JPS5947883A - Shutter for magnetic disc still picture recording camera - Google Patents

Abstract

PURPOSE:To eliminate the shutter set process at each pickup, to make the shutter sound quiet and to attain ease of high speed continuous pickup, by using a rotary shutter using a torque of amagnetic disc. CONSTITUTION:A rotary shutter blade 10 where a cylindrical rotary shaft 10a is linked to a drive source of the magnetic disc has a notch opening 10b-1 and a long groove 10a-1 through which a pin 11 is slided is formed to the rotary shaft 10a. A rotary shutter blade 12 has a rotary shaft 12a and an opening 12b-1, a cam groove 12a-1 through which the pin 11 is slided is formed on and supported with the rotary shaft 12a, then the degree of overlap between the openings 10b-1 and 12b-1 is changed by shifting axially the pin 11 and the opening angle of photograph opening window is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a UE 7i which records the field image of an image sensor on a magnetic disk. ) Regarding the evening equipment, especially the Hi
It has a rotary blade that rotates by sharing power, and by controlling the opening angle of the blade according to the field light, it is possible to apply an appropriate amount of 1χ light to the image sensor. , will be explained below with reference to the drawings.

In the figure, FIG. 1 is a schematic diagram showing the configuration of a camera used in the present invention, in which light rays 1 from the object field pass through a photographic lens 3 having an aperture 2 in the middle, and a portion of the light rays pass through a beam splitter 4. It is reflected by the lens and formed into an image by the focus plate 5, and this image can be viewed directly through the pentagonal roof prism 6 and the eyepiece lens 7, and is also incident on the photodetector PDIK arranged for photometry at the same time. The remaining beam passes through the beam splitter 4, and the opening angle of the focal plane is varied according to the field light through the focal plane rotation shack 8, thereby providing appropriate exposure to the image sensor 9 using an aperture-priority method. K is telling me to give.

Here, the specific structure of the rotary shutter is shown in FIG. 3, and will be explained with reference to FIGS. 4 to 8, which are its constituent parts. The cylindrical rotating shaft 10a is connected to the source, and the first rotating shaft scissetter blade rotates at the same rotation speed as the magnetic disk, for example, and as shown in FIG. 10b-1, and the cylindrical rotation 1111 ]
Oa has a sliding long surface 10 of the pin 11 shown in FIG.
a to 1 are formed. , 12 is the rotation 'l'll
l I Oa It' (rotating shaft 12 to be inserted I'l
vS2 rotating sintering blade with a, the blade part 12b has an opening]2
-1 is formed, ? A1A1 rotational axis of the rotary shirt root 10] In the IJζ state, the movement of the pin 11 in the axial direction changes the overlapping condition of the openings +ob-+ and 12b-J, which changes the opening for photographing. The opening angle of the corner window changes.

Reference numeral 13 denotes a moving element that constitutes a part of a linear motor, which has a hollow coil 13a serving as a power source at the lower part, and a pair of rings 131+, l: C at the upper part. Pin 11 is located between them,
In addition, a plan 3d is attached for position detection and is adapted to slide on a potentiometer 141-.

15 is a field device for a linear motor, which is inserted into the hole of the coil 13a;
A permanent magnet 15b magnetized in the vertical direction is attached,
By passing a current between the terminals a and b of the coil] 311, the movable element 13 moves on the axis 1.5a.

Reference numeral I6 is a photo inkler (see Fig. 2), so that the light emitted from the light emitting element L E D J passes through the space 17 and reaches the light receiving element P1)2, and the light ray is blocked by the space 17. When this happens, the output of the light receiving element PD2 is switched from "I(" to r L J. 18 indicates the image frame to be photographed.

In such a configuration, field light passes through the photographic lens 3 and the diaphragm 2, is reflected by the beam splitter 4, and is transmitted to the light receiving element PDI installed at the eyepiece of the penta-roof prism 6.
When the light is incident on the light receiving element PDI, the output of the light receiving element PDI generates a voltage corresponding to the shutter speed that provides proper exposure for the current aperture value. This generated output is amplified by an amplifier 19 and inputted to one terminal of a servo amplifier 20 as shown in FIG. These two inputs will be compared.

On the other hand, the output of the servo amplifier 20 is connected to the coil i3a of the linear motor 13 via the analog switch 21, so when the Φforcer 13 moves, the Meter 14, U/13d also moved, and eventually the output of amplifier I9 and power supply VK
It is controlled so that the given distances between c and d are equal.

As a result, the position of the plan 13d of the potentiometer 14 is determined, and therefore the position of the pin 11 included in the pair of rings 13b, 13c of the actuator 111' is also determined. The opening angle of the rotation/yanta 8 that provides the appropriate exposure: 11° corresponding to the current aperture value is determined.

From this K, the exposure j11 is set to J for the image sensor 9, and in one exposure, the first magnetic disk (not shown) rotates by 1 and rotates l/- at the same time in the same rotation. 11 to the track of
After being recorded and cleared by the signals described below, the second exposure records a second track, thus creating a continuous image record, one after the other, whenever a temporary storage device is required. It can be performed.

Further, in the present invention, in order to prevent uneven exposure, a photointerrupter 16 is arranged, and care is taken to prevent the opening angle from changing during exposure. That is, just before exposure, the space 17 of the photointerrupter 16 switches from blocking light to transmitting light, so the output of the light receiving element P D 2 becomes level "I(", but it is inverted by the inverter 22 and becomes "L", The analog switch 21 is turned off, and no current flows through the coil 13a of the movable element I3, so that the opening angle of the rotary shutter 8 is fixed just before exposure.

When the exposure ends and the light is cut off, the output of the photointerrupter 16 becomes rHJ, so the information in the image sensor 9 is cleared by the "L" signal inverted by the inverter 22.

In addition, in the above explanation, the number of rotations of the rotating vines 8 is assumed to be the same as the number of rotations of the magnetic disk, but if the number of rotations of the rotating vines is selected to be an integral multiple of the number of rotations of the magnetic disk, the magnetic disk It is also possible to store photographs of an integral number of plates in one track of
It is also possible to provide an integer number of aperture windows for photographing, and set the number of rotations at the seven rotational centers to - an integer of the number of rotations of the magnetic disk.

In this way, the present invention uses a rotating no-no-ta that utilizes the driving force of a magnetic ◇ (disc).Therefore, there is no need for the 7-senotasenoto process of 4U of photography, and there is no need for the 7-senotasenoto process of 4U of photography, and there is no \/tsuta sound. At the same time, the rotating speed of the magnetic disk and the number of exposures by the rotary shutter are synchronized with each other, making it easy to perform high-speed continuous shooting, and it is also possible to maintain a constant aperture of 61 degrees during shooting. Therefore, it has the advantage that extremely good images can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing the configuration of a camera used in the present invention, Fig. 2 is a control circuit diagram of a rotating no. A perspective view of the main parts of the shutter, A [Figures 4 to 8 are perspective explanatory views, partially cut away at ir+i, showing the constituent parts of the rotary shutter. l...Field light, 2...Aperture, 3...Photographing lens, 4...Beam splitter, 5...5. t, ),
1. +, 4h, s・″ rotation/setter, 9...imaging element, 10...first rotating ivy blade, ]1...pin, 12-second rotating ivy blade, 13...mover ,
13a...Hollow coil, 13d"...Brush, 14...Poten/-I Me/Yu, 15...
Field device, +5d...permanent? l'B stone, 16. Photo interrupter, 17/=. Space, 18... Image frame, one... Amplifier, 20... Servo up, 21... Analog switch, 22... Inverter, PDI , pH2
··Light receiving element. Patent Applicant's Ceremony Meeting Month Co Pal 455 Figure f1 m2 Hit 2 "γ) 531 Total 1! 51st Two Trend 6 Figure 8 Reciprocal Procedure Sleeve 11 Yokichi (Method) Showa 15 Fui 4-December 4τ Japan 9th Governor R1 Office Director Wakasugi, llll Person 1 Case Indication 1157 Showa Patent Application No. 1578+i9shi12 Name of Invention Magnetic Disk Methyl Image Recording Canola Shack Device 3 Person Making Amendment Patent Applicant Address 174 Tokyo Metropolitan Government Itabashi-ku Shiri 2-16-20 phone (9(
i5) ] III (+22) Representative Director of Copal Co., Ltd. Ei T. Temporary 6. ・4 Target of amendment order November 1980: U011 5 Full text of the specification to be amended 6 Self-answered details of the amendment Pure 1 (no change to the inner world) 457-

Claims (2)

[Claims] (1) The field light 1 that has passed through the I-shaped shadow lens 3 and the diaphragm 2 is applied to the 11υ image element 9 to form a field image, which is then recorded on a magnetic disk (magnetic disk still image recording). In the camera, a light-receiving element PDI for photometry is placed at a position where it receives the field light 1 that has passed through the aperture 2, and information on the shutter speed that provides the appropriate exposure amount is obtained. It is placed in a position where it can control the large amount of field light that enters the image, and controls the opening angle of the rotary sensor 8, which is connected to the drive source of the magnetic disk and rotates in synchronization with the rotation speed of the magnetic disk, and directs it to the image sensor 9. A magnetic disc still image recording camera device characterized in that it provides an appropriate amount of exposure. (2) The field light l that has passed through the photographing lens 3 and the aperture 2 is applied to the image sensor 9 to form a field image, which is recorded on a magnetic disk (IR magnetic disk still image recording camera). Then, place the photometering light receiver 5 Jinko PDI at the position where it receives the field light 1 that has passed through the light 2, and obtain the +h information of the appropriate exposure amount. , Based on this information, it is arranged in a focal plane format just before the imaging 74 and triplet 9, and is connected to the drive source of the magnetic disk, (
The opening angle of the rotating/yanota 8, which rotates in synchronization with the number of rotations of the 1'θ air disk, is controlled during non-exposure, and is not controlled during exposure so that the opening angle does not fluctuate. The key point is to give an appropriate amount of exposure to the image sensor 9.