WO2015146341A1 - 内視鏡装置 - Google Patents
内視鏡装置 Download PDFInfo
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- WO2015146341A1 WO2015146341A1 PCT/JP2015/053887 JP2015053887W WO2015146341A1 WO 2015146341 A1 WO2015146341 A1 WO 2015146341A1 JP 2015053887 W JP2015053887 W JP 2015053887W WO 2015146341 A1 WO2015146341 A1 WO 2015146341A1
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- WIPO (PCT)
- Prior art keywords
- lens
- step position
- movable lens
- moving
- moved
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2423—Optical details of the distal end
- G02B23/243—Objectives for endoscopes
- G02B23/2438—Zoom objectives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00039—Operational features of endoscopes provided with input arrangements for the user
- A61B1/00042—Operational features of endoscopes provided with input arrangements for the user for mechanical operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00096—Optical elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00188—Optical arrangements with focusing or zooming features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/044—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances for absorption imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/045—Control thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2476—Non-optical details, e.g. housings, mountings, supports
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
Definitions
- the present invention relates to an endoscope apparatus, and more particularly to an endoscope apparatus that controls a movable lens of an observation optical system provided at a distal end portion of an endoscope insertion portion.
- an endoscope apparatus includes an endoscope (scope) provided with an imaging unit for imaging the inside of a body cavity and an endoscope that is imaged by an imaging unit of the endoscope. It comprises a processor device that performs image processing on the output image data and outputs it to a display device.
- Patent Document 1 adopts a zoom optical system that can change the focal length by moving some lenses (zoom lenses) in the optical axis direction as an objective optical system of an imaging unit of an endoscope.
- An endoscope is disclosed in which an enlargement magnification (zoom magnification) of an observation image photographed by the above can be changed.
- the endoscope is provided with a zoom switch for the user to instruct a change in the zoom magnification of the observation image, and the zoom switch has a zoom magnification to the wide side (low magnification side).
- a wide side switch for instructing a change and a tele side switch for instructing to change the zoom magnification to the tele side (high magnification side) are provided.
- the zoom lens of the zoom optical system moves a predetermined distance to the wide side or the tele side by giving a driving pulse to an actuator connected to the zoom lens, and the position is controlled by the number of driving pulses given to the actuator.
- various modes are provided for zoom lens control, and in one of them, the step mode is a single operation of turning on the tele-side switch or wide-side switch of the user's zoom switch.
- a predetermined number of drive pulses are applied to the actuator, and the zoom lens is positioned at a predetermined zoom magnification (1 ⁇ , 20 ⁇ , 40 ⁇ , 60 ⁇ ,). It is disclosed to move.
- a so-called step zoom function in which the zoom magnification that can be changed is limited to a magnification of several steps and the zoom magnification can be changed in units of steps is a fine zoom magnification. This is a convenient function for a user who does not need to make a major change and needs only a rough change because the number of operations and operation time of the zoom switch can be reduced.
- zoom magnifications for a plurality of steps for example, 1 ⁇ , 20 ⁇ , 40 ⁇ , 60 ⁇ , 80 ⁇ , and 100 ⁇ .
- zoom magnifications for a plurality of steps for example, 1 ⁇ , 20 ⁇ , 40 ⁇ , 60 ⁇ , 80 ⁇ , and 100 ⁇ .
- the zoom magnification increases by one step (1 ⁇ ⁇ 20 ⁇ ⁇ 40 ⁇ ...), And when the wide switch is turned on once, The zoom magnification is restored to 1 ⁇ .
- the present invention has been made in view of such circumstances, and improves operability when the movable lens of the objective optical system in the imaging unit of the endoscope is moved at a plurality of predetermined step positions. It is an object of the present invention to provide an endoscopic device.
- an endoscope apparatus includes a movable lens constituting an objective optical system of an endoscope, a lens driving unit that electrically drives the lens, and an operator's on-state.
- An operation unit that outputs an operation signal corresponding to an operation and an off operation, and a lens control unit that moves the lens to one of a plurality of step positions, and the on operation is performed based on the operation signal
- the ON operation duration time and the ON operation repeat count when the ON operation and OFF operation are continuously repeated are detected, and the lens is determined based on the detected ON operation duration and repeat count.
- Lens control means for determining a step position for moving the lens.
- the operation means is a simple one having only an on operation and an off operation
- various operations can be performed by considering the duration of the on operation and the number of repetitions. Therefore, not only a simple operation of moving the movable lens to a plurality of step positions one step at a time, but also advanced operations such as a movement for a plurality of steps, a movement to the end, and a return to the original position. Can be performed without increasing the number of operating means.
- the lens control unit sets the ON operation after the duration of the OFF operation to be equal to or greater than the threshold T1 as the first ON operation, and sets the number of ON operation repetitions to 1.
- the on operation is performed when the duration of the off operation after the on operation is less than the threshold value T1, it is preferable to increase the number of repetitions of the on operation by one.
- the lens control unit detects the first on-operation when the lens is stopped
- the lens moves in a predetermined movement direction corresponding to the operation unit. After starting, the lens is moved from the step position at the time of stop to the step position away from the moving direction by the number of steps corresponding to the number of repeated ON operations including the first ON operation detected. preferable.
- the lens is moved by a plurality of steps by one continuous on operation. Can be made.
- the lens control unit when the lens control unit detects the first on operation when the lens is stopped, the duration of the first on operation is equal to or greater than the threshold value T2.
- T2 the threshold value
- the lens can be moved to the end step position only by performing an on operation with a long duration, that is, a so-called long press operation.
- the lens control unit moves when detecting the first on-operation while moving the lens in a predetermined movement direction corresponding to the operation unit. It is preferable that the lens is moved to a step position that is the end of the direction.
- the endoscope apparatus includes a reversal operation unit that outputs an operation signal corresponding to an on operation and an off operation of an operator, and the lens control unit corresponds to the operation unit in advance. It is preferable that the lens is moved to the step position at the start of movement when an on operation by the reversing operation means is detected during movement in the determined movement direction.
- the lens when the lens is moved from a predetermined step position to another step position, it can be easily returned to the original step position.
- the endoscope apparatus includes a reversing operation unit that outputs an operation signal corresponding to an on operation and an off operation of an operator, and the lens control unit moves the lens to a target step position. Therefore, when an ON operation by the reversing operation unit is detected while moving in a predetermined movement direction corresponding to the operation unit, the lens is moved from the target position after the lens is moved to the target step position. It is preferable that the lens is moved to a step position separated by one step in the direction opposite to the moving direction.
- the lens when the lens is moved to a predetermined step position, it can be instructed to return to the step position in the opposite direction by one step before reaching the step position.
- the endoscope apparatus includes a reversing operation unit that outputs an operation signal corresponding to an on operation and an off operation of an operator, and the lens control unit moves the lens to a target step position. Therefore, when the ON operation by the reversing operation means is detected while the movement is made in a predetermined moving direction corresponding to the operating means, the moving direction with respect to the lens position at the time of detecting the ON operation by the reversing operation means It is preferable that the lens is moved to the step position closest to the opposite direction.
- the lens driving unit is a unit that drives the lens by a DC motor.
- the lens driving means can be downsized, which contributes to downsizing of the endoscope.
- the operation unit is a unit that outputs an operation signal corresponding to a pressing operation of a switch as an on operation.
- the lens control unit performs a step with respect to a position that can be set when the lens is moved by the minimum unit movement amount according to a driving instruction given to the lens driving unit. It is preferable to have a look-up table for associating each of the positions, and to move the lens to a target step position with reference to the look-up table.
- the lens is a lens for changing the zoom magnification of the objective optical system
- the step position is a lens position for setting a predetermined zoom magnification. It can be set as a certain aspect.
- the present invention it is possible to improve the operability when the movable lens of the objective optical system in the imaging unit of the endoscope is moved at a plurality of predetermined step positions.
- the perspective view which shows the structure of the endoscope system which is one form of the endoscope apparatus which concerns on this invention.
- the perspective view which showed the front end surface of the insertion part of an endoscope Sectional drawing of the imaging
- the block diagram which showed the structure part mainly related to control of a photographic lens unit in an endoscope system Explanatory diagram used to explain the correspondence between unit movement positions Pos0 to Pos7 and step positions SP1 to SP4 Explanatory drawing which showed a mode that the movable lens moves based on the repetition frequency N of ON operation of a tele side switch, and duration T
- FIG. 1 is a perspective view showing a configuration of an endoscope system which is an embodiment of an endoscope apparatus according to the present invention.
- the 1 has an endoscope 60 (electronic endoscope), a processor device 61, and a light source device 62.
- the endoscope 60 is connected to a flexible insertion portion 66 that is inserted into a body cavity of a patient, a hand operation portion 67 that is connected to a proximal end portion of the insertion portion 66, a processor device 61, and a light source device 62.
- Connector 69a, and a universal cord 69 that connects the hand operating section 67 and the connector 69a.
- the insertion portion 66 has a distal end portion 66a, a bending portion 66b, and a flexible portion 66c in order from the distal end.
- the distal end portion 66a is formed using a hard resin, and is provided with a photographing unit 10 whose details will be described later.
- the bending portion 66b is bent vertically and horizontally by rotating the angle knob 70 of the hand operation portion 67, and changes the direction of the tip portion 66a.
- the soft part 66c has flexibility, and connects the curved part 66b and the hand operation part 67 in a long shape.
- an air / water feed button 76 By pressing the air / water supply button 76, water or air can be ejected from the air / water supply nozzle 75 on the distal end surface of the insertion portion 66, and by pressing the suction button 77, the insertion portion 66 is pressed. From the forceps outlet 72 on the distal end surface, a to-be-sucked object such as liquid or tissue in the body can be sucked.
- the forceps outlet 72 communicates with the forceps port 71 of the hand operation unit 67 through the inside of the insertion unit 66, and a treatment tool such as a forceps inserted from the forceps port 71 is led out.
- the release button 78 it is possible to record the observation image captured by the imaging unit 10, and by pressing the zoom switch 79 (pressing operation), the zoom of the imaging unit 10 can be recorded.
- the magnification can be changed.
- the processor device 61 is electrically connected to the light source device 62 and comprehensively controls the operation of the endoscope system 59.
- the processor device 61 supplies power to the endoscope 60 via the universal cord 69 and the transmission cable 44 inserted into the insertion portion 66, and controls the driving of the imaging portion 10 of the distal end portion 66a. Further, the processor device 61 receives a signal from the imaging unit 10 via the transmission cable 44 and performs various processes to generate image data.
- a monitor 81 is connected to the processor device 61. The monitor 81 displays an observation image based on the image data from the processor device 61.
- FIG. 3 is a cross-sectional view of the imaging unit 10 housed and arranged inside the distal end portion 66a.
- the photographing unit 10 includes a photographing lens unit 11 and an imaging unit 12.
- the photographic lens unit 11 includes a photographic lens 14 and a lens moving unit 15 that constitute an objective optical system of the photographic unit 10.
- the photographing lens 14 is configured by sequentially arranging a first fixed lens 21, a first movable lens 22, a second movable lens 23, and a second fixed lens 24 in the optical axis direction.
- the fixed lenses 21 and 24 are fixed to a housing 13 that is held by a holding frame and accommodates and holds the photographing lens unit 11 integrally.
- the lens moving unit 15 includes a cam shaft 25 and a first lens moving frame 26 and a second lens moving frame 27 that slide on the cam shaft 25.
- the lens moving unit 15 moves the movable lenses 22 and 23 in the optical axis direction and changes the focal length of the photographing lens 14 to enable variable magnification photographing.
- the cam shaft 25 has two cam grooves 25a and 25b on the outer peripheral surface, a wire connecting hole 25c along the axis at the rear end, and a locking flange 25d on the outer peripheral surface of the rear end.
- the tip of the wire 18 for rotational driving is fixed to the wire connecting hole 25c.
- the wire 18 is placed in the protective tube 19 and connected to a motor 80 (see FIG. 1) in the hand operating section 67.
- the motor 80 is driven and controlled so as to rotate forward or reverse by operating the zoom switch 79 of the hand operating section 67.
- a fixing ring 29 is attached to the tip of the cam shaft 25.
- the cam ring 25 is rotatably supported by the fixing ring 29. Further, the locking flange 25d on the rear end side of the cam shaft 25 is locked to the locking ring 34a, and the movement of the cam shaft 25 in the axial direction is restricted.
- the first lens moving frame 26 holds the first movable lens 22 as a lens frame, and the cam shaft 25 is inserted therethrough.
- the second lens moving frame 27 also holds the second movable lens 23 as a lens frame, and the cam shaft 25 is inserted.
- the first engagement pin 28a is attached to the first lens moving frame 26, and the tip of the engagement pin 28a is fitted into the first cam groove 25a. Further, an engagement pin 28b is attached to the second lens moving frame 27, and the second engagement pin 28b is fitted into the second cam groove 25b.
- the camshaft 25 When the camshaft 25 is rotated forward or reversely by the motor 80 (see FIG. 1), the camshaft 25 is rotationally displaced in accordance with the amount of rotation, and the rotational displacement causes the first and second via the engagement pins 28a and 28b.
- the second lens moving frames 26 and 27 move in the optical axis direction together with the first movable lens 22 and the second movable lens 23.
- the first movable lens 22 and the second movable lens 23 move in the optical axis direction with a positional relationship defined by the cam groove 25a and the cam groove 25b.
- the zoom magnification of the photographing unit 10 is changed.
- the imaging unit 12 is attached to the rear stage of the photographing lens 14 of the photographing lens unit 11.
- the imaging unit 12 includes a prism holding frame 40, a prism 41, a solid-state imaging element 42, and the like.
- the prism 41 is a right-angle prism, and has five surfaces including an incident surface 41a and an output surface 41b intersecting at right angles, a reflecting surface 41c formed of an inclined surface, and both side surfaces 41d.
- the prism 41 is held by a prism holding frame 40 that is fixed to the housing 13 of the photographing lens unit 11.
- An opening 40c through which incident light from the photographic lens 14 passes is formed at the rear end of the prism holding frame 40, and an incident surface 41a of the prism 41 is disposed along the rear end of the prism holding frame 40.
- 41 emission surfaces 41b are arranged.
- a solid-state image sensor 42 is attached to the emission surface 41 b of the prism 41, and a circuit board 43 for driving the solid-state image sensor 42 is attached to the slope of the prism 41 with an adhesive.
- the circuit board 43 is connected to a transmission cable strand (signal line) 44 a inserted into the universal cord 69 and the insertion portion 66.
- the solid-state image sensor 42 is a CCD (Charge-Coupled Device) type or CMOS (Complementary-Metal-Oxide-Semiconductor) type solid-state image sensor, and image light from an observation site is formed on the imaging surface of the solid-state image sensor 42. Passes through the taking lens 14 and is incident after being reflected by the prism 41. The solid-state image sensor 42 captures an optical image of the observed region imaged on the imaging surface and outputs it as an imaging signal.
- CCD Charge-Coupled Device
- CMOS Complementary-Metal-Oxide-Semiconductor
- the configuration of the imaging unit 10 illustrated in FIG. 3 is an example and is not limited thereto.
- FIG. 4 is a block diagram showing components related mainly to the control of the photographing lens unit 11 in the endoscope system 59. As shown in FIG.
- the endoscope 60 is provided with a control circuit 90 as lens control means, and a motor 80 (moving device) that moves the first movable lens 22 and the second movable lens 23 of the photographing lens unit 11 described above. 1), that is, the motor 80 for rotating the cam shaft 25 is controlled by the control circuit 90 via a motor driving circuit 92 as lens driving means.
- the state related to the position is referred to as the position of the movable lens.
- the position of the movable lens can be represented by the rotational position of the cam shaft 25.
- the zoom position detecting means 94 shown in FIG. Is supplied to the control circuit 90 as information indicating the position of the movable lens.
- the control circuit 90 also controls the solid-state image sensor 42 of the imaging unit 10 and controls the entire endoscope 60 in an integrated manner.
- An imaging signal output from the solid-state imaging element 42 is transmitted to the processor device 61 and subjected to various processes by the main CPU 100 of the processor device 61 and the like.
- the motor 80 is, for example, a direct current motor advantageous for miniaturization, and is driven by a drive signal supplied from the motor drive circuit 92.
- the motor drive circuit 92 continuously outputs a voltage signal or a specific waveform having a predetermined voltage continuously during the output time of the drive signal instructed by the control circuit 90 (or while the output of the drive signal is instructed).
- a voltage signal (for example, a pulse train) is applied to the motor 80 as a drive signal.
- the movable lens is moved.
- the motor 80 can be rotated in both forward and reverse directions, and the movable lens can be moved to both the wide side (wide angle side) and the telephoto side (enlargement side).
- the control circuit 90 gives the motor drive circuit 92 a drive instruction regarding the moving direction of the movable lens, that is, the polarity of the drive signal given to the motor 80 and the output time of the drive signal. Instead of instructing the motor drive circuit 92 to output the drive signal, it is possible to continuously instruct the motor drive circuit 92 to output the drive signal during the output time.
- the position of the movable lens is controlled by the output time of the drive signal to the motor 80, and the minimum output time (minimum output time) is predetermined as the output time.
- Pos0 be the position of the movable lens when the movable lens is set to the wide end, which is the end in the moving direction on the wide side.
- the control circuit 90 instructs the motor drive circuit 92 to set the moving direction of the movable lens to the tele side with respect to the motor drive circuit 92 and set the output time of the drive signal as the minimum output time.
- a drive signal is given from the motor drive circuit 92 to the motor 80 according to this.
- the movable lens moves by the minimum unit movement amount (unit movement amount) and stops.
- the movable lens is set at a plurality of positions until reaching the tele end, which is the end in the moving direction on the tele side. .
- These positions are positions that can be set by the movement of the minimum unit. If the unit movement position is assumed, in this embodiment, the unit movement positions are set to 8 points Pos0 to Pos7. However, Pos0 indicates the position of the wide end, and Pos7 indicates the position of the tele end.
- control circuit 90 is connected to a zoom switch 79 which is a form of operating means for operating the zoom, and determines a target position for moving the movable lens based on an operation signal given from the zoom switch 79.
- the above instruction is given to the motor drive circuit 92 so that the movable lens moves to the target position.
- the zoom switch 79 is provided in the hand operation unit 67 of the endoscope 60 as shown in FIG. 1, and instructs to change the zoom magnification of the observation image by the photographing unit 10 to the wide side (low magnification side). And a tele-side switch 79T for instructing to change the zoom magnification of the observation image to the tele-side (high-magnification side).
- Each of the wide-side switch 79W and the tele-side switch 79T indicates when the pressing operation is performed, and indicates when the operation is performed, and an operation signal corresponding to the ON operation to the control circuit 90 (in this embodiment, a high level voltage) Signal).
- the pressing operation is not performed, the operation is turned off, and an operation signal corresponding to the off operation (in this embodiment, a low level voltage signal) is given.
- the control circuit 90 is connected to the main CPU 100 of the processor device 61 and can transmit and receive various signals. Therefore, an operation signal similar to that of the zoom switch 79 can be given to the control circuit 90 through the main CPU 100, and a drive instruction to the motor drive circuit 92 can be issued based on the operation signal.
- an operation means such as a zoom switch (foot switch) operated by a foot can be connected to the processor device 61 and an operation signal of the operation means can be given to the control circuit 90 via the main CPU 100.
- the control circuit 90 determines a target position for moving the movable lens based on the operation signal given from the zoom switch 79, but instead of the unit movement positions Pos0 to Pos7 described above, a step position corresponding to a specific zoom magnification is selected. The target position is determined.
- FIG. 5 shows the correspondence between the unit movement positions Pos0 to Pos7 and the step position.
- the step position SP1 is a position of the movable lens when the zoom magnification is 1 and is a unit movement position.
- the step position SP2 is the position of the movable lens when the zoom magnification is 20 times, and corresponds to the position of the unit movement position Pos2.
- the step position SP3 is a position of the movable lens when the zoom magnification is 40 times, and corresponds to the position of the unit movement position Pos5.
- the step position SP4 is the position of the movable lens when the zoom magnification is 80 times, and corresponds to the position of the unit movement position Pos7.
- the step positions SP1 to SP4 correspond to zoom magnifications of 1 (no enlargement), 20 times, 40 times and 80 times, respectively, and the unit movement positions Pos0, Pos2, Pos5 and Pos7 also. It corresponds. Therefore, when a high-level voltage signal indicating that the tele-side switch 79T is turned on once is given, the control circuit 90 is one step away from the step position where the movable lens is currently set.
- the step position is determined as a target position (target step position). For example, if the current step position is SP2, SP3 is determined as the target step position.
- the step position on the wide side by one step with respect to the step position set at the present time is set as the target step position. decide. For example, if the current step position is SP2, SP1 is determined as the target step position.
- the control circuit 90 creates a lookup table in which the unit movement positions Pos0 to Pos7 are associated with the step positions SP1 to SP4 as shown in FIG. It reads out from the non-volatile memory 96 shown and refers to it to determine the moving direction of the movable lens to the target step position and the amount of movement of the movable lens to the target step position.
- the movement amount of the movable lens to the target step position is calculated as a multiple of the above unit movement amount.
- the control circuit 90 gives the motor drive circuit 92 a drive instruction regarding the moving direction of the movable lens and the output time of the drive signal to the motor drive circuit 92 as described above.
- the output time of the drive signal is a value obtained by multiplying the minimum output time for moving by the unit movement amount by the multiple determined as described above (the number of changes in the unit movement position until the target step).
- the motor driving circuit 92 gives a driving signal to the motor 80, so that the movable lens moves to the target step position and stops.
- the instruction to the motor drive circuit 92 based on the target step position determined by the control circuit 90 and the form related to the driving of the movable lens by the motor drive circuit 92 based on the instruction are only one form.
- the processing and control for moving the movable lens to the step position are not limited to the above embodiment.
- control circuit 90 measures the duration T and the number of repetitions N when the tele switch 79T is turned on.
- the ON operation duration T is the time during which the tele-on switch 79T is turned on (pressed) for one time, and the high-level voltage signal is continuously applied from the tele-side switch 79T. Indicates. If this duration T is less than a predetermined threshold T2, it is a normal on operation, and if it is longer than the threshold T2, it is distinguished as a long press on operation.
- the number of repetitions N is defined as the first on operation when the on operation after the duration of the off operation of the tele switch 79T (the state in which the teleoperation is not performed) becomes equal to or greater than a predetermined threshold T1.
- a predetermined threshold T1 When the ON operation is performed when the ON operation is repeated when the ON operation is repeated when the duration of the OFF operation after the predetermined ON operation is less than the threshold value T1, the ON operation is repeated N. Indicates the number of times obtained.
- the operation is switched to the off operation.
- the on operation is performed again when the duration of the off operation is less than the threshold value T1
- the number of repetitions N of the on operation is 2.
- the number of repetitions N becomes 3.
- the duration of the OFF operation after the first, second, or third ON operation is equal to or greater than the threshold T1
- the ON operation that is performed for the first time after that is the first ON operation, and the number of repetitions N is 1. become.
- the number N of repeated ON operations indicates the number of repeated ON operations when the ON operation of the tele switch 79T is repeated in a short period.
- FIG. 6 shows the state in which the movable lens moves to the target step position determined according to the number N of repetitions of the ON operation of the tele switch 79T and the duration T, and when the movable lens moves to the tele side.
- FIG. 6 is a diagram illustrating the state of movement of the movable lens when the wide-side switch 79W is turned on (reversed).
- the number N of repetitions of the ON operation of the tele switch 79T is 1 and the normal ON operation is performed will be described.
- the current step position of the movable lens is SP1 (unit movement position Pos0) and is stopped.
- a normal on operation with a duration T less than the threshold T2 is performed as the first on operation for the tele-side switch 79T.
- the number of repetitions N is 1 without a subsequent on operation being performed.
- the control circuit 90 detects the first ON operation (high level voltage signal), it sets the number of repetitions N to 1 at that time. Then, the target step position is determined as the tele-side step position SP2 (unit movement position Pos2) by one step corresponding to the number of repetitions N with respect to the current step position SP1.
- the target step position is determined to be the step position SP2
- a drive instruction for moving the movable lens to the target step position SP2 is given to the motor drive circuit 92 without waiting for the completion of the first ON operation.
- the control circuit 90 confirms that the duration T of the first ON operation is less than the threshold T2, the control circuit 90 does not change the target step position as described later. As a result, the movable lens moves to the step position SP2 and stops as shown in FIG.
- the movable lens can be moved to the tele side by one step.
- the number of repetitions N of the ON operation of the tele switch 79T is 1, and a long press ON operation is performed.
- the current step position of the movable lens is SP1 (unit movement position Pos0) and is stopped.
- the long-press ON operation with the duration T equal to or greater than the threshold T2 is performed as the first ON operation on the tele-side switch 79T.
- the number of repetitions N is 1 without a subsequent on operation being performed.
- the control circuit 90 when the control circuit 90 detects the first ON operation, the control circuit 90 sets the repeat count N to 1 at that time. Then, the target step position is determined as the tele-side step position SP2 (unit movement position Pos2) by one step corresponding to the number of repetitions N with respect to the current step position SP1. When the target step position is determined to be the step position SP2, a drive instruction for moving the movable lens to the target step position SP2 is given to the motor drive circuit 92 without waiting for the completion of the first ON operation.
- the control circuit 90 confirms that the duration T of the first ON operation is equal to or greater than the threshold value T2
- the target step position is changed from SP2 to SP4 (unit movement position Pos7) at the tele end.
- a drive instruction for moving the movable lens to the target step position SP4 is given to the motor drive circuit 92.
- the movable lens moves to the step position SP4 and stops as shown in FIG.
- the threshold value T2 is shorter than the minimum output time of the drive signal for moving the movable lens by the unit movement amount, and when it is confirmed that the duration T of the first ON operation is equal to or more than the threshold value T2,
- the movable lens is moved to the tele side toward the target step position SP2 at that time.
- the control circuit 90 extends the drive signal output time set by the motor drive circuit 92 without waiting for the movement to the step position SP2 to end. That is, the output time of the drive signal required to move the movable lens from the current target step position SP2 to the new target step position SP4 is extended by five times the minimum output time. Thereby, the target step position is changed while continuing the movement of the movable lens.
- the movable lens is started to move toward the tele side without waiting for the completion of the first on operation.
- the movable lens is not moved until it is confirmed whether or not it is long-pressed (whether or not the duration time T is equal to or greater than the threshold T2).
- the movement may be started.
- the movable lens moves to the step position SP4 which is the tele end by the same long pressing ON operation.
- the movable lens can be moved from an arbitrary position to the step position SP4 that is the tele-side end by one ON operation.
- the control circuit 90 when the control circuit 90 detects the first ON operation, the control circuit 90 sets the repeat count N to 1 at that time. Then, the target step position is determined as the tele-side step position SP2 (unit movement position Pos2) by one step corresponding to the number of repetitions N with respect to the current step position SP1. When the target step position is determined to be the step position SP2, a drive instruction for moving the movable lens to the target step position SP2 is given to the motor drive circuit 92 without waiting for the completion of the first ON operation.
- the control circuit 90 detects the second repeated ON operation
- the control circuit 90 changes the number of repetitions N to 2 at that time.
- the target step position is changed to the tele-side step position SP3 (unit movement position Pos5) by two steps corresponding to the number of repetitions N with respect to the step position SP1 when the first on operation is detected.
- a drive instruction for moving the movable lens to the target step position SP3 is given to the motor drive circuit 92.
- the movable lens moves to the step position SP3 and stops as shown in FIG.
- the movable lens moves to the tele-side step position SP4 by two steps by the same ON operation with the repetition count N of 2.
- the second on-operation is invalid as described above, but the first on-operation is valid, so the movable lens is at the tele end step position. Move to SP4.
- the second on operation is invalidated and the movable lens is moved to the step position SP4, which is the tele end, as in FIG. 6D.
- the second on operation is a long press
- the movable lens may be moved to the step position SP4 which is the tele end as in FIG. 6D.
- the first long press on operation may be regarded as a normal on operation.
- the movable lens when the first on-operation is detected without waiting for the first on-operation to be completed, the movable lens is started to move toward the tele side.
- the movable lens may not be moved until it is fixed, and the movement to the step position corresponding to the repetition number N may be started after the repetition number N is determined.
- the movable lens is moved by two steps to the tele side by further turning on the tele switch 79T after the movable lens has moved by one step.
- the movable lens can be moved to the tele side by two steps by one continuous ON operation.
- the control circuit 90 detects the first ON operation (high level voltage signal), it sets the number of repetitions N to 1 at that time. Then, the target step position is determined as the tele-side step position SP2 (unit movement position Pos2) by one step corresponding to the number of repetitions N with respect to the current step position SP1.
- the target step position is determined to be the step position SP2
- a drive instruction for moving the movable lens to the target step position SP2 is given to the motor drive circuit 92 without waiting for the completion of the first ON operation.
- the control circuit 90 detects the second repeated ON operation, the control circuit 90 changes the number of repetitions N to 2 at that time. Then, the target step position is changed to the tele-side step position SP3 (unit movement position Pos5) by two steps corresponding to the number of repetitions N with respect to the step position SP1 when the first on operation is detected. Then, a drive instruction for moving the movable lens to the target step position SP3 is given to the motor drive circuit 92.
- control circuit 90 detects the third repeated ON operation
- the control circuit 90 changes the repeat count N to 3 at that time.
- the target step position is changed to the tele-side step position SP4 (unit movement position Pos7) by three steps corresponding to the number of repetitions N with respect to the step position SP1 when the first on operation is detected.
- a drive instruction for moving the movable lens to the target step position SP4 is given to the motor drive circuit 92.
- the movable lens moves to the step position SP4 and stops as shown in FIG.
- step position SP4 which is the tele end.
- the second and subsequent on operations are invalidated and the movable lens is moved to the telephoto end as in FIG. Is moved to step position SP4.
- the second and subsequent on operations are long-pressed, it is assumed that a normal on operation has been performed (only the duration T of the first on operation is considered).
- the movable lens may be moved to the step position SP4 that is the telephoto end as in FIG. 6D.
- the first long press on operation may be regarded as a normal on operation.
- the movable lens is moved to the tele side by three steps by turning on the tele switch 79T each time the movable lens is moved by the tele side by one step.
- the movable lens can be moved to the tele side by three steps by one continuous ON operation.
- the ON operation of the number of repetitions N means that the movable lens is moved by the same number of steps as the number of repetitions N.
- the number of step positions is four (SP1 to SP4), so an ON operation with a repetition count N of 4 or more is not effective, but the number of step positions can be arbitrarily set and changed.
- the effective number of repetitions N varies depending on the value.
- the first normal ON operation or long press ON operation is performed on the tele-side switch 79T.
- the first normal ON operation or the long-press ON operation means an ON operation after the duration of the OFF operation becomes equal to or greater than the threshold T1 as described above.
- the control circuit 90 when detecting the first ON operation (high level voltage signal), changes the target step position from the previous target step position to the step position SP4 that is the tele end. . Then, a drive instruction for moving the movable lens to the target step position SP4 is given to the motor drive circuit 92. As a result, the movable lens moves to the step position SP4 and stops as shown in FIG.
- the tele-side switch 79T having the repetition count N of 3 is turned on, and the movable lens moves from the step position SP1 to the step position SP4. It is assumed that it is moving to the tele side. However, if the movable lens is moving to the tele side, the same processing as the following processing is performed.
- the control circuit 90 when detecting the ON operation, the control circuit 90 maintains the target step position at the current target step position, that is, the step position SP4 in the example of FIG. Wait until SP4 is reached.
- the step position at the start of movement in the movement of the movable lens when the ON operation of the wide side switch 79W is detected that is, the step position in the example of FIG. SP1 is determined as the target step position.
- a drive instruction for moving the movable lens to the target step position SP1 is given to the motor drive circuit 92.
- the movable lens moves to the step position SP4 and then moves to the original step position SP1 before the movement and stops as shown in FIG.
- the wide-side switch 79W is turned on to restore the movable lens to the original position. Can be returned in position.
- FIG. 6 (G) similarly to FIG. 6 (F) (FIG. 6 (C)), the tele-side switch 79T having the repetition count N of 3 is turned on, and the movable lens is moved to the step position SP1. Suppose that it is moving to the tele position toward step position SP4. However, if the movable lens is moving to the tele side, the same processing as the following processing is performed.
- the control circuit 90 when detecting the ON operation, the control circuit 90 maintains the target step position at the current target step position, that is, the step position SP4 in the example of FIG. Wait until SP4 is reached.
- the wide-side step position SP3 is determined as the target step position by one step with respect to the target step position SP4. Then, a drive instruction for moving the movable lens to the target step position SP3 is given to the motor drive circuit 92. As a result, the movable lens moves to the step position SP4 as shown in FIG. 5G, and then moves to the step position SP3 on the wide side for one step and stops.
- the wide-side switch 79W is turned on, thereby moving the movable lens to the tele side. It can be returned to the wide side by one step from the target step position when it is moved to the side.
- the tele-side switch 79T with the number of repetitions N of 3 is turned on to move the movable lens. Is moved from the step position SP1 toward the step position SP4 toward the tele side. However, if the movable lens is moving to the tele side, the same processing as the following processing is performed.
- the control circuit 90 when detecting the ON operation, the control circuit 90 maintains the target step position at the current target step position, that is, the step position SP4 in the example of FIG. Wait until SP4 is reached.
- the step position closest to the wide side with respect to the position of the movable lens when the ON operation of the wide side switch 79W is detected that is, in FIG.
- the step position SP2 is determined as the target step position.
- a drive instruction for moving the movable lens to the target step position SP2 is given to the motor drive circuit 92.
- the movable lens moves to the step position SP4 and then moves to the step position SP2 and stops as shown in FIG.
- the wide switch 79W is turned on to turn on the telephoto switch 79T.
- the movable lens can be set at substantially the same position as the current position.
- the wide-side switch 79W is turned on instead of returning to the step position when the wide-side switch 79W is turned on after moving to the target step position when the movable lens is moving to the tele side. It may be stopped at any position (step position or unit movement position) between the movable lens position at that time and the target step position at that time and returned to the wide side.
- the movement of the movable lens is also performed when the wide-side switch 79W when the movable lens is stopped, and when the wide-side switch 79W or the tele-side switch 79T is turned on when the movable lens is moved to the wide side. It is exactly the same except that the directions are different.
- the movable lenses (first movable lens 22 and second movable lens 23) of the photographing lens unit 11 (objective optical system) in the photographing unit 10 of the endoscope 60 are moved by driving the DC motor.
- the movable lens may be moved by a piezoelectric actuator using a piezoelectric element, or a stepping motor may be used.
- the mechanism for moving the movable lens does not have to use a cam mechanism as in this embodiment.
- the present invention can be applied to control (operation) of an arbitrary movable lens, such as a movable lens for changing focus, even if it is not related to a movable lens for changing zoom magnification.
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Abstract
Description
Claims (12)
- 内視鏡の対物光学系を構成する可動のレンズと、
前記レンズを電動駆動するレンズ駆動手段と、
操作者のオン操作とオフ操作とに対応した操作信号を出力する操作手段と、
前記レンズを複数のステップ位置のうちのいずれかに移動させるレンズ制御手段であって、前記操作信号に基づいて、前記オン操作が行われたときの前記オン操作の継続時間と、前記オン操作と前記オフ操作とが連続的に繰り返されたときのオン操作の繰返回数を検出し、該検出した前記オン操作の継続時間及び繰返回数に基づいて、前記レンズを移動させるステップ位置を決定するレンズ制御手段と、
を備えた内視鏡装置。 - 前記レンズ制御手段は、前記オフ操作の継続時間が閾値T1以上となった後の前記オン操作を1回目のオン操作として前記オン操作の繰返回数を1とし、前記オン操作の後の前記オフ操作の継続時間が閾値T1未満のときに前記オン操作が行われると、前記オン操作の繰返回数を1増加させる請求項1に記載の内視鏡装置。
- 前記レンズ制御手段は、前記レンズの停止時において、前記1回目のオン操作を検出すると、前記操作手段に対応して予め決められた移動方向への前記レンズの移動を開始させた後、該検出した1回目のオン操作を含む前記オン操作の繰返回数に相当するステップ分だけ前記停止時のステップ位置から前記移動方向に離れたステップ位置まで前記レンズを移動させる請求項2に記載の内視鏡装置。
- 前記レンズ制御手段は、前記レンズの停止時において、前記1回目のオン操作を検出すると、該1回目のオン操作の継続時間が閾値T2以上であった場合には、該1回目のオン操作の検出により前記操作手段に対応して予め決められた移動方向への前記レンズの移動を開始させた後、前記移動方向の端となるステップ位置まで前記レンズを移動させる請求項2、又は3に記載の内視鏡装置。
- 前記レンズ制御手段は、前記レンズを前記操作手段に対応して予め決められた移動方向に移動させている際に、前記1回目のオン操作を検出すると、前記移動方向の端となるステップ位置まで前記レンズを移動させる請求項2、3、又は4に記載の内視鏡装置。
- 操作者のオン操作とオフ操作とに対応した操作信号を出力する反転操作手段を備え、
前記レンズ制御手段は、前記レンズを前記操作手段に対応して予め決められた移動方向に移動させている際に、前記反転操作手段によるオン操作を検出すると、前記レンズを移動開始時のステップ位置に移動させる請求項2から5のいずれか1項に記載の内視鏡装置。 - 操作者のオン操作とオフ操作とに対応した操作信号を出力する反転操作手段を備え、
前記レンズ制御手段は、前記レンズを目標のステップ位置に移動させるために前記操作手段に対応して予め決められた移動方向に移動させている際に、前記反転操作手段によるオン操作を検出すると、前記レンズを前記目標のステップ位置まで移動させた後、前記レンズを目標の位置から1ステップ分だけ前記移動方向の反対方向に離れたステップ位置に前記レンズを移動させる請求項2から5のいずれか1項に記載の内視鏡装置。 - 操作者のオン操作とオフ操作とに対応した操作信号を出力する反転操作手段を備え、
前記レンズ制御手段は、前記レンズを目標のステップ位置に移動させるために前記操作手段に対応して予め決められた移動方向に移動させている際に、前記反転操作手段によるオン操作を検出すると、前記反転操作手段によるオン操作の検出時における前記レンズの位置に対して前記移動方向の反対方向に最も近いステップ位置に前記レンズを移動させる請求項2から5のいずれか1項に記載の内視鏡装置。 - 前記レンズ駆動手段は、直流モータにより前記レンズを駆動する手段である請求項1から8のいずれか1項に記載の内視鏡装置。
- 前記操作手段は、前記オン操作としてスイッチの押下操作に対応した操作信号を出力する手段である請求項1から9のいずれか1項に記載の内視鏡装置。
- 前記レンズ制御手段は、前記レンズ駆動手段に対して与える駆動指示により前記レンズを最小単位の移動量により移動させたときに設定可能な位置に対して、前記ステップ位置の各々を対応付けるルックアップテーブルを有し、該ルックアップテーブルを参照して前記レンズを目的のステップ位置に移動させる請求項1から10のいずれか1項に記載の内視鏡装置。
- 前記レンズは、対物光学系のズーム倍率を可変するためのレンズであり、前記ステップ位置は、予め決められたズーム倍率に設定するための前記レンズの位置である請求項1から11のいずれか1項に記載の内視鏡装置。
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CN201580016396.1A CN106132274B (zh) | 2014-03-28 | 2015-02-13 | 内窥镜装置 |
JP2016510110A JP6140362B2 (ja) | 2014-03-28 | 2015-02-13 | 内視鏡装置 |
US15/259,710 US10422988B2 (en) | 2014-03-28 | 2016-09-08 | Endoscope apparatus |
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JPWO2019235010A1 (ja) * | 2018-06-05 | 2021-06-03 | オリンパス株式会社 | 内視鏡 |
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WO2020026493A1 (ja) * | 2018-07-30 | 2020-02-06 | オリンパス株式会社 | 内視鏡装置、駆動方法およびプログラム |
CN109709503B (zh) | 2019-02-13 | 2021-03-23 | 上海联影医疗科技股份有限公司 | 一种磁共振系统控制方法、磁共振系统、计算机设备 |
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