JPH0990475A - Finder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately adjust the diopter of a photographer in the case of manual diopter adjustment. SOLUTION: This finder device is equipped with a diopter adjusting mechanism 2 generating driving force for driving the diopter adjusting lens of a finder optical system to a diopter adjusting position, a diopter adjusting mode starting mechanism 3 detecting that a mode is switched to the diopter adjustable mode by the mechanism 2, and a display part performing display for adjusting the diopter within the finder optical system based on output from the mechanism 3. The diopter is adjusted by driving the mechanism 2 based on the display of the display part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus used for, for example, a camera, and more particularly to a finder apparatus having a finder optical system having a diopter adjusting function.

[0002]

2. Description of the Related Art Conventionally, the diopter of a viewfinder of, for example, a single-lens reflex camera is generally set to -1 diopter, but for people with myopia, hyperopia, and presbyopia, it is clear that the diopter does not change depending on the degree. Sometimes you can't see it. In such a case, it is necessary to correct the diopter, and a diopter correction lens is used for that purpose. Then, when actually correcting the diopter, the diopter correction lens is manually driven.

[0003]

However, in the manual diopter adjustment as described above, it is difficult to understand what is an index for adjusting the diopter, so if the diopter adjustment is made anywhere in the optical path of the finder. There is a problem that it is difficult for the photographer to judge whether it is good or not. The present invention has been made in view of the above problems, and an object of the present invention is to easily and accurately adjust the diopter of a photographer by manual diopter adjustment.

[0004]

In order to achieve the above object, a finder device according to a first aspect of the present invention provides a driving force for driving a diopter adjusting lens of a finder optical system to a diopter adjusting position. Diopter adjusting means for generating, mode detecting means for detecting switching to the diopter adjustable mode by the diopter adjusting means, and diopter adjusting means in the finder optical system based on the output of the mode detecting means. It is characterized in that the diopter is adjusted by driving the diopter adjusting means based on the display of the display means.

In the finder device according to the second aspect, the driving means for driving the diopter adjustment lens of the finder optical system, the operating means for controlling the driving of the driving means, and at least the driving means and the operating means. It is characterized in that it is provided with a detection means for detecting one of the operations and a mode switching means for switching from the normal observation mode to the diopter adjustable mode based on the output of the detection means.

Further, in the finder device according to the third aspect, the diopter adjusting display means for adjusting the diopter by the operating means when the mode is switched to the diopter adjustable mode is provided in the finder optical system. It is characterized by being provided.

The first to third modes as described above have the following effects. That is, in the finder device according to the first aspect of the present invention, the diopter adjusting means generates a driving force for driving the diopter adjusting lens of the finder optical system to the diopter adjusting position, and the mode detecting means produces the diopter. It is detected by the adjusting means that the mode has been switched to the diopter adjustable mode, and the display means displays the diopter adjustment in the finder optical system based on the output of the mode detecting means. Based on this, the diopter adjustment is performed by driving the diopter adjusting means.

In the finder apparatus according to the second aspect, the driving means drives the diopter adjusting lens of the finder optical system, the operating means controls the driving of the driving means, and the detecting means controls at least the driving means and the above-mentioned driving means. The operation of any one of the operating means is detected, and the mode switching means switches the normal observation mode to the diopter adjustable mode based on the output of the detecting means.

Further, in the finder device according to the third aspect, the diopter adjusting display means for adjusting the diopter by the operating means when the mode is switched to the diopter adjustable mode is provided in the finder optical system. It is provided.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a finder device according to the first embodiment and will be described. As shown in FIG. 1, a finder optical system 1 for viewing a subject image,
A diopter adjustment mechanism 2 provided in the finder optical system 1 for adjusting the diopter of an observer, and a diopter adjustment mode different from the normal observation mode provided in the finder optical system 1 for starting the diopter adjustment mode. It is composed of a diopter adjustment mode start mechanism 3 and an operation section 4 for mechanically operating the diopter adjustment mechanism 2 and for starting the diopter adjustment mode start mechanism 3. The operation unit 4 may be a conventional manual knob, a slide type lever, or an electric type.

As shown in FIG. 1, the diopter adjustment mode starting mechanism 3 is started after detecting the operation of the operating section 4, but as shown in FIG. Alternatively, the operation may be started via the detection unit 5 that detects the second movement.

Next, FIG. 3 shows the structure of a finder device according to a second embodiment in which the present invention is applied to a camera having an external finder. As shown in FIG. 3, the finder system 10 includes an image forming unit 13 for forming an image of a subject 11 on a predetermined surface 12 in the optical path of the finder, and a display unit 1 including an LED for performing a predetermined display on the predetermined surface 12.
9 and the diopter adjustment lens unit 1 for adjusting the diopter of the photographer 14 on the predetermined surface 12 in the finder optical system 10.
It is composed of 5 and 5.

A motor 20 as a driving unit for driving the image forming unit 13 and a diopter adjustment for manually adjusting the diopter in conjunction with the diopter adjusting lens unit 15 are provided in the finder device. A knob 16, a distance measuring section 17 for measuring the distance to the subject 11, a detecting section 18 for detecting the operation of the diopter adjustment knob 16, and a release SW 21 which is a command for starting an actual photographing operation are provided.

Although the diopter adjustment knob 16 is a manual knob, it may be a mechanism that operates electrically. Further, although the detection unit 18 detects the operation of the diopter adjustment knob 16, it may detect the operation of the diopter adjustment unit 15. Although not shown here, the release SW 21 includes a first stage (hereinafter referred to as 1R) and a second stage (hereinafter referred to as 2R).
(Referred to as R).

The photographing system 22 includes a photometric circuit (not shown) for photometry of the subject 11 for proper exposure, a photographing optical system (not shown) for photographing, a focus adjusting system for adjusting focus, and a film (not shown). In addition, a photographing exposure system (not shown) including a photographing exposure system that exposes the image of the subject 11 and a photographing drive system that drives a photographing optical system is provided. In addition, the CPU that controls the entire system
Reference numeral 23 denotes a photometric circuit (not shown), a distance measuring unit 17, and a detecting unit 1.
8, a display unit 19, a motor 20, and a release SW 21 are connected.

In the present embodiment, description of general functions such as film rewinding, battery check performed at a predetermined timing, internal timer counter, strobe light emission, zooming, etc. is omitted, but the present invention is of course omitted. Needless to say, it may be built in.

The operation of the second embodiment will be described below with reference to the flowchart of FIG. First, in FIG. 3, a camera sequence is started by turning on a power switch of a camera (not shown) (step S1). Then C
The camera is mechanically and electrically initialized based on the data stored in the PU 23 (step S2).

Subsequently, the CPU 23 determines whether the photographer 14 operates the diopter adjustment knob 16 in order to adjust the diopter.
That is, it is determined whether the ON signal is input to the detection unit 18 (step S3). If it is determined that it is turned on, the process proceeds to a subroutine "diopter adjustment" described later (step S10). Then, after this sequence, the process proceeds to step S3 again.

In step S3, the diopter adjustment knob 16
If it is determined that is not turned on, the CPU 23
Determines whether 1R of the release SW21 is turned on (step S4). Here, if it is turned on, the CPU 23 obtains distance information from the distance measuring unit 17 (step S5). Based on this distance measurement information, the CPU 23 drives the in-finder optical system image forming unit 13 to form an image of the subject 11 on the predetermined surface 12 (step S6). Subsequently, the CPU 23 obtains photometric information by a photometric circuit (not shown) (step S7).

Next, the CPU 23 causes the release SW 21
It is determined whether or not 2R is turned on (step S8).
Here, when it is turned on, the focus of the focus adjustment unit of the photographing optical system (not shown) is adjusted to the subject 11 by the photographing drive system (not shown) by the distance measurement information, and the photographing exposure system is set by the photographing exposure system based on the photometry information. The subject image 11 is exposed on the film (step S9), and the camera sequence ends (step S1).
4).

If 2R is not turned on in step S8, the CPU 23 determines whether 1R is turned on (step S12). This is because it is determined whether the distance measurement information and the photometry information remain in steps S5 and S7.
When 1R is ON in this step S12, it is determined whether it is within a predetermined time (step S13). Then, if it is within the predetermined time, the process proceeds to step S8, and if it exceeds the predetermined time, the process proceeds to step S14 to end the camera sequence.

If 1R is not ON in step S12, the distance measuring and photometric information of the CPU 23 is reset and the process proceeds to step S3. Then, 1R is turned on in step S4
If not, it is determined whether it is within the predetermined time (step S1).
1). Then, if it is within the predetermined time, the process proceeds to step S3, and if it exceeds the predetermined time, the process proceeds to step S14 to end the camera sequence.

Here, the processes of steps S11 and S13 are performed to prevent the camera from being left with the main power turned on, to eliminate the waste of the battery, and to detect the abnormal state with 1R being pressed. This is to prevent it.

Next, the sequence of the subroutine "diopter adjustment" executed in step S10 will be described with reference to the flowchart of FIG. When the detection unit 18 detects that the diopter adjustment knob 16 has been operated and starts the diopter adjustment sequence, the distance measurement unit 17 detects the distance measurement information of the subject 11 according to a command from the CPU 23 (step S21). Based on this information, the image forming unit 13 in the finder optical system is driven to form an image of the subject 11 on the predetermined surface 12 (step S22). Then, the finder optical system 10
A predetermined display on the display section 19 therein is lit on the predetermined surface 12 (step S23). This step S22, S23
Thus, the subject image 11 and the predetermined display match on the predetermined surface 12, and the predetermined position for diopter matching can be clearly understood.

Subsequently, the CPU 23 determines whether or not the release SW 21 is turned on (step S24). Here, if it is OFF, the detection unit 18 causes the diopter adjustment knob 1
It is determined whether 6 is operated (step S25).
When it is detected that the diopter adjustment knob 16 is operated, the process proceeds to step S24. This step S2
5, the diopter adjusting knob 16 is operated to operate the diopter adjusting unit 1.
5 is manually driven to adjust the diopter to the predetermined surface 12. Although the diopter adjustment unit 15 is manually driven here, it may be electrically driven.

Here, in FIG. 6, the diopter adjustment knob 16 and the diopter adjustment portion 15 are mechanically connected, and the diopter adjustment knob 13 is electrically connected to the contact type detection portion 18 and the CPU 23. The detection section 18 detects the operating state of the diopter adjustment knob 16 and transfers the information to the CPU 23. In the figure, the detection unit 18 is a contact type, but may be a photo interrupter or the like which is an optical detection unit.

In step S25, the diopter adjustment knob 1
When it is determined that 6 has not been operated, it is determined whether a predetermined time has elapsed (step S26). Here, if it is within the predetermined time, the process proceeds to step S24 again. If the release SW 21 is turned on in step S24, or if the predetermined time has elapsed in step S26, the predetermined display lit in step S23 is turned off (step S27), and the image forming unit 13 in the finder optical system 10 is turned on. Is driven to a predetermined position (step S28), and the diopter adjustment sequence ends (step S29).

Incidentally, in the step S24, the release S
Although it exits the diopter adjustment mode by turning on W21,
Others such as power switch and zoom SW of zoom camera
It doesn't matter. Further, the reason why the diopter adjustment mode is exited after the elapse of the predetermined time in step S26 is to suppress unnecessary power consumption for the predetermined display when the diopter adjustment mode is left as it is. . In this sequence, when the diopter adjustment mode is entered, the image forming unit 13 is driven,
Although the position of the diopter adjustment is made easy to understand by performing a predetermined display on the display unit 19, only one of them may be used, or the state in the viewfinder may be different from other shooting states.

Here, in the display of the display section 19 in the finder, the frame of the finder may be lit as shown in FIG. 10 (a), or the mark may be lit as shown in FIG. 10 (b).
As shown in FIG. 10C, the display regarding the function may illuminate.

As described above, according to the second embodiment, an observer looking into the finder operates the diopter adjustment knob so that the finder device automatically determines that diopter adjustment is desired. However, since it is in the diopter adjustment mode, it is easy to adjust the diopter and a low-cost diopter adjustment system can be realized.

According to the above embodiment of the present invention, the following configuration can be obtained. (1) Driving means for driving a diopter adjusting lens of a finder optical system, diopter adjusting means for mechanically controlling the driving means and switching from a normal observation mode to a diopter adjustable mode by its operation, A diopter adjusting display means for performing a display for adjusting diopter based on the diopter adjusting main plan when the mode is switched to the diopter adjustable mode. (2) The finder device according to (1), wherein the switching to the diopter adjustable mode is performed by electrically detecting the operation of the diopter adjusting means. (3) The finder device according to (1), wherein the diopter adjusting means includes a diopter adjusting means material, and the diopter adjusting means material is manually or electrically driven.

[0032]

As described in detail above, according to the present invention,
It is possible to provide a finder device that easily and accurately adjusts the diopter of an observer who is observing the finder at low cost.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a finder device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an improved example of the finder apparatus according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a finder device according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation according to the second embodiment.

FIG. 5 is a flow chart showing a sequence of a subroutine “diopter adjustment”.

FIG. 6 is a diagram showing a positional relationship between a diopter adjustment knob 16 and a detector 18.

7 is a diagram showing a display example of a display section 19 in the finder optical system 19. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Finder optical system, 2 ... Diopter adjustment mechanism, 3 ... Diopter adjustment mode start mechanism, 4 ... Operation part, 5 ... Detection part, 10 ... Finder optical system, 11 ... Subject, 12 ... Predetermined surface, 13 ...
Imaging unit, 14 ... Observer, 15 ... Diopter adjustment lens unit, 16
... Diopter adjustment knob, 17 ... Distance measuring unit, 18 ... Detection unit, 19
... Display section, 20 ... Motor, 21 ... Release SW, 22 ...
Shooting system, 23 ... CPU.

Claims (3)

[Claims] 1. A diopter adjusting means for generating a driving force for driving a diopter adjusting lens of a finder optical system to a diopter adjusting position; and a diopter adjusting mode switched by the diopter adjusting means. And a display unit for displaying a diopter adjustment display in the finder optical system based on the output of the mode detection unit, and the diopter adjustment based on the display of the display unit. A finder device characterized in that the diopter is adjusted by driving the means. 2. A driving means for driving a diopter adjustment lens of a finder optical system, an operating means for controlling driving of the driving means, and a detection for detecting an operation of at least one of the driving means and the operating means. A finder device comprising: a means and a mode switching means for switching from a normal observation mode to a diopter adjustable mode based on the output of the detection means. 3. A diopter adjusting display means for adjusting the diopter by the operating means when the diopter adjusting mode is switched to is provided in the finder optical system. The finder device according to claim 2.