JPH0627363A - Optical equipment - Google Patents

Abstract

PURPOSE:To move an optical system in a desired direction with a simple opera tion, surely, and without performing a mis-operation when the moving direction of the optical system is different from that of a focusing ring or zooming ring in every optical equipment in the optical equipment provided with an optical member driving device of a power manipulate system. CONSTITUTION:When the focusing ring 4 Is permitted to move in a direction of optical axis differently from the rotating direction for focusing and a switch 7 for direction decision is turned on/off and the focusing ring 4 is moved in a direction of arrowhead C, a direction display part 5B is displayed on the display window 6 of the ring 4, which shows the fact that the optical system can be moved freely by rotating the ring 4 in a direction of arrowhead B. Also, a direction display part 5A is displayed by moving the ring 4 in a direction of arrowhead D in the direction of optical axis, and the fact that the optical system can be moved led to a close range side is shown by rotating the ring 4 in the direction of arrowhead B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention converts a manual focusing operation or a manual magnification changing operation into an electric signal or the like, and controls a power source such as a motor by the electric signal so as to use a focusing lens or a variable magnification. The present invention relates to an optical device having a power manipulating type optical member driving device configured to move a lens to an appropriate position.

[0002]

2. Description of the Related Art Conventionally, a focus ring or a zoom ring is manually rotated to convert it into an electric signal, and a power source is driven by the electric signal to move a focusing lens or a zoom lens. Interchangeable lenses for single-lens reflex cameras equipped with a power focus device and a power zoom device are commercially available.

In such interchangeable lenses, the direction of rotation of the focus ring or zoom ring and the direction of movement of the lenses differ, for example, for each manufacturer of interchangeable lenses.
In order to solve this problem, it has been proposed to provide a simple changeover switch separately to change the moving direction of the lens with respect to the rotating direction of the rotary ring so that the lens can be moved appropriately in the direction desired by the photographer.

[0004]

However, it is necessary to operate a change-over switch provided separately for each interchangeable lens, and it may be easy to use because there is a possibility that the changeover may be forgotten or the operation of the switch may be lost. It cannot be said that the lens actually moves in the opposite direction even if it is operated in the desired direction.

An object of the present invention is to solve such a problem, to selectively confirm the operation direction by visual observation, and to eliminate the need for operating a switch separately, so that a device such as a camera to be mounted. It is to provide an optical device such as a lens barrel, which is adapted to and can be used by a user without erroneous operation.

[0006]

The structure of an optical device that achieves the object of the present invention is as set forth in the claims. Specifically, a rotary operation member such as a focus ring or a zoom ring is used. Display means for converting (reversing) a predetermined interlocking direction by not only rotating but also moving horizontally with respect to the optical axis of the lens, and displaying the rotating direction of the ring and the moving direction of the lens in accordance with the conversion. Can also be converted at the same time, and the user's erroneous operation can be prevented.

[0007]

【Example】

[Embodiment 1] FIGS. 1 to 3 show Embodiment 1 of an optical apparatus according to the present invention.

Reference numeral 1 is a focusing lens unit for focusing (hereinafter referred to as a lens unit), 2 is a distance display printed on the lens unit 1, and 3 is a lens body which is a fixed portion of the lens.

Reference numeral 4 denotes a focus ring for instructing a driving direction and a driving amount of the lens unit 1, which is rotatable for focusing and movable in a direction of an arrow 7 along the optical axis. The ring 4 can be used as a direction change switch.

Reference numeral 5A denotes a first direction display portion which indicates the moving direction of the lens unit 1 with respect to the rotation direction displayed on the front portion of the lens body 3 by printing or the like, and 5B is juxtaposed behind the first direction display portion 5A. In the second direction display section showing the moving direction of the lens unit 1 with respect to the rotation direction displayed by printing or the like, the display forms of these bidirectional display sections are reversed in the rotation direction.

Reference numeral 6 denotes a display window in which a part of the focus ring 4 is cut out so that the directional display portions 5A and 5B can be selectively viewed. In the state shown in FIG. 1, the second directional display portion 5B is It can be observed, and when the focus ring 4 is slid forward, the first direction display portion 5A can be observed.

That is, when the focus ring 4 is set on the C side, which is horizontal to the optical axis of the lens, the lens unit 1 with respect to the rotation direction of the focus ring 4 is displayed on the display window 6.
Is displayed, and when the focus ring 4 is turned to the A side, the lens unit 1 is driven in the infinite direction, and when it is turned to the B side, the lens unit 1 is driven in the close-up direction.

When the focus ring 4 is set to the D side, at the same time, the moving direction of the lens unit 1 with respect to the rotation direction of the focus ring 4 is displayed opposite to the A side, and the focus ring 4 is turned to the A side. The lens unit 1 is driven in the closest direction, and when it is turned to the B side, it is driven in the infinite direction.

The range of movement when the focus ring 4 is moved in the front-back direction to change the direction is the stopper 32.
The relationship between the moving direction of the lens unit 1 and the rotating direction of the focus ring 4 is determined by the switch 15.

Therefore, according to the present embodiment, by moving the focus ring 4 in the horizontal direction with respect to the optical axis, the contents displayed on the display window 6 in appearance are displayed on the direction display portions 5A, 5B.
The lens unit 1 is driven when the focus ring 4 is rotated in accordance with the direction displayed on the display window 6, so that the manual operation of focus can be performed by the user without any doubt.

FIG. 2 is a block diagram showing the system configuration of this embodiment.

Reference numeral 1 is a lens unit for adjusting the binding, 4 is a focus ring for instructing the drive direction and drive amount of the lens unit 1, and 10 is a focus ring 4.
An encoder for detecting the amount of rotation and the direction of rotation when is rotated, 11 is an FV converter for converting the speed output from the encoder 10 into a voltage, and 12 is a voltage output of the FV converter 11 is converted into a digital output. A / D converter for controlling, a microcomputer 13 for controlling various lenses, a rotational direction detection circuit 14 for detecting the rotational direction from the output of the encoder 10, a horizontal direction 15 for the focus ring 4 and the optical axis direction. A rotation direction changeover switch for determining the driving direction of the lens unit 1 by moving the lens unit 1, 16 is a motor unit for driving the lens unit 1, 17 is a motor unit 16 for detecting the rotation amount and rotation speed of the motor unit 16. The encoder, 18 is a drive circuit for driving the motor unit 16.

FIG. 5 shows a flow chart in consideration of the function of each unit described in the block diagram shown in FIG.

In the figure, when the focus ring 4 is rotated, the directly connected encoder 10 also rotates and its output is distributed to the FV conversion circuit 11 and the rotation direction detection circuit 14. Next, the FV conversion circuit 11 converts the frequency output of the encoder 10 into a voltage output and outputs the voltage output to the A / D converter 12. The A / D converter 12 further converts it into a digital output and sends it to the microcomputer 13. The microcomputer 13 detects that the output of the A / D converter 12 has changed (101), and immediately calculates the difference or ratio with the previous voltage (102) to obtain ΔV. ΔV is calculated by a certain function value (f), and the drive amount Y of the lens unit 1 is derived (103). Next, the rotation direction detection circuit 14 detects the rotation direction of the focus ring 4 (10
4) Further, the driving direction of the lens unit 1 is detected by the rotation direction changeover switch 15 (105), and the driving direction of the lens unit 1 is determined from the state of each switch (1).
06).

Next, the driving direction of the lens unit 1 is judged (107), the drive circuit 18 is driven so as to drive only the driving amount Y, and the lens unit 1 is driven via the motor 16.
Is driven (108, 109). At the same time when the motor 16 rotates, the encoder 17 also rotates, and the drive amount is changed by the microcomputer
Send to 3. The microcomputer 13 compares the drive amount Y and ends the drive when the drive amount Y becomes the same value (110). When driving is completed, start from the beginning.

When the rotation direction changeover switch 15 is switched, the driving direction of the lens unit 1 is switched from infinity to close proximity or close to infinity.

[Second Embodiment] FIG. 4 shows a second embodiment.

Although the first embodiment has been described with respect to the direction switching for focusing, the present embodiment has a configuration for the direction switching for zooming. In this case as well, the same operation as in the first embodiment can be performed. Explained.

In FIG. 4, reference numeral 41 denotes a zoom lens unit (hereinafter referred to as a zoom unit) for changing the magnification.
2 is a focal length display displayed on the zoom unit 41 by printing or the like, 43 is a lens body that is a fixed part of the lens, 44 is a zoom ring for instructing the drive direction and drive amount of the zoom unit 41, and 45A and 45B. Is a direction display portion showing the moving direction of the zoom unit 41 with respect to the rotation direction displayed on the lens body 43 by printing or the like. The display forms of both direction display portions 45A and 45B are opposite in the rotation direction.

Reference numeral 46 is a display window in which the zoom ring 44 is cut out so that the direction display portions 45A and 45B can be selectively seen from the outside. Reference numeral 47 is a switching direction when the zoom ring 44 is used as a switch. Other operations, switching methods, and the like are similar to those of the focus device according to the first embodiment described above, and thus description thereof will be omitted.

That is, also in this embodiment, the rotation direction for zoom operation can be selected, and the zoom lens can be moved to the wide-angle side or the telephoto side without erroneous operation.

[0027]

As described above, in the power focus device or the power zoom device, when the rotary operation member such as the focus ring or the zoom ring is rotationally operated, the focusing lens unit or the variable magnification lens unit or the like is optically operated. In an optical device that can switch the driving direction of the system, the interchangeable lens can be clearly used to display the moving direction of the lens with respect to the rotating direction of the ring, instead of the simple switch, and the user can use it without erroneous operation. An optical device such as a camera can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing Embodiment 1 of an optical device according to the present invention.

FIG. 2 is a block diagram showing the outline of the system of the first embodiment.

FIG. 3 is a sectional view of FIG.

FIG. 4 is a schematic diagram showing a second embodiment.

5 is a flowchart illustrating the operation of the block diagram of FIG.

[Explanation of Codes] 1 ... Focusing lens unit, 2 ... Distance display, 3 ... Lens body, 4 ... Focus ring, 5 ... Direction display section, 6 ... Display window, 32 ... Stopper, 38 ... Changeover switch, 4
1 ... Lens unit for zooming, 42 ... Focal length display, 4
... Lens body, 44 ... Zoom ring, 45 ... Direction display section, 46 ... Display window

Claims (1)

[Claims] 1. An optical device that electrically converts operation information of a rotation amount and a rotation direction of a manually operated rotation operation member and automatically drives an optical member by a drive means based on the operation information. A moving direction determining means for selectively determining a moving direction of the optical member by moving the member in a direction different from the rotation direction, and an operating direction display section for displaying an operating direction according to the determination of the moving direction determining means. And an operation device for displaying the operation direction display unit in accordance with the selected movement direction at the same time as the operation of the movement direction determination unit by the operation of the rotation operation member.