JPH07175099A - Optical instrument - Google Patents

Abstract

PURPOSE:To miniaturize an optical instrument and to obtain excellent image stablizing state by providing a shake detecting means, plural image blurring correcting means and an electrode supply means. CONSTITUTION:Camera shake is detected as shake quantity by shake detectors 114a and 114b, and is inputted to a control circuit 115. The control circuit 115 decides quantity to drive a variable apex angle prism based on the shake quantity and transmits it to a coil driving circuit 116. The coil driving circuit 116 converts it into the quantity to drive coil based on the driving quantity decided by the control circuit 115 and transmits it. Also a signal obtained by irradiating a light receiving element is inputted to the control circuit 115 and the difference obtained by comparing the quantity to drive the variable apex angle prism with actual driving quantity is inputted to the coil driving circuit 116. In this case, a power source 121 respectively supplys power to a suppressing mechanism 100, the shake detectors 114a and 114b, the control circuit 115 and the driving circuit 116.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image blur correction function for detecting a blur amount of an optical device and deflecting an optical axis so that an optical image of the optical device is always held at a constant position based on the detected output. The present invention relates to an optical device such as binoculars and a camera.

[0002]

2. Description of the Related Art Conventionally, as an optical device for eliminating image blur, as disclosed in JP-A-50-5058,
Binoculars with an image stabilizer in which a gyroscope is connected to an erecting prism supported by a gimbal are known.

[0003]

However, in the image stabilizing device using the gyro, since the rotor of the gyro is rotated at a high speed, it takes time for the motor to fully rotate, and in order to stabilize the image. However, there is a problem that the rotor must be constantly rotated at a high speed, and that the gimbal mechanism is equipped with a gyro and two erecting prisms, so that the apparatus becomes large in size.

The present invention is intended to solve the above-mentioned conventional problems, and an object thereof is to provide an optical apparatus capable of obtaining a good image stable state and effectively reducing the size of the apparatus. There is.

[0005]

SUMMARY OF THE INVENTION The present invention is to achieve the above-mentioned object, and includes a blur detecting means, and a plurality of image blur correcting means for performing image blur correction according to the blur detecting means, The image forming apparatus includes a blur detecting unit and a power supply unit for supplying electric power to the plurality of image blur correcting units.

Further, according to the present invention, a blur detecting means, a pair of optical systems, and a plurality of image blur correcting means for performing image blur correction according to the blur detecting means arranged in the optical system are provided. ,
The image forming apparatus includes a blur detecting unit and a power supply unit for supplying electric power to the plurality of image blur correcting units.

The present invention is effective when applied to binoculars, stereo cameras, etc., which typically have a pair of optical systems.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing binoculars, which is an optical apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view for explaining in detail a suppressing mechanism described later in FIG.

First, the suppression mechanism of FIG. 2 described above will be described below.

Reference numerals 102a and 102b are two transparent plates facing each other, and a transparent film 10 for sealing the transparent plates and the outer periphery thereof.
The space sealed by 3 is filled with a high refractive index liquid 101 (not shown), which constitutes a variable apex angle prism. Reference numerals 104a and 104b denote frame bodies for sandwiching the variable apex angle prism. The transparent plates 102a and 102b forming a part of the variable apex angle prism are rotatably held around a pitch shaft 105a and a yoke shaft 105b. ing. Reference numeral 106a denotes a flat coil fixed to one end of the front frame 104a.
7a and yokes 108a and 109a are arranged to form a closed magnetic circuit. 111a is an arm portion integrally formed with the frame 104a, and a slit 110a is provided in this arm portion. 112a and 113a
Are arranged at positions facing each other with the slit 110a interposed therebetween. These are, for example, a light emitting element 112 such as an IRED.
a and a light receiving element 113a such as a PSD whose output changes depending on the spot position of the emitted light beam.
The light flux emitted from 2a passes through the slit 110a and then is irradiated onto the light receiving element.

Returning to FIG. 1, 122 is a lens barrel,
Inside the suppression mechanism 100 and the shake detector 114 described above.
a, 114b, eyepiece (not shown), objective lens (not shown), image erecting prism (not shown), control circuit 115,
A drive circuit 116 and a power supply 121 are provided.

Here, the shake detectors 114a and 114b are for detecting shake amounts in the pitch direction and yaw direction of the entire apparatus, and the control circuit 115 is also for controlling the entire apparatus described above, and the drive circuit 116. Drives the coil 106a for the pitch direction in accordance with a signal from the control circuit 115 to rotate the frame 104a in the pitch direction, and similarly,
A frame 104 is driven by driving a coil for yaw direction (not shown)
This is for rotating b in the yaw direction. And
The power supply 121 includes the suppression mechanism 100 and the shake detector 114.
Power is supplied to each unit such as a, 114b, the control circuit 115, and the drive circuit 116. As the power source 121, for example, a primary battery, a secondary battery, an AC adapter, a DC adapter or the like can be used. Except for the power supply 121, each part is arranged in pairs inside the lens barrel 122.

The blur detectors 114a and 114b are
They are arranged so as to be orthogonal to each other, and the angle formed by the orthogonal axes formed by them and the orthogonal axes formed by the coils 106a and 106b of the suppression mechanism 100 is relatively zero.

Reference numeral 123 denotes a connecting shaft for connecting a pair of left and right lens barrels 122. The lens barrel 122 of this embodiment is connected by this connecting shaft 123 and is rotatable about this as shown by an arrow. It is provided in. That is, when the user adjusts the eye width, the lens barrel 122 can be rotated around the connecting shaft 123 and used as described above.

Next, the operation will be described below.

In the means for suppressing blurring in this figure, camera shake is detected by the blurring detectors 114a and 114b as the amount of blurring and is input to the control circuit 115. The control circuit determines the amount to drive the variable apex angle prism on the basis of this blur amount, and transmits it to the coil drive circuit 116. The coil drive circuit 116 converts the amount of drive of the coils 106a and 106b into a drive amount based on the drive amount determined by the control circuit 115, and transmits the converted amount. On the other hand, the light emitting elements 112a and 112
The slits 110a, 110 are fired from b (not shown).
A signal obtained by passing through b and irradiating the light receiving elements 113a and 113b (not shown) is input to the control circuit 115, and the amount to be driven of the variable apex prism described above is compared with the actual driving amount. Then, the difference is input to the coil drive circuit 116. Through these operations, the variable apex angle prism operates independently in the pitch direction and the yaw direction, and it becomes possible to observe from the eyepiece lens as if there was no camera shake.

When changing the eye width, the lens barrel 122 may be rotated about the connecting shaft 123 as described above.

As described above, according to the present embodiment, the suppression mechanism including the variable apex angle prism is used to detect the hand shake by using two sets of small shake detectors for the pitch and yaw for the left and right lens barrels. In the same manner as described above, two sets are used to deflect the light, and this is driven by a single power source, so that this object can be achieved.

As a result, in contrast to the gyro motor type device which has a problem in that the size of the conventional device is increased, an extremely small and lightweight device including an actuator for driving the variable apex angle prism and a shake detector can be obtained. Is obtained.

Although the suppressing mechanism 100 is arranged at the forefront of the binoculars in the above embodiment, it may be arranged at the position shown by the broken line in FIG. 3, that is, inside the lens barrel. Further, in this embodiment, the power source is described as being built in, but the power source may be supplied from the outside.
For example, when driving the suppressing means with an external power source, the power from the built-in power source may be prohibited and the external power may be prioritized.

FIG. 4 shows an example in which the above-mentioned blur suppression means is applied to a stainless steel camera capable of taking a three-dimensional photograph. In FIG. 4, the same reference numerals as those in FIGS. 1 to 3 indicate the same members, and thus the description thereof will be omitted. Also, the procedure for suppressing blurring is the same as in the above example,
Omit it.

In FIG. 4, reference numeral 201 denotes a body of the stereo camera, which includes the suppressing mechanism 100 and the shake detector 11.
4a and 114b, a control circuit 115, a drive circuit 116, a power supply 121, and a lens 202 of an optical system are held.

Therefore, if a camera shake occurs when the camera is held by hand and a picture is taken, the camera shake is detected by a small camera shake detector as described in the above example, and based on the amount of the camera shake. By driving the variable apex angle prism, the optical axis is deflected, and the obtained image becomes a static image, which enables photography without blurring.

The stereo camera described in this example also drives the suppression mechanism, the blur detector, the control circuit, and the drive circuit with a single power source as in the previous example. Further, in this example, only one set of the shake detectors is used, but the present invention can be achieved by detecting the shake by one set of shake detectors and similarly driving both the left and right suppression mechanisms. Therefore, the stereo camera can be made more compact and the power consumption can be suppressed.

Also in this embodiment, the suppressing mechanism is arranged on the front surface of the lens 202 as in the previous embodiment, but it may be arranged on the rear side of the lens. Further, although this stereo camera has two eyes, it goes without saying that the above suppression mechanism can be applied to a stereoscopic imaging system with two or more eyes.

[0027]

As described above, the optical apparatus according to the present invention has an effect that it is possible to provide an apparatus capable of obtaining a good image stable state as a small apparatus, and When the means for giving priority to the external power source is provided, it is possible to have an effect that the internal power source can be effectively used.

[Brief description of drawings]

FIG. 1 is a perspective view showing binoculars which is an optical device according to an embodiment of the present invention,

FIG. 2 is an exploded perspective view for explaining the suppression mechanism in detail,

FIG. 3 is a perspective view showing another example in which the suppression mechanism is arranged inside the lens barrel,

FIG. 4 is a diagram showing an example in which the blur suppression unit is applied to a stereo camera capable of taking a three-dimensional photograph.

[Explanation of symbols]

100 ... Suppression mechanism 114a, 11
4b ... shake detector 115 ... control circuit 116 ... drive circuit 121 ... power supply 122 ... lens barrel 123 ... connecting shaft

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location G03B 17/00 J (72) Inventor Katsumi Azusa 3-30-2 Shimomaruko, Ota-ku, Tokyo Kiya Non non corporation

Claims (3)

[Claims] 1. A blur detecting means, a plurality of image blur correcting means for correcting blur of an image formed at a predetermined position in accordance with an output from the blur detecting means, the blur detecting means and the plurality of images. An optical apparatus comprising: a power supply unit for supplying power to the blur correction unit. 2. A blur detection unit, a pair of optical systems, and a blur correction of an image which is arranged in each of the pair of optical systems and which is formed at a predetermined position in accordance with an output from the blur detection unit. An optical apparatus comprising: a plurality of image blur correction means for performing the above; a blur detection means; and a power supply means for supplying electric power to the plurality of image blur correction means. 3. The optical device according to claim 1, wherein the power supply unit includes an internal power supply for the optical device and a selection unit for preferentially selecting an external power supply.