JPH0774991A - Image pickup device - Google Patents

Abstract

PURPOSE:To obtain an image pickup device capable of quickly and accurately reproducing a required field angle. CONSTITUTION:This image pickup device is provided with a photographing head 13 including an image pickup element for photoelectrically converting the image of a subject 11, a zoom lens 19 for forming an image of the subject 11 on the image pickup element and a driving means for variably controlling the focal distance of the lens 19, a stage 12 for loading the subject 11, a column 14 for supporting the head 13 on the upper part of the stage 12, a member 30 to be driven when the focal distance of the lens 19 is changed to the telephoto side, and a member 31 to be driven when the lens 19 is changed to the wide side. A required field angle can be selected by simultaneously driving both of the operation member 30 and a storage reproducing operation member 32 and the required field angle can be quickly and accurately reproduced without requiring visual check by simultaneously driving both the members 31, 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup apparatus, and more specifically, an image of a subject placed on a stage is formed on an image pickup element by a taking lens, and the image is photoelectrically converted by the image pickup element. The present invention relates to an image pickup device which takes out as a signal and reproduces an image by video image reproducing means such as a monitor television.

[0002]

2. Description of the Related Art As one type of image pickup apparatus of this type, Japanese Patent Laid-Open No. 3-171980 discloses an image pickup device for photoelectrically converting an image of a subject, a zoom lens for forming an image of the subject on the image pickup device, and A photographing head having driving means for variably adjusting the focal length of the lens, a stage for mounting a subject, a support for supporting the photographing head above the stage, and a case where the focal length of the zoom lens is changed to the tele side. There is disclosed an imaging device including a tele-side operation member that is operated in a wide range and a wide-side operation member that is operated when changing the zoom lens to a wide side. According to such an image pickup device, the focal length of the zoom lens can be adjusted by operating the telescopic side operation member or the wide side operation member, and the subject placed on the stage can be reproduced at a desired angle of view.

[0003]

By the way, in order to improve the usability of this type of apparatus, a function capable of rapidly and accurately reproducing the previously reproduced desired angle of view is desired. However, according to the conventional imaging device described above,
In order to reproduce the desired angle of view that was previously adjusted, it is necessary to visually check the zoom ring scale and adjust the amount of operation of the tele-side operation member or the wide-side operation member. Is extremely difficult to reproduce. The present invention has been made in view of the above problems, and an object of the present invention is to provide an imaging device capable of quickly and accurately reproducing a desired angle of view.

[0004]

SUMMARY OF THE INVENTION The present invention comprises an image pickup device for photoelectrically converting an image of a subject, a zoom lens for forming an image of the subject on the image pickup device, and drive means for variably adjusting the focal length of the lens. A built-in photographing head, a stage on which a subject is placed, a support for supporting the photographing head above the stage, a tele-side operation member operated when changing the focal length of the zoom lens to the tele side, and the zoom lens. In an imaging device including a wide side operation member that is operated when changing to the wide side, a sensor for detecting the focal length of the zoom lens, and a memory reproduction for operating when storing or reproducing the focal length of the zoom lens Simultaneously operating both the operating member, one of the tele-side operating member and the wide-side operating member, and the memory reproducing operating member. When the focal length of the zoom lens is stored based on the output signal of the sensor, and when both the tele side operation member and the wide side operation member and the storage reproduction operation member are operated simultaneously, It is characterized in that control means for controlling the operation of the driving means is provided so that the focal length of the zoom lens returns to the stored focal length.

[0005]

According to the present invention, a desired angle of view can be selected by simultaneously operating either one of the tele side operation member and the wide side operation member and the memory reproduction operation member. The desired angle of view can be swiftly and accurately reproduced without the need for visual confirmation by simultaneously operating either the tele side operation member or the wide side operation member and the memory reproduction operation member. The corner reproduction operation is easy and the usability is greatly improved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows the overall construction of an image pickup apparatus 10 according to an embodiment of the present invention. The imaging device 10 includes a stage 12 on which a subject 11 such as a slide film, a pamphlet, a book, or a model is placed, and a photographing head 1 for photographing the subject 11 placed on the stage 12 and extracting an image signal.
3, a column 14 for supporting the photographing head 13 above the central portion of the stage 12, a pair of left and right illumination lamps 15 for illuminating the subject 11 placed on the stage 12 from above the stage 12, such as a monitor TV not shown. By connecting to the video image reproducing means, the image of the subject 11 can be reproduced as a video image. A base 16 is provided at the rear end of the stage 12.
And a base end of an arm 17 that supports the illuminating lamp 15 is attached to both left and right ends of the base 16. The arm 17 is detachably attached to the base 16 and can be removed when the imaging device 10 is not used. Base 16
The base end portion of the column 14 is attached to the base so as to be rotatable in the vertical direction, and can be locked at either the standing position shown in FIG.

The photographing head 13 is attached to the tip of the column 14 via a rotation mechanism 18, and can rotate in the front-back direction of the stage 12. As shown in detail in FIG.
The zoom lens 19 is built into the head cover 13A and is fixed to the head cover 13A by a bracket 20. Zoom lens 19
A circuit board 21 is fixed to the lens barrel of, and an image pickup element 22 for photoelectrically converting the image of the subject 11 formed by the zoom lens 19 is attached to the circuit board 21. In this embodiment, a CCD (charge coupled device) is used as the image pickup device 22. Further, the stepping motor 24 and the potentiometer 25 are fixed to the bracket 23 fixed to the lens barrel of the zoom lens 19, and the zooming ring 19a of the zoom lens 19 includes the gear 26, the gear 27, and the gear pair 22, respectively.
The stepping motor 24 and the potentiometer 25 are connected via 6 and a gear 28. When the stepping motor 24 is driven, the zooming ring 19a rotates, the focal length of the zoom lens 19 changes, and the angle of view can be changed. Further, since the output signal value of the potentiometer 25 changes in association with the zooming ring, the focal length of the zoom lens 19 and thus the angle of view can be detected by the meter 25.

The operation of the stepping motor 24 is controlled by the signal output from the potentiometer 25 and the stage 1
2 is controlled by the control means 40 built in the stage 12 on the basis of signals output from the tele switch 30, the wide switch 31, and the set switch 32 arranged on the operation panel 29 (see FIG. 1) provided on the front surface of the stage 2. Here, the tele switch 30 is operated when changing the focal length of the zoom lens 19 to the tele side, and the wide switch 3 is operated.
1 is operated when changing the focal length of the zoom lens 19 to the wide side. The set switch 32 stores the desired focal length of the zoom lens 19 and is operated when the stored focal length is reproduced. As shown in FIG. 1, since the set switch 32 is arranged between the tele switch 30 and the wide switch 31, it is easy to operate the tele switch 30 and the set switch 32 or the wide switch 31 and the set switch 32 simultaneously with one hand. it can.

Next, the functional structure of the control means 40 is shown in FIG.
As shown in the block diagram in FIG. 1, the control means 40 is connected to the motor drive circuit 41 and the drive circuit 41 via an output interface, and the potentiometer 2 is provided.
5, a tele switch 30, a wide switch 31, and a set switch 32, and a microcomputer 42 connected via an input interface. An example of the procedure for controlling the operation of the stepping motor 24 by the microcomputer 42 will be described with reference to the flowcharts shown in FIGS.

Since the memory of the microcomputer 42 is provided with a memory for storing the focal length of the zoom lens 19 based on the output signal of the potentiometer 25, when the image pickup apparatus 10 is powered on, first, step 101 Then, this memory is cleared and the process proceeds to step 102. In step 102, it is determined whether or not the wide switch 31 is operated. If the wide switch 31 is not operated and is not turned on, the process proceeds to step 103. In step 103, it is determined whether or not the teleswitch 30 is operated, and if it is not operated and is not turned on, the process returns to step 102. On the other hand, when the tele switch 30 is operated and turned on, the process proceeds to step 104, and the set switch 3
It is determined whether or not 2 is operated. Here, when the set switch 32 is operated and is on, the routine proceeds to step 105, where the output signal value of the potentiometer 25 is read, the focal length of the zoom lens 19 is detected based on this value and stored in the memory, and the routine proceeds to step 106. . Step 1
At 06, it is determined whether or not the set switch 32 is continuously operated, and the operation stays at step 106 while the operation is continued. On the other hand, when the operation of the set switch 32 is released and turned off, the routine proceeds to step 107, where it is determined whether or not the tele switch 30 is continuously operated.
Here, while the operation of the teleswitch 30 is being continued, the operation stays at this step 107, and when the operation is released and turned off, the operation returns to step 102.

When the tele switch 30 and the set switch 32 are simultaneously operated by the above procedure, the zoom lens 1
9 focal lengths are stored in memory. Also, once the tele switch 30 and the set switch 32 are simultaneously operated,
Unless the operation of both switches is released, even if the operation of the tele switch 30 is continued, the stepping motor 2
4 does not operate and the angle of view does not change. If the set switch 32 is not operated and is not turned on in step 104, the process proceeds to step 108 and the motor drive circuit 4
The tele-side drive signal is output to 1. When this signal is output, the stepping motor 24 is driven to the tele side by one step, and the focal length of the zoom lens 19 is adjusted to the tele side, so that the angle of view becomes small. Then, step 1
In step 09, it is determined whether or not the operation of the teleswitch 30 is continued, and while the operation is continued, the process returns to step 108 and the tele-side drive signal is output. On the other hand, when the operation of the teleswitch 30 is released, the process returns to step 102. With this procedure, the focal length of the zoom lens 19 is adjusted to the tele side while operating only the tele switch 30.
The angle of view decreases.

On the other hand, when the wide switch 31 is operated and is turned on in step 102, the routine proceeds to step 110, where it is determined whether or not the set switch 32 is operated. When the set switch 32 is not operated and is not turned on, the process proceeds to step 111, and the motor drive circuit 41
The wide side drive signal is output to. When this signal is output, the stepping motor 24 is driven to the wide side by one step, and the focal length of the zoom lens is adjusted to the wide side, so that the angle of view becomes large. Then, step 11
In step 2, it is determined whether the operation of the wide switch 31 is continued, and while it is continued, the process returns to step 111. With this procedure, the focal length of the zoom lens 19 is adjusted to the wide side while the wide switch 31 is being operated, and the angle of view is increased.

At step 110, the set switch 3
When 2 is operated and turned on, the process proceeds to step 113, and it is determined whether or not the focal length of the zoom lens 19 is stored in the memory in advance.
4, the output signal of the potentiometer 25 is read and the focal length of the zoom lens 19 is detected. Then,
In step 115, it is determined whether or not the difference between the focal length stored in the memory and the focal length detected in step 114 is within a preset allowable range. If the difference is within the allowable range, step 120 described later is executed. Go to. On the other hand, when it is outside the allowable range, the routine proceeds to step 116, where the driving direction of the stepping motor 24 is discriminated by discriminating the magnitude of the focal length stored in the memory and the focal length detected at step 114, and step 117 Proceed to.
In step 117, based on the determination result in step 116, the wide side drive signal is output to the motor drive circuit 41 when the detected focal length is larger than the stored focal length, and the tele side drive signal is output when it is smaller. . As a result, the stepping motor 24 is driven toward the wide side or the tele side by one step, and the zoom lens 1
The focal length of 9 approaches the stored focal length.

Then, the process proceeds to step 118, the output signal of the potentiometer 25 is read again to detect the focal length of the zoom lens 19, and the process proceeds to step 119. In step 119, it is determined again whether the difference between the focal length of the zoom lens 19 detected in step 118 and the stored focal length is within the allowable range. If it is outside the allowable range, the process returns to step 116, and if it is within the allowable range, the process proceeds to step 120. In step 120, it is determined whether or not the set switch 32 is continuously operated,
This step 120 remains as long as the operation is continued. On the other hand, when the operation of the set switch 32 is released and turned off, the routine proceeds to step 121, where it is determined whether or not the wide switch 31 is continuously operated. Here, while the operation of the wide switch 31 is continued, the operation stays in this step 121, and when the operation is released and turned off, the process returns to step 102. With the above procedure, the wide switch 31
When the and set switches 32 are simultaneously operated, the focal length of the zoom lens 19 returns to the focal length stored in the memory. Further, once the wide switch 31 and the set switch 32 are operated at the same time, the stepping motor 24 does not operate even if the operation of the wide switch 31 is continued unless the operation of both switches is released, so the angle of view changes. do not do. As described above, according to the present embodiment, the tele switch 30 and the set switch 3 are
A desired angle of view can be selected by operating both 2 at the same time, and the selected desired angle of view can be easily and quickly reproduced by operating both the wide switch 31 and the set switch 32 at the same time. Very good.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire image pickup apparatus according to an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is a block diagram showing a functional configuration of control means provided in the imaging apparatus.

FIG. 4 is a flowchart showing an operation procedure by the control means.

FIG. 5 is a name flowchart showing an operation procedure by the control means.

[Explanation of symbols]

10 ... Imaging device, 11 ... Material, 12 ... Stage, 13 ...
Shooting head, 13A ... Head cover, 14 ... Post, 15
... illumination lamp, 16 ... base, 17 ... arm, 18 ... turning mechanism, 19 ... zoom lens, 19a ... zooming ring,
20 ... Bracket, 21 ... Circuit board, 22 ... Image sensor,
23 ... Bracket, 24 ... Stepping motor, 25
... Potentiometer, 26, 27, 28 ... Gear, 30 ...
Tele switch, 31 ... Wide switch, 32 ... Set switch, 40 ... Control means, 41 ... Motor drive circuit, 4
2 ... Microcomputer.

Claims (1)

[Claims] 1. A photographing head having a built-in image pickup device for photoelectrically converting an image of a subject, a zoom lens for forming an image of the subject on the image pickup device, and driving means for variably adjusting a focal length of the lens, and a subject. A stage to be mounted, a support column that supports the photographing head above the stage, a tele-side operation member that is operated when changing the focal length of the zoom lens to the tele side, and when changing the zoom lens to the wide side An image pickup apparatus comprising a wide-side operation member for operation, a sensor for detecting a focal length of the zoom lens, a memory reproduction operation member operated when storing or reproducing the focal length of the zoom lens, and the tele side. When either one of the operation member and the wide-side operation member and the memory reproduction operation member are operated simultaneously, the sensor output The focal length of the zoom lens is stored based on the force signal, and the focal length of the zoom lens is obtained when both the tele-side operation member and the wide-side operation member and the storage reproduction operation member are simultaneously operated. The image pickup apparatus is provided with control means for controlling the operation of the driving means so as to return to the stored focal length.