JPS5969033A - Endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope that allows an easy-to-see observation image to be obtained on an 'I' V system or an electronic viewfinder when a strobe light is emitted.

A conventional endoscope is constructed as shown in FIG. In other words, 1 is an endoscope, 2 is a distal end, 3 is a curved part, 4 is a flexible part, 5 is an operating part, 6 is an image kite, 7 is a light kite, and 8 is a light source device. Observation is made by looking through a provided optical finder.Furthermore, the light source device @8 includes, for example, a continuous light source 8a such as a lamp, a pulsed light source 81 such as a strobe, and a movable mirror as shown in FIG. Normally, the continuous light #8a shown in the figure passes through a condensing lens to a reflecting mirror 8.
The observed image from the continuous light source 8a is seen and perceived in the optical viewfinder by being reflected by the light kite 7, but when the strobe light is set to ffO, the movable mirror 8c first moves to the dotted line position, and then Strobe light source 8
b emits light and enters the light guide 7, and at this time, it is picked up by the finder). (An endoscope that receives light for imaging is considered. According to the endoscopy done in 1' (fr-), normally a continuous light source is used and observation is done through an optical viewfinder, giving peace of mind. Sometimes a strobe light source emits light, and the observed image can be observed on a TV monitor or electronic viewfinder, and can be immediately recorded, played back, transmitted, and monitored by many people at the same time. Shorter and therefore very clear observation image static I
L image special stirring is obtained. However, in this case, the light emission timing of the strobe light source is limited due to image reading by the image sensor, and if it deviates from this limit, unevenness in the amount of light will occur on the screen.

In addition, the screen of a 'J' V monitor or electronic fine lens is quite bright when the strobe is fired, but the area before and after it is dark, and the automatic brightness adjustment of the TV monitor or electronic viewfinder may be activated, making it difficult for the strobe to fire. The observed image appears suddenly from the dark screen, making it difficult for the observer to observe properly due to the glare! ! Te
Become l and switch.

1. In view of the above points, the present invention emits a strobe in synchronization with the vertical synchronization signal of the 'F■ system or electronic finder used, and the front and back of the observed image by the strobe light are white or close to white. The purpose is to provide an endoscope capable of projecting an image of the present invention, and this will be explained below with reference to an embodiment shown in the drawings. An example is shown, and the light source device 8 shown in FIG. 2 is used as the light source device.

10 is an image sensor such as a CCD that receives light through the photoacoustic imaging lens 11 of the image kite 6 of the endoscope, 12 is a camera control unit that converts the signal from the image sensor 1o into a video signal, and 13 is an image sensor. 14 is a switch circuit; 15 is a nice play device such as an electronic viewfinder or a monitor; 1;
6 is a strobe light emitting switch, 17 is a synchronization circuit of the TV system or electronic viewfinder used, and 18 is a vertical synchronization signal input from the synchronization circuit 17, and when a tri-power signal is input from the strobe light emission switch 16, the vertical synchronization is performed. A vertical synchronization signal is input from a 20-digit synchronization circuit 17, a light source control circuit that controls the power supply circuit (not shown) of the continuous light source 8a and the power supply circuit 19 of the strobe light source 81) in synchronization with the signal, and the strobe light emission switch 16. When a tri-force signal is input from the 111
This is a switch control circuit that opens 4.

The embodiment of the present invention is constructed as described above, and its operation will be explained below with reference to the time chart in FIG.
) indicates the operation of the strobe lighting switch 16,
(B) is the tri-force signal output from the strobe light emission switch 16, (C) is the vertical synchronization signal from the synchronization circuit]7, (
D) is the light emission of the strobe light source 81), (E) is the video signal output from the camera control unit 12, (F>
A white level or near-white clay level pulse voltage (CG) outputted from the n-pulse voltage generation circuit 13 via the switch circuit 14 is a video signal input to the display device 'GV 15. Normally, the video signal output from the camera control unit 12 includes a dark signal, and is sent from the pulse voltage generation circuit 13 to the swing circuit j-
A pulse voltage corresponding to a white level or a gray level close to white through 4K is superimposed on the video signal, and a white or gray screen close to white is displayed on the Nice Play device.

When the strobe light emitting switch 16 is turned on, regardless of the ON time, a constant time tri-force signal is input to the control 1 circuits 18 and 20. After the trigger signal is input, the control circuit 18 turns off or blocks the continuous light intensity by an appropriate means in synchronization with the first vertical synchronization signal, and switches from the optical finder to the image sensor to output the light from the image kite. is imaged on the image pickup device, and in synchronization with the second vertical synchronization signal, the LOD power supply circuit 19 is activated in pulses, and in synchronization with the third vertical synchronization signal, the continuous light source 8a is activated. The light enters the light kite 7 and switches to the optical finder again. - On the other hand, the control circuit 20 controls the light emitting switch 16 to the light emitting switch 16.
<After No. H is input manually, the switch circuit 14 is opened in synchronization with the second vertical synchronization signal, and the switch circuit 14 is closed in synchronization with the third vertical synchronization signal. That is, when the smartphone light emitting switch 16 is turned on,
The 'rv system used is still synchronized with the vertical synchronizing signal of the synchronizing circuit 17 of the electronic finder.The continuous light source 8a is turned off or blocked, and the strobe light '#81) is emitted and illuminated, and the display device 15 Then, until then, a white or white ((nearly gray screen is displayed, or when the strobe light source 8b emits light, the strobe light source 81) is displayed, and a more illuminated observation image is displayed. After that, the display device 15 displays the image again. A white or near-white gray screen appears.

As described above, according to the present invention, the display device f
Normally, a white or nearly white screen is displayed on ff, but 'F is used when firing a strobe light source.
■The system tfv emits a strobe light source in synchronization with the vertical synchronization signal of the electronic viewfinder, so that the display device is properly illuminated and imaged by the strobe light source. The observed image is white or (4 white) (because the screen is switched from a near gray screen, the automatic brightness adjustment of the display device does not create an unauthorized image), and the difference in brightness when switched to the observed image is small. This has the effect of providing an observation image that is very easy for the observer to see.

In the above description, the image produced by the strobe light source is only for one frame, but this image may be memorized by appropriate means and displayed as a stationary malleable object on a monitor or electronic finer for several seconds. Furthermore, it goes without saying that the present invention can be applied to any endoscope having any configuration as long as it is an endoscope in which only an observed image by emitted light is detected by an image sensor and displayed on a nice play device. Nor.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the configuration of a conventional endoscope, Fig. 2 is a schematic diagram showing an example of the light source device of the endoscope, and Fig. 3 is a schematic diagram of an embodiment of the endoscope according to the present invention. , FIG. 4 is a diagram showing a time chart of the operation of the endoscope shown in FIG. 3. 8b...Strobe light source, 10...Image sensor, 1
DESCRIPTION OF SYMBOLS 1... Imaging lens, 12... Camera control unit, 13... Pulse voltage generation circuit, 14...
... switch circuit, 15 ... display device,
16... 7-inch strobe light emission, 17... Synchronous circuit, 18... Light source control circuit, 19... Power supply circuit, 20... Switch control circuit. Agent: Yasushi Shinohara Figure 1, Figure 2, Figure 3, Figure 4 (A)--Low (B) (.) 1 Continued from page 1 0 Author: Yasuhiro Ueda, 2, Hatagaya, Shibuya-ku, Tokyo 43-2 Olympus Optical Co., Ltd. Inventor Susumu Nishigaki - 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inventor Atsushi Tadashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Inventor: Yuzuki Yuzuki, 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inventor: Kaiaki Nakamura, 2-43-2 Hatagaya, Hatagaya, Shibuya-ku, Tokyo Inventor: Kaiaki Nakamura, within Olympus Optical Industry Co., Ltd.

Claims (1)

[Claims] An image sensor is installed at the exit end of the image guide so as to be optically switchable with the optical finder through an imaging lens, a camera control unit that converts the signal from the image sensor into a video signal, and an endoscope. The electronic viewfinder built into the operation unit is still a nice play device like an external monitor, the pulse voltage generation circuit generates a pulse voltage of white or near-white gray level in synchronization with the video signal, and the strobe light switch is turned on. When vc'
a switch circuit that is opened for each frame of the video signal in synchronization with a vertical synchronization signal of a synchronization circuit of the I''V system, and the pulse voltage from the pulse voltage generation circuit is applied to the video signal via the switch circuit. Overlap: An endoscope that is folded and input to a display device.