so that a control instruction is generated according to the moving direction and the adjusting step. The driving unit drives the transmission screw rod to rotate based on a control instruction, and then drives the movable wedge block to move for a corresponding distance along the transmission screw rod, so that automatic focusing is achieved, wherein the movable wedge block comprises a wedge surface and a bottom surface, the bottom surface is parallel to an axis of the transmission screw rod, and the inclination angle refers to an included angle between the wedge surface and the bottom surface. Example two
Referring to fig. 3, an infrared imaging apparatus according to an embodiment of the present invention includes a lens 21 and the infrared detector 1 according to the first embodiment, where the lens 21 is mounted on the mounting base 12 through a lens holder 22. The detailed structure of the infrared detector 1 will not be described herein.
Further, as shown in fig. 3, the infrared imaging device may further include a shutter 31, and the shutter 31 is mounted on the mounting base 12 through a shutter bracket 32. The structure of the shutter 31, the lens 21 and the body of the infrared detector 1 is conventional in the art, and will not be described herein.
Further, as shown in fig. 3, the infrared imaging apparatus further includes a circuit board 41, and the circuit board 41 may be mounted on the mounting base 12 through a circuit board bracket 42, for example, on a side of the mounting base 12 away from the lens 21. The probe body 11, the wedge drive mechanism, and the like can be electrically connected to the circuit board 41.
The focusing process of the infrared imaging device is approximately as follows:
the driving screw 152 is driven to rotate by the driving unit 151 (for example, a driving motor), and based on the matching relationship between the driving screw 152 and the driving nut 153, the driving nut 153 correspondingly moves linearly and drives the movable wedge 141 to move linearly; based on the matching relationship between the movable wedge 141 and the driven member 142 and under the limiting action of the guiding mechanism, the driven member 142 can drive the movable seat 13 and the detector body 11 arranged on the movable seat 13 to make linear motion in the optical axis direction, so as to adjust the distance between the detector body 11 and the lens 21 and achieve the purpose of focusing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An infrared detector, includes the detector body, its characterized in that: the mounting base is provided with a movable wedge block, a wedge block driving mechanism for driving the movable wedge block to do linear motion and a guide mechanism which is connected with the movable base to limit the movable base to do linear motion along the direction of an optical axis; the detector body is arranged on the movable seat, a driven piece is arranged on the movable seat and is in rolling contact or sliding contact with a wedge surface of the movable wedge block, and the driven motion of the driven piece has decomposition motion parallel to the direction of an optical axis;
the wedge block driving mechanism comprises a nut seat, a transmission screw rod and a transmission nut screwed on the transmission screw rod, the transmission nut is accommodated in the nut seat and is abutted against the inner wall of the nut seat, and the movable wedge block is fixed on the nut seat; when the transmission screw rod rotates, the transmission nut drives the nut seat to do linear motion along the axial direction of the transmission screw rod.
2. An infrared detector as set forth in claim 1, wherein: the wedge block driving mechanism also comprises a driving unit connected with the transmission screw rod,
the driving unit drives the transmission screw rod to rotate, and under the action of external force, the transmission nut makes linear motion along the axial direction of the transmission screw rod, so that the movable wedge block is driven to make linear motion along the axial direction of the transmission screw rod.
3. The infrared detector as set forth in claim 1, wherein: and a gap eliminating spring is arranged in the nut seat, the axial direction of the gap eliminating spring is parallel to the axial direction of the transmission screw rod, and two ends of the gap eliminating spring are respectively abutted against the inner wall of the nut seat and the transmission nut.
4. The infrared detector as set forth in claim 1, wherein: the nut guide rod is arranged on the mounting seat, the axial direction of the nut guide rod is parallel to the axial direction of the transmission screw rod, the nut seat is provided with a nut guide sleeve, and the nut guide sleeve is sleeved on the nut guide rod.
5. The infrared detector as set forth in claim 1, wherein: the guide mechanism comprises at least one seat body guide rod, the axial direction of the seat body guide rod is parallel to the direction of the optical axis, at least one guide hole is correspondingly arranged on the movable seat, and the seat body guide rod is arranged on the mounting seat and penetrates through the corresponding guide hole.
6. An infrared detector as defined in claim 5, wherein: at least part of the seat body guide rods are sleeved with pre-tightening springs, one ends of the pre-tightening springs are abutted to the spring limiting parts, the other ends of the pre-tightening springs are abutted to the movable seat, and the positions of the spring limiting parts relative to the mounting seat are kept unchanged.
7. The infrared detector as set forth in claim 1, wherein: the device also comprises a detection mechanism for detecting the relative position between the movable seat and the mounting seat.
8. An infrared detector as set forth in claim 7, wherein: the detection mechanism comprises an optical coupling switch and a separation blade matched with the optical coupling switch for working, one of the optical coupling switch and the separation blade is arranged on the mounting seat, and the other component is arranged on the movable seat.
9. An infrared imaging device, includes the camera lens, its characterized in that: further comprising an infrared detector as claimed in any of claims 1 to 8, said lens being mounted on said mount by a lens holder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132908.4A CN113884191B (en) | 2021-09-27 | 2021-09-27 | Infrared detector and infrared imaging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111132908.4A CN113884191B (en) | 2021-09-27 | 2021-09-27 | Infrared detector and infrared imaging device |
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| CN113884191B true CN113884191B (en) | 2023-01-24 |
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| KR100420741B1 (en) * | 1998-10-13 | 2004-03-02 | 세이코 엡슨 가부시키가이샤 | Micromachine and method of manufacturing the same |
| CN102590974B (en) * | 2011-01-14 | 2014-02-19 | 上海微电子装备有限公司 | Position fine adjustment device and objective lens adopting same |
| CN110392190B (en) * | 2018-04-20 | 2021-07-20 | 杭州海康微影传感科技有限公司 | Focusing device and thermal infrared imager |
| CN111024241B (en) * | 2019-11-28 | 2021-10-15 | 天津津航技术物理研究所 | Refrigeration type infrared detection system |
| CN212207933U (en) * | 2020-01-17 | 2020-12-22 | 武汉高德智感科技有限公司 | Lens focusing device and imaging equipment |
| CN112946857B (en) * | 2021-03-15 | 2023-02-21 | 东莞先导先进科技有限公司 | Infrared detector module with automatic focusing and resetting correction functions |
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