JPS597807Y2 - Video conversion adapter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video conversion adapter that guides video light from a video source to an imaging device.

A telecine adapter is used when recording images taken with an optical camera, such as an 8 mm or 16 mm camera, onto a videotape.

In this adapter, the image projected by a projector is once projected onto the screen of this adapter to form an image, and the light from this image is guided to a video camera, which is an imaging device, to capture the image and magnetically record it on a VTR. It is supposed to be done.

The screen of the adapter is generally a transparent type screen made of frosted glass or plastic.

For this reason, the image projected onto this screen has a low reflectance, so there is a problem that it is relatively dark and difficult to focus when viewed from the projection side, that is, from the projector side.

In addition, the screen that protects against fogged glass is usually provided on the outer surface of the adapter case, so it may be damaged or damaged.
It is often dirty.

The present invention has been made in view of these problems, and includes an adapter device for video conversion that guides video light from a video source to an imaging device, in which the video source is formed in a transmissive screen. In addition to using a projected image,
The present invention relates to a video conversion adapter device characterized in that an opaque auxiliary screen having a higher reflectance than the transmission screen is removably disposed on the projection side of the transmission screen.

Therefore, according to the present invention, focusing becomes easy and the transmission screen can be protected.

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment will be explained with reference to FIGS. 1 to 6.

The telecine adapter of this embodiment includes a case 1 in the shape of a rectangular parallelepiped, as shown in FIGS. 1-3.

Four rubber legs 2 are provided on the bottom surface of the case 1, and the case 1 is configured to be placed on a horizontal table or the like.

Further, a circular opening 3 is formed on the front surface of the case 1, and a sleeve 5 equipped with a close-up lens 4 is attached to this opening 3.

Further, a fixed mirror 6 is arranged inside the case 1 of this telecine adapter.

As shown in FIG. 3, this mirror 6 is fixed to a mirror support plate 7, and the mirror support plate 7 has a bending piece 8 integrally connected to its upper end.

This bent piece 8 and a chassis 9 fixedly disposed within the case 1 are connected by screws, whereby the mirror 6 is fixed to the chassis 9.

Furthermore, inside this case 1 is a pair of rotating mirrors 11. 1
2 are arranged.

As shown in FIGS. 2 and 3, these mirrors 11 and 12 are attached to and held on the inner surface of a frame 10 having a V-shaped cross section.
12 are attached at an angle of 45° to each other.

A bearing 13 is fixed to the lower surface of the frame 10, and this bearing 13 is attached to a fulcrum shaft 1 fixed to the lower part of the case 1.
It is mated with 4.

Further, a rotating shaft 15 is crimped and fixed to the upper part of the frame 10, and this rotating shaft 15 is fitted into a bearing 16 fixed to the chassis 9.

As a result, the frame 10 is rotatably supported around the axes of the fulcrum shaft 14 and the rotating shaft 15.

The rotating shaft 15 passes through a circular opening 17 formed on the upper surface of the case 1 and projects upwardly.

A knob 18 is fitted onto the rotating shaft 15, and is fixed to the rotating shaft 15 with screws 19.

Therefore, by turning this knob 18, frame 1
0 rotates, and mirror 11. 12 will also rotate.

A flange 20 is integrally connected to the lower end of the knob 18.

The outer peripheral edge of the flange 20 is in contact with a packing 21 fixed to the inner edge of the opening 17, thereby preventing dust from entering the case 1 through the opening 17.

Furthermore, a decorative ring 22 is fixed to the outer edge of the opening 17.

Further, a pin 23 is fixed to the upper part of the frame 10, and this pin 23 is fitted into an arc-shaped elongated hole 24 formed in the chassis 9.

The frame 10 and the mirror 11 attached to the frame 10 are connected to the pin 23 and the elongated hole 24.
12 rotational positions are regulated.

Next, regarding the supporting device for the caption of this telecine adapter, as shown in FIG. Sliding groove 27 on the surface,
28 is shaped.

These grooves 27 and 28 allow the slide plate 29 to
is slidably supported.

A long hole 30 is formed in the slide plate 29 in its length direction (see FIG. 6), and a pin 31 fixed to the lower surface of the case 1 is fitted into the long hole 30.

This restricts the sliding stroke of the slide plate 29.

Note that by removing the pin 31 that fits into the elongated hole 30, the slide plate 29 can be removed from the rails 25, 26.

By removing the slide plate 29 in this manner, it becomes possible to place objects other than the telop card (magazines, etc.) in a position corresponding to the telop plate 33, which will be described later.

Further, as shown in FIG. 3, a bent piece 32 bent at right angles is integrally provided at the tip of the slide plate 29. As shown in FIG.

A caption board 33 is fixed to this bent piece 32.

A handle 34 is fixed to the outer surface of the telop board 33, and when the handle 34 is grasped, the slide board 29
is slid to pull out the telop board 33.

In addition, on the inner surface of the telop board 33, there is a telop suppressor 35.
is installed.

A rectangular opening 36 is formed in the case 1 opposite to the telop plate 33.

A decorative frame 37 made of plastic is attached to the peripheral edge of the opening 36, and a transparent glass 38 is attached to the opening of the decorative frame 37.

The opening 36 to which this glass 38 is attached is
By sliding the slide plate 29 and storing the telop board 33, the screen is closed by the telop board 33.

That is, the telop plate 33 also serves as a protector for the glass 38.

Next, regarding the screen 39 provided on the back side of the case 1 of this telecine adapter, as shown in FIG. 5, this screen 39 is made of rectangular frosted glass or plastic and has a transparent shape. This screen 39 is held by a frame 41 attached to the periphery of a rectangular opening 40 formed on the back side of the case 1.

Further, this frame 41 has a groove 42 formed on the outside of the screen 39, and this groove 42 allows an opaque protector plate 43 which has a higher reflectance than the thin synthetic resin screen 39 and has an appropriate reflectance. is configured to be removably attached.

The protector plate 43 also serves as an auxiliary screen for focusing the projector when projecting an image onto the screen 39.

That is, the frosted glass or plastic surrounding the screen 39 has a low reflectance in order to reduce loss of light, and the projected image becomes relatively dark when viewed from the projector side.

On the other hand, since the protector plate 43 is opaque and has a higher reflectance than the screen 39, the image is bright and very easy to focus.

Thus, the protector plate 43 protects the surface of the screen 39 when not in use.

That is, if the screen 39 is made of frosted glass, it will not be easily scratched, but if it is made of plastic, it will be more effective in preventing scratches.

Next, the operation of this telecine adapter with the above structure will be explained.

This telecine adapter forms an image on the screen 39 using light from a projector 44 placed opposite the screen 39 as shown in FIG. 6, and also places a subtitle 45 on the subtitle board 33. The knob 18 rotates the mirrors 11 and 12, thereby selectively guiding the image on the screen 39 and the light from the telop 45 through the lens 4 to the television camera 46, which is an example of an imaging device, and thereby transmitting the image on the projector 44. While editing the video, the video is recorded on a VTR connected to the camera 46.

This operation will be described in detail below. First, use the handle 34 to move the slide plate 29 into the grooves 27, 28 of the rails 25, 26.
, and then pull out the slide plate 29 along the sixth hole 30 of the slide plate 29.
It is moved to a position where the right end contacts the pin 31 in the figure.

Next, a telop 45 such as a card or photograph with text written on it is attached to the telop board 33 by a telop holder 35.

The image light from this telop 45 enters the case 1 through a transparent glass 38 attached to an opening 36 of the case 1, and enters the rotating mirror 12 shown by a solid line in FIG.
, and further reflected by rotating mirror 11 .

In this way, the course of the image light is changed by 90° and is guided to the camera 46 through the close-up lens 4.

In this way, the telop 45 is imaged by the television camera 46.

Next, Skorn 39 was projected by the Prosecuta play.
If you want to shoot the above image with camera 46, turn knob 18.
to rotate the frame 10 counterclockwise in FIG. 6 around the rotating shaft 15 and the support shaft 14, and move it to a position where the pin 23 contacts the left end of the long hole 24 of the chassis 9 in FIG. 6. .

The mirror 1 attached to the frame 10 by this
1 and 12 move to the positions indicated by the imaginary lines in FIG.

Also, before removing the protector plate 43 of the screen 39,
The light from the projector 44 is projected onto this protector plate 43, and the projector 44 is thereby properly focused.

When the focus is correct, the protector plate 43 is removed and the light from the projector 44 is projected onto the screen 39.

Note that the difference in position between the screen 39 and the protector plate 43, which also serves as an auxiliary screen, is within the depth of focus of the projector and does not pose a practical problem.

The transmitted image of the screen 39 is first reflected by the fixed mirror 6, and then reflected by the rotating mirror 11 and the rotating mirror 12.
and is guided to the television camera 46 through the close-up lens 4.

In this way, the projected image of the projector play is also captured by the television camera 46.

In this way, according to this telecine adapter, knob 1
Operate 8 to mirror 11. By rotating the telop 12, it becomes possible to alternately and selectively guide the image of the telop 45 and the image of the projector 44 to the television camera 46, making it very easy to edit the videotape.

Next, a second embodiment of the present invention will be described with reference to FIG.

Note that parts corresponding to those in the first embodiment are designated by the same reference numerals, and their explanation will be omitted.

In this embodiment, two fixed mirrors 50. 51 and one rotating mirror 52 are arranged.

That is, as shown in FIG. 7, a fixed mirror 50. 51 are fixedly arranged so that they form an angle of 45 degrees to each other, and a rotating mirror 52 is arranged at a position facing the screen 39.

The mirror 52 is rotatably supported at one end by a support shaft 53 and is configured to be rotated by a knob 54 .

Therefore, when guiding the light from the projector projected onto the screen 39 to the television camera, the rotating mirror 52
is rotated to the position shown by the solid line in FIG.

Further, when the light from the telop on the telop board 33 is to be guided to the television camera, the rotary mirror 52 may be rotated as shown by the chain line in FIG.

Note that this rotating mirror 52 may be replaced with a sliding mirror.

In other words, the mirror 52 reflects the light from the screen 39 and is arranged to be moved linearly between a position where it blocks the light from the telop and a position where it does not block the light from the telop. It's okay.

Next, a third embodiment of the present invention will be described with reference to FIG.

In this embodiment as well, parts corresponding to those in the first embodiment are designated by the same reference numerals, and their explanation will be omitted.

In this embodiment, one rotating mirror 60 is provided inside the case 1 to constitute a telecine adapter.

That is, a rotating mirror 6 is placed at a position facing the screen 39.
0, and is rotatably supported by a support shaft 61.

This mirror 60 is supported by a support shaft 6 by a coil spring 62.
A stopper pin 63 is provided so that the mirror 60 is biased to rotate clockwise in FIG.

Further, the mirror 60 is rotated by movement of the slide plate 29.

That is, the mirror 60 is provided with a pin 64 at its lower end, and this pin 64 is in contact with a cam 65 of the slide plate 29.

This cam 65 is shaped by an inclined cut.

Therefore, as shown by the solid line in FIG.
When the nine-force bow 1 is not extended, the mirror 60 is rotated by the coil spring 62 and moved to a position where it comes into contact with the stopper pin 63.

For this reason, the image light from the screen 39 is transferred to this mirror 6.
0 and enters the television camera through the close-up lens.

Next, when the telop plate 33 of this adapter is pulled out as shown by the imaginary line in FIG. 8, the cam 65 of the slide plate 29
presses pin 64.

As a result, the mirror 60 is moved to the eighth position against the coil spring 62.
In the figure, it rotates counterclockwise around a support shaft 61.

That is, the mirror 60 is rotated to a position parallel to the screen 39.

Therefore, the image light from the telop on the telop board 33 is directly guided to the camera through the lens 4.

In this manner, according to the present embodiment, since the drawer of the terror plate 33 and the rotation of the mirror 60 are linked, there is no need to manually rotate the mirror 60, which is very convenient.

In addition, the number of mirrors is reduced to one, and the adapter can be constructed at a very low cost.

As described above, the present invention uses a projected image formed on a transmissive screen as an image source, and also includes an opaque auxiliary screen on the projection side of the transmissive screen, which has a higher reflectance than the transmissive screen. It is arranged in a removable manner.

Therefore, according to the present invention, it is possible to perform focusing using the image projected on the opaque auxiliary screen, which has a higher reflectance than the transmissive screen. Focusing can be performed using a projected image that is brighter than the image projected on the screen, making it very easy to focus the projected image.

Furthermore, according to the present invention, when this device is not in use,
An auxiliary screen can be placed over the front of the transmissive screen, which protects the transmissive screen and
It is possible to protect it from damage.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a perspective view of a telecine adapter according to the first embodiment of the present invention, and FIG.
The figure is a cross-sectional view of the same, and Figure 3 shows ■I to III in Figure 2.
4 is a sectional view taken along the line IV to IV in FIG. 2, FIG. 5 is a sectional view taken along the line V to V in FIG. 2, and FIG. 6 is a plan view of main parts showing the operation of this adapter. It is. FIG. 7 is a plan view of main parts of a telecine adapter according to a second embodiment of the present invention, and FIG. 8 is a plan view of main parts of a telecine adapter according to a third embodiment of the present invention. In addition, in the symbols used in the drawings, 39...Screen, 42...Groove, 43...Protector plate, 44...Projector, 46...
...There's a TV camera.

Claims (1)

[Scope of utility model registration request] In a video conversion adapter device that guides video light from a video source to an imaging device, a projection video formed on a transmissive screen is used as the video source, and a transmissive screen is provided on the projection side of the transmissive screen. A video conversion adapter device characterized by a detachable opaque auxiliary screen having a higher reflectance than the screen.