JP2001174714A - Endoscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an endoscopic device which displays information on accurate observation object part even to different kinds of endoscopes having different kinds of actuators or image pickup optical systems. SOLUTION: The endoscopic device 1 is comprised of an endoscope 2, a zoom controller 6, and a CCU 4, and the endoscope 2 is provided with an image pickup system having a zoom lens 38 in an insertion part front end part 13, a connection arm 69 to which the zoom lens 38 is connected and which is driven by an actuator 39, and a magnification information storage part 72 where magnification information of the image pickup system is stored, and the zoom controller 6 is freely attachably and detachably connected to the endoscope 2 and controls driving of the actuator 39, and the CCU 4 is provided with a video signal processing circuit 37, which processes an image pickup signal from the image pickup optical system to display an observation picture on a color monitor 5, and a sizperimposing circuit 71 (correction means) which corrects information for calculation of the size of the observation picture displayed on the color monitor in accordance with magnification information transmitted from the zoom controller 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope apparatus in which a lens provided at the distal end of an insertion portion is moved by an actuator to change the magnification.

[0002]

2. Description of the Related Art In recent years, endoscope apparatuses have been widely used in the medical and industrial fields. For example, in the endoscope device described in Japanese Patent Application Laid-Open No. 9-322566, a part of an objective lens is configured by a moving lens, and the moving lens is connected to a moving object that is moved by an actuator. There has been proposed one that changes the magnification of an observation image by moving a moving lens.

[0003] In the endoscope apparatus having such a configuration, routine inspection and close observation can be performed by changing the magnification of an observation image with a single endoscope, which is convenient. Knowing the size of the tissue at the site to be observed has medical utility such as diagnosing a lesion. Further, by displaying information on the size of the observed part on the monitor, the size of the observed part in the observation image can be calculated, and accurate diagnosis can be easily performed.

[0004]

However, the endoscope used in the endoscope apparatus having such a configuration is provided on the distal end side or the thickness of the distal end of the insertion portion inserted into the body cavity depending on the use. Since the viewing angle of the imaging optical system is also different, the amount of movement of the actuator and the magnification are different for each endoscope, and there is a problem that the information on the size of the observed part converted from the movement distance of the actuator is not accurate. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended to accurately display information of a part to be observed even for different types of endoscopes having different types of actuators and imaging optical systems. It is an object to provide an endoscope apparatus.

[0006]

According to a first aspect of the present invention, there is provided an endoscope apparatus having an imaging optical system having a movable lens at the distal end of an insertion portion.
An endoscope to which the moving lens is connected and which has a driven body driven by an actuator and a magnification information storage unit which stores magnification information of the imaging optical system, and which is detachably connected to the endoscope; Control means for driving and controlling the actuator based on magnification information of the imaging optical system transmitted from the information storage means; and an image for processing an imaging signal from the imaging optical system to display an observation image on a monitor A signal processing unit; and a correction unit configured to correct information for calculating a size of an observation image displayed on the monitor in accordance with magnification information transmitted from the control unit. According to a second aspect of the present invention, in the endoscope apparatus according to the first aspect, the correcting unit displays an observation image displayed on the monitor in accordance with a shape of the monitor input by the input unit. It is characterized in that information for calculating the size of is corrected. With this configuration, it is possible to realize an endoscope apparatus that displays accurate information on a part to be observed even for different types of endoscopes having different types of actuators and imaging optical systems.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment will be described. 1 to 10 show one embodiment of the present invention.
FIG. 1 is an external view showing an entire configuration of an endoscope apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view showing an internal configuration of the endoscope apparatus of FIG. 1, and FIG. FIG. 4 is an explanatory sectional view showing a structure of an actuator provided at the distal end portion of the endoscope, FIG. 4 is an explanatory view showing a waveform of a drive signal, and FIG. 4 (a) shows a drive signal obtained by performing full-wave rectification of a sine wave. Waveform diagram, FIG. 4 (b)
FIG. 5A is a waveform diagram showing a drive signal obtained by inverting the waveform of FIG. 5A, and FIG. 5 is an explanatory diagram showing a monitor screen showing an endoscope image and magnification information on the monitor screen. FIG. 5B is an explanatory diagram showing a monitor screen when a magnification and an error are displayed on a monitor, FIG. 5B is an explanatory diagram showing a monitor screen when a scale and an error are displayed on a monitor, and FIG. FIG. 6A is an explanatory diagram illustrating a display example of a setting screen for setting a size, and FIG. 6A is an explanatory diagram illustrating a display example of a setting screen when a monitor size is input using the ten keys on a keyboard.
FIG. 7B is an explanatory diagram illustrating a display example of a setting screen when selecting a monitor size using a cursor of a keyboard, FIG. 7 is an explanatory diagram illustrating a configuration of an image display system of an endoscope apparatus, and FIG. FIG. 8A is an explanatory diagram showing a display example of an image display method by the image display system of FIG. 7, and FIG. 8A is a diagram showing a case where a reference screen and an endoscope observation screen are displayed side by side at the same size on a color monitor. FIG. 8B is an explanatory view showing a case where the size of the reference screen is different from that of the endoscope observation screen, and FIG.
Is a circuit block diagram showing a conventional connection between the endoscope and the CCU, and FIG. 10 is a circuit block diagram when the endoscope and the CCU are connected by serial communication.

An endoscope apparatus 1 according to one embodiment of the present invention shown in FIGS. 1 and 2 has a zoom type electronic endoscope (hereinafter, referred to as a zoom type endoscope) having a zoom function (adjustable to an arbitrary magnification from an enlargement to a wide angle). A light source device 3 that supplies illumination light to a light guide 31 of the endoscope 2, and a camera control unit (C) that performs signal processing on image pickup means.
CU) 4, a color monitor 5 for displaying a video signal output from the CCU 4, a zoom control device 6 for performing enlargement / wide-angle control (also simply referred to as zoom control), and connected to the zoom control device 6. And a foot switch 7.

The endoscope 2 has an elongated insertion portion 7 to be inserted into a patient's body or the like, an operation portion 9 provided at a base end of the insertion portion 8, and one end extending from the operation portion 9. It has a universal cord 11, and a connector 12 provided at the other end of the universal cord 11 can be detachably connected to the light source device 3. The insertion portion 8 is a hard distal end portion 1 having a built-in imaging means.
3, a bendable portion 14 provided at the rear end of the distal end portion 13 and a flexible tube portion 15 having flexibility provided at the rear end of the bent portion. Can be bent by operating a bending operation knob 16 provided on the operation unit 9.

A video cable 17 is connected to the connector 12.
The connector 18 at one end of the video cable 17 is connected, and the connector 19 at the other end of the video cable 17 is detachably connected to the CCU 4. One end of a zoom cable 20 is detachably connected to the connector 12. A zoom connector 21 at the other end of the zoom cable 20 is connected to one end of a connection cable 23 via a connection connector 22.
A connector 24 at the other end of 3 is detachably connected to the zoom control device 6.

A foot switch connector provided at the other end of the connection cord 26 having one end connected to the foot switch 7 is detachably connected to the zoom control device 6. The foot switch 7 includes an enlargement operation foot switch 7a, a wide angle operation foot switch 7b, and a speed adjustment switch 7c.
Are provided. Further, for example, a remote control switch 28 mounted on the flexible tube section 15 is connected to the zoom control device 6 via a connection cord 29, and the remote control switch 28 also has an enlargement operation switch 28a and a wide-angle operation switch 2
8b.

As shown in FIG. 2, a light guide fiber 31 is inserted into the endoscope 2 and the connector 12 is connected to the light source device 3 so that the illumination light from the lamp 32 in the light source device 3 is transmitted to the light guide. The illumination light is incident on the incident end of one end of the fiber 31, and this illumination light is transmitted, emitted through the illumination lens 33 at the tip of the insertion section 8, and illuminates a subject such as an affected part. An observation lens (or imaging window) provided adjacent to the illumination window to which the illumination lens 33 is attached is provided with an objective lens system 34 as an imaging optical system, and an imaging device, more specifically, a solid-state imaging device For example, an imaging means for capturing an image of a subject is formed by connecting an optical image of the subject illuminated by a charge-coupled device (hereinafter abbreviated as CCD) 35.

An image signal picked up by the CCD 35 is amplified by a preamplifier 36 and then input to a video signal processing circuit 37 in the CCU 4 via a video cable 17 to generate a standard image signal. The image is input to the color monitor 5 via a monitor cable, and an image of the subject is displayed as an endoscope image in an image display area 51 on the monitor screen (display surface).

The CCU 4 is provided with a superimpose circuit 71 for displaying the size of the tissue in the endoscope image or information for calculating the size in the image display area 51. The information such as the size or the size of the tissue in the endoscope image calculated by the superimpose circuit 71 is combined with the endoscope image by the video signal processing circuit 37.

In the present embodiment, the size of the tissue in the endoscopic image or the information for calculating the size is corrected according to the magnification information transmitted from the zoom control device 6 to the superimpose circuit 71. Make up.

The objective lens system 34 is provided with a zoom lens 38 for changing the magnification by arranging a part of, for example, a convex lens so as to be movable in the optical axis direction as indicated by an arrow. The zoom lens 38 differs from a general so-called zoom lens (the focus point does not change even when the magnification is changed), and the focal point changes when the magnification is changed (this is a zoom lens). Also,
When the magnification is changed, for example, the depth of field is 5 to 10 on the wide angle side.
At 0 mm, the depth of field changes from 2 to 5 mm on the magnification side. An actuator 39 for moving the zoom lens 38 in the optical axis direction is provided at the distal end portion 13. The actuator 39 is driven by a drive signal from a drive circuit 40 provided in the zoom control device 6.

FIG. 3 shows a specific structure of the actuator 39. An actuator 39 is housed in an actuator housing 63 provided adjacent to the observation window 62 of the distal end body 61 constituting the distal end portion 13.

A circular tube (cylinder) 64 fixed to the actuator accommodating portion 63 has a circular tube or a cylindrical shape having an outer diameter fitted to the inner peripheral surface thereof and parallel to the optical axis.
An output shaft 39a is mounted at the center of the front end of the movable body 65, and a central mounting hole at the rear end face of the movable body 65 has a piezoelectric body having piezoelectric characteristics. The front end of the body 67 is fixed.

The movable body 65 has a plurality of legs 65a elastically outwardly expanded so as to press against the inner peripheral surface of the circular tube 64.
Are provided so as to form a cylindrical shape, and each leg 65a
The rear convex portion is pressed against the inner peripheral surface of the circular tube 64 so that a frictional force acts between them. Therefore, when a force that moves the moving body 65 with a force smaller than the frictional force acts, the movement of the moving body 65 is suppressed, and a force that moves the moving body 65 with a force larger than the frictional force acts. In this case, the moving body 65 moves overcoming the frictional force. In the present embodiment, in order to generate a force larger than the frictional force, a drive signal having a sharply changing waveform is applied to the actuator 3.
9 is adopted.

A signal line 68 is connected to the electrode of the piezoelectric body 67 whose front end is attached to the moving body 65, and the signal line 68 is connected to the drive circuit 40 in the zoom control device 6, and the drive circuit 40 Is driven by the drive signal output from.

The output shaft 39a is connected to one end of a connection arm 69 which is a driven body driven by the actuator 39, and is movable with the other end of the connection arm 69 or a zoom lens 38 attached thereto. For example, it is integrally connected to the lens frame 70.

The movable lens frame 70 on which the zoom lens 38 is mounted is moved in the optical axis direction via the connecting arm 69 together with the output shaft 39a of the actuator 39 by driving the actuator 39, and is moved to the wide angle side and the enlargement side. You can move settings.

The piezoelectric body 67 is formed by laminating ceramic piezoelectric members such as barium titanate, lead zirconate titanate, and porcelain, and providing electrodes thereon. The drive circuit 40 generates a drive signal as shown in FIG. 4, and the piezoelectric body 67 mechanically expands or contracts in a direction parallel to the optical axis in FIG. 3 by application of the drive signal. The actuator 39 is moved using this force.

More specifically, the driving circuit 40 is configured as shown in FIG.
A drive signal (also referred to as a first drive signal) having a waveform obtained by performing full-wave rectification on a sine wave as shown in FIG. 4A and an inversion of the waveform of FIG. 4A as shown in FIG. A driving signal having such a waveform (also referred to as a second driving signal) is generated.

These waveforms include a waveform portion that slowly expands or contracts the piezoelectric body 67 over time, and a waveform portion that expands or contracts sharply. For example, when the first drive signal is applied to the piezoelectric body 67, the time differential waveform of the voltage is discontinuously inverted (in this case, the piezoelectric body 67 changes from a contracting direction to a suddenly extending direction). , Moving body 6
Reference numeral 5 moves to the right in FIG. 3, for example, about several microns per one cycle of the drive signal.

The movement of the moving body 65 also moves the actuator 39 to the right in FIG.
With the movement of 9, the zoom lens 38 also moves to the right,
In this case, the objective lens system 34 is in a lens state that is larger than before the movement.

On the other hand, when the second drive signal is applied to the piezoelectric body 67, the actuator 39 is moved to the left in FIG. 3, and together with the movement of the actuator 39, the zoom lens 38 is also moved to the left. In this case, the objective lens system 34 enters the wide-angle lens state.

Then, a minute distance is moved in one cycle of the drive signal shown in FIG. 4A or 4B, and the number of drive signals is set to a predetermined number by using one cycle of the drive signal as a unit. It is designed to move step by step.

As shown in FIGS. 1 and 2, the operation section 9 is provided with a zoom switch 42 as an actuator operation switch. As shown in FIG. 2, the output signal of the zoom switch 42 is input to a control circuit 43 provided in the zoom control device 6. An output signal (switch signal) of the operation of the foot switch 7 is also input to the control circuit 43 in the zoom control device 6. The switch signal of the remote control switch 28 is also input to the control circuit 43. The zoom switch 42, the foot switch 7 and the remote control switch 28 form a remote switch connected to the zoom control device 6 by a cable or the like and provided at a separated position.

When the zoom switch 42 is depressed from the neutral point, one of the enlargement operation switches is depressed, and the other wide-angle operation switch is depressed on the enlargement side (Tele side or less, T direction). ) Are formed by two switches for outputting each instruction signal.

In the present embodiment, the following Tables 1 and 2
A magnification information storage section 72 such as a ROM in which drive signals and data relating to magnification are stored in advance is built in the endoscope 2 according to different types of endoscopes having different types of actuators and imaging optical systems as shown in FIG. ing. The data is data representing the number of pulses, display magnification, and accuracy as shown in Tables 1 and 2, for example.

[0032]

[Table 1]

[Table 2] It should be noted that the absence of magnification and precision data from 0 to 4999 indicates that the endoscope 2 has a large field advance and the distance between the objective lens system 34 and the subject when the magnification is low due to the characteristics of the optical system. However, since observation is possible in the range of, for example, 10 mm to 100 mm, the precision of the magnification display is too high and the display does not make sense.

When the endoscope 2 having the magnification information storage section 72 storing such data is connected to the zoom control apparatus 6 and the power of the zoom control apparatus 6 is turned on, the drive signal and the drive signal are transmitted from the magnification information storage section 72. Data relating to the magnification is output to the zoom control device 6.

At the same time, the zoom control device 6 controls the control circuit 43 to initialize the position of the actuator 39.
The CPU (not shown) executes the drive circuit 4 as an initial setting process according to an initial setting program stored in the storage unit 45.
For 0, a control signal for setting the zoom lens 38 to the position on the widest angle is output. Then, the drive circuit 40 outputs the drive signal shown in FIG. 4B to the actuator 39 to set the actuator at the widest position.

Here, when the surgeon presses the remote switch, the drive signal shown in FIG. 4 is output in proportion to the time when the remote switch is pressed. When the enlargement operation switch is pressed, the drive waveform shown in FIG. 4A is output, and when the wide angle operation switch is pressed, the drive waveform shown in FIG. 4B is output.

The number of pulses of these drive signals is determined by the control circuit 4
Counted at 3. The number of pulses is set to 0 when the power is turned on and initialization is performed. When the pulse on the enlargement side is output, it is counted as positive, and when the pulse on the wide angle side is output, it is counted as negative. When the count is negative, the count is set to 0 because the actuator 39 is at the widest position.

Then, the counted number is stored in the magnification information storage section 72.
If the data matches the data read from the
Is applied to the superimpose circuit 71 in the CCU4,
Send accuracy data.

The superimpose circuit 71 corrects information such as the size or size of a tissue in an endoscope image in accordance with magnification information such as magnification and precision data transmitted from the zoom control device 6. Video signal processing circuit 37
Output to The video signal processing circuit 37 combines information such as the size or size of the tissue in the endoscope image corrected by the superimposition circuit 71 with the endoscope image as shown in FIG. .

FIG. 5A shows the magnification of the subject on the monitor. For example, a subject of 1 mm is displayed on the monitor with a size of 90 mm and an error of ± 10% since the subject is 90 times. In FIG. 5B, the scale is displayed on the monitor. In this case, it is easy to know how large the measurement of the size of the subject is, including errors.

As a result, the magnification can be accurately displayed by reading the magnification information such as the drive pulse and the data relating to the magnification stored in the magnification information storage unit incorporated in the endoscope 2. is there.

The color monitor 5 often has a fixed size due to the system configuration, but a large color monitor 5 may be used in hospital facilities. In the display method shown in FIG. 5A, the size at which the subject is displayed differs depending on the size of the monitor. Therefore, as a means for correcting this, the size of the color monitor 5 is inputted by the keyboard 74 connected to the CCU 4, and the magnification is displayed by the size of the color monitor 5 inputted by the superimposing circuit 71 of the CCU 4. It may be configured to correct the value.

For input of the size of the color monitor 5, for example, the size of the color monitor 5 is input by using the ten keys (not shown) of the keyboard 74 with respect to the screen display as shown in FIG. Also, for example, the size of the color monitor 5 described on the screen as shown in FIG. 6B may be selected using a cursor (not shown) on the keyboard 74.

As described above, using an endoscope apparatus which enlarges an endoscope image by changing the magnification is an effective means for knowing the detailed state and shape of a lesion. In the diagnosis of early cancer in colorectal examination, changes in the duct opening are important information for diagnosis of early cancer.

However, since beginners have little experience, even if an image in which the duct opening is changed due to enlargement of the endoscopic image is obtained, it is difficult to determine whether the image is likely to be early cancer. For example, it may be difficult to make a decision on the spot unless it is compared with a medical-related book.

In such a case, the image data to be referred to in the endoscopic image can be displayed on the monitor simultaneously with the image data under observation so that the diagnosis can be performed more quickly and with high accuracy. Constitute.

As shown in FIG. 7, the video signal of the endoscope image of the CCU 4 and the video signal output of the reference image storage device 81 are:
The video signal is input to the image duplication unit 80, and the image duplication unit 80 overlaps these two video signals and
Output.

The overlap between the endoscope screen and the video signal can be switched by a switch (not shown) provided on the operation section of the endoscope or a switch on an operation panel for centrally controlling the system. When there is no overlap, only the currently observed endoscope image is displayed on the monitor.

When it is desired to refer to what kind of classification is similar to the currently viewed endoscopic image, the reference screen and the currently observed endoscopic screen are overlapped on the color monitor as shown in FIG. You can do it. FIG. 8A shows a case where the reference screen and the endoscope observation screen are displayed side by side on the color monitor in the same size, and "REFERENC" is used to distinguish which reference screen is used.
E ". FIG. 8B illustrates a case where the size of the reference screen and the size of the endoscope observation screen are different. For example, the reference screen is displayed on a small screen.
Here, a plurality of reference screens are provided in the reference image storage device 81, and necessary screens can be selected.

The signal line of the operation switch 91 provided on the endoscope operation section 9 is connected to the C through the video cable 17.
By being connected to the CU 4 and depressing the operation switch 91, the functions of the CCU 4 such as resting, releasing the rest, dimming, and enhancing the contour of the endoscope screen can be operated.

As shown in FIG.
The respective signal lines pass through the video cable 17 for each of the switches 91a to 91d, and are connected to the CCU 4. Since the endoscope 4 is a patient circuit, the CCU 4 is insulated from the secondary circuit via the photocoupler 86 to ensure insulation. The terminals of each signal line of the primary circuit are connected to the photocoupler 8 via resistors R1a to R1d.
6 are connected to input ports of a control unit (not shown) for controlling the CCU 4 via resistors R2a to R2d on the secondary circuit side of the photocoupler 86, respectively.

In recent years, the multifunctionality of the endoscope 2 has been advanced, and the amount of information from the endoscope 2 to the CCU 4 has increased as the function of the endoscope has increased. For this reason, control signals and the like increase with an increase in the amount of information. Therefore, it is necessary to increase the number of signal pins of the video cable 17 connected to the CCU 4.

However, if the number of signal pins of the video cable 17 is increased, there is a problem that the video cable 17 cannot be connected to the endoscope 2 and compatibility cannot be ensured. Therefore, as shown in FIG. 10, the configuration is such that compatibility can be ensured even when a new function is added.

As shown in FIG.
And an operation switch 91 provided on the operation unit is connected to a PIO (parallel I / O) of the CPU 92. In FIG. 10, for example, four operation switches 91a
To 91d are connected to the PIO. And CPU 9
2 is connected to the CPU 97 of the CCU 4 via a video cable 17 by SIO (serial I / O),
The 97 PIO (parallel I / O) is connected to a photocoupler 86 via switching elements 93 to 96 and resistors R1a to R1d. Operation switch 9
The information on the ON / OFF of 1 is transferred to the CCU 4 by serial communication between the CPUs 92 and 97.

Although the number of signal lines in the video cable 17 is one less than that in FIG. 9, even if the number of operation switches 91 is increased, the signal lines required for switch information are serial communication. The number of signal pins of the video cable 17 does not increase because only three cables are required.
With the above configuration, compatibility can be ensured even when a new function is added without increasing the number of signal pins.

The present invention is not limited to only the above-described embodiments, and can be variously modified without departing from the gist of the invention.

[Supplementary note] (Supplementary note 1) An imaging optical system having a moving lens to be moved at the distal end of the insertion portion, a driven body connected to the moving lens and driven by an actuator, and an imaging optical system. An endoscope having a magnification information storage unit that stores magnification information, and the actuator that is detachably connected to the endoscope and that is based on magnification information of the imaging optical system transmitted from the magnification information storage unit. Control means for controlling driving, image signal processing means for processing an image signal from the imaging optical system to display an observation image on a monitor, and calculating a size of the observation image displayed on the monitor An endoscope apparatus comprising: a correction unit configured to correct information according to magnification information transmitted from the control unit.

(Additional Item 2) The correction means corrects information for calculating the size of an observation image displayed on the monitor according to the shape of the monitor input by the input means. 2. The endoscope apparatus according to claim 1.

(Additional Item 3) An endoscope having an operation switch and a CPU to which a signal is inputted by pressing the operation switch, and the endoscope detachably connected to the endoscope and provided on the endoscope C which transmits and receives key information by serial communication with the CPU by pressing the operation switch.
An endoscope apparatus comprising: an external device having a PU.

(Additional Item 4) The endoscope apparatus according to additional item 3, wherein the external device is an image signal processing device that performs signal processing on an image pickup signal from an image pickup device provided in the endoscope. .

[0060]

As described above, according to the present invention, a highly accurate magnification display is possible even when an endoscope with a different optical system is connected. In addition, an appropriate magnification can be displayed by inputting the size of the monitor regardless of the size of the monitor.

[Brief description of the drawings]

FIG. 1 is an external view showing an entire configuration of an endoscope apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an internal configuration of the endoscope apparatus of FIG. 1;

FIG. 3 is an explanatory cross-sectional view showing a structure of an actuator provided at a distal end portion of the endoscope.

FIG. 4 is an explanatory diagram showing a waveform of a drive signal.

FIG. 5 is an explanatory diagram showing a monitor screen showing an endoscope image and magnification information on the monitor screen;

FIG. 6 is an explanatory diagram showing a display example of a setting screen for setting a monitor size.

FIG. 7 is an explanatory diagram illustrating a configuration of an image display system of the endoscope apparatus.

FIG. 8 is an explanatory diagram showing a display example of an image display method by the image display system of FIG. 7;

FIG. 9 is a circuit block diagram showing a connection between a conventional endoscope and a CCU.

FIG. 10 is a circuit block diagram when the endoscope and the CCU are connected by serial communication.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope apparatus 2 ... Endoscope 3 ... Light source apparatus 4 ... CCU 5 ... Color monitor 5A ... Monitor screen (display surface) 6 ... Zoom control apparatus 7 ... Foot switch 8 ... Insertion part 9 ... Operation part 13 ... Tip Unit 34 Objective lens system 35 CCD 37 Video signal processing circuit 38 Zoom lens 39 Actuator 40 Drive circuit 42 Zoom switch 43 Control circuit 45 Storage unit 51 Image display area 71 Superimpose circuit 72 ... Magnification information storage

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/18 H04N 7/18 MF term (Reference) 2H040 BA03 CA23 DA43 GA02 GA10 GA11 GA12 4C061 AA00 AA29 BB02 CC06 DD03 FF40 JJ18 LL02 NN01 NN05 NN09 PP12 RR06 RR17 RR25 TT12 WW03 WW10 YY14 5C054 CC07 CF05 EH01 FA01 FB03 FE12 FE14 HA12

Claims (2)

[Claims] An imaging optical system having a moving lens to be moved at a distal end of an insertion portion, a moving body connected to the moving lens, a driven body driven by an actuator, and a magnification storing magnification information of the imaging optical system. An endoscope having an information storage unit, a control unit detachably connected to the endoscope, and a drive unit for driving and controlling the actuator based on magnification information of the imaging optical system transmitted from the magnification information storage unit; Image signal processing means for processing an imaging signal from the imaging optical system to display an observation image on a monitor; and information for calculating the size of the observation image displayed on the monitor from the control means. An endoscope apparatus comprising: a correction unit that corrects according to the transmitted magnification information. 2. The apparatus according to claim 1, wherein the correction unit corrects information for calculating a size of an observation image displayed on the monitor according to a shape of the monitor input by the input unit. An endoscope apparatus according to claim 1.