JPS5838935A - Camera - Google Patents

Abstract

PURPOSE:To accumulate the image information for objects by photoelectric conversion and to display the same in a television image receiver via a video information recorder by providing an area type solid state image sensing element on the interchangeable cover of a camera interchangeably thereby disposing said element on the focal plane of a photographic lens. CONSTITUTION:A film is usually disposed on rail surfaces RP for setting the position of films, but in this figure a solid state image sensing element SM of an interchangeable video adapter is disposed on the focal plane, and is so constituted that electrical information is transmitted therefrom to the adapter of a camera video recorder CK1 through connecting terminals CT and CM. Since the camera is so constituted that when the image sensing element is mounted to the camera the time constant control of a time constant circuit for controlling the shutter is started upon full opening of the shutter, the image information of the correct exposure for objects is accumulated in the solid state image sensing element without slit exposure from a low speed second time up to a high speed second time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera that can be equipped with an exchangeable video adapter having an X-ray camera by, for example, replacing the backpack.

In recent years, homogeneous imaging devices such as ccom and M)SIL have come to be used in various fields.

Furthermore, large-area solid-state imaging devices using amorphous silicon or the like have also been proposed.

These solid-state image sensors can obtain image information corresponding to a subject by controlling the image information/O storage time.

On the other hand, when obtaining image information using photosensitive materials such as film, it is necessary to control the exposure amount with a shutter, and with normal shutter speeds, slit exposure is required. In particular, if this is used as is for an imaging means, the exposure accuracy will be significantly reduced.

The present invention aims to eliminate such drawbacks of the prior art, and it is possible to dispose a solid-state image element on the focal plane of a photographic lens by replaceably providing it on, for example, an exchangeable back cover of a camera. The image information corresponding to the subject is photoelectrically converted, stored, and magnetically recorded via a video information recording device, so that the magnetically recorded good image information can be displayed on, for example, a television receiver. - In addition, when an imaging means is installed, specific control of the shutter control time circuit is started after the shutter is fully opened, thereby providing a camera suitable for controlling a solid-state imaging device. be.

The present invention will be explained in detail below with reference to the drawings.

#! FIG. 1 is a block diagram of a fine point reflex camera to which the interchangeable video adapter of the present invention can be attached.

LS is an imaging lens, AS is a crest! D, QM is a quick return structure, FB is a focusing plate, cL is a condenser lens, PR is a pentaprism, EL is an eyepiece lens, S
P is photoelectric conversion element for photometry, MT is current needle for exposure display, S
T is the shutter, FP is the rail for setting the film position,
SM is the area m solid-state image sensor, DM is the drive circuit for the solid-state image sensor, AM is the replacement back cover, CM is the connection terminal on the replacement video adapter side, CBI, CB.
2 is a connection cape, CKI is a video recording device, and CK2 is a display device such as a television receiver.

Normally, a film is placed on the rail surface FP for setting the film position via a back cover having a film pressure plate (not shown), but in this figure, the image element SM (4) of the replacement video adapter is placed on the focal plane. The adapter is arranged such that electrical information between the camera 2 and the adapter is transmitted via the connection terminals CT and CM.

FIG. 2 is a diagram showing an embodiment of the electric circuit of a camera having the shutter control method of the present invention.

This figure assumes a shutter-priority single reflex camera, and is a light extraction circuit consisting of a photoelectric conversion element for light in the LMa column, spSim, an operational amplifier for light, MPI, and a logarithmic conversion element W, where Sv is film sensitivity information, This is an exposure information setting circuit for the TV to set shutter time information.

The outputs of LM, TV, and Sv are added by the operational amplifier OPI, and aperture information is output.The aperture value is displayed on the multi-display ammeter MT, and the magnetic ) Mgl sets the aperture.

By pressing the first step of the shutter release button (not shown), the narrow light power switch is turned on, power supply El is supplied to the photometry and display circuit system, and m output information is displayed. Next, the second step of the shutter release button jg is pressed. When pressed, the photographic power switch turns on, and power starts to be supplied to the aperture and shutter control circuits.

Shutter time setting means Resistor VRI for shutter time setting linked to TV, capacitor t01 for time integration. When the shutter starts to open, the count switch #t turns off at the same time and the Schmitt trigger circuit forms a special circuit for controlling the BHT shutter. ! Gnet Mgl
When the aperture O control is completed via the quick return 2nd QM, the shutter begins to open, the pan turns off, and specific control of the shutter control time circuit is started.
When the O potential exceeds a certain value, the Schmitt trigger circuit s
The HT is reversed, the shutter control magnet Mg2 is turned off, the shutter is closed, and normal film is used to complete the exposure. Next, the transistors Tri, T
r2゜4! [R1 to R3, a switch that turns on when the shutter is fully open, and turns off when the shutter closes and winds 9#i, etc.]
This circuit is a round circuit that controls the shutter control time setting circuit to switch the start timing of the zero setting control when the replacement video adapter of the present invention is installed.

Camera 2 and adapter; connect terminal CTI, CMI; c
When connected via 'rz, 0M2; c'ra, cm;, the transistor Tr2 is turned on by the pull-down resistor island on the adapter side, so the transistor Tri is also turned on, and both terminals of C- are opened and shorted. Therefore, even if the count switch pot is turned off in synchronization with the beginning of the shutter opening, C is not charged. When the timed control is started, the connection terminal CT3,
The solid-state image sensor drive circuit DM starts storing image information corresponding to the subject in the solid-state image sensor 8M via the CM3. When the C and O potentials exceed a certain value, the Schmitt trigger circuit is inverted, and the connection terminals CT2 and 0M2
Then, the shutter control magnet Mg2 is turned off, and the exposure to the solid-state image sensor SM is completed.

In addition, in the present invention, when using a replacement video adapter, the camera 2
Switching the sensitivity information of Confucian filter five to the sensitivity of the solid-state image sensor, that is, in Figure 2, you can easily replace the video adapter! ! When connected, a pull-down resistor is also connected via the connect terminals CTI and CMI.

The transistor Tr15 is turned on, so the transistor Tr16 is turned on, and the transistor Tr17 is turned off via the inverter IN.The sensitivity information vS of the solid-state image sensor is input to the operational amplifier OP1 instead of the film sensitivity information SVK, and the sensitivity of the solid-state image sensor is changed. A suitable aperture is set for 0 #! Figure 3 is a diagram showing another embodiment of the shutter control method in the camera of the present invention.After the camera power switch is turned on when the replacement video adapter is attached, the aperture is determined and the shutter is fully opened. This is a method in which the time of 0 is delayed in advance via a delay circuit, and the output of the delay circuit starts the time control of the shutter control time control circuit. In synchronization with turning on, a reset circuit is configured to initially reset the charge of the time-fixing conductor tC1 of the delay circuit. Island is a rounded resistor that controls the time constant current of the delay circuit.To! l) Only when a replacement video adapter is installed, transistor Tr5 is turned on, time-setting current flows, CPI is inverted, transistor Tr7 is turned on via resistor R fin, transistor Tri is turned off, and shutter control time-setting circuit is activated. When , constant control starts,
After a certain period of time, the Schmitt circuit SHT turns ffi L, the shutter closes, and the exposure to the solid-state image sensor ends.

Although this embodiment describes a shutter-priority type camera, the present invention can be similarly applied to a shutter control time-setting circuit of an aperture-priority type camera that controls the shutter speed based on a sidelight calculation value. Needless to say. Also, although the time-setting circuit for shutter control is illustrated as an analog example,
The same applies to digital time-fixed circuits using counters.

#I4 shows a specific example of the solid-state image sensing device SM suitable for the present invention. ..., Zn is a photosensitive pixel portion having a charge storage function, Cmu1. ...,
Cne,...;CZ, ,...,CZn#i (rounding integral clearing to clear the charge accumulated in the wrinkle photosensitive pixel area), FAI.

..., FAn ;...;FZI, ..., FZ
n is iii accumulated in the armpit photosensitive pixel area corresponding to the subject
H8 is the analog shift register for horizontal charge transfer, To9, and these O! Il direct and horizontal shift registers receive clock pulses Vφ3. ■φ,.

Hφ8. Driven by H~. The image information is transferred to the vertical shift register through the vertical shift register and the horizontal shift register in a known manner, and the image information transferred to the right end of the horizontal shift register is transferred to the field effect transistor, (PET)FCI, Fe2
, resistors R, .

When the shutter on the camera side is fully opened, the transistor Tri is turned on and the -transistor Tri is turned off, so that the specific control of the shutter control time circuit is started and the CT3 terminal is set to zero level. The ICG terminal, which was discharging the necessary charge, is reversed to the low level side,
Integral Clear Goo) CAI, ... CAn * -;
CZt * ... * CZn is turned off and photosensitive iii
Accumulation of image information corresponding to the subject is started in the search sections A, , . . . , ks ;-.-; When the time-setting control of the shutter control time-setting circuit is completed, the Schmitt trigger circuit SHT is inverted, the CT2 terminal becomes high level, a pulse is generated at the SH terminal via the drive circuit DM, and charge transfer (FAI) occurs.

..., FAn ;...; FZ, ..., F
Zn is turned on, the image information accumulated in the photosensitive pixel section is transferred to the analog shift register vsi, ... VSn, the accumulation of image information is completed, and the reading of image information is started. In this embodiment, the video Although an adapter is assumed, it is of course possible to include everything inside the camera.

As described above, when the present invention is used and an image sensor is attached to the camera 2, the time-setting control of the shutter control time-setting circuit is started after the shutter is fully opened, so the shutter is always fully opened and the slit exposure The solid-state image sensor can store image information with an appropriate exposure amount corresponding to the subject from low speed to high speed.

In addition, in the present invention, since the image information of the solid-state element is magnetically recorded via the video information recording device and the shutter is closed, good WIi image information with less dark signals caused by unnecessary light can be obtained. It has an excellent feature that allows you to arrange the

[Brief explanation of drawings]

Fig. 1 is a diagram showing an overview of the camera 2 system of the present invention;
The figure shows an example of a circuit related to a camera according to the present invention.
Figure JIg3 is a diagram showing an 8240 example of the same circuit, and Figure 4 is a diagram showing an example of the configuration of an imaging means applicable to the present invention. ST...shutter, SM...imaging means, VRI,
CI...Time constant circuit for exposure control, Mg2...Magnet for shutter closing), DM-...Imaging element drive circuit. Patent applicant Canon Co., Ltd.

Claims (3)

[Claims] (1) When the film is configured to have a timing means for controlling the exposure time of the shutter and to selectively attach the silver halide film and the imaging means to the focal plane of the imaging light source system, and the film is attached. In the camera 20, the time setting means is operated in conjunction with the start of opening of the shutter, and when the image pickup means is attached, the time setting means is operated in conjunction with the entire shutter El. (2) When the image capturing means is attached, the image capturing means starts accumulating images in conjunction with the start of the timing means, and ends image accumulation in response to a shutter closing signal from the timing means. A camera according to claim 11, characterized in that the camera is configured to do the following: (3) When the imaging means is attached, the start-up of the timing means is controlled by a delay means timed by a shutter opening start signal.
A patent characterized in that the camera described in item 1) is configured such that when the photographing means described in Section 2 (4) III is attached, sensitivity information of the photographing means is input to the camera in conjunction with the attachment. A camera according to claim (1).