JPH07191381A - Camera capable of imprinting data - Google Patents

Abstract

PURPOSE:To confirm the kind of imprinted data, whether imprinting is performed or not, and an exact position where the data is imprinted by providing a light projecting part for displaying the specified data on an image- formation surface so that it can be visually recognized. CONSTITUTION:Light transmitted through a photographing lens 1 is temporarily formed into an image on the mat surface 3b of a screen 3 through a return mirror 2. Thereafter, the transmitted light reaches an ocular 6 through a condenser lens 4 and a pentagonal prism 5, and is observed by a photographer. The light projecting part 8 is provided at both sides of the ocular 6. The light projecting part 8 has six well-known 7-segment LEDs. The light projected from the light projecting part 8 is formed into the image on the mat surface 3b of the screen 3 through the prism 5 and the lens 11. Therefore, the content and the position of the imprinted data are confirmed while viewing an actual photographing picture, so that data imprinting photographing is rapidly and surely performed, and there is no possibility that an instantaneous shutter release opportunity is missed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of imprinting data such as date on a recording medium such as film.

[0002]

2. Description of the Related Art Conventionally, a camera capable of imprinting data such as date is known. FIG. 6 is a view showing the outer appearance (back cover side) of a conventional camera. The setting button 31 is used to set and correct the date. Mode switching button 33
By this, the date and time array and whether or not to imprint are switched. The data set by the setting button is displayed on the data display section 32. If no data is displayed on the display unit 32, the data imprinting is OFF, and if any data is displayed, the displayed data is imprinted. The photographer can set and confirm the imprint data while looking at the data display section 32.

[0003]

However, in the conventional camera, the display portion is provided so as to be visible from the outside of the camera. Therefore, once the photographer looks into the finder, the photographed data is checked and the current copy is made. I could not check whether it was set to the embedded mode or not, and I had to take my eyes off the viewfinder when checking and correcting the imprinted data. For this reason, there are problems that the photographer feels annoyed and that a momentary shutter chance is missed in a space away from the viewfinder.

Further, in the conventional camera, since it is not possible to confirm the exact position where the data is imprinted on the photographing screen,
For example, when data is imprinted on a subject having high brightness, there is a problem that the data cannot be read after the film is developed. The present invention has a data imprinting device capable of confirming the type of imprinting data and the presence / absence of imprinting while looking through the finder at the time of shooting, and also confirming the exact position at which the data is imprinted, by solving the above problems. The purpose is to provide a camera.

[0005]

In order to achieve the above object, according to the present invention, a subject light transmitted through a taking lens is passed through a viewfinder optical system to an eyepiece lens of a camera capable of imprinting predetermined data on a recording medium. An image-forming plate (3) having an image-forming surface (3a) on which the subject light is imaged, which is arranged in the viewfinder optical path until reaching, and predetermined data is visibly displayed on the image-forming surface. And a data display means (8).

[0006]

In the present invention, a camera capable of imprinting predetermined data on a recording medium is arranged in the viewfinder optical path until the subject light transmitted through the taking lens reaches the eyepiece through the viewfinder optical system. Since the image forming plate having the image forming surface on which the subject light is formed and the data display means for visually displaying the predetermined data on the image forming surface are configured, the contents and position of the data to be copied are Confirmation can be performed while looking at the actual shooting screen, which enables quick and reliable data-imprinted shooting.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is an internal cross-sectional view of a camera using the present invention, and FIG. 2 is an external view of the main part of FIG. The light transmitted through the taking lens 1 is temporarily imaged on the matte surface (also referred to as a focal surface or a focus surface) 3b on the screen 3 via the return mirror 2. The opposite side of the screen 3 (the upper surface of the screen 3) is a Fresnel lens 3a. After that, the transmitted light reaches the eyepiece 6 through the condenser lens 4 and the pentaprism 5, and is observed by the photographer. Further, the transmitted light is incident on the light receiving element 7, and the brightness thereof is measured.

Projectors 8a and 8b are provided on both sides of the eyepiece lens 6.
Is provided. The light projecting section 8 is provided with six known 7-segment LEDs, respectively. The light emitted from the light projecting unit 8 is a penta prism 5 and a condenser lens 4.
An image is formed on the matte surface 3b on the screen 3 via.
The light projecting units 8a and 8b can be switched to either one by a light projecting selection unit 17 described later. FIG. 3 is a block diagram of the inside of the camera body. The central processing circuit 10 (hereinafter referred to as a CPU) includes a light receiving element 7 for detecting the brightness of a subject in a photographing screen, a film information detecting section 11 for detecting film information including film sensitivity information (known DX).
Contact point), a film presence / absence detection unit 12 for detecting whether or not a film is loaded in the camera, an imprint setting unit 13 for setting and canceling imprint, or changing imprint data, and an imprint setting unit. If the imprinting is set by 13, the imprinting light emitting section 15 (consisting of six 7-segment LEDs) that emits light for imprinting, and the light projecting section 8 that emits light so that it is visible in the viewfinder ( In the present embodiment, two of 8a and 8b), the light projecting unit 8
A light projecting selection unit 17 for selecting which of a and 8b is to be projected is connected. In addition, the light projecting portions 8a and 8b
The same LED and the LED of the imprinting light emitting unit 15 emit light of the same color.

The CPU 10 controls the current value or the light emission time for the imprinting light emitting section 15 in accordance with the object brightness information and the film sensitivity information detected at the DX contact to adjust the imprinting light amount, and then projects the light. For the light section 8, the current value is controlled to adjust the emission brightness. Specifically, if the film sensitivity of the loaded film is high, the current to be supplied is decreased, and if the film sensitivity is low, the current to be supplied is increased. The CPU 10 controls the light emission amount of the light projecting unit 8 so that the brightness of the data 21 displayed by the light projecting unit 8 becomes substantially the same as the brightness of the data actually printed. Next, the operation of the CPU 10 will be described with reference to FIG. To simplify the description, the flow of the imprinting operation is omitted and only the operation of displaying in the finder is described.

In this flowchart, a known half-press switch (not shown) that is turned on and off by half-pressing the release button is turned on.
Starts when N is given. In step S1, it is determined whether or not a film is loaded in the camera. If loaded, the process proceeds to step S2, and if not loaded, the process proceeds to step S10.

In step S2, film information is read. Specifically, film information (including film sensitivity information) is read from a known DX code provided on the film via a DX contact (not shown). Then, the process proceeds to step S3. In step S3, photometry is performed based on the output of the light receiving element 7. As shown in FIG. 5A, this light receiving element is provided with a known multi-photometric element that divides the photographic screen into a plurality of areas A to E and performs photometry.

In step S4, the imprint setting unit 1
Based on the output from 3, it is determined whether or not imprinting is set. If it is set, the process proceeds to step S5, and if it is not set, the process proceeds to step S10. Step S5
In accordance with the output of the light projecting selection unit 17, the light projecting unit 8
It is determined whether either a or 8b is set to emit light. If the projector 8a is selected, step S
If the light projecting unit 8b is selected in 6, the process proceeds to step S8.

In step S6, the light emission amount of the most visible LED and the current value to be passed in order to obtain the light emission amount are calculated based on the photometric output of the area E in the photographic screen and the film sensitivity value. After that, the process proceeds to step S7. In step S7, the current calculated in step S6 is caused to flow through the LED of the light projecting portion 8a to light it. Then step S
Go to 10.

On the other hand, if the light projecting portion 8b is selected in step S5, in step S8, the light emission amount of the LED that is most easily visible based on the photometric output and the film sensitivity value of the area D in the photographing screen, And a current value to be passed in order to obtain the amount of light emission. After that, the process proceeds to step S9. In step S9, the current calculated in step S8 is caused to flow through the LED of the light projecting portion 8b to light it. Then step S
Go to 10.

In step S10, it is determined whether the half-push switch has been turned off. If it is off, the process proceeds to step S11, and if it is on, the light emitting state is maintained until it is turned off. In step S11, the LED (8a or 8b) that was emitting light is turned off. Then, the flow ends.

Note that steps 6, 7 and 8,
The calculation of 9 and the method of controlling the light emission amount of the LED are known in, for example, Japanese Utility Model Laid-Open No. 59-17435, and the details thereof are omitted. FIG. 5B is a diagram showing a viewfinder screen of a camera using the present invention.

The area surrounded by the screen frame 20 is a photographing screen, and the data 21a superimposed and displayed is displayed in the screen frame 11. The data 21a is data that can be visually recognized by the light projected by the light projecting unit 8a. If the light projecting unit 8b is selected by the light projecting selection unit 17, the data 21
The data 21b is visually recognized at the illustrated position instead of a.

The data 21 is recorded in the imprinting light emitting unit 15
Has the same content as the imprint data actually imprinted, and the display position on the shooting screen also matches the imprint position on the print screen. Here, in this embodiment,
Regarding the control of the imprinting position, the imprinting position is arbitrarily set by a known method of imprinting while winding the film. For this reason, even if there is a plurality of light projecting portions 8 but only one imprinting light emitting portion 15 as in this embodiment, printing can be performed at the same position as the display position.

It is also possible to provide a plurality of imprinting light emitting portions at positions that are the same as the data projection position of the light projecting unit 8 with respect to the photographic screen when emitting light. Further, the color and brightness of the displayed data 21 are also controlled by the CPU 10 so as to be the same as the color and brightness of the data actually printed. In this embodiment, it is manually (by operating the light emission selection unit 17).
Although the light projecting units 8a and 8b are selected, the present invention is not limited to this, and based on the photometric output of the light receiving element 7, an area having a low brightness value (dark) among a plurality of areas in the photographing screen. Is automatically detected by the CPU 10 (at least automatically by comparing the photometric output of the area in which the image can be imprinted), and data is displayed in the detected area (in the finder), and The data may be imprinted at the print position corresponding to the detected area. With such a configuration, there is an effect that it is possible to perform data display and data imprinting that are easy to visually recognize without changing the hand of the photographer.

Further, although the light projecting portions 8a and 8b are provided on both sides of the eyepiece lens 6 in this embodiment, the present invention is not limited to this arrangement position. For example, it may be arranged in the vicinity of the third reflecting surface of the pentaprism, and at the time of light projection, it may be once projected on the mirror 2 and focused on the matte surface 3b. Further, it may be arranged near the mirror down position (near the free end of the mirror when the mirror 2 is down), and an image may be directly formed on the mat surface 3b. In this way, the arrangement position of the light projecting portion 8 can be imaged on the mat surface 3b,
In addition, it can be freely determined as long as it has no adverse effect (for example, adverse effect of exposing the film to light).

Further, in the present embodiment, the LED is used as the light projecting portion so as to confirm the data in the founder. However, whether or not the imprinting is performed or the position of the imprinted data is confirmed. Also, for the purpose of confirming the brightness of imprinting, it is possible to use an LCD. Specifically, the LCD is arranged between the eyepiece lens 6 and the pentaprism 5 or near the screen 3, and L
The above object can be achieved by controlling the voltage applied to the CD.

[0022]

As described above, according to the present invention, since the content and position of the data to be imprinted can be confirmed while looking at the actual photographing screen, quick and reliable imprinting of imprinted data becomes possible. Also, there is no risk of missing a momentary photo opportunity. Also, before shooting (imprinting), it is possible to check whether or not the imprinting position overlaps the subject with high brightness, so you can change the composition or cancel the imprinting of data before shooting. Can take measures.

[Brief description of drawings]

FIG. 1 is an internal cross-sectional view of a camera using the present invention.

FIG. 2 is an external view of the main part of FIG.

FIG. 3 is a block diagram of the inside of the camera body.

FIG. 4 is a flowchart showing an operation of the CPU 10.

FIG. 5A is a diagram of a light receiving element that divides the photographic screen into a plurality of areas for photometry, and FIG. 5B is a diagram showing a finder screen of a camera using the present invention. .

FIG. 6 is a diagram showing an example of an imprint data setting operation unit of a conventional camera.

[Explanation of symbols for main parts]

 3 screen 3a Fresnel lens 3b matt surface 7 light receiving element 8 light emitting section

Claims (4)

[Claims] 1. A camera capable of imprinting predetermined data on a recording medium, wherein the subject light transmitted through a taking lens is arranged in a finder optical path until it reaches an eyepiece lens through a finder optical system. A data-imprintable camera including an image-forming plate having an image-forming surface on which the image is formed, and data display means for visually displaying the predetermined data on the image-forming surface. 2. The camera is capable of imprinting the predetermined data at a first position on a recording screen on a recording medium, and the data display means is arranged to transfer the predetermined data to the first position on the photographing screen. The data imprintable camera according to claim 1, wherein the camera is displayed at substantially the same position as. 3. The camera is capable of imprinting the predetermined data in a predetermined color on a recording medium, and the data display means displays the predetermined data in the predetermined color on the image forming surface. A camera with a data imprinting device according to claim 1, characterized in that. 4. The camera is capable of imprinting the predetermined data on a recording medium with a predetermined brightness, and the data display means displays the predetermined data on the image forming surface with the predetermined brightness. Claim 1 characterized by the above.
A camera that can imprint the described data.