JPS6224279Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cathode ray tube imaging device, and its purpose is to block external light from a peephole for visual observation during imaging.

Conventionally, equipment having a cathode ray tube for observation is used for visual observation, and is often used by attaching a photographing device to record the screen. At this time, since it is not easy to attach or detach the photographic device each time, a viewing window is usually provided so that it can be used for both purposes. Conventionally, as shown in FIG.
It consisted of a camera 3, a lens 4, a release 5, and a lens shutter 6. This imaging device main body 1 was used by being attached to a device having a cathode ray tube 7 for observation.

Then, when the imaging device body 1 is attached to the cathode ray tube 7 and the image on the cathode ray tube 7 is to be visually observed, the observation window 2 is opened and the observation window 2 is closed. A release 5 is driven to open a lens shutter 6, and an image of a cathode ray tube 7 is taken through a lens 4 onto a film of a camera 3.

In this case, during visual observation, the peephole 2 is opened by a mechanical mechanism, and when photographing, the peephole 2 is closed. However, if you forget to close the peephole 2 during photographing, the light other than the screen light necessary for photographing may be The drawback was that it was not possible to take photographs in proper conditions due to the presence of external light.

In order to prevent this, a method may be considered in which the operation of the lens shutter 6 and the opening/closing operation of the viewing window 2 are mechanically or electrically linked.

However, when mechanically opening and closing the viewing window 2 in conjunction with the release 5, a movable part must be provided to open and close the viewing window 2. At this time, there are disadvantages such as the generation of operating noise, the heavy drive of the release 5 due to mechanical friction, the long operating time due to inertia, and the need for a complicated interlocking mechanism.

When electrically opening and closing the viewing window 2 in conjunction with the release 5, a driving power source, circuit, and moving parts are required in addition to the above, resulting in high power consumption and the weight of the photographing device. There is.

The present invention eliminates these drawbacks. An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 is a block diagram of a cathode ray tube photographing apparatus which is an embodiment of the present invention, and FIG. 3 is a block diagram of the same apparatus. In the figure, 11 is the camera body, 12 is the liquid crystal panel 1
13 is a camera, 14 is a lens, 15 is a double release, 16 is a circuit for driving a liquid crystal plate usually consisting of a switch, etc., and a power source; 1
Reference numeral 7 denotes a lens shutter, and each part is arranged in the same manner as in FIG. The imaging device main body 11 is attached to a device having an observation cathode ray tube 18.

Further, the liquid crystal plate 12a is an electrical shielding plate against external light. In other words, the liquid crystal plate 12a has liquid crystal molecules sandwiched between two transparent electrodes and a polarizing plate in a sandwich-like manner. When a voltage is applied to the transparent electrodes, the liquid crystal molecules are displaced in a certain direction and become opaque, blocking external light. When it is shielded from light and the application of voltage is stopped, it returns to its original transparent state.

Next, its operation will be explained.

Attach the imaging device main body 11 to the cathode ray tube 18,
When visually observing the image on the surface of the cathode ray tube 18, the transparent liquid crystal plate 12a serves as the viewing window 12 for visual observation.

When photographing, first the double release 15 is driven, and the liquid crystal plate driving circuit 16 applies voltage to the liquid crystal plate 12a, making it opaque to block external light, and opening the lens shutter 17 to transfer the image on the cathode ray tube 18 to the lens 14. Through camera 13
Photographed on film.

Next, when the pressure on the double release 15 is stopped, the voltage applied to the liquid crystal plate 12a is turned off, and the viewing window 12 returns to its transparent state again.

As is clear from the above embodiments, the present invention, when photographing a signal waveform displayed on a cathode ray tube with a general camera, covers the space between the cathode ray tube and the camera with the main body of the photographing device, and allows the observer to take a picture while looking at the measured waveform. When the double release is pressed during the camera's turn, the camera's shutter is turned off and the viewing window is shielded from light.Therefore, there is no need for a special camera for observing signal waveforms, and it is easy to attach and detach a regular camera to observe signal waveforms. It has the effect of being able to take pictures.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional cathode ray tube photographing apparatus, FIG. 2 is a block diagram of a cathode ray tube photographing apparatus according to an embodiment of the present invention, and FIG. 3 is a block diagram of the apparatus. 1...Photographing device body, 2...Peep window, 3...
Camera, 4... Lens, 5... Release, 6...
Lens shutter, 7...Cathode ray tube, 11...Photographing device body, 12...Peephole, 12a...Liquid crystal plate, 13...Camera, 14...Lens, 15...
Double release, 16...LCD drive circuit and power supply, 17...Lens shutter, 18...Cathode ray tube.

Claims (1)

[Scope of utility model registration request] A cathode ray tube that displays the signal waveform, a camera that takes pictures of the signal waveform by opening and closing a mechanical shutter using a double release operation, and a camera that is removably attached to the cathode ray tube and camera, and that displays the screen light necessary for the shooting. a photographic device main body that blocks external light other than that; a peephole attached to the main body that allows the cathode ray tube to be viewed; and a liquid crystal that is attached to the peephole and makes the liquid crystal transparent or light-shielded by the operation of the double release. A cathode ray tube imaging device equipped with a board.