JP2003210390A - Endoscope device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an endoscope apparatus which has been made in view of the above circumstances, can reliably photograph an observation site, has good operability, and reduces the burden on a viewer. . An endoscope apparatus (1) has a photographing section (21) as an observation optical system that simultaneously captures a wide-field image at a distal end (11) of a small-diameter insertion section (2). The imaging unit 21 has a primary reflecting mirror 22 and a secondary reflecting mirror 24. The primary reflecting mirror 22 has a primary reflecting surface 23 that is rotationally symmetric with respect to the front-rear direction of the insertion section 2, and reflects projection light L2 from the subject as primary reflected light L3. The secondary reflecting mirror 24 has a rotationally symmetrical secondary reflecting surface 25, and converges on the CCD, which is an image sensor of the same central axis imaging mechanism 31 as the primary reflecting surface 23, facing the primary reflecting surface 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope apparatus having an observation optical system for simultaneously capturing a wide-field image at the tip of a small-diameter insertion portion.

[0002]

In recent years, by inserting a small-diameter insertion portion having an observation optical system at the distal end into a body cavity, the body cavity in the body cavity can be observed and, if necessary, can be inserted into the channel. An optical fiber endoscope apparatus using an optical fiber or the like capable of various medical treatments using an inserted treatment tool and an electronic endoscope apparatus using a solid-state imaging device such as a charge coupled device (CCD) are widely used. ing.

Such an endoscope apparatus, for example, inserts a small-diameter insertion portion having an objective optical system at its tip into the body cavity of the stomach, intestine or the like for fine observation of the body cavity. This insertion section is composed of an observation optical system, a bendable bending section, and a flexible flexible tube section from the tip side, and the observation optical system is provided with an optical device at the tip of a tubular member, and an image is seen from the front side. Therefore, the observation optical system is observed toward a desired portion by adjusting the bending degree of the bending portion by a remote control during observation.

In such a conventional endoscope apparatus,
After inserting the insertion part to the point assumed in advance, you have to shoot the bending part while adjusting the bending condition,
Skillful operation of the endoscope apparatus is required to accurately capture a desired portion. Moreover, since the bending condition of the bending portion must be adjusted many times in the body cavity, the burden on the subject was large.

By the way, in the observation of the inside of the body cavity by the endoscopic device, a stereoscopic image is desired in order to more accurately grasp the condition of the affected part. Since the image is taken in from the front side of the optical device provided at the tip of the diameter insertion portion, it is difficult to secure parallax, and there is a problem that a clear stereoscopic image cannot be obtained.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an endoscope apparatus that can reliably photograph an observation site, has good operability, and reduces the burden on the viewer. To aim. Another object of the present invention is to provide an endoscope device capable of capturing a stereoscopic image.

[0007]

An endoscope apparatus according to claim 1 of the present invention is an endoscope apparatus having an observation optical system for simultaneously capturing a wide-field image at the tip of a small-diameter insertion portion. The observation optical system has a rotationally symmetric reflection surface and a primary reflection mirror that has a reflection surface that is rotationally symmetric with respect to the front-rear direction of the insertion portion and that reflects the projection light from the subject as primary reflection light. A secondary light condensing the primary reflected light, which is arranged on the same central axis as the primary reflective surface and is opposed to the primary reflective surface, as a secondary reflected light through a lens system and / or an optical fiber to an image sensor. And a reflecting mirror. By adopting such a configuration, when the insertion part is inserted into a body cavity, a wide-field image is incident on the rotationally symmetric primary reflection surface in the circumferential direction, and this image is secondary reflected as primary reflected light. After entering the reflecting surface of the mirror, it is focused on the image sensor through a lens and the like. As a result, the inside of the body cavity can be imaged in the circumferential direction, and the inner wall surface within the range can be continuously imaged by moving the insertion part within a predetermined range, so that the desired site can be reliably obtained. You can shoot. Moreover,
There is no need to adjust the curvature of the insertion part.

The endoscope apparatus according to a second aspect of the present invention is the endoscope apparatus according to the first aspect, wherein the primary reflecting mirror has a substantially frustoconical inclined surface as a primary reflecting surface, and the secondary reflecting mirror has the above-mentioned configuration. It has a planar secondary reflection surface facing the primary reflection surface coaxially provided on the upper side of the primary reflection surface, the central portion of the primary reflection mirror is an opening, An image pickup device is arranged below via a lens system and / or an optical fiber. Therefore, it is possible to reliably capture the image in the circumferential direction with a relatively simple structure. Further, the observation optical system can be downsized.

According to a third aspect of the present invention, in the second aspect, the secondary reflecting mirror has an opening portion other than the reflecting portion of the primary reflected light. For this reason, not only the imaging of the insertion portion in the circumferential direction but also the imaging of the front side of the insertion portion can be performed at the same time.

An endoscope apparatus according to a fourth aspect is the endoscope apparatus according to any one of the first to third aspects, in which a plurality of the observation optical systems are coaxially arranged in series. Therefore, it is possible to obtain two or more images in the circumferential direction having different viewpoints that are simultaneously captured, and it is possible to maintain a parallax sufficient to obtain a stereoscopic image by appropriately setting the distances of these observation optical systems. , You can get a clear stereoscopic image.

Further, in the endoscope apparatus according to a fifth aspect of the present invention, the wide-field image captured by the observation optical system according to any one of the first to fourth aspects is converted into a strip image. It has a conversion device. Therefore, the image of the inner wall surface of the body cavity can be obtained as strip-shaped data, which can be visually recognized as if the inner wall surface was cut open, and thus it is possible to capture an image that is more easily used for diagnosis and the like.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below in detail with reference to FIGS.

As shown in FIG. 1, an endoscope apparatus 1 according to this embodiment.
Has an elongated and flexible insertion portion 2 and an operation portion 3 which also functions as a grip portion which is continuously provided on the proximal end side of the insertion portion 2.
A video processor (not shown) including a video converting device and a video synthesizing device is connected to the upper portion of the operation unit 3.
An optical fiber or the like is built in the side portion of the operation portion 3. The proximal end side of this optical fiber is connected to a light source device (not shown), and the distal end side is at the distal end portion 11 of the insertion portion 2 described later. It continues until. In addition, 4 and 5 are various operation switches, 6 is a bending operation lever, and 7 is an insertion hole for a treatment instrument or the like.

The insertion portion 2 is a bendable bending portion formed by connecting a tip portion 11 provided with an observation optical system from the tip side and a bending piece adjacent to the rear end of the tip portion 11. 12
And a flexible flexible tube portion 13 adjacent to the rear end of the curved portion 12 and having flexibility. In the endoscope device 1 as described above, the imaging unit 21 which is the observation optical system of the distal end portion 11 is used.
As shown in FIG. 2, the primary reflecting mirror 22 has a substantially circular truncated cone shape that is rotationally symmetrical with respect to the front-rear direction (front-rear direction) of the insertion portion 2 (tip portion 11), and has a primary reflecting surface 23 on its side surface, and Reflector
A disk-shaped two-dimensional disc that is rotationally symmetric with respect to the front-rear direction and that has a secondary reflection surface 25 that faces the primary reflection surface 23 that is provided coaxially with the observation transparent cover 26 at a predetermined distance from each other. The secondary reflection mirror 24 is provided, and an inverted truncated cone-shaped illumination reflection mirror 27 is provided below the primary reflection mirror 22.
Illuminators 29 are annularly arranged on a mounting table 28 installed below 27. The center of the primary reflecting mirror 22 and the illuminating reflecting mirror 27 is a hollow cylindrical portion A, and the lens mechanism 30 and the imaging mechanism 31 are provided on the lower end side (the rear side of the insertion portion 2).
And are arranged.

In the photographing section 21 as described above, the secondary reflecting surface 25 is annular, and the primary reflecting surface 23 is slightly curved so that the reflected light is accurately projected onto the secondary reflecting surface 25. Is formed. Regarding the relationship between the primary reflecting surface 23 and the secondary reflecting surface 25, see, for example, JP-A-10-54939.
The theory detailed in Japanese Patent Publication No. 6-812905 can be applied. Further, the illuminator 29 is connected to the above-described optical fiber and is configured to emit light from a light source device (not shown). Then, in the image pickup mechanism 31, a CC (not shown) which is an image pickup element
D, a flexible printed circuit board, an image pickup cable, etc. are built in, and this image pickup cable is connected to the above-mentioned video processor via the bending portion 12 and the flexible tube portion 13. Such an imaging unit 21 is 10 mm or less, preferably 5 mm.
It has a diameter of less than mm. In the present embodiment, the image pickup mechanism 31 having a CCD is installed below the primary reflecting mirror 22 to configure the tip portion 11. However, the image pickup mechanism 31 is installed outside the body cavity and the operation unit 3 is provided. You may connect to. In this case, an optical fiber cable (image guide) may be provided below the primary reflecting mirror 22 and the captured image may be transmitted to an external image pickup device equipped with a CCD.

The operation of the above configuration will be described. First, after inserting the insertion portion 2 into a body cavity such as an intestine, the operation switches 4 and 5 are operated to supply light from an optical fiber to cause the illuminator 29 to emit light. Then, the operating lever 6 is operated to adjust the bending degree of the bending portion 12 so that the front-back direction of the imaging unit 21 is substantially parallel to the intestinal wall. As a result, the state of the intestinal wall is reflected as the imaged object B by the light L1 projected from the illuminator 29, the incident light L2 is incident on the primary reflecting mirror 22, and is reflected as the primary reflected light L3. Then, the primary reflected light L3 is incident on the annular secondary reflecting surface 25 of the secondary reflecting mirror 24, passes through the cavity A as the secondary reflected light L4, and is condensed on the CCD of the lens mechanism 30. Such an imaging operation may be performed by moving the insertion section 2 forward and backward in a body cavity such as the intestine and continuously imaging a desired range.

Then, this image pickup data is transmitted to the video processor through the image pickup cable, and image conversion and image synthesis are performed. That is, in this image pickup unit 21, the state of 360 degrees in the circumferential direction is projected on the primary reflection surface 23 and reflected by the annular secondary reflection surface 25 for photographing, so that the obtained original image is as shown in FIG. It becomes donut-shaped as shown in a). Then, this donut-shaped original image 41 is converted into a horizontally long image by an image conversion device to form a converted image 42 as shown in FIG. In addition, in FIG. 3, for convenience of description, the subjects are A, B, and
Expressed in European characters such as C. Here, in the video conversion device, one pixel of the donut-shaped original image 41 and one pixel of the converted image 42
Does not correspond on a one-to-one basis. Therefore, for the pixels that do not correspond, it is necessary to interpolate the luminance from the luminance data of the surrounding pixels by the co-linear interpolation method or the like. At this time, it is preferable to appropriately select and use an interpolation luminance determination method in consideration of human appearance.

As described above, the converted image 42 represented by the image conversion device as a strip-shaped planar image is an image of a specific part within the body cavity within a predetermined range. Captured in the memory of the processor and based on the pre-measured positional relationship between the captured images, the continuously captured data are combined by the image composition device so that there is no seam, and they are connected at predetermined intervals and displayed as continuous images. By doing so, it is possible to obtain an image in which a predetermined range of the body cavity is cut open.

Further, according to the endoscope apparatus 1 of the present embodiment, since a strip-shaped image obtained by simultaneously photographing the periphery of 360 degrees can be obtained, there is no fear of overlooking a lesion and the image data of these CCDs. Since it can be stored as a digital signal via a video processor, it is possible to select a desired portion and perform an operation such as zooming, so that it is possible to significantly improve the diagnostic accuracy of a lesion or the like. .

As described above in detail, the endoscope apparatus 1 of the present embodiment has the photographing section 21 which is the observation optical system for simultaneously photographing a wide-field image at the distal end portion 11 of the small-diameter insertion section 2. The photographing unit 21 has a primary reflection surface 23 that is rotationally symmetric with respect to the front-back direction of the insertion unit 2, and has a primary reflection mirror 22 that reflects the projection light L2 from the subject as primary reflection light L3, and a rotationally symmetric two-dimensional mirror. It has a secondary reflection surface 25, is arranged on the same central axis as the primary reflection surface 23 so as to face the primary reflection surface 23, and collects the primary reflected light L3 as secondary reflected light L4 on a CCD which is an image pickup element of the image pickup mechanism 31. Since it has the secondary reflecting mirror 24, the insertion portion 2
Is inserted into a body cavity such as the intestine, a wide-field image is incident on the rotationally symmetric reflection surface of the primary reflection surface 23 in the circumferential direction, and this image is reflected by the secondary reflecting mirror 24 as primary reflected light L3. After entering the secondary reflection surface 25, the secondary reflection light L4 is focused on the CCD through a lens or the like. As a result, the inside of the body cavity can be imaged in the circumferential direction in the range of 360 degrees, and the inner peripheral surface within the range can be continuously imaged by simply moving the insertion section 2 to a predetermined range. It is possible to reliably photograph a desired part with one operation. Moreover, it is not necessary to repeatedly adjust the curvature of the insertion portion 2 by searching for a portion to be photographed. These are excellent operability,
The endoscope device 1 has significantly reduced pain and burden on the subject.

In particular, the primary reflecting mirror 22 has a substantially frustoconical inclined surface as the primary reflecting surface 23, and the secondary reflecting mirror 24 is provided above the primary reflecting surface 23 coaxially with the primary reflecting surface 23. The primary reflecting surface 23 has an opening A at the center thereof, and an image pickup mechanism 31 having a CCD is arranged below the primary reflecting surface 23. By adopting the structure, the image in the circumferential direction can be reliably captured with a relatively simple structure, and the size of the image capturing unit 21 can be reduced.

Further, in the present embodiment, since the image conversion device for converting the wide-field image photographed by the photographing unit 21 into the strip-shaped image is provided, the image of the inner wall surface of the body cavity is converted into the strip-shaped data. Since the image can be obtained, it can be visually recognized as if the inner wall surface was cut open, so that it is possible to capture an image that is easier to use for diagnosis and the like.

Next, a second embodiment of the present invention will be described in detail with reference to FIGS. In the endoscope apparatus of the second embodiment, the secondary reflecting mirror 24 has an annular second reflecting surface 25 that serves as a reflecting portion for the primary reflected light L3, and the other portion, that is, the central portion, has the opening portion 25A. Since it has the same configuration as that of the above-described first embodiment except that is formed, the same reference numerals are given to the same configurations, and detailed description thereof will be omitted.

By forming the opening 25A at the center of the secondary reflecting mirror 24 as in the present embodiment, the reflected light L5 on the front surface of the tip 11 passes through the lens mechanism 30 from the opening 25A and is imaged. Since it is focused on the CCD of the mechanism 31, the obtained original image has a circular front image 52 in the center of the donut-shaped surrounding image 51 as shown in FIG. Therefore, from this donut-shaped surrounding image 51, a strip-shaped converted image can be obtained as in the above-described first embodiment, and the front image 52 of the tip portion 11 can be used to simultaneously confirm the front condition. Therefore, it is possible to provide a more reliable image in diagnosis or the like.

A third embodiment of the present invention will be described with reference to FIG. The endoscope apparatus according to the third embodiment includes the image capturing units 21, 21.
Except for having a structure in which a plurality of A's, two in this embodiment are coaxially arranged, the same configuration as the first embodiment described above is given, and therefore the same reference numerals are given to the same configurations Description is omitted. By thus arranging the two photographing units 21 and 21A in series, it is possible to simultaneously obtain two images having different viewpoints. Since such images correspond to parallax images, stereoscopic image data can be obtained by combining these images. Moreover, 2
Since the interval between the individual image capturing units 21 and 21A corresponds to the parallax, it is possible to secure a sufficient parallax by adjusting this interval, and it is possible to obtain a desired stereoscopic image. This makes it possible to visually diagnose the depth of lesions such as ulcers. Moreover, since the imaging units 21 and 21A are arranged coaxially, the diameter of the tip portion 11 can be the same as that in the first embodiment described above, and the burden on the subject remains unchanged.

Further, FIG. 7 shows the fourth embodiment of the present invention.
And FIG. 8 will be described. The endoscope apparatus of the fourth embodiment is basically the same as that of the above-described third embodiment in which two image pickup units 21 and 21A are vertically arranged in series, and in FIG. The imaging unit 21 includes a first primary reflection mirror 22A,
A disk-shaped first secondary reflecting mirror 24A rotationally symmetrical with respect to the front-rear direction, which has a secondary reflecting surface 25 facing the primary reflecting surface 23 provided coaxially with the first primary reflecting mirror 22A. Have
The center of the first primary reflecting mirror 22A is a cavity A,
A first optical fiber cable 61 as an image guide is connected to the lower end side of the lens mechanism 30A. The lower second imaging unit 21A includes a second primary reflecting mirror 22B and a secondary reflecting surface 25 facing the primary reflecting surface 23 provided coaxially with the second primary reflecting mirror 22B. A disk-shaped second secondary reflecting mirror 24B that is rotationally symmetrical with respect to the front-rear direction.
And the center of the second primary reflecting mirror 22B is a hollow portion A, and the second optical fiber cable 62 as an image guide is connected to the lower end side thereof via the lens mechanism 30B. Then, the first optical fiber cable 61 and the second optical fiber cable 62 are configured to respectively transmit images to first and second image pickup mechanisms (not shown) having CCDs connected to the operation unit 3. The image pickup mechanism is further connected to a video processor equipped with a video conversion device. On the other hand, 63 is a third optical fiber cable, and this optical fiber cable 63 is connected to a light source provided outside and has an illuminator 64.
Emits light for illumination. In FIG. 7, reference numeral 65 is a transparent cover, and 66 is the first to third optical fiber cables.
A flexible cable that stores 61 to 63 in a bundle.

By adopting such a configuration, FIG.
The operation shown in can be performed. That is, the first
In the imaging unit 21 of the first primary reflection mirror 22A and the first primary reflection mirror 22A,
The image taken through the secondary reflecting mirror 24A is sent from the first optical fiber cable 61 to the first image pickup mechanism having a CCD, and divided into individual images, and then the original image in a donut shape. Is converted into a strip-shaped first converted image by the first image conversion device, displayed on the image display, and stored as a digital signal in the image composition device. On the other hand, in the second image pickup unit 21A, the image photographed through the second primary reflecting mirror 22B and the second secondary reflecting mirror 24B is the second optical fiber cable 63 and the second image provided with the CCD. After being sent to the imaging mechanism and divided into individual images, the donut-shaped original image is converted into a strip-shaped second image by the second image conversion device.
The converted image is converted and stored in the image synthesizing device. Then, in the image synthesizing device, the first converted image and the second
By synthesizing with the converted video of, a three-dimensional image is synthesized,
This is displayed on a three-dimensional image display. Further, the light from the light source is emitted from the illuminator 64 via the third optical fiber cable 63.

In this way, the first image pickup unit 21 and the second image pickup unit
By providing a parallax with 21A, a three-dimensional image can be combined. Further, the image pickup mechanism including the CCD does not need to be installed below the primary reflecting mirror 22, and may be installed outside the body cavity and connected to the operation unit 3. In this case, an optical fiber cable (image guide) is used. ) Is provided and the captured image may be transmitted to an external CCD.

Although the present invention has been variously described based on the above-described embodiments, the present invention is not limited to the above-described embodiments and various modifications can be made without departing from the spirit of the present invention. For example, as for the reflecting mirror, it suffices to have two reflecting mirrors, that is, a primary reflecting mirror and a secondary reflecting mirror, and the light is condensed on the imaging mechanism 31 via a tertiary reflecting mirror and a quaternary reflecting mirror. Good. Further, the illuminator 29 may project not only visible light but infrared rays as long as it can be measured by CCD. Further, the image pickup device is not limited to the CCD, but can be applied to an optical fiber endoscope apparatus.

[0030]

The endoscope apparatus according to the first aspect of the present invention comprises:
An endoscope apparatus having an observation optical system for simultaneously capturing a wide-field image at the tip of a small-diameter insertion section, wherein the observation optical system is a reflection surface rotationally symmetric with respect to the front-back direction of the insertion section. And a primary reflecting mirror that reflects the projection light from the subject as primary reflected light, and has a rotationally symmetrical reflecting surface that faces the primary reflecting surface and is arranged on the same central axis as the primary reflecting surface. Since it has a secondary reflecting mirror that condenses the primary reflected light as a secondary reflected light on the image pickup device through the lens system and / or the optical fiber, when the insertion portion is inserted into the body cavity or the like, it is rotationally symmetric. An image with a wide field of view is incident on the primary reflection surface in the circumferential direction, and this image is incident as primary reflection light on the reflection surface of the secondary reflection mirror, and then is condensed on the image sensor through a lens or the like. Thereby, the inside of the body cavity can be photographed in the circumferential direction, and by moving the insertion portion within a predetermined range, it is possible to continuously photograph the inner wall surface within the range,
It is possible to reliably capture a desired part. Moreover, it is not necessary to adjust the bending of the insertion portion. These make the endoscope device excellent in operability and less in pain for the subject.

The endoscope apparatus according to a second aspect is the endoscope apparatus according to the first aspect, wherein the primary reflecting mirror is a substantially frustoconical inclined surface as the primary reflecting surface, and the secondary reflecting mirror is the above-mentioned. It has a planar secondary reflection surface facing the primary reflection surface coaxially provided on the upper side of the primary reflection surface, the central portion of the primary reflection mirror is an opening, Since the image pickup device is arranged below via the lens system and / or the optical fiber, the image in the circumferential direction can be surely taken with a relatively simple structure. Further, the observation optical system can be downsized.

In the endoscope apparatus according to a third aspect of the present invention, in the second aspect, since the secondary reflecting mirror has an opening other than the reflecting portion of the primary reflected light, it is surrounded by the insertion portion. It is possible to take not only the image of the direction but also the image of the front side of the insertion portion at the same time.

The endoscope apparatus according to a fourth aspect of the present invention is the endoscope apparatus according to any one of the first to third aspects, wherein a plurality of the observation optical systems are coaxially arranged in series, so that the viewpoints of images taken at the same time can be obtained. You can get two or more different circumferential images,
Since the parallax sufficient to obtain a stereoscopic image can be held by appropriately setting the distance of these observation optical systems,
It is possible to obtain a clear stereoscopic image.

Further, in the endoscope apparatus according to a fifth aspect, in the image processing apparatus according to any one of the first to fourth aspects, the wide-field image captured by the observation optical system is converted into a strip image. Since it has a conversion device, the image of the inner wall surface of the body cavity can be obtained as strip-shaped data, so it can be visually recognized as if the inner wall surface was cut open, so it is possible to shoot an image that is easier to use for diagnosis etc. Becomes

[Brief description of drawings]

FIG. 1 is an overall view showing an endoscope apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged view showing a tip portion 11 of the endoscope device.

FIG. 3 shows an image taken by the endoscope apparatus, (a) shows an original image, and (b) shows a converted image.

FIG. 4 is a front end portion of an endoscope apparatus according to a second embodiment of the present invention.
FIG. 12 is an enlarged view showing 11.

FIG. 5 is a plan view showing an original image taken by the endoscope apparatus.

FIG. 6 is a front end portion of an endoscope apparatus according to a third embodiment of the present invention.
FIG. 12 is a schematic view showing 11.

FIG. 7 is a distal end portion of an endoscope device according to a fourth embodiment of the present invention.
FIG. 12 is an enlarged view showing 11.

FIG. 8 is a flowchart showing an operation of the endoscope device.

[Explanation of symbols]

1 Endoscopic device 2 Insert 11 Tip 21 Shooting department 22 Primary reflector 23 Primary reflective surface 24 Secondary reflector 25 Secondary reflective surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junichi Takiguchi             17 Kikui-cho, Shinjuku-ku, Tokyo Waseda University Science and Engineering             General Research Center F-term (reference) 2H040 BA02 BA14 CA12 CA25 GA02                       GA10 GA12                 4C061 BB07 CC06 FF40 NN01 PP20                       WW20                 5C022 AA09 AC42 AC51 AC78

Claims (5)

[Claims] 1. An endoscope apparatus having an observation optical system for simultaneously capturing a wide-field image at the tip of a small-diameter insertion portion,
The observation optical system has a reflection surface that is rotationally symmetric with respect to the front-rear direction of the insertion portion, and a primary reflection mirror that reflects projection light from a subject as primary reflection light; and a primary surface that has a rotationally symmetric reflection surface. A secondary reflecting mirror that is opposed to the reflecting surface and is arranged on the same central axis as the primary reflecting surface, and collects the primary reflected light as secondary reflected light on an image sensor through a lens system and / or an optical fiber. An endoscopic device having: 2. The primary reflecting mirror has a substantially frustoconical inclined surface as a primary reflecting surface, and the secondary reflecting mirror has the primary reflecting surface coaxially provided above the primary reflecting surface. The primary reflecting mirror has an opposing flat secondary reflecting surface, and the central portion of the primary reflecting mirror is an opening. An image pickup device is arranged below the primary reflecting mirror via a lens system and / or an optical fiber. The endoscopic device according to claim 1, wherein: 3. The endoscope apparatus according to claim 2, wherein the secondary reflecting mirror has an opening portion other than the reflecting portion of the primary reflected light. 4. The endoscope apparatus according to claim 1, wherein a plurality of the observation optical systems are coaxially arranged in series. 5. The endoscope according to claim 1, further comprising an image conversion device that converts a wide-field image captured by the observation optical system into a strip image. apparatus.