JPS62296Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a television camera photographing device that uses a television camera and a television and is used, for example, to show a manuscript to a large number of people at a seminar or school classroom.

Traditionally, overhead projectors have been used for this type of application. This involves creating a manuscript on transparent paper and projecting it onto a screen.
It takes time and effort to prepare a manuscript, and during projection, the manuscript is exposed to strong light, which makes it difficult to see, and it is also impossible to enlarge a portion of the manuscript.

The above drawbacks can be overcome by photographing the original with a television camera and displaying it on a television.
However, when a television camera is used to show a manuscript to a large number of people, the lecturer has the disadvantage that he or she cannot tell whether the television camera is accurately photographing the desired part of the manuscript unless he or she watches the television monitor. For this reason, each time the television camera was moved, it was necessary to look at the television monitor and adjust the positions of the television camera and the document.

In order to eliminate this drawback, this invention uses light to visualize the photographic surface of a television camera (in this specification, the photographic surface of a television camera refers to the area shown by the television camera and monitor television). The important purpose of this invention is to be able to determine the subject area of the television camera without looking at the television monitor, to be able to accurately photograph the necessary parts of the document, and to Because the collimation means that displays the subject surface with light is linked to the movement of the TV camera,
Even if you move the TV camera and change the part of the document being photographed, the subject will always be clearly visible.
To provide a photographing device for a television camera which allows a lecturer to easily view a manuscript if necessary since the subject surface is displayed even with light.

Hereinafter, embodiments of this invention will be described based on the drawings.

The television camera photographing device shown in FIG. 1 includes a television camera mounting base on which a television camera 2 is movably mounted in correspondence with a manuscript table 1, and collimation means 13 for displaying the subject surface of the television camera. Equipped with

The mounting base for the television camera shown in FIG. 1 consists of a support tube 3, a slide rail 4, and a trolley 5. A slide rail 4 is connected to the support tube 3 so as to be vertically movable, and a trolley 5 is attached to the slide rail 4 so as to be movable in the longitudinal direction. , a television camera 2 is mounted rotatably within a horizontal plane.

The support tube 3 is formed into a cylindrical shape so that it can rotate in a horizontal plane, and its lower end is connected to the document table 1.
It is inserted through a cylindrical support 6 vertically fixed to the document table 1, and its lower end is attached to the document table 1 via a thrust bearing 7.
A deceleration motor 8 is fixed to the upper end, as shown in FIGS. 1 and 2.

The deceleration motor 8 is connected to and rotates a threaded rod 9 that is rotatably supported in parallel with the support tube 3, and the threaded rod 9 is screwed into a threaded hole in the slide rail 4 and rotates. The slide rail 4 is moved up and down by the rotation of the slide rail 4.

The slide rail 4 is moved up and down by a threaded rod 9 in a horizontal plane without rotating.
A key groove is carved into which the key 10 slides, and
As shown in FIG. 2, a keyway 11 is carved on the top surface so that the trolley 5 can slide along this.

The trolley 5 is attached to this. A pin 12 for rotating the television camera 2 facing vertically is provided so that the television camera 2 can rotate within a horizontal plane, and the television camera 2 is rotatably attached around this pin 12.

The collimating means 13, as shown in FIG.
4, a condensing lens 15, a collimating member 16, an aperture 17, and a lens 18, and is fixed to the television camera so as to move in conjunction with the movement of the television camera.

The light source 14 has sufficient brightness to illuminate the entire object surface of the television camera, and the light emitted from the light source 14 is focused by a condenser lens 15 located in front of it.

The collimating member 16 is designed to form an image on the original document that is equivalent to the object surface of the television camera 2, that is, its shape is similar to that of the object surface of the television camera, and its size is similar to that of the object surface of the television camera 2. The image is formed through a rectangular window 19 whose size is equal to the field of view of the television camera.

The light passing through the collimating member 16 forms an image of a bright collimating member window 19 on the document by a lens 18.

In this way, by forming a bright rectangular image on the document that is equal to the field of view of the television camera, the field of view of the television camera becomes brighter, which has the effect of brightening the document and the television image.

A diaphragm 17 arranged in front of the condensing lens 15 adjusts the brightness of the image. As shown in Figure 1,
When the TV camera 2 is moved up and down to change the coverage area of the TV camera, in other words, when the TV camera is brought closer to the document and a part of the document is enlarged and displayed, the closer the TV camera 2 is to the document, the brighter the subject becomes. Become. Therefore, in this case, the closer the television camera 2 is to the document, the more the aperture is narrowed down to reduce the actual brightness of the light source, regardless of the distance between the television camera and the document.
It is best to keep the illuminance of the subject constant.

The collimating means 13 is ideally the television camera 2
It forms an image that perfectly matches the surface of the object, but in reality, even if this image deviates slightly, it is still practical.

As shown in FIG. 1, a collimating means 13 is fixed to the television camera 2, and the television camera 2 and the collimating means 1
3 moves up and down as one, the object surface of the TV camera 2 and the imaging position of the collimation means may be slightly shifted depending on the height of the TV camera 2, but the TV camera cannot be placed extremely close to the document. The parallax is sufficient for practical use as long as it is not attached.

The parallax between the two is determined by the television camera 2 and collimation means 13.
The closer the lenses, the fewer the number of lenses. Generally, the optical axis of the television camera and the optical axis of the collimating means are arranged parallel or substantially parallel.

In FIG. 5, the subject area is adjusted using the zoom lens 20 of the television camera without vertically moving the television camera 2 attached to the trolley. The collimation means fixed to the television camera 2 having this structure includes a zoom lens 21 similar to the television camera, and the zoom lens 21 is connected to the television camera through a flexible wire 22 and a feed screw 23, which are connection mechanisms. The lens 20 is connected to the lens 20 .

The feed screw 23 is screwed into a threaded rod 24, and the screw rod 24 is connected to a reversible motor 25. By moving the feed screw 23 left and right with the motor 25, the TV camera 2 and collimation are adjusted. The zoom lenses 20 and 21 of the means 13 are interlocked to match the object plane of the television camera and the image formed by the collimating member.

In this invention, the collimating means is connected to the television camera or the mounting base of the television camera via a coupling mechanism, but as shown in Fig. 1, the collimating means is integrated with the television camera. The interlocking mechanism that moves vertically and horizontally is a member that fixes the collimation means to the television camera.

Although the collimating means is fixed to the television camera in FIGS. 1 and 5, the collimating means may be fixed to a mounting base close to the television camera.

FIG. 6 shows another embodiment of the collimating means,
In this collimation means 13, a specular reflection condensing light bulb is used as the light source 14, and a variable resistor 26 is connected in series with the light bulb, and the brightness of the bulb is adjusted by changing the resistance value of the variable resistor 26. do.

The collimating means 13 of this structure is shown in FIGS. 1 and 4.
As shown in the figure, a variable resistor 26 is connected to the threaded rod 9, and when the threaded rod 9 is rotated and the television camera 2 approaches the original, the resistance value of the variable resistor 26 increases, and conversely, when the television camera 2 moves away from the original, the resistance value increases. Adjusting the value to a smaller value has the effect of making the brightness of the original more uniform.

Furthermore, as shown in FIG. 1, the television camera 2 is moved up and down using a threaded rod 9, as shown in FIG.
8, fix the arm 33 to the worm wheel 32 that engages with the worm 34, connect one end of the flexible wire to the tip of the arm 33, and connect the other end of the flexible wire to the lens 29 for focus adjustment. The focus of the TV camera is adjusted according to the vertical movement.

Not only the television camera, but also the focusing lens of the collimating means is connected to the threaded rod via a flexible wire, worm wheel, worm, and pulley with the same mechanism as the television camera, and the collimating means is The image is always focused on the original even if it is moved up or down.

A deceleration motor 8 for rotating the threaded rod is controlled by a snap switch 30, and the slide rail 4 rises when the snap switch 30 is pushed upward, descends when pushed downward, and is stopped in neutral.

The collimating means shown in FIG. 3 includes a lens in front of the collimating member, but if the light source is a point light source, for example, the image of the collimating window can be relatively clearly projected onto the document without necessarily using a lens. It is possible to tie.

If a rectangular frame-shaped slit 31 is used as the collimating member 16, as shown in FIG. The subject surface is displayed.

As described above, in the television camera photographing device according to this invention, the field of view of the television camera is displayed by the collimation means, so the photographing area of the television camera can be determined without looking at the monitor TV, and You can easily and accurately photograph the desired location, and since the collimation means moves the TV camera to display the subject area, even if the TV camera changes the location of the document, the subject will not be captured. The screen is clearly visible at a glance, and since the screen of the TV camera is displayed as a light image, there is no need for a mechanism to display the screen between the TV camera and the document. It is easy and convenient to move, replace, or write in here. Furthermore, since the object surface is displayed as a light image, if necessary, it is possible to illuminate only the object surface brightly. In addition to displaying the image, it has many other benefits such as making the original and the TV monitor brighter and easier to see.

[Brief explanation of drawings]

Fig. 1 is a side view of a photographing device for a television camera showing an embodiment of this invention, Fig. 2 is a sectional view showing a support tube, slide rail, and trolley, and Fig. 3 is a sectional view showing an example of collimating means. 4 is a schematic side view showing a specific example in which the television camera and collimating means are linked to the rotation of the threaded rod, and FIG. 5 is a schematic side view showing a specific example in which the television camera and the zoom lens of the collimating means are linked to each other. A schematic side view, FIG. 6 is a sectional view showing a collimating means with adjustable brightness, FIG. 7 is a schematic side view showing a specific example in which the lens is driven by a threaded rod via a flexible wire, and FIG. 8 FIG. 2 is a schematic cross-sectional view showing another collimating means. 1... Original table, 2... TV camera, 3... Support tube, 4... Slide rail, 5... Trolley, 6
...Strut, 7...Thrust bearing, 8...Deceleration motor, 9...Threaded rod, 10...Key, 11...
...Keyway, 12...Pin, 13...Collimation means, 1
4...Light source, 15...Condensing lens, 16...Collimating member, 17...Aperture, 18...Lens, 19...
Window, 20...Zoom lens, 21...Zoom lens, 22...Flexible wire, 23...Feed screw, 24...Threaded rod, 25...Motor, 26...
... Variable resistor, 27 ... Pulley, 28 ... Flexible wire, 29 ... Lens, 30 ... Snap switch, 31 ... Slit, 32 ... Worm wheel, 33 ... Arm.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A mounting stand for a TV camera on which a TV camera is movably mounted in accordance with the manuscript, and collimation means for displaying the subject area of the TV camera, The secondary means is an optical collimating means, which includes a light source and a collimating member, and uses the light emitted from the light source to
an image of the collimating member is projected onto the subject plane of the television camera, the image of the collimating member coincides with or substantially coincides with the outer periphery of the subject plane of the television camera, and the collimating means is interlocked; It is connected to a television camera or a television camera mounting base via a mechanism, and the imaging position of the collimating member is adjusted in conjunction with movement of the television camera's subject surface, and the collimating means displays the television camera's subject surface. A television camera imaging device configured to (2) The television camera photographing device according to claim (1), wherein the mounting table on which the television camera is attached is movable only within a plane parallel to the manuscript table. (3) The television camera photographing device according to claim 1, wherein the document table is horizontal and the television camera is mounted above the document table facing downward. (4) The photographing device for a television camera according to claim 1, wherein the collimation means is linked to a zoom lens of the television camera. (5) The photographing device for a television camera according to claim 1, wherein the collimation means includes an aperture and the brightness of the photographic surface is adjusted according to the photographic surface area of the television camera. (6) The mounting base has a support tube that is rotatably supported vertically, a slide rail that is vertically movable and horizontally connected to the support tube, and a slide rail that is connected to the slide rail so that it can move freely in the longitudinal direction. 2. A television camera photographing device according to claim (1), which is comprised of a trolley, and wherein the television camera is rotatably connected to the trolley in a horizontal plane. (7) Utility model registration claim No. 1 in which the focus of the television camera is adjusted by vertical movement of the television camera.
The television camera photographing device described in (1).