JPS63153979A - Crt photographing system - Google Patents

Abstract

PURPOSE:To take a photograph without having exposure nonuniformity, by displaying an arbitrarily designated integer number sheets of still pictures while the shutter of a CRT photographing camera is opened completely synchronizing with a field signal, and controlling an exposure time. CONSTITUTION:The field signal is supplied to the clock terminal CK of a counter 24, and the signal at the time of opening fully the shutter is inputted to the clear terminal CL. Waveforms as shown in figure are outputted from the outputs of the terminals QA and QB of the counter 24. Those outputs of the terminals QA and QB are inputted to an NAND gate 26, and for example, at the time of completing three field periods (in other words, a third field after counting from the rise time t1 of a field pulse after the clear signal is supplied to the clear terminal CL), an output can be obtained. By detecting the trailing edge of the output signal, the erasure of the still picture is performed under the control of the control circuit 12 of a CRT monitor 10.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a system for displaying still image information from an electronic scope on a CRT (cathode ray tube) monitor and photographing it in the field of endoscopy. be.

[Conventional technology]

Conventionally, when a still image displayed on a CRT monitor of this type of endoscope device is photographed using a CRT photographing camera, the exposure time has been determined by the shutter speed of the camera.

[Problem that the invention seeks to solve]

Therefore, when a CRT monitor is photographed with a CRT photographing camera, the exposure time is controlled only by the shutter speed of the camera, so the scanning lever of the CRT monitor and the shutter of the camera are not synchronized. As a result, there was a drawback that exposure unevenness occurred in the photographs taken.

The purpose of the present invention is to eliminate the drawbacks of the above-mentioned stool rice, and to
Control the exposure time on the monitor side, 1f! C to eliminate uneven output
It provides RT fi shadow system.

[Means and operations for solving the problems] In order to achieve the above-mentioned object of the present invention, the CRT imaging system of the present invention has a CRT imaging system that displays still images collected by an endoscope.
A CRT (cathode ray tube) monitor, a CRT camera that takes a still image on the CRT monitor, and a CRT camera that processes field signals from the CRT monitor while the shutter of the camera is open to produce a predetermined image. The present invention is characterized by comprising a control means for erasing the still image displayed on the CRT monitor and controlling the exposure time of the camera when an integer number of fields is reached. According to the invention, C
It synchronizes with the field signal of the RT monitor, takes an integer field of still images when the shutter of the CRT camera is fully open, and controls the camera's exposure time.
It can eliminate uneven exposure.

〔Example〕

The invention will now be described in detail with reference to one drawing.

Overall configuration of CRT imaging system First, the overall configuration of the CRT imaging system of the present invention will be explained.
This will be explained with reference to the diagram.

A shutter SW (switch) 3 is provided on the outside of the CRT camera 1, and a shutter 2. A detection circuit 4 and a control circuit 5 are provided.

Further, a detection circuit 7 and a control circuit 8 are similarly provided inside the CRT monitor 10. Next, a connector 7 is provided at the lens tip 6 of the CRT camera 1. Similarly, a connector 14 is also provided on the CRT tube surface portion 13.

CRT camera 1 having connector 7 and connector 1
The CRT monitor 10 having a CRT monitor 4 is a hollow space where outside light is blocked. They are combined at Tsukufu 6.

Furthermore, an electrical connector 8 and a CR are connected to the CRT camera 1.
An electrical connector 15 is provided on the T-sonitor 10, and the CRT photographing camera 1 and the CRT monitor 10 are electrically connected via a cable 9.

Overall Operation of the System Next, the operation of the entire camera system will be explained with reference to FIGS. 2 and 3.

First, FIG. 2 is a pictorial representation of the operation sequence performed between the camera 1 and the CRT monitor 1o.

FIG. 3 shows the correlation between the operations of the camera shutter 2 and the CRT monitor 10. In FIG.

When the switch s'w3 of the CRT photographing camera 1 is turned on (operation 1)), the signal is detected by the detection circuit 4 on the camera side and sent to the detection circuit 11 of the CRT monitor 1o through the cable 9.
It is sent to the CRT, inspected here, and then sent to the control circuit 12.
Erase the image on the monitor 10 (operation 2)). However, only raster images are displayed. Next, the detection circuit 4 on the camera side detects that the CRT camera camera 2 is fully opened (operation 3), and the detection circuit 11 of the CRT monitor 10
4) to display a still image of the integer field autumnal equinox (operation 4)-1), and then erase this image (operation 4)-2).

Next, the detection circuit 1111C on the camera side detects that the image has been erased in this way, and transmits it to the detection circuit 4 of the CRT camera 1, and the control circuit 5 closes the shutter 2 (operation 5). . Finally, the camera side detection circuit 4 detects that the shutter 2 is closed, and the CRT J o detection circuit JJ
K is transmitted, and the image is displayed again under control by the control circuit 12 (operation 6)).

Further, as shown in FIG. 3, the signal when the shutter is fully opened can be delayed by a time τ from the signal when the shutter SW3 is turned on.

Integer Field Autumn Equinox Image Display Next, with reference to FIG. 4, the integer field autumn equinox image display, which is a feature of the present invention, will be described.

FIG. 4A shows a control system for displaying one still image for, for example, three field periods in operation 3) in FIG. 2. That is, a clock pulse is input to the counter 20, and a field signal is also supplied. As a result, when only three fields have been counted, an output is supplied to the integer field detection circuit 22, which is detected and CR
T monitor 109! +1 control circuit 12 controls monitor 0 to erase the image. That is, only raster scanning is performed.

The above configuration is concretely configured as a circuit and the friend is the 4th B.
The operation timing chart thereof is shown in FIG. 4C.

In FIG. 4B, the field signal shown in FIG. 4C is supplied to the black terminal CK of the counter 24, and the signal when the shutter is fully open is similarly input to the clear terminal CL. There is. The counter 24 outputs an output signal such as θA, θ, and specific output as shown in FIG. i4c.

These θ and 03 outputs are input to the NAND gate 26, and at the end of the 3 field period (however, the clear terminal C
The output (Low level signal) is obtained at the third field (counted from the rising edge of the field pulse (instantaneous t□) after the clear signal is supplied to L<Vi:4
timets). Detecting the two downward slopes of this output signal,
The still image on the monitor is erased under the control of the control circuit 1N112 of the CRT monitor 10.

Modified Example Operations 1) to 6) explained in FIG. 2 can also be changed as shown in FIG. 5. Briefly, FIG. 5a shows a signal when the shutter switch 3 is turned on, and the operating time is τ. Figure 5 shows a field signal.

These two signals a and b are AND? -) and a delay line, and is processed there to obtain a control signal C for erasing the image. As is clear from the control signal of this image, the operation of displaying one display beat and display is performed in a series of sequences.

In this case, the display time T is the time when the camera 1's shutter 2 is fully open, and this is the number of fields you want to capture, that is, 1
Determined by the above integer fields.

Further, this display time T is defined by a delay line.

〔Effect of the invention〕

According to the present invention, the CRT is always synchronized with the field signal.
While the shutter of a photographing camera is fully open, still images of an arbitrarily specified integer field are displayed and the exposure time is controlled, which has the effect of allowing the cutting tool to be photographed without uneven exposure.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the entire system of the present invention; FIGS. 2 and 3 are explanatory diagrams for explaining the operation of the entire system of FIG. 1; FIGS. 4A to 4C are diagrams of the system shown in FIG. FIG. 5 is a diagram showing a modification of FIGS. 4A to 4C. 1... CRT camera, 2... camera, 3.
...Shutter switch, 4.11...Horizontal narrow circuit, 5.
12... Control circuit, 20.24... Counter, 22
...Integer field detection circuit, 30... Signal is also buried circuit. Applicant's representative Patent attorney Atsushi Tsuboi Figure 2 Figure 3 b Ficred) l! l"5 O c fue&/Kaku-ri Jusho P I Bashiga Figure 5 Procedural amendment 1. Indication of the case Japanese Patent Application No. 61-302152 2, Title of the invention CRT photographing system 3, Person making the amendment Case and Relationship Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent UBE Building 7, 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo,
Contents of amendment (1) On page 4, line 7 to line 8 of the specification, “Also, CRT
Similarly, a detection circuit 7. A control circuit 8 is provided. '' should be corrected to ``Also, a detection circuit 11 and a control circuit 12 are similarly provided inside the CRT monitor 10.'' (2) On page 7, lines 8 to 11 of the specification, it is stated that ``The QA and θB outputs of this counter 24 output signals as shown in FIG. 4C. "The output is," was corrected to "The QA and QB outputs of this counter 24 output signals as shown in Figure 4C. These QA and QB outputs are do.

Claims (3)

[Claims] (1) CR that displays still images collected by an endoscope
A CRT (cathode ray tube) monitor, a CRT camera that takes a still image on the CRT monitor, and a CRT camera that takes a still image on the CRT monitor.
It is characterized by comprising a control means for processing field signals from the T monitor and erasing the still image displayed on the CRT monitor when a predetermined integer number of fields is reached to control the exposure time of the camera. CRT imaging system. (2) The CRT photographing system according to claim 1, wherein the exposure control means is constituted by a counter and an AND gate. (3) The CRT photographing system according to claim 1, wherein the exposure control means measures the exposure of the image by displaying a still image on the monitor for three field periods. .