JP2001045472A - Endoscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope device which improves the S/N to improve the image quality of an observed image even though an obstacle exists in a radio wave propagation path. SOLUTION: In this endoscope device, radio waves radiated from a transmitter 3 are received by a receiver 4, and a video signal outputted from the receiver 4 is projected on a monitor device 5. In such a case, the image quality of an observed image is improved because the S/N is improved by the AGC circuit 45 of the receiver 4 even though an obstacle exists in a radio wave propagation path.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope apparatus for transmitting image information obtained by an endoscope to a receiving apparatus by radio waves.

[0002]

2. Description of the Related Art In recent years, endoscope apparatuses have been widely used in which an elongated insertion portion can be inserted into a body cavity or a duct to monitor and monitor a subject image in the body cavity or the duct. Such an endoscope apparatus generally includes an endoscope having an insertion portion inserted into a body cavity or a duct, and is provided separately from the endoscope and supplies illumination light to the endoscope. A light source device, a light guide cable for guiding illumination light from the light source device to the endoscope, and an imaging signal for capturing an image of a subject which is provided in the endoscope or provided detachably. An imaging device for obtaining an image signal, a video processor provided separately from the endoscope and converting an image signal obtained by the endoscope into a video signal that can be displayed on a monitor, and an image signal from the endoscope being converted to the video signal. It comprises a signal cable for transmitting to a processor and a monitor device for displaying a video signal obtained by the video processor. Therefore, the endoscope is connected to an external device by a light guide cable or a signal cable, thereby restricting a moving range of the endoscope and hindering operability of the endoscope.

For example, Japanese Patent Application Laid-Open No. Sho 60-48011 discloses
In the issue, the light guide cable extending from the endoscope is removed by incorporating the illumination light source constituted by the LED (issuing diode) or the like into the endoscope, and the image signal processing is performed on the image signal. A video signal processing circuit that obtains a video signal that can be displayed on a monitor by performing the transmission, a transmission circuit and an antenna that transmit the video signal by radio waves are provided in an endoscope, and a receiving device that receives the radio waves and demodulates the video signal is provided. An endoscope apparatus has been proposed in which a signal cable extending from the endoscope is removed by being provided separately from the endoscope. Such an endoscope apparatus is generally called a wireless endoscope apparatus, and has an advantage that the restriction on the moving range of the endoscope is relaxed and operability is improved.

[0004]

However, in the conventional wireless endoscope apparatus disclosed in, for example, Japanese Patent Application Laid-Open No. Sho 60-48011, image information from the endoscope is transmitted to the receiving apparatus by radio waves. If an obstacle is placed on or passes through the propagation path, the S / N (signal-to-noise ratio) of the video signal obtained by the receiving device deteriorates, and the observation image displayed on the monitor device becomes dark. The image quality deteriorates. Further, in a wireless endoscope apparatus disclosed in, for example, JP-A-60-48011, a video signal processing circuit for obtaining a video signal that can be displayed on a monitor is built in the endoscope. There was a problem of being larger. Conversely, if the video signal processing circuit is removed from the endoscope and the image signal from the image sensor is modulated and transmitted, reset noise is not removed and S
/ N is deteriorated. Further, in the conventional wireless endoscope device, an antenna for transmitting radio waves is provided so as to protrude from the endoscope, and this protruding antenna hinders operability and increases the size of the endoscope. was there. The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the signal-to-noise ratio even if there is an obstacle in the propagation path of a radio wave, to improve the image quality of an observed image, and to use an endoscope. It is an object of the present invention to provide an endoscope apparatus capable of reducing the size of a circuit provided on the side. Also,
Another object of the present invention is to provide an endoscope apparatus which can improve operability and reduce size by removing an antenna projecting from the endoscope side.

[0005]

According to a first aspect of the present invention, there is provided an endoscope apparatus for transmitting image information obtained by an endoscope to a receiving apparatus by radio waves. An imaging unit that is built in or attached to the endoscope to capture an observation image of the endoscope to obtain an imaging signal, and that at least correlative double sampling is performed on the imaging signal that is built in or attached to the endoscope. A first signal processing unit for obtaining a first video signal; a transmitting unit built in or attached to the endoscope for performing frequency modulation on the first video signal to transmit a radio wave; Demodulation means for receiving the radio wave and demodulating the first video signal; and performing at least automatic gain control on the first video signal demodulated by the demodulation means to obtain a second video signal Second letter It is characterized in that a processing unit.

According to a second aspect of the present invention, there is provided an endoscope apparatus for transmitting observation image information obtained by inserting an insertion portion of an endoscope into a body cavity or a duct to a receiving device by radio waves. Imaging means built in or attached to the endoscope to capture an observation image of the endoscope to obtain a video signal, and modulation means built in or attached to the endoscope to obtain a carrier modulated by the video signal. And a conductive member used as an antenna for radiating the carrier wave and provided along a longitudinal direction of the insertion portion.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing a configuration of an endoscope apparatus according to a first embodiment of the present invention.

As shown in FIG. 1, an endoscope apparatus according to the present embodiment includes an endoscope 1 for projecting an image of a subject in a body cavity or a conduit so that the image can be visually observed. An image pickup device 2 that is provided detachably and attached and obtains an image signal by imaging a subject image obtained by the endoscope 1, and a video signal component is extracted from the image signal obtained by the image pickup device 2. A transmitting device 3 that transmits a radio wave by frequency-modulating a carrier with a video signal, a receiving device 4 that receives a radio wave from the transmitting device 3 to obtain a video signal that can be displayed on a monitor, and a video obtained by the receiving device 4 And a monitor device 5 for projecting a signal.

The endoscope 1 has an elongated and rigid insertion portion 11 to be inserted into a body cavity or a duct, and is provided at a base end side of the insertion portion 11 for holding the endoscope 1. Gripper 12
And an eyepiece 13 provided at, for example, a base end of the gripper 12 for projecting a subject image obtained by the endoscope 1 so that the subject can be visually observed. An image transmission constituted by, for example, a relay lens, through which the objective optical system 14 enters, through the insertion section 11 and the grip section 12, and guides the subject image obtained through the objective optical system 14 to the eyepiece section 13. An optical system 15, an eyepiece optical system 16 provided in the eyepiece section 13 for emitting a subject image guided by the image transmission optical system 15 so that the subject image can be visually observed, and an LED that emits illumination light toward the subject, for example, an LED (Light emitting diode).

The imaging device 2 is detachably attached to the eyepiece 13 of the endoscope 1 and captures a subject image emitted from the eyepiece 13 to obtain an image signal. A cable 25 extending from the camera head 21 and transmitting an image signal obtained by the camera head 21 to the transmitting device 3; and a connector provided at an end of the cable 25 and electrically connected to the transmitting device 3. 26
It is comprised including. The camera head 21 forms an imaging optical system 22 that forms an image of a subject emitted from the eyepiece optical system 16, and captures an image of the subject formed by the imaging optical system 22 to generate an imaging signal. CCD23 to get
(Charge Coupled Device) and an amplifier 24 for amplifying an image signal obtained by the CCD 23 and transmitting the amplified signal to the cable 25.

The transmitting device 3 extracts a video signal component from an image signal obtained by the image capturing device 2 and obtains a carrier modulated by the video signal. A radiating antenna 32 and a battery that supplies power to the transmission circuit 31 and the imaging device 2 and supplies power to the illumination device (not shown) of the endoscope 1 from the imaging device 2 via electrical contacts (not shown). 33 are provided. The transmission circuit 31 amplifies an imaging signal transmitted from the imaging device 2, and performs CDS (correlated double sampling) processing on the imaging signal obtained through the amplifier 34 to perform imaging. A CDS circuit 35 for removing a reset noise included in the signal to extract a video signal component, an FM modulation circuit 36 for frequency-modulating a carrier with a video signal obtained by the CDS circuit 35, and a carrier obtained by the FM modulation circuit And a transmission amplifier 37 that amplifies the signal. The transmitting device 3 may be fixed to an operator with a belt (not shown) or inserted into a pocket of the operator, for example.

The receiving device 4 includes an antenna 41 for receiving a radio wave from the transmitting device 3, an FM demodulation circuit 42 for demodulating a radio wave obtained by the antenna 41 and extracting a video signal component, and an FM demodulation circuit. A color separation circuit 43 for performing a color separation process on the video signal obtained at 42 to obtain a video signal composed of a luminance signal and a color difference signal;
A white balance circuit 44 for correcting the white balance of the video signal obtained in step (a), and performing AGC (automatic gain control) on the video signal obtained in the white balance circuit 44 so as to reduce the signal level of the obtained video signal to a predetermined level. AGC circuit 45 for maintaining the video signal at
A gamma correction circuit 46 for performing correction, and an emphasis circuit 4 for performing image enhancement processing on a video signal obtained by the gamma correction circuit 46.
7 and an encoder 48 for converting the video signal obtained by the emphasizing circuit 47 into a video signal of a format that can be displayed on a monitor.

Next, the operation of this embodiment will be described. A subject image is transmitted to a CCD 23 via an objective optical system 14, an image transmission optical system 15, an eyepiece optical system 16, and an imaging optical system 22.
And is subjected to photoelectric conversion. And this CCD23
The imaging signal obtained by the photoelectric conversion is supplied to the CDS circuit 35 via the amplifier 24, the cable 25, and the amplifier 34, and the CDS circuit 35 removes a reset noise component included in the imaging signal. To extract a video signal component. The video signal obtained by the CDS circuit 35 is frequency-modulated by an FM modulation circuit 36,
The carrier obtained by the modulation circuit 36 is power-amplified by the transmission amplifier 37 and radiated from the antenna 32 as a radio wave.
At this time, the video signal input to the FM modulation circuit 36 is
Since the reset noise component has been removed by the CDS circuit 35, the S / N is better than in a configuration in which the CDS circuit 35 is not provided in the transmission device 3.

The radio wave radiated from the transmitting device 3 is received by the antenna 41 of the receiving device 4, and the video signal is demodulated by the FM demodulation circuit 42. The video signal obtained by the FM demodulation circuit 42 is
The luminance signal and the color difference signal are converted into a separated video signal, white balance correction is performed by a white balance circuit 44, and AGC processing is performed by an AGC circuit 45.
The γ correction circuit 46 performs γ correction processing, the enhancement circuit 47 performs image enhancement processing, and the encoder 48 converts the image signal into a video signal in a format that can be displayed on a monitor.
The image is given to the monitor device 5 and the observation image of the endoscope 1 is displayed on the monitor 5.
Will be displayed. At this time, even if an obstacle is placed on the radio wave propagation path between the transmission device 3 and the reception device 4 or an obstacle crosses the radio wave propagation path, the reception device 4 sets the A
Since the GC processing is performed and the S / N is improved, it is possible to prevent the observation image displayed on the monitor device 5 from being darkened and the image quality from being deteriorated.

As described above, according to the present embodiment, the AGC processing is performed in the receiving device 4, so that even if there is an obstacle in the radio wave propagation path, the S / N is improved, and the image quality of the observed image is improved. The effect of improving is obtained. In addition, since CDS processing is performed in the transmitting device 3, S / N is improved. Further, since the receiving device 4 performs the color separation process, the white balance correction process, the AGC process, the γ correction process, and the image enhancement process, all or some of these video signal processes are performed by the transmission device 3. The circuit of the transmission device 3 provided to be connected to the endoscope 1 is reduced in size as compared with the configuration performed on the side. Therefore, according to the present embodiment, even if there is an obstacle in the radio wave propagation path, the S / N is improved, the image quality of the observed image is improved, and the circuit provided on the endoscope is downsized. The effect is obtained.

The transmitting device 3 may be formed integrally with the camera head 21. Since the transmission device 3 is integrally formed with the camera head 21, the cable 25 can be removed. Further, as in the present embodiment, when transmitting device 3 is configured separately from camera head 21, camera head 21 is reduced in size.

(Second Embodiment) FIG. 2 shows a second embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of an endoscope apparatus according to the embodiment. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 2, in the endoscope apparatus of the present embodiment, an endoscope 101 is provided in place of the endoscope 1 (see FIG. 1) of the first embodiment. . Other configurations are the same as in the first embodiment.

The endoscope 101 includes an elongated and flexible insertion portion 111 inserted into a body cavity or a duct, and the insertion portion 1.
A holding unit 112 provided on the base end side of the insertion unit 11 for holding the endoscope 101; an objective optical system 113 provided at the distal end of the insertion unit 111 to form a subject image; An imaging surface is arranged at an imaging position of the system 113, and a CCD 11 as an imaging unit that captures a subject image and obtains an imaging signal
4, provided near the CCD 114, and the CCD
An amplifier 115 for amplifying the imaging signal obtained at 114;
A signal line 116 inserted through the insertion portion 111 and transmitting an imaging signal from the amplifier 115 to the grip portion 112 side;
A transmission circuit 31 having the same configuration as that of the first embodiment (see FIG. 1), an antenna 117 for radiating a carrier wave obtained by the transmission circuit 31, a battery 33, and a lighting device (not shown) for illuminating a subject image It is provided with.

Next, the operation of the present embodiment will be described. In the present embodiment, the description of the actions common to the first embodiment will be omitted. The subject image is provided to the CCD 114 via the objective optical system 113 and is photoelectrically converted. The imaging signal obtained by photoelectric conversion by the CCD 114 is supplied to the amplifier 34 of the transmission circuit 31 via the amplifier 115 and the signal line 116. The subsequent action is
This is the same as in the first embodiment.

According to the embodiment described above, the first
The same effect as that of the embodiment can be obtained.

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of an endoscope apparatus according to the embodiment. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 3, in the endoscope apparatus according to the present embodiment, an endoscope 201 is provided instead of the endoscope 1 (see FIG. 1) according to the first embodiment. Instead of the imaging device 2 of the first embodiment (see FIG. 1), an imaging device 202
Is provided, and a transmitting device 203 is provided in place of the transmitting device 3 (see FIG. 1) of the first embodiment. Other configurations are the same as in the first embodiment. Further, the points different from the first embodiment will be described below.

The endoscope 201 is a rigid endoscope, and the outer tube of the insertion section 11 is constituted by a metal tube 213. The transmitting device 203 is the transmitting device 3 according to the first embodiment.
(See FIG. 1).
2 (see FIG. 1) is removed, and a feeder line 211 for transmitting the output from the transmission amplifier 37 to the imaging device 202 is provided instead. Then, the power supply line 211
Is connected to the power supply point 212 via an electrical contact (not shown) between the transmitting device 203 and the imaging device 202, and an electrical contact (not shown) between the imaging device 202 and the imaging device 202 and the endoscope 201. It is electrically connected to the metal cylinder 213. Thus, the output from the transmission amplifier 37 is electrically connected to the metal tube 213, and the metal tube 213
It is used as an antenna for radiating the carrier output from the transmission amplifier 37.

Next, the operation of the present embodiment will be described. In the present embodiment, the description of the actions common to the first embodiment will be omitted. As in the first embodiment,
When the imaging signal is provided to the transmission circuit 31, the transmission circuit 31
Outputs a carrier in the same manner as in the first embodiment. This carrier is supplied to a metal tube 213 via a power supply line 211 and a power supply point 212.
Radiates radio waves as a transmitting antenna. This metal tube 213
The radio wave radiated from is supplied to the receiving device 4 and an observation image is displayed on the monitor device 5 in the same manner as in the first embodiment.

According to the embodiment described above, the first
The same effect as that of the embodiment can be obtained. Further, according to the present embodiment, since the metal tube of the insertion portion 11 is used as an antenna, the antenna 3 can be used as compared with the first embodiment.
2 (see FIG. 1). Therefore, the antenna projecting from the transmission circuit on the endoscope side is removed, and the effect that the operability can be improved and the size can be reduced is obtained.

The metal tube 213 is not limited to a mantle tube.
Another metal member provided along the longitudinal direction of the insertion portion 11 may be used. For example, an inner tube provided inside the insertion portion 11 may be used.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of an endoscope apparatus according to the embodiment. In the present embodiment, the same reference numerals are given to the same components as those in the second embodiment, and the description will be omitted.

As shown in FIG. 4, in the endoscope apparatus according to the present embodiment, an endoscope 301 is provided instead of the endoscope 101 (see FIG. 2) according to the second embodiment. . Other configurations are the same as those of the second embodiment. Hereinafter, points different from the second embodiment will be described.

The endoscope 301 has substantially the same configuration as the endoscope 101 (see FIG. 2) of the second embodiment, except that the antenna 117 (see FIG. 2) is removed. A feed line 311 for guiding the output from the transmission amplifier 37 to the insertion section 111, and a feed line passing through the inside of the insertion section 111, and a feed point 312 near the base end of the insertion section 111.
The antenna line 3 electrically connected to the feed line 311
13 are provided.

Next, the operation of the present embodiment will be described. Note that, in the present embodiment, a description of an operation common to the second embodiment will be omitted. As in the second embodiment,
When the imaging signal is provided to the transmission circuit 31, the transmission circuit 31
Outputs a carrier in the same manner as in the second embodiment. The carrier is supplied to an antenna line 313 via a feed line 311 and a feed point 312, and the antenna line 313
13 radiates radio waves. The radio wave radiated from the antenna line 313 is supplied to the receiving device 4 and an observation image is displayed on the monitor device 5 in the same manner as in the second embodiment.

According to the above-described embodiment, the same effects as those of the second embodiment can be obtained. Further, according to the present embodiment, antenna line 31 inserted through insertion portion 111 is inserted.
3 is provided, so as compared with the second embodiment,
The antenna 117 (see FIG. 2) is removed. Therefore, the effect that the antenna protruding from the endoscope is removed and the operability can be improved and the size can be reduced can be obtained.

Note that the antenna line 313 is
The metal wire is not limited to a conducting wire passing through the inside, and may be another metal member provided along the longitudinal direction of the insertion portion 111, for example, a mesh tube forming the insertion portion 111.

(Fifth Embodiment) FIG. 5 shows a fifth embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of an endoscope apparatus according to the embodiment. Note that, in the present embodiment, the same reference numerals are given to portions configured similarly to the second embodiment, and description thereof will be omitted.

As shown in FIG. 5, in the endoscope apparatus of the present embodiment, an endoscope 401 is provided in place of the endoscope 101 (see FIG. 2) of the second embodiment. . Other configurations are the same as those of the second embodiment. Hereinafter, points different from the second embodiment will be described.

The endoscope 401 replaces the insertion section 111 of the endoscope 101 (see FIG. 2) of the second embodiment.
An insertion portion 411 is provided, and the grip portion 1 according to the first embodiment is provided.
12 (see FIG. 2), a grip 412 is provided. The insertion portion 411 is elongated and flexible.
1, a bending portion 422 that bends freely by operation from the hand side, and a distal end portion 423 are sequentially connected from the base end side, and the bending portion 422 includes a plurality of bending pieces 431. Are rotatably connected to each other by, for example, rivets. The grip portion 412 is provided with a bending operation lever 432 for performing a bending operation on the bending portion 422, and the bending operation lever 4 is provided in the flexible tube portion 421.
A conductive bending operation wire 433 for transmitting the pulling operation force from the T.32 to the bending piece 431 is provided. Thus, by operating the bending operation lever 432, the bending portion 422 can be freely bent.

In the endoscope 401, the antenna 117 of the endoscope 101 (see FIG. 2) of the second embodiment is used.
2 (see FIG. 2), and instead, a feeder line 441 that guides the output from the transmission amplifier 37 to the insertion section 411.
The power supply line 441 is connected to the bending operation wire 43 at a connection point 442 near the starting end of the insertion portion 411.
3 is electrically connected. Thus, the bending operation wire 433 is configured to function as a transmission antenna that radiates an output from the transmission circuit 31 as a radio wave.

Next, the operation of the present embodiment will be described. Note that, in the present embodiment, a description of an operation common to the second embodiment will be omitted. As in the second embodiment,
When the imaging signal is provided to the transmission circuit 31, the transmission circuit 31
Outputs a carrier in the same manner as in the second embodiment. The carrier is supplied to the bending operation wire 433 via the power supply line 441 and the connection point 442, and the bending operation wire 433 radiates a radio wave as a transmission antenna.
The radio wave radiated from the bending operation wire 433 is
In the same manner as in the first embodiment, the image is provided to the receiving device 4 and an observation image is displayed on the monitor device 5.

According to the present embodiment described above, the same effects as in the second embodiment can be obtained. Further, according to the present embodiment, since the bending operation wire 433 that passes through the inside of the insertion portion 411 is used as an antenna, the antenna 117 (see FIG. 2) is removed as compared with the second embodiment. It is configured. Therefore, the effect that the antenna protruding from the endoscope is removed and the operability can be improved and the size can be reduced can be obtained.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the invention. For example, the endoscope may be a rigid endoscope as in the first embodiment, or may be a flexible endoscope as in the second embodiment. Further, for example, the endoscope may be one in which an imaging device is attached to an optical endoscope as in the first embodiment, or the imaging means may be an imaging device as in the second embodiment. It may be a built-in electronic endoscope.

[Supplementary Note] (Supplementary note 1-1) In an endoscope apparatus for transmitting image information obtained by an endoscope to a receiving device by radio waves, the endoscope is built in or attached to the endoscope. Imaging means for capturing an observation image to obtain an image signal, and a first signal which is built in or attached to the endoscope and which performs at least correlated double sampling on the image signal to obtain a first video signal Processing means, transmitting means built in or attached to the endoscope for performing frequency modulation on the first video signal and transmitting radio waves, and provided in the receiving device for receiving the radio waves and receiving the first radio signals. Demodulation means for demodulating a video signal; and second signal processing means for performing at least automatic gain control on the first video signal demodulated by the demodulation means to obtain a second video signal. Characterized by Endoscope device.

(Additional Item 1-2) The endoscope apparatus according to additional item 1-1, wherein the endoscope observes the inside of a body cavity.

(Additional Item 1-3) The endoscope apparatus according to Additional Item 1-1, wherein the endoscope has a battery.

(Additional Item 1-4) The endoscope apparatus according to additional item 1-1, wherein the endoscope device is provided to be attached to the endoscope, and the first signal processing means and the transmission means are provided. Having a transmitting device.

(Additional Item 1-5) The endoscope apparatus according to Additional Item 1-4, wherein the transmitting device has a battery.

(Additional Item 2-1) In the endoscope apparatus for transmitting observation image information obtained by inserting an insertion portion of the endoscope into a body cavity or a duct to a receiving device by radio waves, Imaging means built in or attached to the endoscope to capture an observation image of the endoscope to obtain a video signal; modulation means built in or attached to the endoscope to obtain a carrier modulated by the video signal; and the carrier And a conductive member provided along the longitudinal direction of the insertion portion, the endoscope device being used as an antenna for radiating light.

(Additional Item 2-2) The endoscope apparatus according to additional item 2-1 wherein the endoscope observes a body cavity.

(Additional Item 2-3) The endoscope apparatus according to additional item 2-1 wherein the endoscope has a battery.

(Additional Item 2-4) In the endoscope apparatus according to Additional Item 2-1, the conductive member is a metal outer tube or inner tube forming the insertion portion.

(Additional Item 2-5) In the endoscope apparatus according to Additional Item 2-1, the conductive member is a conducting wire inserted through the insertion portion.

(Additional Item 2-6) In the endoscope apparatus according to Additional Item 2-1, the conductive member is a bending operation wire inserted through the insertion portion.

(Additional Item 2-7) In the endoscope apparatus according to Additional Item 2-1, the conductive member is a metal mesh tube constituting the insertion portion.

[0053]

As described above, according to the first aspect of the present invention,
According to the endoscope apparatus, even if there is an obstacle in the propagation path of the radio wave, the signal-to-noise ratio is improved, the image quality of the observed image is improved, and the circuit provided in the endoscope is downsized. The effect is obtained. Further, according to the endoscope apparatus of the second aspect of the present invention, an effect is obtained that the antenna projecting from the endoscope is removed, and the operability of the endoscope can be improved and the size of the endoscope can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an endoscope apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an endoscope apparatus according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of an endoscope apparatus according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of an endoscope apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of an endoscope apparatus according to a fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Imaging device 3 ... Transmission device 4 ... Receiving device 31 ... Transmission circuit 35 ... CDS circuit 36 ... FM modulation circuit 42 ... FM demodulation circuit 45 ... AGC circuit 101 ... Endoscope 114 ... CCD 201 ... Inside Endoscope 202 ... Imaging device 213 ... Metal tube 301 ... Endoscope 313 ... Antenna wire 401 ... Endoscope 433 ... Bending operation wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Masahisa Murata, Inventor 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Kazutaka Nakachi 2-43-2, Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Industrial Co., Ltd. F-term (reference) 2H040 BA00 GA01 GA02 4C061 AA00 BB02 CC06 CC07 DD03 FF02 FF41 FF45 HH35 JJ01 JJ15 JJ19 LL02 LL03 NN03 NN05 SS08 SS13 UU06 UU09 5C054 AA01 EA05 CA04 CC05

Claims (2)

[Claims] 1. An endoscope apparatus for transmitting image information obtained by an endoscope to a receiving apparatus by radio waves, wherein the imaging apparatus is built in or attached to the endoscope to pick up an observation image of the endoscope and obtain an imaging signal. Imaging means for obtaining an image signal; first signal processing means built in or attached to the endoscope and performing at least correlated double sampling processing on the imaging signal to obtain a first video signal; and the endoscope Transmitting means built in or attached to the first video signal to perform frequency modulation on the first video signal and transmit a radio wave; demodulation means provided in the receiving device for receiving the radio wave and demodulating the first video signal; An endoscope apparatus comprising: a second signal processing unit that performs at least automatic gain control on the first video signal demodulated by the demodulation unit to obtain a second video signal. . 2. An endoscope apparatus for transmitting observation image information obtained by inserting an insertion portion of an endoscope into a body cavity or a duct to a receiving device by radio waves, wherein the endoscope device is built in or attached to the endoscope. Imaging means for capturing an observation image of the endoscope to obtain a video signal; a modulating means built in or attached to the endoscope to obtain a carrier modulated by the video signal; and an antenna for radiating the carrier An endoscope apparatus, comprising: a conductive member used along a longitudinal direction of the insertion portion.