JPH0882738A - Close-up photography camera - Google Patents

Abstract

PURPOSE: To judge whether or not an object exists in a close-up position set by a camera by making a crossing between two visible rays optical axes and a photographing lens optical axis coincide with the close-up position. CONSTITUTION: A pair of visible rays irradiation means 5, 6 are stroboscopic light emission, etc., using an electric-light bulb, an LED and a xenon tube, and they are set in both positions while holding a photographing lens barrel 4 therebetween, and respective irradiation optical axes 5a, 6a intersect in a close-up point on the photographing lens optical axis 4a. Further, an irradiated spot light beam is focus adjusted to the close-up point 12 also. Then, in a sunk body state, when a finder block 1 is turned to a position being click-stopped around an axis 0 as a fulcrum, the up-switch of the finder block 1 is turned on. Thus, the visible rays irradiation means 5, 6 are turned on, and visible rays from the visible rays irradiation means 5, 6 intersect with the close-up point 12 on the photographing lens optical axis 4a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a close-up camera capable of switching from a normal shooting mode to a close-up shooting mode.

[0002]

2. Description of the Related Art Conventionally, as a device for illuminating a subject with spot light, as disclosed in, for example, Japanese Patent Application Laid-Open No. 51-113621, there is one auxiliary light for a double image matching type rangefinder of a finder. Those radiated with spot light, or as described in JP-A-51-110322, spot light is radiated onto a subject, and the projected image is used as a temporary subject in a double-image matching viewfinder. There was something to focus on.

Further, as described in JP-A-5-88237, JP-B-5-5340, etc., in order to correct the viewfinder parallax in the close-up photography mode, the mirror angle is changed and the viewfinder optical system is used. Some also have a prism inserted inside.

[0004]

However, in the above-mentioned conventional example, when the spot irradiation light is simply used as the auxiliary light for illuminating the object, the central portion of the double image matching viewfinder is a half mirror. The image from the rangefinder optical system was doubled, making it difficult to see.

Further, when the spot irradiation light is a temporary object image of the double image matching type finder, the spot irradiation position and the optical axis of the distance measuring optical system for double image matching do not match. Therefore, a distance measurement error occurs. This distance measurement error becomes a non-negligible amount in consideration of the depth of field in the close-up photography mode.

Further, if a finder parallax is corrected in the finder in the close-up photography mode to apply the finder parallax to the double image matching type, the optical axis with the distance-measuring optical system is deviated and the focus is reduced. There was a problem that it became impossible to match.

An object of the first to fifth inventions according to the present application is to make the center of the photographing screen clear, to accurately determine the close-up position, and to make the viewfinder field easy to see.

A sixth object of the present invention is to make it possible to make the finder optical system coincide with a predetermined close-up focusing position at the time of close-up photographing.

[0009]

A close-up camera according to a first aspect of the present invention is a close-up camera capable of switching from a normal shooting mode to a close-up shooting mode, in which the shooting lens is interlocked with switching to the close-up shooting mode. At least two visible light optical axes and a photographing lens optical axis are provided, and a lens feeding means for feeding to a close-up position, and a visible light irradiation means for irradiating a subject with at least two or more visible light rays sandwiching the photographing lens. By matching the crossing point with the close-up position, even if the viewfinder optical axis does not match the close-up position on the shooting lens optical axis, the center of the shooting screen will be It becomes clear and the close-up position can be accurately judged.

A close-up camera according to the invention of claim 2 is
It is possible to determine whether the close-up focusing position is in front of or behind the current position by making the irradiation images of at least two visible rays irradiating the subject different from each other.

In the close-up camera according to the third and fourth aspects of the present invention, at least two or more visible light irradiation images for irradiating the subject are symmetrical when they are combined with each other at a focused position. Since the image is of a substantially semi-circular symmetrical type having a substantially circular shape, it can be clearly determined that the image is located at the close-up point, and the position of the camera can be corrected quickly and accurately.

The close-up camera according to the invention of claim 5 is
The irradiation optical axis of at least two or more visible rays irradiating the subject is different from the imaging lens optical axis by at least two or more angles, so that a small angle with the imaging lens is wide range. The one with a large angle can be used for highly accurate positioning near the in-focus position.

The close-up camera according to the invention of claim 6 is
By blinking the visible light, even if it is difficult to see the reflection of the irradiation light by the subject, the blinking makes the reflection point and the reflection image clear, and the afterimage phenomenon of the eye also acts, so that the two reflection lines It becomes easier to find the close-up position that matches. Further, the blinking reduces the irradiation energy, which is also effective as energy saving.

A close-up camera according to the invention of claim 7 is
In a close-up camera capable of switching from a normal shooting mode to a close-up shooting mode, a viewfinder optical system having an optical axis different from the optical axis of the taking lens and an optical axis of the viewfinder optical system are set on the optical axis of the taking lens. And a visible light irradiation for irradiating a subject with at least two or more visible light spots with the taking lens sandwiched between the taking-out lens and the lens feeding means for moving the taking lens to the close-up position. By having means and
It is now possible to match the viewfinder optical system to a specified close-up focus position during close-up photography. Furthermore, by irradiating visible light, it has become possible to also use the close-up mode display that informs the photographer that the camera is surely in the close-up mode.

[0015]

【Example】

First Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a close-up camera showing a first embodiment that best represents the features of the present invention, FIG. 2 is a vertical sectional view in the close-up shooting mode of the close-up camera, and FIG. 3 is a vertical sectional view in the normal shooting mode. is there. 1 to 3, reference numeral 1 denotes a finder block, and a protective plate 16, an objective lens 17, a frame reflection lens 18, and an eyepiece lens 19 are arranged on the optical axis 1a as a finder optical system. The finder block 1 is rotatably supported by the camera body 2 about the axis O, and is stopped by clicking means (not shown) at each position of the close-up photographing mode of FIG. 2 and the normal photographing mode of FIG. ing.

Reference numeral 3 denotes a release button, 4 denotes a taking lens barrel, which houses and holds the taking lenses 13, 14, 15 and a shutter mechanism 20, and is retracted by a motor (not shown) in the normal taking mode of FIG. To the close-up state in the close-up photographing mode of FIG. Reference numerals 5 and 6 denote a pair of visible light irradiating means, which are, for example, stroboscopic light emission using a light bulb, an LED and a xenon tube, and are installed at both side positions with the taking lens barrel 4 interposed therebetween, and their respective irradiation optical axes 5a and 6a. Intersect at the close-up point 12 on the optical axis 4a of the photographing lens. Also, the spot light that is emitted is the close-up point 1
Focus is adjusted to 2. Reference numeral 7 is a light receiving window of a distance measuring optical system provided on the front surface of the camera body 2, 8 is a light measuring window for exposure control provided in the vicinity of the light receiving window 7, and 9 is a light projecting window of the distance measuring optical system. Reference numeral 10 is a stroboscopic light emitting portion, and 11 is a back lid for taking out the film cartridge.

FIG. 4 is an electric circuit diagram of the above-mentioned close-up camera. In FIG. 4, 41 is a main control circuit composed of a control IC, 42 and 43 are release switches connected between the main control circuit 41 and a ground 44. And an up switch of the finder block 1, 45 is a control circuit of a motor 46 for winding the film, 47 is a control circuit of a motor 48 as a lens feeding means for moving the taking lens barrel 4 forward and backward in the optical axis direction, and 49 is a shutter mechanism 20. Is a control circuit for the motor 50 that drives the
7, 49 are connected to the main control circuit 41. Further, the main control circuit 41 includes a photometry circuit 51 and a distance measurement circuit 52.
Is connected, and 53 is a battery which is a power source.

Next, the operation of the first embodiment will be described with reference to the flowchart of FIG. Now, the shooting lens barrel 4
In the retracted state of FIG.
When the finder block 1 is rotated about the axis 0 as a fulcrum to a position where it is clicked, the up switch 43 of the finder block 1 is turned on. Therefore, ST5-1
The result is YES, the process proceeds to ST5-9, the visible light irradiating means 5 and 6 are turned on, and the visible light from the visible light irradiating means 5 and 6 intersects the close-up point 12 on the optical axis 4a of the photographing lens. To do.

Further, the up switch 43 is turned on by the rotation of the finder block 1, so that the control IC 41 is brought into the close-up mode and the motor 48 is turned on.
Is operated by being controlled by the main control circuit 41, the taking lens barrel 4 is extended from the cover 1 (ST5-10), and the close-up photographing state shown in FIG. 2 is obtained.

In this close-up photography mode, the field of view of the finder block 1 is as shown in FIGS. FIG.
In FIG. 8, reference numeral 21 denotes the field of view of the finder block 1, which is indicated by the field frames 22 to 25. 26 is an AF mark indicating a distance measuring area to be used during normal shooting, 27 is a flower as an object, 28, 2
Reference numeral 9 is a reflected image of the light projected onto the subject 27 by the irradiation devices 5 and 6.

In FIG. 6, since the position of the camera with respect to the subject 27 is closer than the close-up point 12, the reflection images 28 and 29 are separated. Further, in FIG. 7, since the subject 27 is located at the close-up point 12, the reflected images 28, 2
9 almost coincides with each other to indicate one circle, but when the subject 27 is located farther than the close-up point 12 as shown in FIG. 8, the reflection images 28 and 29 are separated again and opposite to the case of FIG. The reflection images 28 and 29 are exchanged.

As a result, whether or not the subject 27 is located at the close-up point 12 of the camera can be confirmed by observing with the finder whether or not the reflected images 28 and 29 of the two projected light beams coincide with each other.

Then, when the release button 3 is pressed when the state shown in FIG. 7 is reached, the result of the decision as to whether the release is on (ST5-11) is YES, and the visible light irradiating means 5, 6 are turned off (ST5-12). , Perform photometry (ST5
-13), by controlling the shutter (ST5-1
4), the close-up photography in focus is performed, and after that,
The film is wound up one frame (ST5-8), and the close-up photographing operation is completed.

On the other hand, when it is determined in ST5-1 that the finder block 1 is not up (the collapsed state of FIG. 3), it is determined that the release button 42 has been closed by pressing the release button 3. A series of operations (ST5-3 to ST5-) of distance measurement, photometry, extension of the taking lens barrel 4, shutter control, and resetting of the taking lens barrel 4.
7) is sequentially performed to perform normal shooting, and then the film is wound up by one frame (ST5-8) to end the normal shooting operation.

Second Embodiment FIGS. 9 to 11 show a second embodiment of the present invention.
9 to 11, the reflected image 30 of the spot light projected from the visible light irradiation means 5 and the reflected image 31 of the spot light projected from the visible light irradiation means 6 are combined with each other at the in-focus position. As shown in FIG. 10, when the subject 27 is located at the close-up point 12, it is substantially circular as a symmetrical type that forms one shape. Therefore, when the relationship between the arcs of the reflection images 30 and 31 and the chords is simply seen, the subject 27 is taken close to the close-up point 1 of the camera.
It is possible to judge whether the value is closer to 2 (FIG. 9) or far (FIG. 11). As a result, the position of the camera can be corrected quickly and accurately, and
Since the reflection images 30 and 31 are combined to form one figure as shown in FIG. 10, it can be more clearly determined that the figure is located at the close-up point 12.

Third Embodiment FIG. 12 shows a third embodiment of the present invention. In a relatively small subject 32, the visible light irradiating means 5 is attached to the visible light irradiating means 6 and the photographing optical axis 4a. The position is farther from. As a result, when the subject 32 is at the position A or the position C, only the light emitted from the visible light irradiation means 6 hits, but in the vicinity of the position B, which is the close-up point 12, the light emitted from the visible light irradiation means 5 hits. Like

Therefore, when the object 32 is considerably far from the close-up point 12, the object 32 is located close to the close-up point 12 by finding the irradiation light 6a having a small angle with the optical axis 4a of the photographing lens. If it is, the irradiation light 5a having a high resolution and a large angle formed with the optical axis 4a of the photographing lens can be used for accurate positioning.

[0028]

As described above, according to the invention of claim 1, in the close-up camera capable of switching from the normal shooting mode to the close-up shooting mode, the shooting lens is moved to the close-up position by switching to the close-up shooting mode. A lens feeding means for feeding and a visible light irradiating means for irradiating a subject with at least two visible light rays sandwiching the photographing lens are provided, and an intersection between the at least two visible light optical axes and the photographing lens optical axis is provided. Since it is configured to match the close-up position, even if the viewfinder optical axis does not match the close-up position on the optical axis of the taking lens, the center of the shooting screen can be determined by the coincidence of two visible light rays. It can also be determined whether the subject is at the close-up position (distance) set by the camera. Further, the field of view of the finder is not a superimposing type using a half mirror like a double image matching type, but a projected image directly projected onto a subject is seen, which is much easier to see.

According to the second aspect of the invention, it is possible to know the direction of being too close or too far from the close-up position set by the subject camera, so that the position of the camera can be adjusted quickly.

According to the third and fourth aspects of the present invention, a symmetrical type is formed in which the irradiation images of at least two visible rays irradiating the subject are combined with each other at the in-focus position to form one shape. Since it is a symmetric type of a substantially semi-circular shape that becomes a substantially circular shape, it can be clearly determined that it is located at the close-up point, and the position of the camera can be corrected quickly and accurately.

According to the fifth aspect of the present invention, at least two or more visible light illuminating optical axes that illuminate the subject differ from each other by at least two or more angles with respect to the photographic lens optical axis. Therefore, not only can the object be detected if it is too far from the close-up position set by the camera, but also the position of the camera can be adjusted with high accuracy when it is close to the close-up position.

According to the invention of claim 6, since the visible light is made to blink, even if the reflection of the irradiation light is difficult to see by the subject, the blinking makes the reflection point and the reflected image clear. Therefore, by making the blinking cycle appropriate, the afterimage phenomenon of the eye also acts, and it becomes easy to find the close-up position where the two reflection lines match.

According to the invention of claim 7, in a close-up camera capable of switching from the normal shooting mode to the close-up shooting mode, a viewfinder optical system having an optical axis different from the optical axis of the taking lens, and the light of the viewfinder optical system. In conjunction with making the axis coincide with a predetermined close-up position on the optical axis of the taking lens, a lens feeding means for moving the taking lens to the close-up position, and at least two lenses with the taking lens interposed therebetween. Since the apparatus is provided with the visible light irradiation means for irradiating the visible light spot to the subject, it is possible to match the finder optical system with a predetermined close-up focusing position at the time of close-up shooting. As a result, another switch for performing close-up photography, a viewfinder optical axis replacement member for correcting parallax with the taking lens, for example,
It is no longer necessary to insert high-cost parts such as prisms on the optical axis of the finder with high precision.

Further, by pushing up the finder block to bring it into the close-up mode, when the close-up photographing is finished, the user puts the finder block pushed up for better portability into the stored state. There is no longer the need to irradiate the irradiation light to drain the battery.

[Brief description of drawings]

FIG. 1 is a perspective view of a close-up camera showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the close-up camera in a close-up shooting mode.

FIG. 3 is a vertical sectional view of the close-up camera in a normal shooting mode.

FIG. 4 is an electric circuit diagram of this close-up camera.

FIG. 5 is a flowchart illustrating the operation of the first embodiment.

FIG. 6 is an explanatory diagram of a viewfinder field image in a close-up shooting mode.

FIG. 7 is an explanatory diagram of a viewfinder field image in a close-up shooting mode.

FIG. 8 is an explanatory view of a viewfinder field image in a close-up shooting mode.

FIG. 9 is an explanatory view of a viewfinder field image in a close-up photography mode showing a second embodiment of the present invention.

FIG. 10 is an explanatory diagram of a viewfinder field image in a close-up shooting mode according to the second embodiment of the present invention.

FIG. 11 is an explanatory view of a viewfinder field image in a close-up photography mode showing a second embodiment of the present invention.

FIG. 12 is an explanatory diagram explaining a third embodiment of the present invention.

[Explanation of symbols]

 1a Optical axis of finder optical system 4a Photographic lens optical axis 5,6 Visible light irradiation means 5a, 6a Visible light optical axis 12 Intersection 13-15 Photographic lens 28-31 Visible light irradiation image

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G03B 3/00 A

Claims (7)

[Claims] 1. A close-up camera capable of switching from a normal shooting mode to a close-up shooting mode, with lens taking-out means for moving a shooting lens to a close-up position in conjunction with switching to the close-up shooting mode, and the shooting lens interposed therebetween. At least 2
A close-up camera, comprising: a visible light irradiating unit that irradiates a subject with one or more visible light; and an intersection of at least two visible light optical axes and an optical axis of a photographing lens coincides with a close-up position. 2. The close-up camera according to claim 1, wherein the irradiation images of at least two visible rays irradiating the subject are made different from each other. 3. The symmetric type in which the irradiation images of at least two or more visible rays irradiating the subject are combined with each other to form one shape at a focus position. 2 close-up camera. 4. A close-up camera, wherein the irradiation image according to claim 3 is a substantially semi-circular symmetrical type so that the irradiation image becomes substantially circular at a focus position. 5. The close-up camera according to claim 1, wherein the irradiation optical axes of at least two or more visible rays with which the subject is irradiated differ from each other by at least two angles with respect to the optical axis of the photographing lens. . 6. The close-up camera according to claim 1, wherein the visible light is blinked. 7. In a close-up camera capable of switching from a normal shooting mode to a close-up shooting mode, a viewfinder optical system having an optical axis different from the shooting lens optical axis, and the optical axis of the viewfinder optical system is set to the shooting lens optical axis. A lens feeding means for feeding the photographing lens to the close-up position and a visible light for irradiating a subject with at least two or more visible rays in conjunction with matching with a predetermined close-up position. A close-up camera, which is provided with an irradiation means.