JP2984613B2 - Optical device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a camera, and more particularly, to an imaging optical system capable of performing a zooming operation and a focus adjusting operation, and a zooming system according to a zooming state of the imaging optical system. The present invention relates to an optical device such as a camera including a finder for displaying a double image.

[0002]

2. Description of the Related Art In recent years, a lens shutter camera in which a finder optical system and a photographing optical system are configured separately from each other is equipped with a zoom lens barrel. This type of camera is generally called a zoom camera, and is configured such that the finder optical system also changes the magnification in conjunction with the zooming operation of the photographing optical system.

In general, a lens shutter camera is generally required to be small, light, and inexpensive in manufacturing cost as a design target. For example, the following proposals have been made to achieve the design target. ing.

(A) Japanese Patent Laid-Open Publication No. 5-173223 An apparatus in which a finder optical system is moved by a lever that follows a zooming operation of a lens barrel of a photographing optical system.

(B) Japanese Patent Laid-Open Publication No. Hei 2-24613 One in which focusing and zooming are performed by one motor.

(C) Japanese Patent Application Laid-Open No. 64-84233 One in which focusing and zooming are performed by a single motor via a helical bar.

(D) Japanese Patent Application Laid-Open No. 61-259237 A single serpentine or zigzag cam is formed by connecting a plurality of focusing cam grooves and zooming cam grooves having different directions at one end thereof. One in which a groove is formed, and a focusing optical system and a zooming system are alternately performed by a photographing optical system using the cam plate.

(E) In addition to the above proposals,
A finder optical system is interlocked with a photographing optical system that alternately performs a focusing operation and a zooming operation by a cam plate similar to the cam plate disclosed in Japanese Patent Application Publication No. 1-259237, and the photographing optical system is focused by the action of the cam. 2. Description of the Related Art A camera has been commercialized that has a configuration in which a finder optical system is stopped when operating, and when the photographing optical system performs a magnification operation, the finder optical system also performs a magnification operation in conjunction with the photographing optical system.

[0009]

In the camera (e) described above, for example, when the photographing optical system is moved from the telephoto end to the wide end, the cam follower of the photographing optical system sets the variable magnification area and the focus adjustment area of the cam. The size of the viewfinder image changes continuously in the variable magnification area of the cam because it moves alternately, but the size of the viewfinder image does not change in the focus adjustment area of the cam. However, as a result, there is a drawback that the camera user looking into the viewfinder gives an unnatural or unnatural feeling.

A first object of the present invention is to provide an optical device that does not cause unnaturalness or unnaturalness to a user looking through a finder.

A second object of the present invention is to perform a focusing operation according to the distance of an object of the imaging optical system without changing the magnification of the finder, and without changing the magnification of the imaging optical system. It is an object of the present invention to provide an optical device that does not cause unnaturalness or a sense of incongruity to a user looking through the viewfinder by performing a magnification change operation during the focus adjustment operation.

A third object of the present invention is to perform a focusing operation in accordance with the distance of an object in the imaging optical system without changing the magnification of the finder and without changing the magnification of the imaging optical system. Provides an optical device that does not cause unnaturalness or unnaturalness to the user looking through the viewfinder by causing the viewfinder to continuously change the magnification in accordance with the zooming operation of the imaging optical system and the focus adjustment operation during the focus adjustment operation. To make it possible.

A fourth object of the present invention is to provide a zooming guide area and a focus adjusting guide area alternately, and to form an imaging optical unit along the zooming guide area and the focus adjusting guide area. In the optical device that guides the imaging optical unit to perform a zooming operation and a focus adjustment operation, the imaging optical unit is guided by the focus adjustment guide for the focus adjustment operation according to the distance of the object. When the imaging optical unit is guided by the focus adjustment guide to change the magnification without changing the magnification of the viewfinder, the magnification of the viewfinder is changed so that the user looking into the viewfinder can change the magnification. An object of the present invention is to provide an optical device that does not cause unnaturalness or unnaturalness.

A fifth object of the present invention is to provide an optical device which can easily and inexpensively constitute a device for achieving the first to fourth objects.

[0015]

In order to achieve the above object, the present invention is directed to an optical device having the structure shown in each of the claims.

That is, for example, when the finder is operated in conjunction with the movement of the imaging optical system, and the focus adjustment operation is performed in a direction different from the movement of the imaging optical system after the movement. An optical device having a linking means for cutting off linking of the finder is provided. Further, a space forming unit that operates the finder in cooperation with the movement of the imaging optical system, and disconnects the finder from the movement of the imaging optical system in a direction different from the movement after the movement. The present invention is an optical device comprising: a linking means having means and a holding means for holding the finder so that the finder does not operate while being disconnected from the imaging optical system.

[0017] The image forming optical unit is provided with a guide area for zooming and a guide area for focus adjustment alternately, and guides the imaging optical unit along the guide area for zooming and the guide area for focus adjustment to form the image. Guiding means for causing the optical unit to perform a zooming operation and a focus adjusting operation; and linking the imaging optical unit to being guided in one direction along the zooming guide area and the focus adjusting guide area of the guiding means. To operate the finder, and after the imaging optical unit is guided in one direction along the zooming guide area and the focus adjusting guide area of the guide means, furthermore, the focus adjusting guide area of the guide means. And a linking means for disconnecting the finder from being guided in a direction different from the one direction.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Although the optical device according to the embodiment described below is a zoom camera, the optical device to which the present invention can be applied is not limited to a zoom camera.

<First Embodiment> FIG. 1 shows a first embodiment of the present invention. In the figure, reference numeral 2 denotes a first-group lens holding cylinder that holds the first group lens of the photographing optical system of the camera and is movable only in the optical axis direction, and 3 denotes an optical axis that holds the second group lens of the camera. 2 group lens holding cylinder that can move only in the direction
Is a lens barrel that moves integrally with the second lens holding barrel 3, 1 is a cam plate formed with cam grooves 1A and 1B and is moved in the direction of arrow f or g by a mechanism (not shown), and 2a is a first lens holding lens. The follower pin 3a fixed to the cylinder 2 and inserted into the cam groove 1B so as to be relatively slidable is fixed to the second lens holding cylinder 3 and inserted into the cam groove 1A so as to be relatively slidable. The follower pin 4a protrudes from the lens barrel 4 and engages with a lever 5 of a finder linking means, which will be described later. The linking pin 5 has a fixing pin 6 (a structural member (not shown)) in a hole 5a at one end. The first lever 7 fitted on the protruding pin) and rotatable about the pin 6 is fitted on the pin 6 so as to be rotatable in the hole 7b, and The rotatable second lever 8 is the second lever. A spring pressing member for suppressing unnecessary movement by applying a braking force to the lever 7 by gently sandwiching the upper and lower surfaces of the -7, a lens holding frame 9 for zooming of a finder optical system, and 9a for the zooming A follower pin projecting from the lens holding frame 9 and inserted into the third cam groove 7c of the second lever 7 is a spring for pressing the tip of the first lever 5 against the pin 4a of the lens barrel 4, and 11 is a spring. An objective lens of the finder optical system, 12 is a prism for image inversion, and 13 is an eyepiece of the finder optical system. The cam groove 1A formed in the cam plate 1 is for positioning the second lens group holding barrel 3 in the optical axis direction, and as shown in the drawing, the moving direction of the cam plate 1 (perpendicular to the optical axis of the camera). (A direction). On the other hand, a cam groove 1B for positioning the first lens holding cylinder 2 in the optical axis direction has a short straight groove portion 1b oriented in a first direction (a direction parallel to the cam groove 1A) as shown in FIG. A short straight groove portion 1c oriented in a direction (perpendicular to the optical axis) is configured in a “square-folded shape” in which the short straight groove portions 1c are alternately arranged in series, and the groove portion 1b is used to adjust the focus of the photographing optical system. The groove 1c is a zoom control cam for changing the magnification of the photographing optical system.

The position 1d of one end of the groove 1b is defined by the follower pin 2a of the first lens holding cylinder 2 in each groove 1b.
Is a focus adjustment standby position (focus adjustment operation start position).

In the above configuration, when the cam plate 1 is moved in the direction of arrow f when the follower pin 2a of the first lens group holding cylinder 2 is located in the groove 1b, the first lens group holding cylinder 2 and the second lens group holding cylinder are moved. 3 is moved forward by the same amount in the optical axis direction, and a so-called all-group moving-out type focusing operation is performed.

On the other hand, if the cam plate 1 is moved in the direction of the arrow f when the follower pin 2a is located in the groove 1c of the cam plate 1, the first group lens holding cylinder 2 does not move in the optical axis direction, and Since only the group lens holding cylinder 3 changes the position in the optical axis direction, the distance between the first group lens and the second group lens changes, and zooming of the photographing optical system is performed.

The first lever 5 and the second lever 7 constitute linking means for changing the magnification of the finder optical system in accordance with the zooming operation of the photographing optical system. The following non-coupling means for preventing the second lever 7 from interlocking with the second lever 7 is also provided.

In this embodiment, the non-cooperating means comprises a pin 5b projecting from the first lever 5 and a rectangular hole (or rectangular recess) 7a formed in the second lever 7.
The length of the long side of the square hole 7a is determined so as to cause the following movement between the first lever 5 and the second lever 7.

FIG. 2 is a diagram for explaining the relative positional relationship between the pin 5b of the first lever 5 and the square hole 7a of the second lever 7 when the photographing optical system performs the magnification operation and the focus adjustment operation. .

In the configuration of this embodiment, when the focusing operation is performed on the photographing optical system, the photographing optical system always moves from the focus adjustment standby position 1d corresponding to each magnification in the retraction direction (downward direction in FIG. 2). It is done by doing.

In FIG. 2A, the thick arrow indicates the focusing operation of the photographing optical system, and the thin arrow indicates that the photographing optical system is on the short focal length side (wide side).
This shows the movement of the pin 5b at the time of zooming.

When the photographing optical system is to be zoomed to the wide side, the cam plate 1 shown in FIG. 1 moves in the direction of the arrow (that is, the direction in which the photographing optical system is retracted), and the follower pin 2a is attached to the first lens holding cylinder 2. In the section of the cam groove 1b, it moves rearward along the optical axis, and does not move in the section of the cam groove 1c perpendicular to the optical axis.

On the other hand, since the follower pin 3a of the second group lens holding cylinder 3 is in the cam groove 1A, it always moves in the lens retracting direction (that is, rearward; right side in FIG. 1).
Since the lens barrel 4 integrated with the second group lens holding barrel 3 also moves in the lens retracting direction, the pin 4a and the pin 5b of the lever 5 also continuously move backward.

In FIG. 2A, when the zooming operation of the photographing optical system is started toward the wide position, the pin 5b moves from the front end position to the rear end position of the elongated hole 7a, and the pin 5b moves. During a very short period of time until the lens comes into contact with the rear end edge of the long hole 7a, the zoom lever holding frame 9 of the finder optical system does not move because the second lever 7 is not driven by the pin 5b, and therefore the finder optical system does not move. No scaling operation occurs.

After the pin 5b contacts the rear edge of the long hole 7a, while the pin 5b is further pushed to the rear side to the position corresponding to the wide position by pushing the rear edge of the long hole 7a, the pin 5b is held in the long hole 7a.
a is continuously pushed rearward on the rear side, and the second lever 7 is rotated counterclockwise in FIG. 1 around the hole 7b by an angle corresponding to the amount pressed during that time. The variable-magnification lens holding frame 9 of the finder optical system is moved in the optical axis direction, and the image magnification of the finder continuously changes to the wide side in accordance with the change in magnification of the photographing optical system. Thereafter, when the follower pin 2a of the first lens holding cylinder 2 reaches the wide position of the cam groove 1c and further moves near the end position of the cam groove 1c by the focus adjustment, the moving direction of the cam plate 1 is reversed to hold the second lens group. The tube 3 and the lens barrel 4 are extended to the tele side. At this time, since the second lever 7 is pinched by the spring pressing member 8 and does not move because a slight braking force is applied, the pin 5b is separated from the rear end edge of the square hole 7a and the front end of the hole 7a. Move to a nearby location. Then, when the pin 5b moves to near the front edge of the square hole 7a, the follower pin 2a reaches the focus adjustment standby position 1d of the groove 1b of the cam plate 1, and at the same time, the movement of the cam plate 1 stops, thereby the wide state. Is completed.

Thereafter, in the focusing operation in the wide state, the cam plate 1 moves again in the direction of the thick arrow in FIG. 2, but in this case, the pin 5b is moved to the elongated hole 7a.
The pin 5b is moved to the rear side only within the area inside the
Since the trailing edge of “a” is not pushed, even if the first lever 5 rotates, the second lever 7 does not rotate. Therefore,
During the focusing operation, the zoom operation of the finder does not occur.

FIG. 2B shows the movement of the pin 5b when the photographing optical system is moved to the middle position (middle focal length) and the magnification is changed.

When the photographing optical system is moved from the wide side to the middle position (middle focal length), the pin 5b pushes the front edge of the square hole 7a to rotate the second lever 7 as shown by a thin straight arrow. To continuously change the image magnification of the finder, the follower pin 2a moves to the focus adjustment standby position 1d of the groove 1b of the cam plate 1 and stops there.

Thereafter, during the focusing operation in the middle position, the second lever 7 is moved only by moving the pin 5b backward within the range inside the elongated hole 7a, as in the focusing operation in the wide state described above. Therefore, the zooming operation of the finder is not performed.

When the photographing optical system is moved from the telephoto side to the middle position, the pin 5b pushes the rear edge of the elongated hole 7a to rotate the lever 7 in the same manner as the above-described movement to the wide position. After continuously changing the image magnification of the finder, the lens returns to the telephoto side by the amount of focus and comes to the focus adjustment standby position of the middle position. In this case as well, when the moving direction of the pin 5b is reversed, the lever 7 does not follow the forward movement of the pin 5b because the lever 7 is applied with a light braking force by the spring pressing member 8, as described above. Then, the same focusing operation as described above is performed, but the finder does not change at that time.

FIG. 2 (c) on the right side of FIG. 2 shows a pin 5 for moving the photographing optical system to a telephoto position (long focal length).
This shows the movement of b.

Since the lens is always moved from the wide side when moving to the tele position, the pin 5b moves forward from the position shown by pushing the front edge of the long hole 7a, and the image magnification of the finder is continuously increased. The follower pin 2a stops at the focus adjustment standby position 1d of the groove 1b of the cam plate 1 when the optical system changes to the tele position. Thereafter, during the focusing operation in the telephoto state, similarly to the above, the pin 5b only moves backward within the range inside the elongated hole 7a of the lever 7, and the lever 7 does not move, so that the finder remains stopped.

As described above, in the configuration of the present embodiment, the finder continuously performs the magnification operation when the photographing optical system is changed in magnification, and the finder operates when the photographing optical system performs the focus adjustment operation. As a result, there is no danger that the camera user watching the viewfinder will feel uncomfortable or unnatural.

In this embodiment, the focusing operation has been described as the direction in which the lens barrel is retracted. However, it is obvious that the focusing operation may be in the direction in which the lens barrel is extended. Are all reversed.

FIG. 3 is a schematic diagram showing a part of the configuration of the control system of the camera according to the present embodiment.

Referring to FIG. 1, reference numeral 100 denotes a microcomputer as a control means of the camera;
Is a motor for driving the cam plate 1, 102 is a motor driving circuit for driving the motor 101, 103 is a known distance measuring circuit (including a distance measuring sensor or the like) mounted on the camera, and 104 is a cam. A position detector for detecting the movement position of the plate 1, 105 is a known zoom switch provided on the camera, 106 is a known release switch that is turned on by a shutter release member provided on the camera, 106 is A known photographing circuit (including a photometric sensor, a shutter, and the like) for performing a photographing operation.

FIG. 4 is a flowchart of the control operation executed by the microcomputer 100. The function and control operation of the camera will be described below with reference to FIGS.

(Step # 1) It is detected whether or not the zoom switch 105 is turned on.
If not, repeat step # 1.

(Step # 2) It is detected whether or not the zoom switch 105 has been operated to the tele side. If the zoom switch 105 has been operated to the tele side, the process proceeds to step # 3. Since the operation has been performed, the process proceeds to step # 18.

(Step # 3) The cam plate 1 is already in the tele-position focus adjustment standby position 1d by the position detector 104.
Is determined, the process proceeds to step # 9 if it is at the focus adjustment standby position 1d of the tele position, and otherwise proceeds to step # 4.

(Step # 4) The photographing optical system is moved in the extending direction by rotating the motor 101 forward (moving the cam plate 1 in the direction of arrow f in FIG. 1) via the motor drive circuit 102.

(Step # 5) It is detected whether or not the zoom switch 105 is off. If the zoom switch 105 is off, the process proceeds to step # 6. If not, the process proceeds to step # 7.

(Step # 6) When the position detector 104 detects that the follower pin 2a of the first lens holding barrel 2 has reached the focus adjustment standby position 1d of the cam groove 1b of the cam plate 1, the process proceeds to step # 8.

(Step # 7) It is determined by the position detector 104 whether the cam plate 1 has reached the focus adjustment standby position at the tele position. If it is determined that the cam plate 1 has reached the focus adjustment standby position at the tele position, The process proceeds to step # 8, and if not, returns to step # 5.

(Step # 8) The motor 101 is stopped, and the process proceeds to step # 9.

(Step # 9) Release switch 106
Is turned on, and if it is turned on, the process proceeds to step # 10.

(Step # 10) The distance measuring circuit 103 performs distance measurement.

(Step # 11) Motor drive circuit 102
To rotate the motor 101 in the reverse direction to move the cam plate 1 in the direction of arrow g (the direction in which the photographing optical system is retracted).

(Step # 12) If it is determined from the output of the position detector 104 that the cam plate 1 has reached the position corresponding to the output of the distance measuring circuit 103, the flow proceeds to step # 13.

(Step # 13) The motor 101 is stopped, and the process proceeds to step # 19.

(Step # 14) The photographing operation is performed by the photographing circuit 105, and when the photographing operation is completed, step # 1 is performed.
Go to 5.

(Step # 15) Motor drive circuit 102
, The motor 101 is rotated forward to return the cam plate 1 in the direction of arrow f.

(Step # 16) When the position detector 104 detects that the cam plate 1 has reached the focus adjustment standby position before moving in step # 11, the process proceeds to step # 17.

(Step # 17) The motor 101 is stopped, and the process returns to step # 1.

(Step # 18) The position detector 104 determines whether or not the cam plate 1 is already at the wide-position focus adjustment standby position 1d. If the cam plate 1 is at the wide-position focus adjustment standby position 1d, the process proceeds to step # 9. Proceed, otherwise proceed to Step # 19.

(Step # 19) Motor drive circuit 102
By rotating the motor 101 in the reverse direction (moving the cam plate 1 in the direction of arrow g in FIG. 1), the photographing optical system is moved in the retraction direction.

(Step # 20) Zoom switch 105
It is detected whether or not is turned off. If it is turned off, the process proceeds to step # 21. If not, step # 2 is performed.
Go to 5.

(Step # 21) Focus adjustment standby position 1d of cam groove 1b of cam plate 1 based on the output of position detector 104
The follower pin 2a of the first lens holding barrel 2 reaches
If it is further detected that the focus adjustment has been made, step # 2
Proceed to 3.

(Step # 22) It is determined by the position detector 104 whether the cam plate 1 has reached the wide-angle focus adjustment standby position and has been further moved by the focus adjustment, and it has been determined that the cam plate 1 has been moved by the focus adjustment. If so, proceed to step # 23,
If not, the process returns to step # 20.

(Step # 23) The motor 101 is rotated forward to move the cam plate 1 in the direction of arrow f (the direction in which the photographic optical system is extended).

(Step # 24) The focus adjustment standby position 1d of the cam groove 1b of the cam plate 1 based on the output of the position detector 104
When it is detected that the follower pin 2a of the first-group lens holding barrel 2 has arrived at step # 25, the process proceeds to step # 25.

(Step # 25) The motor 101 is stopped, and the process returns to step # 9.

Thereafter, the operation shifts from step # 9 to step # 17 in the same manner as described above.

With the above operation, the pin 5b of the first lever 5
Moves as shown in FIG.

<Embodiment 2> FIG. 3 shows the configuration of a second embodiment of the present invention. This embodiment is different from the first embodiment in that a gear mechanism is used instead of a lever as a linking means between the photographing optical system and the finder. In the following, the same components as those of the first embodiment are denoted by the same reference numerals, and only the components different from those of the first embodiment will be described.

A rack 24a extending in parallel with the optical axis is fixed to the lens barrel 24 that moves integrally with the first lens holding barrel 2, and a gear 25 meshing with the rack 24a is fixed to a structural member (not shown). It is supported so that it can rotate only at the position. In the vicinity of the outer peripheral edge of one side of the gear 25, a pin 25a parallel to the axis of the gear is protrudingly provided, and the gear 2 adjacent to the gear 25 and coaxially separated from the gear 25 is arranged.
6, an arc-shaped groove 26a into which the pin 25a is inserted is formed. The circumferential length of the groove 26a is the same as the length of the long side of the square hole 7a of the lever 7 of the first embodiment, and is a predetermined length so that the movement of the photographing optical system in the optical axis direction is not transmitted to the finder. Has become.

The gear 27 meshing with the gear 26 is fixed to the same shaft 30 as one bevel gear 29 of the direction changing mechanism 28, and the other bevel gear 31 of the direction changing mechanism 28 has the same shaft as the driving gear 33 of the cam plate 34. 32. The drive gear 33 meshes with a rack 34b formed on the cam plate 34. When the gear 33 is rotated, the cam plate 34 is moved in a direction perpendicular to the optical axis. The cam plate 334 is formed with a cam groove 34a for controlling the position of the variable magnification lens holding frame 9 of the finder.
The follower pin 9a of the variable magnification lens holding frame 9 of the finder is inserted into the finder 4a so as to be relatively slidable. Cam plate 34
Is moved only when driven from the gear 33,
A leaf spring-shaped friction member 35 is pressed.

In this embodiment, the function of the linking means between the photographing optical system and the finder is the same as that of the first embodiment. That is, when the first lens holding barrel 2 and the second lens holding barrel 3 are moved by focusing by the cam grooves 1A and 1B of the cam plate 1, the rotation of the gear 25 is
Not transmitted to 6. When the first lens group holding cylinder 2 and the second lens group holding cylinder 3 move to, for example, a wide position, the operation described with reference to FIG. 2 occurs in the finder.
The viewfinder display image changes continuously.

It is obvious that the linking means having a function such as the combination of the pin 25a and the groove 26a may be formed as an independent member.

(Correspondence between Invention and Embodiment) In the above embodiment, the first lever 5, the fixing pin 6, the second lever 7, the gears 25, 26, 27, 33, the direction changer 28,
The bevel gears 29, 31, flap 30, and cam plate 34 are the linking means of the present invention, and the cam plate 1, the first lens holding cylinder 2, the second lens holding cylinder 3, and the lens barrels 4 and 24 are the imaging lens of the present invention. In the optical system or the photographing optical system, the variable magnification lens holding frame 9, the finder objective lens 11, the prism 12, and the finder eyepiece 13 are provided in the finder of the present invention, and the square hole 7a and the groove 26a are provided in the space forming section of the present invention. The spring clamping member 8 and the friction member 35 are the holding means of the present invention, the microcomputer 100, the motor 101, and the motor drive circuit 102 are the driving means of the present invention, the motor 101 is the electric motor of the present invention, and the microcomputer 100 is the present invention. , The position detector 104 serves as the position determining means of the present invention, the cam plate 1 serves as the guide means of the present invention, and the first lens holding barrel 2 or the second lens holding barrel 3 serves as the imaging optics of the present invention. Each corresponds to a unit

The correspondence between each configuration of the embodiment and each configuration of the present invention has been described above. However, the present invention is not limited to the configuration of the embodiment, and the functions or implementations described in the claims are not limited. It goes without saying that any configuration may be used as long as the function of the configuration of the embodiment can be achieved.

For example, in the above embodiment, the focus adjustment operation is always started from the focus adjustment standby position, but may be started from an intermediate position.
Further, it is needless to say that the zooming and the focusing operation of the photographing optical system are not limited to those performed by the cam configuration as shown in the above-described embodiment, and the present invention can be applied to any type.

Further, the present invention may be applied to a case where the whole or a part of the configuration of the claims or the embodiments forms one device or is combined with another device. It may be such as an element constituting a device.

The present invention relates to various types of cameras such as a single-lens reflex camera, a lens shutter camera, and a video camera.
Further, the present invention can be applied not only to a camera but also to optical devices and other devices, and further to devices applied to those cameras, optical devices and other devices, or elements constituting these devices.

[0081]

As described above, according to the present invention, it is possible to provide an optical device which does not give an unnatural or unnatural feeling to a user looking through a finder.

Further, according to the present invention, during the focus adjustment operation according to the distance of the object of the imaging optical system, the focal point during the magnification operation of the imaging optical system is not performed without changing the viewfinder. It is possible to provide an optical device that causes the finder to change the magnification during the adjustment operation and does not cause unnaturalness or unnaturalness to a user looking through the finder.

Further, according to the present invention, during the focus adjustment operation according to the distance of the object of the imaging optical system, the focal point during the magnification operation of the imaging optical system is not required without changing the magnification of the finder. In the adjustment operation, the finder is continuously operated to change the magnification in accordance with the magnification operation and the focus adjustment operation of the imaging optical system, so that an optical device that does not give unnaturalness or unnaturalness to a user looking through the finder can be provided. Things.

Further, according to the present invention, the zooming guide area and the focus adjusting guide area are provided alternately, and the imaging optical unit is guided along the zooming guide area and the focus adjusting guide area. In the optical device that causes the imaging optical unit to perform a magnification operation and a focus adjustment operation, the imaging optical unit is guided by the focus adjustment guide for the focus adjustment operation according to the distance of the object. When the imaging optical unit is guided by the focus adjusting guide to change the magnification without changing the magnification of the viewfinder, the magnification of the viewfinder is changed so that the user looking through the viewfinder cannot perform zooming. It is possible to provide an optical device that does not give a natural feeling or an unnatural feeling.

Further, according to the present invention, the above apparatus can be constructed simply and inexpensively.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a part of a mechanical structure of an optical device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining a relative positional relationship between a pin 5b of a lever 5 and a hole 7a of a second lever 7 that are linked to an imaging optical system (photographing optical system) of the optical device of FIG. a) shows a case where the imaging optical system moves to a wide position,
(B) shows the case of moving to the middle position,
(C) shows the case of moving to the tele position.

FIG. 3 is a schematic diagram showing a configuration of a part of an electrical control system of the optical device in FIG. 1;

FIG. 4 is a flowchart of the microcomputer 100 shown in FIG. 3;

FIG. 5 is an exploded perspective view of a part of a mechanical structure of an optical device according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cam plate 2 first lens holding cylinder 3 second lens holding cylinder 4, 24 lens barrel 5 first lever 6 fixing pin 7 second lever 7 a square hole 8 spring pressing member 9 variable magnification lens holding frame 1 A, 1 B, 7 c Cam groove 1b Focus adjusting groove 1c Variable power groove 2a, 3a, 9a Follower pin 11 Finder objective lens 12 Prism 13 Finder eyepiece 24a Rack 25, 26, 27, 33 Gear 26a Groove 28 Direction change mechanism 29, 31 Bevel gear 30 axis 34 cam plate 34a cam groove 34b rack 35 friction member 100 microcomputer 101 motor 102 motor drive circuit 104 position detector

Claims (44)

(57) [Claims] 1. A finder that operates in conjunction with movement of an imaging optical system and performs a focus adjustment operation in a direction different from the movement of the imaging optical system after the movement. An optical device comprising a linking means for interrupting the linking of the optical device. 2. A space for operating a finder in conjunction with movement of an imaging optical system and disconnecting the finder for movement in a direction different from the movement of the imaging optical system after the movement. An optical apparatus, comprising: a linking unit having a forming unit; and a holding unit for holding the finder so as not to operate while the finder is disconnected from the imaging optical system. 3. The optical device according to claim 2, wherein the holding unit applies friction so that the finder does not move. 4. The optical device according to claim 1, wherein the optical device is a camera. 5. The optical device according to claim 1, wherein the imaging optical system is a photographing optical system. 6. The optical device according to claim 1, wherein the optical device has the image forming optical system. 7. The optical device according to claim 6, wherein the imaging optical system performs a zooming operation when moving in a state where the image forming optical system is linked to the finder. 8. The optical apparatus according to claim 6, wherein the imaging optical system performs a focus adjustment operation and a zooming operation when moving in a state where the imaging optical system is linked with the finder. 9. The image forming optical system performs a first zooming operation in a process of moving in a state where the image forming optical system is linked with the finder.
7. The optical device according to claim 6, wherein the focus adjustment operation and the second zooming operation are sequentially performed. 10. The optical device according to claim 1, wherein the optical device includes the finder. 11. The optical device according to claim 10, wherein the finder changes a magnification when operating in conjunction with the imaging optical system. 12. The optical device according to claim 10, wherein the finder continuously changes the magnification when operating in conjunction with the imaging optical system. 13. The image forming optical system according to claim 13, wherein the image forming optical system further moves in the same direction after moving the image forming optical system in a direction in which the image forming optical system is disconnected from the finder. 13. The optical device according to claim 1, wherein the finder is linked to a movement. 14. A driving means for moving the imaging optical system in a first direction by linking the finder and then moving the imaging optical system in a second direction to break the link with the finder. The optical device according to claim 1, wherein: 15. The optical device according to claim 14, wherein the driving unit has an electric motor. 16. The optical device according to claim 1, further comprising: a position determining unit configured to determine a moving position of the image forming optical system, wherein the driving unit controls the position of the image forming optical system according to a determination result of the position determining unit. The optical device according to claim 14, further comprising control means for controlling movement. 17. After moving the imaging optical system in a first direction by linking the finder, the imaging optical system is moved in a second direction to break the link with the finder. The optical device according to claim 1, further comprising a driving unit configured to move the imaging optical system in the first direction in a state where the imaging optical system is disconnected from the finder. 18. After moving the image forming optical system in a first direction by linking the finder, the image forming optical system is moved in a second direction to break the link with the finder and to move the object. The optical device according to claim 1, further comprising a driving unit configured to perform a focus adjustment operation according to a distance of an object. 19. After moving the image forming optical system in a first direction by linking the finder, the image forming optical system is moved in a second direction to break the link with the view finder and to move the object. A drive unit for performing a focus adjustment operation according to a distance to an object, and moving the imaging optical system to a predetermined position in the first direction in a state where the imaging optical system is disconnected from the finder after the photographing operation is completed. 2. The method according to claim 1, wherein
4. The optical device according to any one of 3. 20. After moving the imaging optical system by linking the finder in a first direction, moving the imaging optical system in a second direction to disconnect the link with the finder. 2. The image forming apparatus according to claim 1, further comprising: a driving unit configured to move the image forming optical system in the first direction in a state where the image forming optical system is disconnected from the finder, and to perform a focus adjustment operation according to a distance of the target object. 14. The optical device according to any one of items 13 to 13. 21. After moving the image forming optical system in a first direction by linking the finder, the image forming optical system is moved in a second direction to break the link with the finder. The image forming optical system is moved in the first direction in a state where the image forming optical system is disconnected from the viewfinder to perform a focus adjustment operation according to a distance of an object. The optical device according to claim 1, further comprising a driving unit configured to move the lens to a predetermined position in the second direction in a state where the link with the finder is disconnected. 22. An image forming apparatus according to claim 19, wherein the image forming optical unit is provided alternately with a zooming guide area and a focus adjusting guide area, and the imaging optical unit is guided along the zooming guide area and the focus adjusting guide area. Guiding means for causing the optical unit to perform a zooming operation and a focus adjusting operation; and linking the imaging optical unit to being guided in one direction along the zooming guide area and the focus adjusting guide area of the guiding means. To operate the finder, and after the imaging optical unit is guided in one direction along the zooming guide area and the focus adjusting guide area of the guide means, furthermore, the focus adjusting guide area of the guide means. And a linking means for disconnecting the finder from being guided along a direction different from the one direction. 23. The linking means continuously links the finder with the imaging optical unit being guided in one direction along a variable power guide area and a focus adjustment guide area of the guide means. The optical device according to claim 22, wherein the optical device is operated. 24. The linking means changes the magnification of the finder in conjunction with the imaging optical unit being guided in one direction along a zooming guide area and a focus adjusting guide area of the guide means. 23. Operate according to claim 22.
An optical device according to claim 1. 25. The linking means continuously links the finder in conjunction with the imaging optical unit being guided in one direction along a guide area for zooming and a guide area for focus adjustment of the guide means. 23. The optical device according to claim 22, wherein the variable magnification operation is performed. 26. The linking means, further comprising: after the imaging optical unit has been guided in one direction along the zooming guide area and the focus adjusting guide area of the guide means, further comprising a focus adjusting unit. 3. The apparatus according to claim 2, further comprising a non-operating unit that does not change the magnification of the finder when the finder is guided in a direction different from the one direction along the guide area.
The optical device according to any one of 2 to 25. 27. The optical apparatus according to claim 26, wherein said inoperative means has holding means for holding said finder so that said finder does not operate. 28. The optical device according to claim 27, wherein the holding device applies friction so that the finder does not move. 29. After the imaging optical unit is guided in one direction along the zooming guide area and the focus adjusting guide area of the guide means, further along the focus adjusting guide area of the guide means. The optical device according to any one of claims 22 to 28, further comprising control means for performing a focus adjustment operation according to a distance of the target object when guided in a direction different from the one direction. 30. A control device for setting a desired magnification when the imaging optical unit is guided in one direction along a zooming guide area and a focus adjusting guide area of the guide means. An optical device according to any one of claims 22 to 28. 31. An optical device according to claim 22, wherein said linking means has a space forming portion for cutting off linking with said finder. 32. The linking means operates the finder in conjunction with the imaging optical unit being guided in one direction along the variable power guide area and the focus adjustment guide area of the guide means. After that, after the imaging optical unit is disconnected from the finder for being guided in a predetermined section in a direction different from the one direction along the focus adjusting guide area of the guide means, the image forming optical unit is further stopped. 23. The finder according to claim 22, wherein said finder is linked again when the image optical unit is guided in a direction different from said one direction along the focus adjusting guide area of said guide means.
32. The optical device according to any one of 31. 33. After the imaging optical unit is driven in one direction along a zooming guide area and a focus adjusting guide area of the guide means, and further along the focus adjusting guide area of the guide means. The optical device according to any one of claims 22 to 31, further comprising a driving unit that drives in a direction different from one direction. 34. The optical device according to claim 33, wherein said driving means has an electric motor. 35. The optical device according to claim 26, further comprising: a position determining unit configured to determine a guiding position of the imaging optical unit by the guiding unit; 35. The optical device according to claim 33, further comprising control means for controlling the optical device. 36. After the imaging optical unit is driven in one direction along a zooming guide area and a focus adjusting guide area of the guide means, the driving unit further moves along the focus adjusting guide area of the guide means. Driving means for driving in a direction different from the one direction to drive the imaging optical unit in the one direction along the focus adjusting guide area of the guide means in a state where the imaging optical unit is disconnected from the finder. The optical device according to any one of claims 22 to 31, wherein 37. After the imaging optical unit is driven in one direction along the zooming guide area and the focus adjusting guide area of the guide means, and further along the focus adjusting guide area of the guide means. The optical device according to any one of claims 22 to 31, further comprising a driving unit that drives in a direction different from one direction and performs a focus adjustment operation according to a distance of the object. 38. The image forming optical unit is driven in one direction along a zooming guide area and a focus adjusting guide area of the guide means, and then is moved along the focus adjusting guide area of the guide means. Driving in a direction different from the direction to perform a focus adjustment operation according to the distance of the object, and after the end of the shooting operation,
23. A driving device for driving the imaging optical unit to a predetermined position in the one direction along a focus adjustment guide area of the guide device in a state where the imaging optical unit is disconnected from the finder. 32. The optical device according to any one of -31. 39. The image forming optical unit is driven in one direction along a zooming guide area and a focus adjusting guide area of the guide means, and then is moved along the focus adjusting guide area of the guide means. Drive in a direction different from the direction, and further drive the image forming optical unit in the one direction along the focus adjustment guide area of the guide means in a state in which the link with the viewfinder is cut off, thereby increasing the distance of the object. The optical device according to any one of claims 22 to 31, further comprising a driving unit that performs a corresponding focus adjustment operation. 40. After the imaging optical unit is driven in one direction along the zooming guide area and the focus adjusting guide area of the guide means, and further along the focus adjusting guide area of the guide means. Driving in a direction different from the one direction, driving the imaging optical unit in the one direction along the focus adjustment guide area of the guide means in a state where the linking with the finder is cut off, and moving the imaging optical unit to the distance of the object. Perform a corresponding focus adjustment operation, and further, after the photographing operation, in a state different from the one direction along the focus adjustment guide area of the guide means in a state where the imaging optical unit is disconnected from the finder. The optical device according to any one of claims 22 to 31, further comprising a driving unit configured to drive the optical device to a predetermined position. 41. The optical device according to claim 22, wherein the optical device is a camera. 42. The optical device according to claim 22, wherein the imaging optical unit is a photographic lens. 43. The optical device according to claim 22, wherein the optical device includes the imaging optical unit. 44. The optical device according to claim 22, wherein the optical device includes the finder.