JPS63274906A - Endoscope device - Google Patents

Abstract

PURPOSE:To obtain illumination light matching with a scope equipped with a surface sequential type and a simultaneous type image pickup means by one light source device which emits white light by providing a rotary filter to the incidence end surface of a light guide which can be connected to the light source device. CONSTITUTION:In the surface sequential type electron scope 2 of the endoscope device 1 equipped with the scope 2 and simultaneous type electron scope 3, the projection light of the light source lamp of the light source device 4 passes through a condenser lens and a rod lens 29 and then passes through the rotary color transmission filter 32 of a light source connector 13 to become light beams of R, G and B successively, which are converged on the incidence end surface of the light guide 19 through a condenser lens. Further, a color filter array 24 is provided in front of the solid-state image pickup element 23 of the scope 3. The output signals of the elements 23 of the scopes 2 and 3 are sent to a CCD driving circuit and video process circuits 6 and 7 through a preamplifier 28 and signal cables 26 and 27. The signal of a position detection sensor 39 is sent to a rotation control circuit 47 and a timing generator 49 to synchronize the circuits.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides illumination light suitable for a scope equipped with a field-sequential image conveying means, a scope equipped with a face-to-face image conveying means, and a fiber scope. This article relates to an endoscopic device that can be used.

[Problems to be solved by conventional techniques and inventions] In recent years,
An endoscope (scope or ) are widely used.

In addition, a solid-state image sensor such as a charge-coupled device (COD) is
Various types of electronic scopes used as image means have also been proposed.

This electronic scope has advantages such as higher resolution than a fiber scope, easier recording and reproduction of images, and easier image processing such as enlargement of images and comparison of two images.

Furthermore, various electronic scopes using solid-state imaging devices such as charge-coupled devices (CODs) as imaging means have been proposed. This electronic scope has advantages such as higher resolution than a fiber scope, easier recording and reproduction of images, and easier image processing such as enlarging images and comparing two images.

The color image capturing method of the electronic scope includes, for example, a method of sequentially switching illumination light to R (red), G (green), B (blue), etc., as shown in Japanese Patent Laid-Open No. 61-82731. For example, as shown in Japanese Unexamined Patent Application Publication No. 60-76888, there are filter arrays in which color filters that transmit color lights such as R, G, and B are arranged in a mosaic pattern in front of a solid-state imaging element. There is a simultaneous type with a The frame-sequential method has the advantage that the number of pixels can be reduced compared to the simultaneous method, while the simultaneous method has the advantage of not causing color shift.

Further, the electronic scopes are diversified depending on the purpose of use. For example, for upper or lower gastrointestinal use,
Those with an insertion portion having an outer diameter of around 10φ are used.

On the other hand, for example, for bronchial use, the outer diameter is usually 5φtt.
The following are required after m. In this way, for various electronic scopes with a wide range of insertion tube outer diameters,
Physically and performance-wise, it is impossible to use the same silver image element and the same scale imaging system. That is, for example, in order to realize an electronic scope for the bronchus (II [l diameter)], an image carrier element with a small number of pixels must be used.

In cases where the number of pixels is small, in order to prevent a decrease in resolution, instead of using a simultaneous imaging method using a color mosaic filter, the image is illuminated sequentially with light of each wavelength of R, G, and B. A frame-sequential color imaging system is advantageous, in which images are conveyed in a plane-sequential manner under the illumination, and these images are combined and displayed in color.

On the other hand, for those with an outer diameter of around 10φ, it is advantageous to increase the number of pixels and use a simultaneous imaging method in order to improve image quality.

Incidentally, the fiber scope or the electronic scope is generally used by being connected to a light source device that supplies illumination light suitable for each scope.

The illumination light of the light source device differs depending on whether the image conveyance method of the endoscopic V1 device is a field sequential or simultaneous method, and even in the same field sequential imaging method, the type of solid-state image sensor and the type of endoscope are different. Since it is necessary to change the spectral intensity and blanking period of each color depending on the application, the user must prepare a different light source device and perform different operations depending on the type of scope, which reduces economic efficiency and efficiency. It was bad.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances. The purpose of the present invention is to provide an endoscopy device that is suitable for the type of image sensor and the use of the endoscope.

[Means and effects for solving the problem] The present invention incorporates a motor having a connecting means capable of transmitting rotation to a light source device that emits white light, and a color transmission filter is attached to a light source connector connectable to the light source device. By having a built-in device, a common light source device can be used.

[Embodiment] Fig. 1 and Fig. 2 relate to an embodiment of the present invention, Fig. 1 is a block diagram showing the configuration of the family celebration 11 device, and Fig. 2 (a
) is a sectional view showing the structure of the light source connector, and Fig. 2(b)
FIG. 2 is a perspective view showing a connecting means.

Family celebration&ll device 1 includes a field sequential electronic scope 2, a simultaneous electronic scope 3, a light source device 4, a field sequential camera control unit 6, and a simultaneous camera control unit 7.
and a monitor 8.

The screen-sequential electronic scope 2 and the simultaneous electronic scope 3
has an insertion section 9 of lII length and an operation section 11 connected to the rear end side of the insertion section 9, and universal cords 12a, 12b are extended from the operation section 11, and the universal cords 12a, 12b are extended from the operation section 11. Light source connector 13a at the tip of 12b
, 13b are provided. Furthermore, the light source connector 13a
, 13b are extended with signal cables 14a, 14b, and signal connectors 16a, 16b are provided at the tips of the signal cables 14a, 14b.

Connector 13a of each electronic scope 2.3.

16a: Connect 13b and 16b to each m child scope 2.
A light source connector receiver 17 is provided on the front surface of the housing of the light source device 4, for example, and a signal connector receiver 18a is provided on the front surface of the housing of the field sequential camera control unit 6, so that the camera control unit 6 can be set in a usable state. A signal connector receiver 18b is provided on the front surface of the housing of the simultaneous camera control unit 7, for example. The light source connector receiver 17 can be connected to a simultaneous type light source connector 13b.

Note that the light source connectors 13a, 1 of each electronic scope 2.3
3b is provided with an air/water supply connector (not shown), which can also be connected to the connector receiver 17.

A light distribution lens system 21 is provided at the tip end surface of each electronic scope 2.3 so as to be located at the output end surface of a light guide 19 that transmits illumination light. Further, an objective lens system 22 is provided adjacent to the light distribution lens system 21, and a solid-state image pickup device 23 is provided at the imaging position thereof.

In addition, a color filter array 24 is installed in front of the solid-state image carrier 23 installed at the tip of the simultaneous electronic scope 3.
is heavily weighted.

At the rear end of the solid-state image sensor 23, a signal line 26 for transmitting the output signal of the solid-state image sensor 23 via a preamplifier 28 and a signal line 27 for transmitting a drive signal for driving the solid-state image sensor 23 are connected to the light guide 19. The light source connector 16 is inserted into the signal cable 14 through the light source connector 13.
b) is established.

A cylindrical narrow diameter portion 31 housing, for example, a cylindrical rod lens 29 is provided protruding from the incident end surface of the light source connector 13a so as to be located on the optical path of the light guide 19.

On the optical path between the entrance end face of the light guide 19 and the exit end face of the narrow diameter portion 31, there are disc-shaped discs of red (R), green (G),
A rotating filter 33 on the right side of the color transmitting filter 32 of the three primary colors shown in FIG.

The rotary filter 33 has a rotary shaft 37 supported at both ends by ball bearings 36°36, and one rotary shaft 37.
7 protrudes from the rear end surface of the light source connector 13, and a flat connecting portion 38 is connected to the distal end thereof.

A color transmission filter 3 is provided in the circumferential direction of the rotary filter 33.
A plurality of holes (not shown) are provided for detecting the position of No. 2, and position detecting sensors 39 such as light emitting elements and photosensors are provided on both sides of the plate surface.

The signal line 41 of the position detection sensor 39 is connected to a male contact 42 provided on the rear end surface of the light source connector 13.

The optical 8i device 4 includes a light source section 44, a rotary filter driving motor 46, a rotation control circuit 47, a dimming circuit 48, and a timing generator 49.

The light source connector receiver 17 of the light source device 4 is configured such that the narrow diameter portion 31 of the light source connector 13 can be inserted thereinto, and is fixed by a fixing means (not shown).

The light source section 44 is composed of a light source lamp 54 and a condensing lens 56, and is arranged so that the optical path of the rod lens 29 of the light source connector 13 and the light emitted from the condensing lens 56 coincide. .

A large diameter portion 53 having a concave portion 52 in the radial direction of the distal end surface is connected to the tip of the drive shaft 51 of the rotary filter drive motor 46, and at the same time when the light source connector 13 is connected, the concave portion 52 is adapted to fit into a connecting portion 38 of the rotating shaft 37 protruding from the rear end surface of the light source connector 13.

At the same time as the light source connector 13 is connected, the male contact 42 is connected to a female contact 43 provided on the light source device 4.

The rotary filter drive motor 46 is connected to a timing generator 49 and a rotation control circuit 47 connected to the position detection sensor 39 via the male contacts 42 and female contacts 43 by a signal line.

Further, the dimming circuit 48 is connected to a light source lamp 54.

The frame-sequential camera control unit 6 and the simultaneous camera control unit 7 each incorporate a COD drive circuit and video processing circuits 57a and 57b, a timing generator 49, a light control circuit 48, and a monitor 8 for obtaining observation images. It is connected to the.

The COD drive circuit and video process circuit 57a, 5
7b is a contact 58a, 59a and a contact 58b provided on the signal connectors 16a, 16b.

59b.

By the way, the light emitted from the light source lamp 54 is transmitted through the condensing lens 56.
The light is condensed by the rod lens 29 and transmitted through the rod lens 29, and is converted into illumination light of each wavelength of R, G, and B sequentially by the rotating color transmission filter 32, and then focused on the incident end surface of the light guide 19 by the condenser lens 34. It is now possible to do so.

The light emitted from the light guide 19 is transmitted through a light distribution lens system 21 to illuminate the subject. The observed image is formed by the objective lens system 22 onto an image area (not shown) of the solid-state image carrier 23 and photoelectrically converted, then amplified by the preamplifier 28, passed through the signal line 26, and then sent to the signal connector 1.
6a, 16b, and the COD drive circuit and video processing circuit 57a, 57b via contacts 58a, 58b.
It is now entered into In addition, the solid-state imager 2
3 includes the COD drive circuit and video process circuit 5.
A clock for driving the solid-state image carrier is applied from 7a, 57b via a signal line 27 via contacts 59a, 59b of signal connectors 16a, 16b.

The COD drive circuit and video process circuit 57a, 5
The signals input to 7b are color signals R and G.

, B and output to the monitor 8 and the dimming circuit 48. The monitor 8 displays the observed image,
In the dimming circuit 48, the light source lamp 5 is
It is designed to adjust the light intensity of 4.

The timing generator 49 applies signals to the COD drive circuit and video processing circuits 57a and 57b,
It controls the solid-state R element 23 to perform signal processing in synchronization with the drive pulse used for signal reading, and also outputs a signal to the rotation control circuit 47 that controls the rotation speed of the rotary filter drive motor 46. ing. Further, the rotation control circuit 47 feeds back the rotation speed of the rotation filter 33 using the position detection sensor 39, and synchronizes it with the signal from the timing generator 49.

Note that a discriminating means capable of discriminating the type of filter is provided, and a signal indicating the type of filter is sent to the timing generator 49, and the COD drive circuit and video processing circuit 57a
may be controlled.

Further, the color transmission filter may be used as a filter for special observation such as infrared observation.

[Effects of the Invention] As explained above, according to the present invention, each electronic scope has a built-in color transmission filter adapted to its characteristics in the light source connector, so there is no need to change the light source device depending on the electronic scope used. light source equipment can be shared,
This has the effect of simplifying operations.

4, ff1l Simple explanation of the drawings FIGS. 1 and 2 relate to embodiments of the present invention. FIG. 1 is a block diagram showing the configuration of the endoscope device, and FIG. 2(a) is a diagram showing the structure of the light source connector. A cross-sectional view showing the structure, and FIG. 2(b) is a perspective view showing the connecting means.

4...Light source device 13...Light source connector 19...Light guide 33...Rotating filter 38...Connection part 46...Rotary filter drive ball Figure 1 Figure 2 (b)

Claims (1)

[Claims] A light source device that emits white light is provided with a filter that sequentially transmits each color light in a plane-sequential manner on an incident end face of a connectable light guide, and a driving means for driving the filter is provided in the light source device. Endoscope equipment.