CN118284356A

CN118284356A - Endoscope camera and endoscope imaging system

Info

Publication number: CN118284356A
Application number: CN202280072014.7A
Authority: CN
Inventors: 曾强; 胡莲; 石强勇; 徐涛
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2024-07-02
Also published as: WO2023178672A1; WO2023179121A1

Abstract

An endoscope camera and an endoscope camera system, wherein the endoscope camera comprises an optical module, a chip module, a driving device, a hand wheel and a detection device, the detection device comprises a trigger piece and a detection piece, the trigger piece is arranged on the hand wheel, and the detection piece is electrically connected with the chip module; the detection piece is used for detecting a trigger piece which rotates along with the hand wheel and generating a corresponding detection signal, the chip module calculates the rotation direction and/or rotation angle of the hand wheel according to the detection signal, and the chip module controls the driving device to drive the adjustable optical assembly to move according to the calculation result so as to realize zooming or focusing adjustment. Due to the fact that the detection device is arranged, the detection device is used for detecting the rotation direction and the rotation angle of the hand wheel, the driving device drives the optical module to zoom or focus, the hand wheel is a non-direct driving piece, rotation limitation of the hand wheel is relieved, the hand wheel can be rotated at will to indirectly drive zooming or focusing adjustment, the using sense of hand is improved, and the range of zooming or focusing adjustment is increased.

Description

Endoscope camera and endoscope imaging system

Technical Field

The invention relates to the technical field of medical equipment, in particular to an endoscope camera and an endoscope camera system.

Background

The hard tube endoscope is mainly used for diagnosing and/or treating natural cavity tracts of superficial and shallow parts of human body and focus through puncturing the open cavity tracts, such as cystoscope and hysteroscope, and is inflexible in operation.

The hard tube endoscope mainly comprises a camera, a light source, a light guide beam, a hard tube endoscope, an optical bayonet, a camera host and a display. The camera comprises an optical module and a hand wheel, and the hand wheel is used for driving the zooming of the optical module. At present, the optical module is provided with a spiral groove, a hand wheel is connected with the spiral groove, and the hand wheel drives the optical module to axially move through the spiral groove so as to realize zooming. But the camera axial space is limited, and the length of the spiral groove is limited, so that the rotation angle of the hand wheel is limited, and the focusing use of the camera is affected.

Technical problem

Technical solution

An embodiment provides an endoscopic camera head, comprising:

the optical module comprises a lens barrel, a fixed optical component and an adjustable optical component, wherein the fixed optical component is fixedly arranged in the lens barrel, and the adjustable optical component is axially movably arranged in the lens barrel;

the chip module comprises a shell and a chip assembly, wherein the shell is connected with the lens barrel, and the chip assembly is arranged in the shell;

the driving device is provided with an output end and an electric connection end, the output end is connected with the adjustable optical component, and the electric connection end is electrically connected with the chip component;

The hand wheel is rotatably arranged on the lens cone; and

The detection device comprises a trigger piece and a detection piece, wherein the trigger piece is arranged on the hand wheel, the detection piece is electrically connected with the chip assembly, the detection piece is provided with a detection end, and the detection end is arranged towards the trigger piece; the detection piece is used for detecting the trigger piece which rotates along with the hand wheel and generating corresponding detection signals, the chip module calculates the rotation direction and/or rotation angle of the hand wheel according to the detection signals, and the chip module controls the driving device to drive the adjustable optical assembly to move according to the calculation result so as to realize zooming or focusing adjustment.

In one embodiment, the triggering piece is provided with a triggering area and a non-triggering area, and the triggering areas and the non-triggering areas are alternately arranged on a circumference, and the triggering areas and the non-triggering areas are used for triggering the detecting piece to form a pulse signal.

In one embodiment, the trigger zone and the non-trigger zone span the same central angle.

In one embodiment, the pulse signals include a first pulse signal and a second pulse signal having a phase difference, and the chip module calculates the rotation direction and the rotation angle of the hand wheel according to the first pulse signal and the second pulse signal.

In one embodiment, the phase difference between the first pulse signal and the second pulse signal is 90 °.

In one embodiment, the detecting member is configured to emit and receive the detection light, and the triggering member is configured to reflect or transmit the detection light to trigger the detecting member to generate the pulse signal.

In one embodiment, the detecting element includes a transmitting end and a receiving end, the transmitting end of the detecting element is used for transmitting detecting light, the receiving end of the detecting element is used for receiving the detecting light, and the detecting element generates the pulse signal according to the transmitted and received detecting light.

In one embodiment, the triggering element is a grating code wheel, and the grating code wheel is provided with an alternate light reflecting area and a light absorbing area, wherein the light reflecting area is the triggering area, and the light absorbing area is the non-triggering area.

In an embodiment, the detecting element includes a photoelectric coding chip, the photoelectric coding chip includes a transmitting end and a receiving end, the transmitting end and the receiving end of the photoelectric coding chip are located on the same side of the grating code disc, the transmitting end of the photoelectric coding chip is used for transmitting detection light, the receiving end of the photoelectric coding chip is used for receiving the detection light reflected by the light reflection area, and the photoelectric coding chip generates the pulse signal according to the transmitted and received detection light.

In one embodiment, the detection member includes a photoelectric encoding chip, and the photoelectric encoding chip includes a first transmitting end, a first receiving end, a second transmitting end, and a second receiving end; the first transmitting end and the first receiving end of the photoelectric coding chip are positioned on the same side of the grating code disc, the first transmitting end of the photoelectric coding chip is used for transmitting first detection light, the first receiving end of the photoelectric coding chip is used for receiving the first detection light reflected by the light reflecting area, and the photoelectric coding chip generates a first pulse signal according to the transmitted and received first detection light; the second transmitting end and the second receiving end of the photoelectric coding chip are positioned on the same side of the grating code disc, the second transmitting end of the photoelectric coding chip is used for transmitting second detection light, the second receiving end of the photoelectric coding chip is used for receiving the second detection light reflected by the light reflecting area, and the photoelectric coding chip generates a second pulse signal according to the transmitted and received second detection light.

In an embodiment, the detecting element includes a first photoelectric coding chip and a second photoelectric coding chip, where the first photoelectric coding chip includes a first transmitting end and a first receiving end, the first transmitting end and the first receiving end of the first photoelectric coding chip are located on the same side of the grating code disc, the first transmitting end of the first photoelectric coding chip is used to transmit first detection light, the first receiving end of the first photoelectric coding chip is used to receive the first detection light reflected by the light reflection area, and the first photoelectric coding chip is used to generate a first pulse signal according to the transmitted and received first detection light; the second photoelectric coding chip comprises a second transmitting end and a second receiving end, the second transmitting end and the second receiving end of the second photoelectric coding chip are positioned on the same side of the grating code disc, the second transmitting end of the second photoelectric coding chip is used for transmitting second detection light, the second receiving end of the second photoelectric coding chip is used for receiving the second detection light reflected by the reflecting area, and the second photoelectric coding chip is used for generating a second pulse signal according to the transmitted and received second detection light.

In one embodiment, the grating code disc is in an annular flat plate structure, and the light reflecting area and the light absorbing area are located in an annular plane.

In one embodiment, the triggering element is an annular disc, and a plurality of raised strips uniformly distributed on a circumference are arranged on the annular disc, the raised strips are the triggering areas, and the gap areas between the raised strips are the non-triggering areas.

In one embodiment, the triggering member is an annular disc, a plurality of strip-shaped holes are uniformly distributed on the circumference of the annular disc, the strip-shaped holes are the non-triggering areas, and the area between the strip-shaped holes is the triggering area.

In one embodiment, the detecting element includes a photoelectric switch, where the photoelectric switch includes an emitting end and a receiving end, the emitting end and the receiving end of the photoelectric switch are located at two sides of the trigger area, the emitting end of the photoelectric switch is used to emit detection light, the receiving end of the photoelectric switch is used to receive the detection light reflected by the trigger area, and the photoelectric switch generates the pulse signal according to the emitted and received detection light.

In an embodiment, the detecting element includes a first photoelectric switch and a second photoelectric switch, where the first photoelectric switch includes a first transmitting end and a first receiving end, the first transmitting end and the first receiving end of the first photoelectric switch are located at two sides of the trigger area, the first transmitting end of the first photoelectric switch is used to transmit first detection light, the first receiving end of the first photoelectric switch is used to receive the first detection light transmitted by the non-trigger area, and the first photoelectric switch generates a first pulse signal according to the transmitted and received first detection light; the second photoelectric switch comprises a second transmitting end and a second receiving end, the second transmitting end and the second receiving end of the second photoelectric switch are respectively positioned on two sides of the trigger area, the second transmitting end of the second photoelectric switch is used for transmitting second detection light, the second receiving end of the second photoelectric switch is used for receiving the second detection light transmitted by the non-trigger area, and the second photoelectric switch generates a second pulse signal according to the transmitted and received second detection light.

In one embodiment, the lens barrel is provided with a mounting seat, the detecting piece is mounted on the mounting seat, the lens barrel is further provided with a threading hole, and the threading hole is used for threading a connecting wire between the detecting piece and the chip module.

In one embodiment, the optical path environment of the optical module is separated from the optical path environment of the detection device.

In one embodiment, a light shielding member is disposed between the optical module and the detecting device.

In one embodiment, the hand wheel has an axial annular groove and the detection means is located within the annular groove of the hand wheel.

In one embodiment, the opening of the annular groove is provided with a seal for sealing the detection device within the annular groove.

In one embodiment, an endoscopic camera is provided, comprising:

the optical module is used for acquiring optical image information of a target part and providing a transmission light path for the optical image information;

The chip module is connected with the optical module and is used for receiving the optical image information transmitted by the optical module and converting the optical image information into an electric signal;

The operation piece is connected with the optical module and is used for adjusting parameters of the optical module according to the operation of a user;

The detection device comprises a trigger piece and a detection piece, wherein the trigger piece is arranged on the operation piece and moves together with the operation piece according to the operation of the user; the detection piece is used for emitting a first detection signal, acquiring a second detection signal formed by reflecting or transmitting the first detection signal by the trigger piece, and determining the operation amount of the user on the operation piece based on the second detection signal.

In one embodiment, the first detection signal and the second detection signal are optical signals.

In one embodiment, the detection device includes a photoelectric encoder, the trigger piece includes a grating code disc of the photoelectric encoder, the detection piece includes a photoelectric encoding chip of the photoelectric encoder, and the photoelectric encoding chip is used for transmitting the first detection signal and receiving the second detection signal, and determining the operation amount of the user on the operation piece based on the second detection signal.

In one embodiment, the operation member is a focusing handwheel, and is used for rotating according to the operation of a user to adjust the imaging focal length of the optical module.

In one embodiment, an endoscope camera system is provided, comprising a light source, a light guide beam, an endoscope, an optical bayonet, a communication cable, a camera host, a display, a video connection line, and the endoscope camera head according to any one of claims 1 to 25, wherein the light source is connected with the endoscope through the light guide beam, one end of the endoscope camera head is connected with the endoscope through the optical bayonet, the other end of the endoscope camera head is connected with the camera host through the communication cable, and the camera host is connected with the display through the video connection line.

Advantageous effects

According to the endoscope camera and the endoscope camera system, the detection device is arranged on the endoscope camera and is used for detecting the rotation direction and the rotation angle of the hand wheel, the driving device drives the optical module to perform zooming or focusing adjustment, the hand wheel is a non-direct driving piece, the rotation restriction of the hand wheel is relieved, the hand wheel can be rotated at will to indirectly drive zooming or focusing adjustment, the using feeling is greatly improved, and the range of zooming or focusing adjustment is enlarged.

Drawings

FIG. 1 is a schematic diagram of an endoscopic camera in one embodiment;

FIG. 2 is a partial axial cross-sectional view of an endoscopic camera in one embodiment;

FIG. 3 is a partial perspective cross-sectional view of an endoscopic camera in one embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 2 at A;

FIG. 5 is a schematic diagram of the structure of a trigger (grating code wheel) in one embodiment;

FIG. 6 is a schematic structural diagram of a detecting member (photoelectric encoding chip) in one embodiment;

FIG. 7 is a partial schematic view of a grating disk in an embodiment;

FIG. 8 is a schematic diagram of a first pulse signal and a second pulse signal according to one embodiment;

FIG. 9 is a schematic diagram of a detection device according to an embodiment;

FIG. 10 is a schematic diagram of the structure of a detecting member (photoelectric switch) in one embodiment;

Fig. 11 is a schematic diagram of an endoscopic imaging system in an embodiment.

Embodiments of the invention

The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. Front end in this context means the end closer to the patient and rear end the end farther from the patient.

In one embodiment, an endoscope camera is provided, the endoscope camera adopts an indirect driving mode to realize zooming or focusing adjustment, a hand wheel is used as a reference target, a detection device and a driving device are added, the detection device is used for monitoring the operation amount of rotating the hand wheel by a user, and then the driving device is controlled to drive the optical module to move to zoom or focus according to the operation amount.

Referring to fig. 1 and 2, the endoscope camera of the present embodiment mainly includes an optical module 1, a chip module 2, a driving device 3, a hand wheel 4, a detecting device 5 and a handle 6.

The rear end of the optical module 1 is inserted and installed in the cavity of the handle 6, and the optical module 1 is used for acquiring optical image information of a target part and providing a transmission light path for the optical image information. The optical module 1 comprises a lens barrel 11, a fixed optical component 12 and an adjustable optical fiber component 13, wherein the front end of the lens barrel 11 is used for being connected with an optical bayonet 7, and the rear end of the lens barrel 11 is connected with the chip module 2. The fixed optical component 12 is fixedly installed in the lens barrel 11, and the fixed optical component 12 comprises a fixed lens base and fixed lenses, wherein one or more fixed lenses are installed in the fixed lens base. The adjustable optical fiber assembly 13 is disposed in the lens barrel 11, and the adjustable optical fiber assembly 13 can move axially relative to the fixed optical assembly 12 to achieve zooming or focusing imaging. The adjustable optical fiber assembly 13 comprises an adjustable lens seat and an adjustable lens, wherein one or more adjustable lenses are arranged in the adjustable lens seat, and the adjustable lens seat and the adjustable lens serve as an integral structure and move axially together.

The chip module 2 is installed in the cavity of the handle 6, and the chip module 2 is used for receiving the optical image information transmitted by the optical module 1 and converting the optical image information into an electric signal. The chip module 2 is further connected with the driving device 3 and the detecting device 5, and the chip module 2 is used for acquiring a detecting signal and controlling the driving device 3 to drive the optical module 1 to zoom or focus according to the detecting signal.

The chip module 2 mainly comprises a shell 21 and a chip assembly 22, wherein the front end of the shell 21 is connected with the rear end of the lens barrel 11 through the front cover 8, and the rear end of the lens barrel 11 is in butt joint with the shell 21. The chip assembly 22 is mounted in the housing 21 by a bracket, and the chip assembly 22 is aligned with the fixed optical assembly 12 and the adjustable optical fiber assembly 13 along the optical axis so that optical signals transmitted by the fixed optical assembly 12 and the adjustable optical fiber assembly 13 can be radiated into the chip assembly 22.

The driving device 3 comprises a motor 31, a screw 32 and a sliding block 33, the driving device 3 is arranged in the shell 21, and the driving device 3 is connected with the shell 21 through a fixing frame. The motor 31 is a stepping motor, the screw rod 32 is connected with an output shaft of the motor 31, the sliding block 33 is provided with a threaded hole and a through hole, the sliding block 33 is axially movably connected to the screw rod 32 through the threaded hole, and the sliding block 33 is connected with the adjustable optical fiber assembly 13. The forward and reverse rotation of the motor 31 is used to drive the slider 33 to move forward or backward in the axial direction, so that the driving device 3 can drive the adjustable optical fiber assembly 13 to move precisely in the axial direction.

In other embodiments, the driving device 3 comprises a linear motor, and the output end of the linear motor is directly connected with the adjustable optical fiber assembly 13, so that the axial precise adjustment of the adjustable optical fiber assembly 13 can be realized.

In other embodiments, the driving device 3 is located in the housing 21, the driving device 3 is connected to the lens barrel 1, and the lens barrel 1 supports and fixes the driving device 3.

In this embodiment, the motor 31 is electrically connected to the chip assembly 22, and the chip assembly 22 is used for controlling the rotation number and rotation direction of the motor 31.

The hand wheel 4 is an operation piece, the hand wheel 4 is a focusing hand wheel, and the hand wheel 4 rotates according to the operation of a user so as to indirectly adjust the imaging focal length of the optical module 1.

Referring to fig. 3 and 4, the hand wheel 4 is rotatably sleeved on the lens barrel 11, and the hand wheel 4 can rotate forward and backward at any 360 ° relative to the lens barrel 11. The hand wheel 4 is of an annular structure, an annular groove 41 is formed in the axial rear side face of the hand wheel 4, the hand wheel 4 is provided with a step groove, and the step groove of the hand wheel 4 and the lens barrel 11 are enclosed to form the annular groove 41. An annular recess 41 may also be provided in the middle of the handwheel 4, the annular recess 41 being adapted to receive the detection device 5. The detecting device 5 is used for detecting the operation amount of the hand wheel 4, namely, the rotation angle and the rotation direction of the hand wheel 4.

The sealing piece 42 is arranged at the rear end opening of the annular groove 41 of the hand wheel 4, and the detection device 5 is sealed in the annular groove 41 by the sealing piece 42 so as to realize the protection of the detection device 5, and the light detection of external light to the detection device 5 can be avoided.

The detection device 5 includes various forms, and the detection device 5 includes a contact type detection device and a non-contact type detection device.

The touch detection device comprises a conductive disc and a probe, wherein the conductive disc is arranged on the hand wheel 4, and the conductive disc is provided with alternating conductive areas and non-conductive areas or alternating high-resistance areas and low-resistance areas. In the process that the conductive disc rotates along with the hand wheel 4, the conductive needle is contacted with the alternating conductive area and the non-conductive area to form a pulse signal, the operation amount of the hand wheel 4 can be calculated through the pulse signal, and the focusing parameter of the chip module 2 is adjusted according to the operation amount.

The non-contact detection device comprises a photoelectric detection device and a magnetic induction detection device, wherein the photoelectric detection device detects through detection light, and the magnetic induction detection device detects through magnetic change.

The photoelectric detection comprises a trigger piece and a detection piece, wherein the trigger piece is arranged on the hand wheel 4, and the trigger piece is provided with an alternate light reflecting area and a light absorbing area or an alternate light transmitting area and a light shielding area. The detection piece can emit light and receive light, the detection piece is through emitting light to the trigger piece, the trigger piece rotates the in-process along with the hand wheel 4, the detection piece will emit light to reflection of light district and extinction district, or emit light to the printing opacity district and extinction district, the detection piece receives pulse reflection light or transmission light, forms pulse signal, can calculate the operation volume of hand wheel 4 through pulse signal.

The magnetic induction detection device comprises a trigger piece and a detection piece, wherein the trigger piece is arranged on the hand wheel 4, the trigger piece is an annular magnet, the trigger piece is provided with alternating N regions and S regions, the detection piece is configured to detect magnetic fields, the trigger piece senses different magnetic field changes along with the rotation of the hand wheel 4, a pulse signal is formed, and the operation quantity of the hand wheel 4 can be calculated through the pulse signal.

The detection device 5 in this embodiment adopts a non-contact photoelectric detection device, and compared with a contact detection device, the non-contact detection device has the advantages of higher detection precision, longer service life and the like, and the contact detection device has a lower service life and is easy to generate a false touch phenomenon. Compared with a magnetic induction detection device, the photoelectric detection device has the advantages of low interference, high detection precision and the like, the magnetic induction detection device is easily influenced by an environment magnetic field, and particularly in the application of the detection of the aging density, the smaller environment magnetic field can cause larger detection errors.

Referring to fig. 5 and 6, the detecting device 5 in the present embodiment is a photoelectric encoding detecting device, the detecting device 5 includes a triggering member 51 and a detecting member 52, the triggering member 51 is a grating code disc with an annular structure, and the triggering member 51 is fixed in the annular groove 41 of the hand wheel 4 by bonding or other manners. The other surface of the triggering piece 51 opposite to the bonding surface is provided with a triggering area and a non-triggering area which are alternately arranged, the triggering area is a light reflecting area 511, the non-triggering area is a light absorbing area 512, and the light reflecting area 511 and the light absorbing area 512 have the same central angle in span, namely the sector area of the grating holes is equal to the area between the grating holes in shape and size.

The hand wheel 4 is made of rubber, the grating code disc is made of metal, the grating holes of the grating code disc are light absorption areas 512, and the metal areas between the grating holes of the grating code disc are light reflection areas 511. The light absorption layer is attached to the surface, connected with the grating code disc, of the hand wheel 4, the light reflection layer with holes is attached to the other surface, opposite to the hand wheel 4, of the grating code disc, the arrangement of the light reflection area 511 and the light absorption area 512 can be achieved, and materials of the hand wheel 4 and the grating code disc can be selected randomly.

In other embodiments, the grating code wheel is a ring-shaped ring structure, the gratings are distributed on the ring surface of the ring structure, the detecting member 52 is disposed on the outer side or the inner side of the ring structure, and the receiving area of the receiving end of the detecting member 52 is relatively larger, so that the detecting light reflected by the reflective region 511 on the curved surface can be received.

In this embodiment, the detecting element 52 includes a photoelectric encoding chip, where the photoelectric encoding chip includes a light emitting LED light source and a light signal detecting circuit, the light emitting LED is a transmitting end of the photoelectric encoding chip, and the light signal detecting circuit is provided with a photosensitive receiving tube, where the photosensitive receiving tube is a receiving end. The luminous LED forms two paths of emission light through the lens, and then the luminous LED comprises a first emission end and a second emission end, wherein the first emission end is used for emitting first detection light, and the second emission end is used for emitting second detection light. The optical signal detection circuit is provided with two photosensitive receiving tubes, and the two photosensitive receiving tubes are a first receiving end and a second receiving end respectively. The first receiving end is used for receiving first detection light reflected by the light reflecting area 511 of the grating code disc, and the photoelectric coding chip generates a first pulse signal according to the transmitted and received first detection light; the second receiving end is used for receiving the second detection light reflected by the reflective area 511 of the grating code disc, and the photoelectric coding chip generates a second pulse signal according to the transmitted and received second detection light.

The first detection light is emitted as a first detection signal, the received first detection light is a second detection signal, and a first pulse signal can be generated according to the second detection signal, so that the operation amount for the hand wheel 4 is determined. Likewise, the second detection light can also determine the amount of operation for the hand wheel 4.

The first transmitting end and the second transmitting end of the photoelectric coding chip are arranged at intervals along the radial direction side by side, and the first receiving end and the second receiving end of the photoelectric coding chip are also arranged at intervals along the radial direction side by side, so that the first detection light and the second detection light emitted by the photoelectric coding chip at the same time respectively irradiate on different circumferential positions of the grating code disc, and a phase difference exists between pulses of the first detection light and the second detection light respectively received by the first receiving end and the second receiving end of the photoelectric coding chip.

Referring to fig. 7, in the present embodiment, the recording of the grating code wheel has a certain requirement, which specifies that N (equal to about 11.7) grating lines (light absorption regions 512) can be recorded per millimeter, the grating lines are sector-shaped regions, the central angle of the sector-shaped regions is 0.21739 °, the central angle of the sector-shaped regions between the grating lines is 0.21739 °, that is, the central angle of the sector-shaped regions enclosed by the light absorption regions and the light reflection regions is 0.43478 °. The grating code disc with the radius of R can be totally recorded with the grating line number CPR=2x3.148 xR x N, namely, each time the grating code disc rotates for one circle, the first pulse signal and the second pulse signal can respectively output CPR pulses, and the angular resolution r=360/CPR of each pulse. Therefore, the rotation angle of the grating code disc can be obtained by converting the number of pulses (either the first pulse signal or the second pulse signal) to be output, that is, the rotation angle of the hand wheel 4 can be calculated. Assuming that the number of output pulses is n, the rotation angle of the grating code disc and the hand wheel 4 is w=n×r=n×360/(2×3.148×r×n).

In this embodiment, a preset radial distance is provided between the first transmitting end and the second transmitting end of the photoelectric encoding chip, so that the phase difference between the generated first pulse signal and the generated second pulse signal is 90 °. The phase difference between the first pulse signal and the second pulse signal can be 60 degrees or other phase difference degrees.

Referring to fig. 8, when the grating code disc rotates counterclockwise along with the hand wheel 4, the phase of the first pulse signal advances by 90 ° with the phase of the second pulse signal; when the grating code wheel rotates clockwise with the hand wheel 4, the phase of the second pulse signal advances by 90 ° from the phase of the first pulse signal, a in fig. 2 represents the first pulse signal, and B represents the second pulse signal. The chip assembly 22 can determine the rotation direction of the hand wheel 4 according to the phase difference relationship between the first pulse signal and the second pulse signal.

In other implementations, the photoelectric encoding chip has a processing module, and the photoelectric encoding chip calculates the rotation angle and the rotation direction of the hand wheel 4 through the detected first pulse signal and the detected second pulse signal.

In other implementations, the photoelectric encoding chip further has a control module, and the photoelectric encoding chip is directly connected with the driving device 3, and the photoelectric encoding chip controls the driving device 3 to drive the optical module 1 to zoom or focus for imaging according to the calculated rotation angle and rotation direction of the hand wheel 4.

Referring to fig. 4 and 6, in the present embodiment, the outer side of the lens barrel 11 is mounted with a mounting base 53 by a screw, and the detecting member 52 is mounted on the mounting base 53. The mounting seat 53 is of an L-shaped structure, the mounting seat 53 is provided with a radial mounting surface, and the photoelectric coding chip is positioned on the mounting surface of the mounting seat 53, so that the photoelectric coding chip is axially aligned with the grating code disc.

The lens barrel 11 is also provided with a threading hole 111, the photoelectric coding chip is connected with the chip assembly 22 through a connecting wire 54, one end of the connecting wire 54 is connected with the photoelectric coding chip, and the other end of the connecting wire 54 extends into the shell 21 through the threading hole 111 to be connected with the chip assembly 22.

In this embodiment, a light shielding member 112 is further disposed in the threading hole 111, and the light shielding member 112 has a structure such as a rubber elastic plug or a cap, and the light shielding member 112 blocks the threading hole 111 to prevent light from entering the lens barrel 11. The light shielding member 112 separates the light path environment in the optical module 1 from the light path environment of the detection device 5, so as to avoid the influence of the detection light of the detection device 5 on the imaging light transmitted in the optical module 1.

In other embodiments, the lens barrel 11 is not provided with the threading hole 111, the housing 21 is provided with the threading hole, and the connecting wire 54 extends from the threading hole on the housing 21 to the connection between the housing 21 and the chip assembly 22, so that the connection between the photoelectric encoding chip and the chip assembly 22 can be realized, and the light path environment in the optical module 1 and the light path environment of the detection device 5 can be separated from each other.

In this embodiment, since the detection device 5 is provided, the detection device 5 is used for detecting the rotation direction and rotation angle of the hand wheel 4, and the driving device 3 drives the optical module 1 to perform zooming or focusing adjustment, the hand wheel 4 is a non-direct driving piece, so that the rotation restriction of the hand wheel 4 is relieved, the hand wheel 4 can rotate within 360 degrees at will to indirectly drive zooming or focusing adjustment, the sense of using hands is greatly improved, and the range of zooming or focusing adjustment is increased.

In one embodiment, the two photoelectric encoding chips are in a split structure, and one photoelectric encoding chip in the embodiment includes two transmitting ends and two receiving ends, which are in a collective structure.

The detecting member 52 in this embodiment includes two photoelectric encoding chips, which have a transmitting end and a receiving end, respectively, and are disposed at different circumferential positions, respectively, so that the two photoelectric encoding chips output two pulse signals having a phase difference, and the rotation angle and the rotation direction of the hand wheel 4 can be calculated as well.

Specifically, the detecting element 52 includes a first photoelectric coding chip and a second photoelectric coding chip, and the first photoelectric coding chip and the second photoelectric coding chip are arranged in parallel and at intervals relative to the grating code disc.

The first photoelectric coding chip comprises a first transmitting end and a first receiving end, the first transmitting end and the first receiving end of the first photoelectric coding chip are positioned on the same side of the grating code disc, the first transmitting end of the first photoelectric coding chip is used for transmitting first detection light, the first receiving end of the first photoelectric coding chip is used for receiving the first detection light reflected by the reflecting area 511, and the first photoelectric coding chip is used for generating a first pulse signal according to the transmitted and received first detection light; the second photoelectric coding chip comprises a second transmitting end and a second receiving end, the second transmitting end and the second receiving end of the second photoelectric coding chip are positioned on the same side of the grating code disc, the second transmitting end of the second photoelectric coding chip is used for transmitting second detection light, the second receiving end of the second photoelectric coding chip is used for receiving the second detection light reflected by the reflecting area 511, and the second photoelectric coding chip is used for generating a second pulse signal according to the transmitted and received second detection light.

In one embodiment, the detecting element 52 comprises a photoelectric encoder chip, which includes a transmitting end and a receiving end, and generates a pulse signal that is used to calculate the rotation angle of the hand wheel 4. The direction of rotation of the hand wheel 4 is detected by other means, such as by a photoelectric switch or a contact detection device.

In one embodiment, the detecting device 5 uses two photoelectric switches to detect, and the two photoelectric switches respectively generate a first pulse signal and a second pulse signal with a phase difference, so that the rotation angle and the rotation direction of the hand wheel 4 can be calculated.

Referring to fig. 9 and 10, in the present embodiment, the detecting device 5 includes an annular disc 55, a first photoelectric switch 56 and a second photoelectric switch 57, the annular disc 55 is a trigger, and the first photoelectric switch 56 and the second photoelectric switch 57 are detecting elements.

The annular disc 55 is provided with a plurality of raised strips 551 uniformly distributed on a circumference, the raised strips 551 are positioned in a plane, the raised strips 551 are trigger areas, and the gap areas between the raised strips 551 are non-trigger areas.

In other embodiments, the ribs 551 may be disposed in an annular plane.

In the present embodiment, the first photoelectric switch 56 and the second photoelectric switch 57 are arranged side by side in the circumferential direction. The first photoelectric switch 56 and the second photoelectric switch 57 respectively have a transmitting end and a receiving end, the transmitting end and the receiving end form a U-shaped structure with the body, the convex strips 551 of the annular disc 55 are penetrated in the U-shaped grooves of the first photoelectric switch 56 and the second photoelectric switch 57, the convex strips 551 of the annular disc 55 are equivalent to the optical signals in the U-shaped grooves for cutting the first photoelectric switch 56 and the second photoelectric switch 57, so that the first photoelectric switch 56 and the second photoelectric switch 57 respectively form an on-off-on-off alternating state, and pulse signals are further formed.

The first photoelectric switch 56 includes a first transmitting end and a first receiving end, the first transmitting end and the first receiving end of the first photoelectric switch 56 are respectively located at two sides of the convex strip 551, the first transmitting end of the first photoelectric switch 56 is used for transmitting first detection light, the first receiving end of the first photoelectric switch 56 is used for receiving the first detection light transmitted by the non-triggering area, and the first photoelectric switch generates a first pulse signal according to the transmitted and received first detection light.

The second photoelectric switch 57 includes a second transmitting end and a second receiving end, where the second transmitting end and the second receiving end of the second photoelectric switch 57 are located at two sides of the convex strip 551, respectively, the second transmitting end of the second photoelectric switch 57 is used to transmit second detection light, the second receiving end of the second photoelectric switch 57 is used to receive the second detection light transmitted by the non-trigger area, and the second photoelectric switch generates a second pulse signal according to the transmitted and received second detection light.

In this embodiment, two photoelectric switches are used to replace the photoelectric coding chip in the implementation, and the turning angle of the hand wheel 4 can be calculated through the switching of the on-off state of the photoelectric switches; the arrangement of the two photoelectric switches can also calculate the rotation direction of the hand wheel 4 according to the phase difference, so that the zooming or focusing imaging of the optical module 1 is realized.

In one embodiment, the annular disk 55 has a structure similar to a grating code disk, a plurality of strip-shaped grooves uniformly distributed on a circumference are arranged on the annular disk 55, the strip-shaped grooves are non-trigger areas, and the areas between the strip-shaped grooves are trigger areas.

In this embodiment, the first transmitting end and the first receiving end of the first photoelectric switch 56, and the second transmitting end and the second receiving end of the second photoelectric switch 57 are respectively disposed at two sides of the bar-shaped groove. It is also possible to generate a first pulse signal and a second pulse signal having a phase difference, respectively.

In one embodiment, the detecting device 5 comprises an annular disc and a photoelectric switch, the photoelectric switch comprises a transmitting end and a receiving end, and the photoelectric switch generates a pulse signal through detection, and the pulse signal is used for calculating the rotation angle of the hand wheel 4. The direction of rotation of the hand wheel 4 is detected by other means, such as by a photoelectric switch or a contact detection device.

As shown in fig. 11, in one embodiment an endoscopic imaging system 1000 is provided, the endoscopic imaging system 1000 comprising a light source 10, a light guide 20, a rigid tube endoscope 30, an optical bayonet 40, an endoscopic camera 50, a communication cable 81, an imaging host 60, a display 70, and a video connection line 82. Wherein the endoscope camera 50 is the endoscope camera in the above-described embodiment.

The camera host 60 is connected to the endoscope camera 50 through a communication cable 81, and an image signal obtained by the endoscope camera 50 is transmitted to the camera host 60 through the communication cable 81 to be processed. In some embodiments, the communication cable 81 may be an optical communication cable, such as an optical fiber; the endoscope camera 50 converts an image signal (an electric signal) into an optical signal, and the optical signal is transmitted to the camera host 60 by the communication cable 81, and the camera host 60 converts the optical signal into an electric signal. The camera host 60 is connected to the display 70 through a video connection line 82, and is used for transmitting video signals to the display 70 for displaying. It should be understood by those skilled in the art that fig. 11 is merely an example of an endoscopic imaging system 1000 and is not limiting of the endoscopic imaging system 1000, and that the endoscopic imaging system 1000 may include more or fewer components than shown in fig. 11, or may combine certain components, or different components, e.g., the endoscopic imaging system 1000 may further include a dilator, a smoke control apparatus, an input-output device, a network access device, etc.

The light source 10 is used to provide an illumination source to the site 100 to be observed. The illumination sources include a visible light illumination source and a laser illumination source (e.g., near infrared light) corresponding to the fluorescent agent. Light source 10 includes, but is not limited to, a laser light source, an LED light source, or a laser diode.

In the present embodiment, the light source 10 includes a visible light source and a laser light source corresponding to a fluorescent agent. The visible light source is an LED light source. In an embodiment, the visible light source may provide a plurality of monochromatic lights with different wavelength ranges, such as blue light, green light, red light, and the like, respectively. In other embodiments, the visible light source may also provide a combined light of the plurality of monochromatic lights, or a broad spectrum white light source. The monochromatic light has a wavelength in the range of approximately 400nm to 700nm. The laser light source is used for generating laser. The laser is for example near infrared light (NEAR INFRARED; NIR). The peak wavelength of the laser takes at least any 1 value in the 780nm or 808nm range.

Since the light source 10 can simultaneously supply the continuous visible light and the laser light corresponding to the fluorescent agent to the site to be observed, the efficiency of the camera 50 for collecting the visible light image signal and the fluorescent image signal reflected by the site to be observed 100 is improved.

Wherein a contrast agent, such as indocyanine green (Indocyanine Green; ICG), is introduced intravenously or subcutaneously in the site to be observed 100 prior to imaging using the endoscopic imaging system 1000, in order to image tissue structures and functions (e.g., blood/lymph/bile in the vessel) that are not readily visible with standard visible light imaging techniques. The site to be observed 100 includes, but is not limited to, the blood circulation system, the lymphatic system, and tumor tissue. ICG is commonly called indocyanine green, green needle for diagnosis and indocyanine green, is a common contrast agent in clinical diagnosis of cardiovascular system diseases at present, and is widely applied to choroid and retinal blood vessel imaging. Fluorescence may be generated when the contrast agent in the site to be observed 100 absorbs the laser light generated by the laser light source corresponding to the fluorescent agent.

In the endoscope camera system 1000 of the embodiment, since the driving device 3 and the detecting device 5 are added in the endoscope camera 50, the operation amount of the hand wheel 4 can be detected by the detecting device 5, and the optical module 1 is driven by the driving device 3 to perform zooming or focusing adjustment according to the detected operation amount, the hand wheel 4 is a non-direct driving piece, the rotation restriction of the hand wheel 4 is relieved, the hand wheel 4 can be rotated at will to indirectly drive zooming or focusing adjustment, the using feeling is greatly improved, and the range of zooming or focusing adjustment is increased.

The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.

Claims

An endoscopic camera head, comprising:

the optical module comprises a lens barrel, a fixed optical component and an adjustable optical component, wherein the fixed optical component is fixedly arranged in the lens barrel, and the adjustable optical component is axially movably arranged in the lens barrel;

the chip module comprises a shell and a chip assembly, wherein the shell is connected with the lens barrel, and the chip assembly is arranged in the shell;

the driving device is provided with an output end and an electric connection end, the output end is connected with the adjustable optical component, and the electric connection end is electrically connected with the chip component;

The hand wheel is rotatably arranged on the lens cone; and

The detection device comprises a trigger piece and a detection piece, wherein the trigger piece is arranged on the hand wheel, the detection piece is electrically connected with the chip assembly, the detection piece is provided with a detection end, and the detection end is arranged towards the trigger piece; the detection piece is used for detecting the trigger piece which rotates along with the hand wheel and generating corresponding detection signals, the chip module calculates the rotation direction and/or rotation angle of the hand wheel according to the detection signals, and the chip module controls the driving device to drive the adjustable optical assembly to move according to the calculation result so as to realize zooming or focusing adjustment.
The endoscope camera head according to claim 1, wherein the trigger piece is provided with a trigger area and a non-trigger area, a plurality of trigger areas and non-trigger areas are alternately arranged on a circumference, and the trigger areas and the non-trigger areas are used for triggering the detection piece to form a pulse signal.
The endoscopic camera according to claim 2, wherein said triggered zone and said non-triggered zone span the same central angle.
The endoscope camera head of claim 2, wherein the pulse signals comprise a first pulse signal and a second pulse signal with a phase difference, and the chip module calculates a rotation direction and a rotation angle of the hand wheel according to the first pulse signal and the second pulse signal.
The endoscopic camera according to claim 4, wherein a phase difference between said first pulse signal and said second pulse signal is 90 °.
The endoscopic camera according to claim 1, wherein the detecting member is adapted to emit and receive the detection light, and the triggering member is adapted to reflect or transmit the detection light to trigger the detecting member to generate the pulse signal.
The endoscopic camera according to claim 6, wherein said detecting member includes an emitting end and a receiving end, said emitting end of said detecting member is configured to emit detection light, said receiving end of said detecting member is configured to receive detection light, and said detecting member generates said pulse signal based on said emitted and received detection light.
The endoscopic camera according to claim 2, wherein the trigger member is a grating code wheel having alternating light reflecting regions and light absorbing regions thereon, the light reflecting regions being the trigger regions and the light absorbing regions being the non-trigger regions.
The endoscopic camera according to claim 8, wherein said detecting member comprises a photoelectric encoding chip including a transmitting end and a receiving end, said transmitting end and said receiving end of said photoelectric encoding chip being located on the same side of said grating code wheel, said transmitting end of said photoelectric encoding chip being configured to transmit detection light, said receiving end of said photoelectric encoding chip being configured to receive said detection light reflected by said light reflection area, said photoelectric encoding chip generating said pulse signal based on the transmitted and received detection light.
The endoscopic camera according to claim 8, wherein said detecting member comprises a photoelectric encoding chip comprising a first transmitting end, a first receiving end, a second transmitting end and a second receiving end; the first transmitting end and the first receiving end of the photoelectric coding chip are positioned on the same side of the grating code disc, the first transmitting end of the photoelectric coding chip is used for transmitting first detection light, the first receiving end of the photoelectric coding chip is used for receiving the first detection light reflected by the light reflecting area, and the photoelectric coding chip generates a first pulse signal according to the transmitted and received first detection light; the second transmitting end and the second receiving end of the photoelectric coding chip are positioned on the same side of the grating code disc, the second transmitting end of the photoelectric coding chip is used for transmitting second detection light, the second receiving end of the photoelectric coding chip is used for receiving the second detection light reflected by the light reflecting area, and the photoelectric coding chip generates a second pulse signal according to the transmitted and received second detection light.
The endoscope camera head of claim 8, wherein the detection member comprises a first photoelectric coding chip and a second photoelectric coding chip, the first photoelectric coding chip comprises a first transmitting end and a first receiving end, the first transmitting end and the first receiving end of the first photoelectric coding chip are positioned on the same side of the grating code disc, the first transmitting end of the first photoelectric coding chip is used for transmitting first detection light, the first receiving end of the first photoelectric coding chip is used for receiving the first detection light reflected by the light reflecting area, and the first photoelectric coding chip is used for generating a first pulse signal according to the transmitted and received first detection light; the second photoelectric coding chip comprises a second transmitting end and a second receiving end, the second transmitting end and the second receiving end of the second photoelectric coding chip are positioned on the same side of the grating code disc, the second transmitting end of the second photoelectric coding chip is used for transmitting second detection light, the second receiving end of the second photoelectric coding chip is used for receiving the second detection light reflected by the reflecting area, and the second photoelectric coding chip is used for generating a second pulse signal according to the transmitted and received second detection light.
The endoscopic camera according to claim 8, wherein said grating code wheel is of annular flat plate construction, and said light reflecting area and light absorbing area are located in an annular plane.
The endoscope camera head according to claim 2, wherein the triggering piece is an annular disc, a plurality of raised strips which are uniformly distributed on a circumference are arranged on the annular disc, the raised strips are the triggering areas, and a gap area between the raised strips is the non-triggering area.
The endoscope camera head according to claim 2, wherein the triggering piece is an annular disc, a plurality of strip-shaped holes are uniformly distributed on the circumference of the annular disc, the strip-shaped holes are the non-triggering areas, and the area between the strip-shaped holes is the triggering area.
The endoscopic camera according to claim 13 or 14, wherein said detecting member comprises a photoelectric switch including a transmitting end and a receiving end, said transmitting end and said receiving end of said photoelectric switch being located on both sides of said trigger area, said transmitting end of said photoelectric switch being adapted to transmit detection light, said receiving end of said photoelectric switch being adapted to receive said detection light reflected by said trigger area, said photoelectric switch generating said pulse signal based on said transmitted and received detection light.
The endoscope camera head according to claim 13 or 14, wherein the detecting member includes a first photoelectric switch and a second photoelectric switch, the first photoelectric switch includes a first transmitting end and a first receiving end, the first transmitting end and the first receiving end of the first photoelectric switch are respectively located at two sides of the trigger area, the first transmitting end of the first photoelectric switch is used for transmitting first detection light, the first receiving end of the first photoelectric switch is used for receiving first detection light transmitted by the non-trigger area, and the first photoelectric switch generates a first pulse signal according to the transmitted and received first detection light; the second photoelectric switch comprises a second transmitting end and a second receiving end, the second transmitting end and the second receiving end of the second photoelectric switch are respectively positioned on two sides of the trigger area, the second transmitting end of the second photoelectric switch is used for transmitting second detection light, the second receiving end of the second photoelectric switch is used for receiving the second detection light transmitted by the non-trigger area, and the second photoelectric switch generates a second pulse signal according to the transmitted and received second detection light.
The endoscope camera head of claim 1, wherein the lens barrel is provided with a mounting seat, the detection piece is mounted on the mounting seat, the lens barrel is further provided with a threading hole, and the threading hole is used for threading a connecting wire between the detection piece and the chip module.
The endoscopic camera according to claim 6, wherein an optical path environment of said optical module is spaced apart from an optical path environment of said detecting means.
An endoscopic camera according to claim 18, wherein a light shield is provided between the optical module and the detection means.
The endoscopic camera according to claim 1, wherein the hand wheel has an axial annular groove, the detection means being located within the annular groove of the hand wheel.
An endoscopic camera according to claim 20, wherein the opening of the annular recess is provided with a seal for sealing the detection means within the annular recess.
An endoscopic camera head, comprising:

the optical module is used for acquiring optical image information of a target part and providing a transmission light path for the optical image information;

The chip module is connected with the optical module and is used for receiving the optical image information transmitted by the optical module and converting the optical image information into an electric signal;

The operation piece is connected with the optical module and is used for adjusting parameters of the optical module according to the operation of a user;

The detection device comprises a trigger piece and a detection piece, wherein the trigger piece is arranged on the operation piece and moves together with the operation piece according to the operation of the user; the detection piece is used for emitting a first detection signal, acquiring a second detection signal formed by reflecting or transmitting the first detection signal by the trigger piece, and determining the operation amount of the user on the operation piece based on the second detection signal.
The endoscopic camera according to claim 22, wherein said first detection signal and said second detection signal are optical signals.
The endoscopic camera according to claim 22, wherein the detection means comprises a photoelectric encoder, the trigger member comprises a grating code wheel of the photoelectric encoder, the detection member comprises a photoelectric encoding chip of the photoelectric encoder, and the photoelectric encoding chip is configured to transmit the first detection signal and receive the second detection signal, and determine an operation amount of the operation member by the user based on the second detection signal.
The endoscopic camera according to claim 22, wherein the operation member is a focusing hand wheel for being rotated according to an operation of a user to adjust an imaging focal length of the optical module.
An endoscope camera system, which is characterized by comprising a light source, a light guide beam, an endoscope, an optical bayonet, a communication cable, a camera host, a display, a video connecting wire and the endoscope camera head according to any one of claims 1 to 25, wherein the light source is connected with the endoscope through the light guide beam, one end of the endoscope camera head is connected with the endoscope through the optical bayonet, the other end of the endoscope camera head is connected with the camera host through the communication cable, and the camera host is connected with the display through the video connecting wire.