JPS60130273A - Mount adapter with shutter for tv camera - Google Patents

Abstract

PURPOSE:To obtain still pictures or slow reproduced pictures of less blur and high quality even if an object moving in a high speed is photographed, by opening and closing a shutter incorporated in an adapter body on a basis of a vertical synchronizing signal taken out from the output of a TV camera. CONSTITUTION:The output signal from the TV camera is led to a VTR or the like through a cable 13; and a branching device 14 is provided on the way of the cable 13 to branch the video signal. The branched video signal is applied to a synchronizing signal separating circuit 15, and the vertical synchronizing signal is extracted by this circuit 15 and is supplied to a shutter driving circuit 17. The shutter driving circuit 17 opens and closes the shutter provided in an adapter body 16 synchronously with the vertical synchronizing signal. This shutter opening and closing is performed in a vertical blanking period or a period approximating it, thereby obtaining stable pictures of less blur even in case of photographing of the object moving in a high speed.

Description

[Detailed description of the invention]

The present invention relates to a mount adapter with a shutter used for a TV camera with interchangeable lenses. [Spine Cutting Technique] The TV screen is scanned in the vertical direction at a field frequency of 60117. Therefore, even in a TV camera, the image accumulated charge information that is pulled onto the image storage surface is
The data is scanned and read out once every 60 seconds, and converted into a video signal. This is the same for both image pickup tube and image pickup plate cameras. In other words,

[Each point is one point after the image storage charge is read out until the next readout.
A charge is accumulated (actually discharged) for 60 seconds. Therefore, one field of a TV screen corresponds to a methyl photo taken at a shutter speed of 1/60 seconds. By the way, many of the recent home VTRs display still images and slow play (1) on the right side, but there are two types of playback methods: the tearene/regyu plastic method and the field playback method. In the case of this method, odd and even fields are played back alternately, so if a moving object is in the shadow, the playback will be blurry, which is extremely difficult to do. How to use: With the field playback platform, only one of the odd fields and even fields is affected by Dr. 31, so it is safe to avoid severe blurring. Since it is a sprue photograph, etc. 11I, if a high-speed moving object is shadowed, it will still be blurred. After all, in the case of dynamic subjects such as sports↑q, high-quality still images
(- image or n-1 + 1 cow is often difficult to do. It is convenient to be able to use the methyl cameras supplied by camera manufacturers as they are. In the case of =, ] ■ The camera itself is capable of changing lenses, and the replacement mounts for the eyes and lenses need to match, but TV cameras are generally not supplied by electronic manufacturers. Therefore, it is difficult to find an interchangeable lens with a mount that is compatible with [\/) J Mela's 7un1-.Such a situation makes it unnecessary for TV camera users to
1 is forced. [Objective of the Invention 1 The present invention has been made in view of this point J:
A lens that includes a shutter that opens for 0 hours in synchronization with the vertical synchronization signal during recording. Mount 1--adapter is provided for J8L purposes. The second object of the present invention is camera main and V i-R.
The purpose of the present invention is to achieve the object stated in "-1-" without making any changes to the device itself.The third object of the present invention is to improve the variety of interchangeable lenses for methyl cameras that are currently being supplied. SUMMARY OF THE INVENTION In order to accomplish these objects, the present invention provides a mount adapter that allows one lens to be used in an interchangeable TV camera. Insert the ivy into the adapter body, which is installed between the TV camera's wood hole and the lens. Incorporated!・Place the ivy vertically! We propose opening and closing in synchronization with the 111 signal. , 1. In another embodiment of the present invention, the shutter opening time is controlled according to the magnitude of the video signal,
to achieve automatic control of the exposure section. In yet another embodiment of the invention, a diaphragm is installed inside the adapter body to prevent the shutter mounted on the adapter body from opening and closing in synchronization with the vertical synchronization signal of the video signal. The aperture is controlled according to the size of the blade! , the automatic control of the exposure fli is carried out in advance of the shutter. 1 Explanation of 11 examples 1 The concept 46S composition of the mount 1 to adapter according to the present invention is shown in FIG. , 13 is a Kelpuru connected to a VTR or the like. Reference numeral 14 denotes a branching device that is attached between the connecting cable 13 and the connecting portion of the VTR, etc., and branches the video signal. The synchronization circuit 15 receives the video signal output from the branch 14 and extracts a vertical synchronization signal. This vertical synchronization signal is supplied to the shutter drive circuit 17. 1G is an adapter body that has a shutter inside, and the shutter opens and closes at On the camera side, there is a mount 1~ that fits the lens attachment mount 1- of the TV camera body 12 to be used, and on the lens side of the adapter body 16, a mount 1~ that fits the mount l- of the lens to be used is provided. For convenience of explanation, the branch 14 and the synchronous part 1i111 are provided.
Although the circuit 15, the shutter drive circuit 171, the mount 1 to the main body 16 are illustrated as if they are separate parts, from the viewpoint of portability, these or other parts can be incorporated into the swallowtail main body 16. 1) Of course it's a good thing. The timing when the shutter is 17i10 is from direct synchronization to I
No. 7: t 411 or +-1' (2r and 4i must maintain a certain relationship with Ilr. Also, the shutter opens between vertical bunong 1 and IUi, or vertically It cannot be close to the blanking period. Otherwise, the 1-5/-j inconvenience will occur, as shown in Figure 2. Figure 2 (,1, of the screen) 11" + 1st speed Shit Tsuku CIII to catch a moving object traveling at high speed from the side.
; Although it is a shadow, 1i7ii'7 of screen △ is
When the beam is reading and scanning, the opening and closing of the
-f', as shown, △(f/blasphemy)
1) Put away moving objects. This is the -1- side (mashi'(in seconds ago) of the old information, and the lower side is the new information,
This is because η1・knocked out i〕(;)) put out・. Therefore, is the opening/closing of the 11i direct blanking period or this? j 4') is (2 or 41) The present invention (uses shutter and 1) ink, known shutter, e.g. 1-Do 11\P (Do you want to use 1 lamic light 1 notch? Choosing ``A'' and ``Y'' as questions is within the range of +-1, so even if you take a picture of a high-speed moving object, you can still or slow it down if you play it back using the frame playback method. A high-quality raw screen with no blur can be obtained even during playback.In the example shown in Fig. 1, if an interchangeable lens for an IN reflex/still camera is used as a lens, the aperture included in the lens Since the device has to be set manually, it is difficult to set the appropriate exposure.To solve this problem, Figs. Mount 1~・Indicates the configuration of the adapter. 3rd
In Figures 1 and 4, the same components as in Figure 1 have been labeled with the same numbers. Figure 3 shows the height of the drop [1] depending on the size of the video signal
It is intended to control the time and achieve proper exposure. [11] Also, the DC conversion circuit j8 that converts the video signal into DC, and the same 1 for the vertical (vertical) iUI signal.
υ] L, "C 1111 The width of the pulse generated by the dividing circuit 15 is varied by the output of the ilJ flow circuit 18;
-4I! J-! A modulation circuit 19 and the like are added, and the output of one of the modulation circuits is applied to the shutter X/vine drive circuit 17 to control the sit time. The output pulse width of the modulation circuit 19 corresponds to the size and brightness of the video signal, so no matter what the aperture value of the lens 11 is or what the brightness of the subject is, an appropriate shutter can be used. 1
1 interval is automatically determined. A3, in order to freely control the shutter time,
Pl,, 7 Do you use ceramic shutters in Tsuta Doji? Jl, yes. In FIG. 4, an automatic aperture device is provided in the adapter section 16 to enable automatic exposure. This is because depending on the subject, you may want to keep the shutter speed constant and dance, so the automatic exposure can be increased by 11 in this case as well. V camera (,
In order to drive this electromagnetic drive system, in addition to the (14 output) shown in Figure 1, the video signal of the turnout 14 is smoothed and converted to DC (J DC conversion circuit 18
, and the output of the DC converting circuit 18 to Jet ill air F
A comparison circuit 20 is set up ('Jru.r:+M The signal is maintained at a constant level. ``Effects of the Invention'' Since the present invention has the above-mentioned configuration, it can be used without any changes to the camera body if it is a TV camera with interchangeable lenses. If you combine it with a VTR that supports frame playback (still image or slow playback), you can perform high-quality still image playback or slow playback. ) The sensitivity and resolution of the prefectural image tube have significantly improved, and when combined with a camera that uses these high-performance imaging elements, the high speed of the Shi11 Ivy can be selected, resulting in even more impressive image quality.The present invention is IM' Since it uses an adapter configuration that converts the mount, the lens can be small and can be used with any super telephoto lens or small wide-angle lens. However, it is also economical.Also, there has been a trend of silver shortage in recent years, and on the other hand, the development of video color printers has been slow.Therefore, using this book and light, IIQ
If you image the image and make hard copies using a video color printer, you can economically print out any number of copies without using silver, and create Print 1, which replaces the conventional silver halide film and methyl photoprinting. In addition, we will be introducing still cameras up to now, as well as the most advanced so-called electronic still cameras (such as Still Color "A" and bllIP).
etc., the rF 111f and the I7 were
According to the present invention, the release operation must be performed continuously every 1i60 seconds. ′,
This J: Unana trouble 11
It also has the effect of being able to play the most terrifying song while playing it later. On d5, the tree was sent to Akira's Maun 1, and Ata'buta was attached to the camera. 11. If you leave the 1st cylinder open, the normal 1st
Te'no A Kamishidoji - (can be used until it -L)
4 “No.

[Brief explanation of drawings]

! ;l+ 'l l'211 Maun 1 according to the present invention
- Schematic configuration diagram of recording system 13 including adapter, 2nd
The figure is an explanatory diagram of the screen when the timing of opening the shutters and ivy [) is bad, and FIG. /11! FIG. 4, a 4i4 diagram of example i, is a block diagram of a third embodiment in which an automatic diaphragm device m is incorporated into the main body of the tab button to provide an automatic exposure method. 11... Lens 12... TV J Mela body 13
... Code 14 ... - Turnout 15 ... Synchronous valve port circuit 16 ... Adapter body 17 ... Shutter drive circuit 18 ... DC conversion circuit 19 ... Modulation circuit 2O
... Comparison circuit #, 11 FAT applicant Asahi Optical Industry Co., Ltd. (Representative patent attorney Yoshi 4.4 Gopai L ~, 4.

Claims (1)

[Scope of Claims] (1) An adapter body that is installed between the main body and the lens of an interchangeable lens ', r -1' V camera, a shutter built into the adapter body, and a Image 1 from output. -5'j 'L branching circuit, branched video 191a,; A shirt tie for a TV camera consisting of a shutter drive device for opening and closing the shutter, etc. to the mount 1 - horn / I / ° lx. (2) 1r-it 101 14. It is noted that the dividing stage circuit and the shifter drive device are incorporated into the main body of the converter. '1 Shirt tie 4-mount I~・i' adapter for the -1-V camera described in Ji'I. (, 'l) Ding V camera with interchangeable lenses The adapter body that connects the main body and the lens, the shutter that is inserted into the adapter body, the branch that branches the video from the output of the TV camera, and the branched video. Sync separation circuit that separates the vertical sync signal from the signal [
A control circuit that outputs a control signal > 3, and a shutter driving device that opens the shutter in synchronization with the shutter opening control signal and opens the shutter after the time period for which the shutter opening control signal 8 is parked has elapsed. Features: [Shirt tie for V camera] mount adapter. (4) The control circuit smoothes the video signal to form a DC voltage, and the vertical synchronization signal from the Domei Bunkei 1 circuit to J:Risk-1, and the said type d. ) A shutter control circuit which forms a shutter aperture control signal whose time depends on the output voltage of the circuit and which terminates once again. (5) A patent characterized in that the synchronous branch circuit, the control circuit, and the shutter drive device are incorporated into the adapter body. A mount I adapter with a shutter for a TV camera according to claim (3) or (4). (6) An adapter body to be attached between a TV camera body with an interchangeable lens and a lens; , a shutter with silk inside the adapter body, a diaphragm with silk inside the adapter body,
A brancher that branches the video signal from the output of the TV camera, a synchronization separation circuit that separates the vertical synchronization signal from the branched video signal, and a shutter drive that opens and closes the shutter in synchronization with the separated vertical synchronization signal. The device 6 and the aperture control device that adjusts the aperture according to the magnitude of the video signal are 1! ``Shirt tie for V camera'' Mount 1~ adapter. (C1) The aperture control device described in item 11 is equipped with a smoothing circuit for smoothing the video signal to reduce the current Ichikawa voltage to 1!76, and a comparison circuit that compares the free current voltage from the smoothing circuit with a predetermined voltage 0, and the comparison circuit 7. The shirt tie mount adapter for a TV camera according to claim 6, wherein the aperture is controlled by an output of a circuit. (8) The synchronous valve head circuit, the shutter drive device, and the diaphragm control device are incorporated into the adapter body, as set forth in claim (6) or (7). Mount adapter with shutter for TV camera.