JPH03216632A - Multiple photographing device - Google Patents

Abstract

PURPOSE:To obtain a sharp object image without receiving the effect of external light by closing a shutter or preventing charges from being accumulated for a while during the time when a stroboscope does not emit light till next light emission. CONSTITUTION:By depressing a release button 2, a CPU 4 allows a lens shutter 1(electronic camera/CCD) to open and fetches range-finding information from a range-finding sensor 7 and photometry information from a photometry sensor 6 to drive an AF actuator 8 and a stop mechanism 5 respectively. When the lens shutter is opend, the CPU 4 transmits the command of light emission to the stroboscope 3 so as to execute the flash light emission, then it allows the lens shutter 1 to close. The above action is executed specified times, and multiple photographing is completed. Since the lens shutter 1 is opened just before the light emission of the stroboscope and it is closed immediately after completing the light emission of the stroboscope, the distinct object image is obtained without receiving the effect of the external light.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multiplex photographing device, and more particularly to a multiplex photographing device that has excellent characteristics when performing consecutive multiple exposures in a silver halide film camera or an electronic still camera.

[Prior technology] Silver halide film cameras and electronic still cameras. For example, multiple flashes are emitted from a strobe device built into a video camera or externally attached to a subject moving at high speed, and the reflected light from the subject is focused on the same screen of a film or image sensor. For example, a multiplex photographing device for imaging is disclosed in Japanese Patent Application Laid-Open No. 64-77377 and Japanese Patent Application Laid-open No. 59-1.
A large number of such methods have been provided, including Japanese Patent Application Laid-open No. 00670, Japanese Patent Application Laid-Open No. 1982-104279, and Japanese Utility Model Publication No. 12108-1983. This kind of multiplex photography will be briefly explained using a camera using silver halide film as an example.

FIG. 6 is a perspective view of the silver halide film camera, FIG. 7 is a cross-sectional view, and FIG. 8 is a timing chart thereof. In the figure, when the release button 21 is pressed, a shirt release signal 21g is sent out (see FIG. 8(A)), which causes the shutter 25 to open at time t1 (see FIG. 8(B)).
)reference). 8 (C) from the strobe light emitting unit 22.
) Strobe light emission 22a, 22b, 22c, 22d shown in
For example, when the light is directed toward an object (not shown) that is moving at high speed, the reflected light from the object becomes the 6th object.
An image is formed on the film surface 26 through the photographing lens 23, the aperture mechanism 24, and the shutter 25 in the open state shown in FIG.・・・・・・
. . , etc., the shutter 25 is turned off at time t2, and the winding signal is turned on (C) as shown in FIG. 8(D). : The film winding operation is performed.

[Problems to be Solved by the Invention] However, in the conventional multiplex imaging device, which is performed by irradiating a moving object with multiple flashes at intervals with the shutter open, external light is not ideal. Although it is preferable that there be no strobe light, darkness is impossible, and even a small amount of external light will be superimposed on the strobe light and reach the film surface. The relationship between the strobe light or external light irradiated onto the subject and the subject image formed on the film surface will be briefly described below with reference to a timing chart shown in FIG. That is, as shown in FIG. 9(A), it is assumed that a round object 11 as a subject is moving, and strobe lights 22a, 22b, 22c, and 22d shown in FIG. 9(B) are directed toward this object 11. If the irradiation is performed intermittently, external light 27 shown in FIG. 9(C) is unavoidable, so that as a result, the strobe+outer end shown in FIG. 9(D) is projected onto the subject 11. Therefore, the object images obtained on the film are clear object images 11, lla, . . . corresponding to the strobe lights 22a, 22b, . . . as shown in FIG. 9(A). This results in a belt-shaped subject movement image 27a that is photographed faintly due to the external light 27 during the pause period of strobe light emission.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a multiplex photographing device that can obtain sharp images of a subject without being affected by external light when multiplex photographing is performed by continuous multiple exposure using a strobe. be.

[Means for Solving the Problems] The multiplex photography device of the present invention is a multiplex photography device that performs multiple photography by continuous multiple exposure using a strobe, and the strobe does not emit light between one strobe light emission and the next flash emission. The shutter is closed or no charge is accumulated during at least part of the time when the shutter is not in use.

? Function: With this multiplex photography device, the shutter is closed for at least part of the time when the strobe is not firing, or the charge is not accumulated, so each individual A clear image of the subject can be obtained.

ε Implementation example The present invention will be explained below with reference to illustrated embodiments.

First, before explaining the embodiments of the present invention, the first,
The basic concept of the present invention will be explained with reference to FIG.

FIG. 1 is a timing chart of the multiplex imaging device of the present invention. In the figure, the camera release button is pressed,
When the release signal is turned on at time t1■, time t12
The shutter opens. Thereafter, at time t3, the strobe is turned on and one flash is emitted, the shutter is closed, and the shutter remains silent until time t13, immediately before the next flash is emitted. At time t13, just before the next flash is emitted, the shutter is opened again, the synchronized strobe light is emitted, and the shutter is closed. Multiple photography is attempted by performing such operations a predetermined number of times, and after the photography is completed, the film is wound and the photography of one frame is completed.

FIG. 2 schematically shows the relationship between the strobe light and external light irradiated onto the round object 11 when the object is moving, and the object image formed on the film surface by this. This is the timing chart shown in FIG. In the figure, when strobe light is emitted, strobe light 2 2 g, 2
2 b, 2 2 C * 22 d and external light 27 are irradiated onto the subject, resulting in a sharp subject image 11,
lla. 1 lb, llc is obtained. On the other hand, in most of the periods when the strobe light is not irradiated, as mentioned above,
Since the external light 27 is blocked by closing the shutter, nothing is captured. The above is the basic concept of the present invention.

Next, one embodiment of the present invention will be described with reference to FIGS. 3 and 4.

FIG. 3 is a block system diagram showing the configuration of a camera to which the multiplex imaging device according to the present invention is applied.

In the figure, when the release button 2 is pressed, the CPU 4 opens the lens shutter 1, acquires distance measurement information from the distance measurement sensor 7, controls the AF actuator 8, and acquires photometry information from the photometry sensor 6. The diaphragm mechanism 5 is then driven. When the lens shutter is opened, the CPU 4 sends a light emission command to the strobe 3 to cause it to emit flash light, and then closes the lens shutter 1. After performing the above operations a predetermined number of times, the multiplex photography is completed. Note that the setting display section 9 is
The number of flashes to be emitted, the interval between flashes, etc. are set and input to the CPU 4, and are also displayed on the monitor for the photographer.

The above is an overview of the configuration of a camera to which the present invention is applied. Conventionally, the lens shutter 1 was left open in response to a release operation, and strobe light was emitted a predetermined number of times during this time, but in the present invention, strobe light is emitted. Lens shutter 1 just before
Open the lens shutter 1 immediately after the strobe light has finished firing.
The closing operation is performed a predetermined number of times to perform multiple shooting.

The operation of this embodiment configured as described above will be explained with reference to the flowchart shown in FIG. In the figure, when this flow starts, first, the number of times of flashing and the interval of flashing are set, and then the process proceeds to step S1. In this step 51, the camera waits until the release button is pressed, and when the release button is pressed, the process advances to step S2 to perform AF and AE. Then, the shutter is opened in step S3, strobe light is emitted in step S4, and the shutter is closed in step S5. Step S
In step S6, it is determined whether or not the strobe light emission has been performed a set number of times, and if the set number of times has not been reached, the process advances to step S7. In this step S7, a timer that defines the flash emission interval is started, and when the timer time elapses, the step S7 is started.
Returning to step 3, the operations of steps 83 to S5 are repeated until the set number of times is reached. Then, when the set number of times is reached, the process ends.

The above is a case where the present invention is applied to a silver halide film camera, but the case where the present invention is applied to an electronic still camera, a video camera, etc. will be described below, returning to FIG. 1.

In FIG. 1, when a vertical overflow drain of a CCD used as an image pickup device in an electronic still camera, a video camera, etc. is turned on, the charges accumulated in the CCD are discharged to the outside. This state corresponds to the state in which the shutter of a silver halide film camera is closed. On the other hand, if the overflow drain is turned off, charges will be accumulated in the CCD. That is, turning off the overflow drain corresponds to opening the shutter in a silver halide film camera. Therefore, if the flash is synchronously emitted during this off period, the same effect as a silver halide film camera can be obtained. After the charges accumulated in the CCD are transferred from the CCD to the accumulation section by a charge transfer pulse, the overflow drain is turned on. By performing such operations a predetermined number of times, desired multiplex photography can be performed.

FIG. 5 is a photograph of a state in which a golf club is being swung using the multiple photographing device according to the present embodiment.

In such a case, with conventional multiplex photography devices, such a photograph could not be obtained unless the surroundings were dark, but according to this embodiment, the time between one strobe light emission and the next strobe light emission is Since most of the shutters are closed, desired multiplex photography can be performed without being affected by external light.

[Effects of the Invention] As described above, according to the present invention, when multiplexing a subject moving at high speed with strobe light, the time during which strobe light is not emitted between one strobe light emission and the next flash light is reduced. At least some of them have the remarkable effect of being able to take multiple shots of clear subject images without being affected by external light, since the shutter is closed in silver halide film cameras, and no charge is accumulated in electronic still cameras and video cameras. is demonstrated.

[Brief explanation of drawings]

1 and 2 are timing charts of a multiplex imaging device according to the present invention, FIG. 3 is a block system diagram showing the configuration of a camera to which a multiplex imaging device according to an embodiment of the present invention is applied, and FIG. 4 5 is a flowchart explaining the operation of this embodiment, FIG. 5 is an explanatory diagram showing multiple shots of a state in which a golf club is being swung according to this embodiment, and FIGS. 6 and 7 are perspective views of a silver halide film camera. FIG. 8.9 is a timing chart of camera operation in a conventional multiplex imaging device. 3... Strobe

Claims (1)

[Claims] (1) In a multiplex photographing device that performs multiple shots by continuous multiple exposure using a strobe, the shutter is closed for at least part of the time during which the strobe is not firing between one strobe flash and the next flash; Or a multiplex imaging device characterized by no charge accumulation.