JP2000066113A - Binoculars - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable stable observation free from camera-shake and exact distance measurement to a remote distance by providing the binoculars with an optical blur correcting means for correcting the blur of the rays for observation and the rays for range finding. SOLUTION: The camera-shake correcting means comprises a vibration sensor 19, a microcomputer 18 vertex angle varying prisms 3, 4, a prism driving means 20, a vertex angle sensor 17, etc. The IF light outputted from a laser diode 11 is reflected by a dichroic mirror 7 in a range finding means and is subjected to the correction of the camera-shake at the time of passing the vertex angle varying prism 3 like the observation light. An object to be measured is irradiated with this light and the reflected IR light is condensed by an objective lens 2 and is subjected to the correction of the camera-shake by the vertex angle varying prism 4. This light is reflected by a dichroic mirror 8 and is imaged on the photodetecting surface of a photodetector 12. The camera-shake is corrected in such a manner and the large and high performance objective lens 1, 2 are commonly used for range finding and observation, by which the correct parallel projection of the IR light is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to binoculars having a shake correcting means capable of measuring a distance.

[0002]

2. Description of the Related Art Conventionally, binoculars provided with a distance measuring device and used for autofocusing are known.
5-0011196. As an example of a distance measuring device using infrared rays, there is a device described in the section of 11.4 laser radar in “Laser Handbook” issued by Asakura Shoten in 1973.

On the other hand, as an optical image blur correcting means, a means using a variable apex angle prism and a method using an erect prism as a blur correcting means are known.

[0004]

The above conventional example has the following problems.

[0005] 1. To measure the distance to a distant object, it is conceivable to increase the power of the infrared light to be projected. However, the power is naturally limited, and the distance that can be measured is limited.

[0006] 2. If the projection light beam is blurred during the distance measurement, a distance measurement error occurs.

[0007] 3. If the received light beam has image blur, a ranging error occurs.

[0008] 4. If the projected infrared light is not correctly projected on the object to be measured, a distance measurement error such as measurement of an unintended object occurs.

[0009] 5. If the emitted infrared light is not correctly projected on the object to be measured, it will be difficult to measure at a long distance.

It is an object of the present invention to solve the above problems and to provide binoculars capable of performing stable observation without image blurring and accurately measuring a long distance.

[0011]

The binoculars of the present invention have the following features.

[1]: a pair of objective lenses, a pair of eyepieces for observing an object image by the objective lenses,
A pair of binoculars having distance measuring means for detecting a distance to an object, comprising optical blur correcting means for correcting blurring of the light beam for observation and the light beam for distance measuring.

[2]: a pair of objective lenses, and a pair of eyepieces for observing an object image by the objective lenses;
Binoculars having optical blur correction means for optically correcting blurring of an observation image, wherein distance measuring means for detecting a distance to an object using a light beam passing through the optical blur correction means is provided. Binoculars characterized by the following.

[3]: a pair of objective lenses, a pair of eyepieces for observing an object image by the objective lenses,
A pair of binoculars including a light projecting unit that projects measurement light to an object to be measured and a light receiving unit that receives measurement light reflected by the object to be measured, wherein the observation light and the measurement light Binoculars having an optical blur correcting means for correcting the image blur.

[4]: a pair of objective lenses, and a pair of eyepieces for observing an object image by the objective lenses;
A binocular having light projecting means for projecting measurement light to the object to be measured via the objective lens, and light receiving means for receiving the measurement light reflected by the object to be measured via the objective lens, wherein A pair of binoculars, comprising optical blur correction means for correcting blurring of the observation light and the measurement light for observation.

[5]: a pair of objective lenses, and a pair of eyepieces for observing an object image by the objective lenses;
Projection means for projecting infrared light through the objective lens,
Binoculars having a light receiving unit for receiving the infrared light reflected by the object to be measured through the objective lens, and a branching unit for branching the infrared light projecting / receiving line and the observation light guided to the eyepiece. Binoculars comprising optical blur correction means for correcting blurring of the observation light and the measurement light relating to the observation.

[6] The binoculars according to [5], wherein the optical blur correction means is disposed between the objective lens and the branching means.

[7] The binoculars according to [5] or [6], wherein the branching means is a dichroic mirror that reflects the measurement light.

[8] The binoculars according to any one of [1] to [7], wherein the measurement light is infrared light.

[0020]

[9]: The light projecting means projects the measuring light via one of the pair of objective lenses, and the light receiving means receives the measuring light via the other objective lens. [4] The binoculars according to any one of the above items [8] to [8].

[10]: The optical blur correction means is a variable apex prism [1] to [1].

[9]
The binoculars according to any one of the above.

[11] The optical blur correcting means is an objective lens or a part of the objective lens held movably in a direction orthogonal to the optical axis.

The binoculars according to any one of [9].

[12] The optical blur correction means is a reflective optical element including a prism disposed between the objective lens and the eyepiece [1] to [1].

The binoculars according to any one of [9].

[13] The binoculars according to any one of [1] to [12], wherein display means for displaying information obtained by projecting and receiving the measurement light in an observation visual field is provided. .

[14] The binoculars according to [13], wherein the information displayed in the observation visual field is displayed along the periphery of the visual field.

<Operation> As described above, by using the objective lens and the shake correcting means for both distance measurement and observation, it is possible to observe a blur-free object image and to reduce the blur of the light beam for distance measurement. Correction enables accurate distance measurement.

In particular, by projecting the measuring light through the objective lens and receiving the measuring light through the objective lens, a large, high-performance objective lens having a bright visual field for observation and a resolving power is provided. Used for projecting and receiving measurement light. As a result, since the high-performance objective lens used for light projection can collimate the measurement light and project it to the object under measurement, the measurement light does not diverge and is not attenuated, so that it can be applied to a longer distance. Is possible. A large objective lens for receiving light has a light-gathering power, and can detect weak reflected light from a farther distance.

Also, a branching means is provided to branch the infrared light projecting / receiving line and the observation light, and a blur correcting means is provided between the objective lens and the branching means to observe the optical path of the projecting / receiving line. The optical path of the light is made as common as possible, and the aperture diameter of the objective lens and the blur correction means is not made unnecessarily large, thereby reducing the size of the entire apparatus.

Further, since the information obtained by the light emission and reception is displayed along the periphery in the observation field of view, even if the eyepiece is rotated and the information rotates, the observer is less likely to feel uncomfortable. I have to.

[0030]

FIG. 1 is a schematic diagram of a first embodiment according to the present invention. In the figure, 1 and 2 are objective lenses,
3 and 4 are apex angle variable prisms, 3a and 4a are front glass windows of the apex angle variable prisms 3 and 4, 3b and 4b are rear glass windows,
3c and 4c are bellows, 3d and 4d are optically transparent liquids having a high refractive index, 3e and 4e are rotation axes of glass windows 3a and 4a, 3f and 4f are rotation axes of glass windows 3b and 4b. A connecting member for connecting the front glass windows 3a and 4a of the left and right apex angle variable prisms; a link member for rotating the rear glass windows 3b and 4b of the left and right apex angle variable prisms in the same direction;
7 and 8 are dichroic mirrors, 9 and 10 are lenses, 1
1 is a laser diode, 12 is a light receiving element, 13, 14
Is an erect prism, and 15 and 16 are eyepieces.

The objective lenses 1 and 2 and the erect prism 13
The optical system for observation composed of 14 and the eyepieces 15 and 16 has the same configuration as ordinary binoculars.

First, the distance measuring means will be described. The pulsed infrared light (measurement light) emitted from the laser diode 11 passes through the lens 9 and is reflected by the dichroic mirror 7 that reflects only the infrared light, passes through the apex angle variable prism 3, and becomes substantially parallel light rays by the objective lens 1. The object to be measured is irradiated.

The infrared light reflected back from the object to be measured is collected by the objective lens 2, only the infrared light is reflected by the dichroic mirror 8, and imaged on the light receiving element 12 by the imaging lens 10. You. FIG. 2 is an explanatory diagram of the operation of the distance measuring means. The power supply 21 supplies power to the laser diode 11 of the light transmitting unit 22. The light transmitting unit 22 generates and transmits a light transmitting pulse for distance measurement. The transmitted pulse is reflected on an object to be measured (not shown) and reflected by the light receiving unit 23.
Are received by the light-receiving element 12 of the first embodiment. The light detection timing signal from the light transmission unit is input to the distance detection unit 24, and the distance to the measured object is detected from the time interval between the light transmission pulse and the light reception pulse. In the present embodiment, the distance data measured in this way is output to the display means and displayed in the eyepiece or the like.

Next, the system configuration of the camera shake correction means will be described with reference to FIG. This system detects a vibration sensor 19, a microcomputer 18, variable apex angle prisms 3, 4, a prism driving means 20, which is a drive actuator for the variable apex angle prisms 3, 4, and detects a vertical angle of the variable apex angle prisms 3, 4. The apex angle sensor 17 and the like constitute one element of the camera shake correction means.

The left and right apex angle variable prisms 3 and 4 are configured to move symmetrically by mechanical link mechanisms 5 and 6 and the like, and therefore only one side will be described. In the figure, a vibration sensor 19 is a vibration gyro sensor, a pitch shake sensor for detecting vertical shake,
It consists of a shake sensor for yaw that detects lateral shake,
The two sensors are fixed to a fixed part (device housing) of the binoculars with the sensitivity axes orthogonal to each other. And this vibration sensor 1
Numeral 9 detects shake as angular acceleration and outputs the information to the microcomputer 18 as a signal.

Next, the operation of camera shake correction in the system configuration will be described. When the microcomputer 18 receives the shake information (angular acceleration) from the vibration sensor 19, the microcomputer 18 immediately calculates and calculates the prism apex angle capable of correcting the shake, and changes the apex angle of the apex angle variable prism 3 by the actuator of the prism driving means 20. Start.

Then, the prism apex angle sensor 17 measures the apex angle of the apex angle variable prism 4 and outputs it to the microcomputer 18.
When this output matches the value calculated, the microcomputer 18 controls the prism driving means 20 to stop driving. As described above, the image blur is corrected by changing the direction of the light beam passing through the variable apex angle prism 4 according to the vibration such as camera shake.

Thus, the objective lens 1 forms an image of the object to be observed in front of the objective lens at a position substantially behind the objective lens and at the front focal point of the eyepiece lens 15. At this time, the image formed by the objective lens 1 is turned upside down. An image is formed as an erect image by the erect prism 13. The image is magnified by the eyepiece 15 for observation.

The light rays incident from the objective lens 1 are as follows:
Since blur is corrected by passing through the apex angle variable prism 3, an image due to the light beam can be observed as a blur-free image. Note that the dichroic prism 7 provided in the optical path for distance measurement reflects only infrared light, and does not obstruct observation because visible light necessary for observation passes through as it is.

In the distance measuring means, the infrared light output from the laser diode 11 is reflected by the dichroic mirror 7 and radiated toward the object to be measured through the variable prism 3 and the objective lens 1. Similarly to the observation light, the irradiation light (infrared light) is subjected to camera shake correction when passing through the apex angle variable prism, and is applied to the object to be measured in a stable state without blur. The infrared light reflected back from the object to be measured is also condensed by the objective lens 2, the blur is corrected by the apex angle variable prism 4, reflected by the dichroic mirror 8, and received by the light receiving element via the lens 10. 1
The light is guided on the light receiving surface 2 to form an image. At this time, the dichroic mirror 8, which is a light splitting means, allows visible light to pass through as it is and reflects infrared light unnecessary for observation, and there is no loss in the amount of infrared light necessary for the distance measuring device. Further, infrared rays do not reach the eyes of the observer, and there is almost no loss in the amount of visible light.

As described above, the objective lenses 1 and 2 are used for both distance measurement and observation, and the large and high-performance objective lenses 1 and 2 are used as lenses for projecting and receiving light. In this case, since infrared light can be correctly parallelized and projected onto an object to be measured, infrared light can be irradiated to a long distance without diverging and attenuating. Further, as a light receiving means, since a lens used for light reception is large and has a high light condensing power, it can detect weak reflected light from a distance.

In particular, in the present embodiment, the shake of each of the light emitting and receiving lines is corrected, so that the measuring light can be emitted with high accuracy.
In addition, since the light can be received with high accuracy, the measurement of a long distance made possible as described above can be performed with high accuracy.

<Second Embodiment> FIG. 3 is a schematic view of a second embodiment according to the present invention. In the figure, 31.3
Reference numeral 2 denotes an objective lens, which is integrally connected to the left and right and is movably held in a plane orthogonal to the optical axis. This embodiment is different from the first embodiment of the present invention described with reference to FIG. 1 in that the objective lenses 31 and 32 are driven in a direction orthogonal to the optical axis instead of driving the apex angle variable prism for blur correction. ing. Since the operation as the binoculars and the operation of the distance measuring device are the same as those in the first embodiment, the same elements are denoted by the same reference numerals and description thereof will be omitted.

The image stabilizing means of this embodiment includes a vibration sensor 1
9, the vibrations in the pitch direction and the yaw direction are detected and input to the microcomputer 18, and the microcomputer 18 calculates the driving amounts of the objective lenses 31 and 32 necessary for blur correction, and detects the driving amounts and the position sensor 34. Based on the positions of the lenses 31 and 32, the objective lens 31
Is driven to deflect light rays passing through the lenses 31 and 32 to perform blur correction.

Also in the present embodiment, the image blur correction of the object image and the blur correction of the light emitting and receiving lines for distance measurement are performed by the shake correction means, so that highly accurate distance measurement can be performed.

<Eye Width Adjustment Mechanism> FIG. 4 is an explanatory diagram of the eye width adjustment mechanism showing the erecting prisms 13 and 14 and the eyepieces 15 and 16 of the above-described embodiment shown in FIGS. is there.

In the above embodiment, the eyepieces 15, 1
The means for changing the interval (interpupillary distance) D in accordance with the interpupillary distance of the user will be described.

As shown in FIG. 4, the erecting prisms 13, 1
Numeral 4 is configured to shift the optical axes A and B on the incident side (object lens side) and the optical axes a and b on the exit side.
The erecting prism 13 and the eyepiece 15, and the erecting prism 14 and the eyepiece 16 are integrally formed, and the optical axes A,
It is attached so that it can rotate around B.

By rotating the erecting prisms 14 and 15 and the eyepieces 15 and 16 independently of each other, the distance D is changed to adjust the eye width of the observer. This allows the objective lens 1
The interpupillary distance can be adjusted without changing the interval of 2, ie, the base line length of the distance measuring means.

At this time, if the eyepiece rotates, the image being observed does not rotate, but if the distance measurement result is displayed in the field of view of the eyepiece, the display information will rotate.

Therefore, in this embodiment, information such as the distance measurement result is displayed around the observation visual field.

FIG. 5 shows an embodiment in which the distance is displayed within the field of view of the eyepiece.

FIG. 6 is a diagram for explaining means for displaying the distance and the like in the eyepiece by combining the image with the objective lens image as an observation image. 1 is an objective lens, 13 is an erect prism, 13a is an auxiliary prism, 15 is an eyepiece, 44
Is a lens, 45 is a display element, and 46 is an image of the display element synthesized at the image forming position of the objective lens 41.

The light beam from the display element 45 is condensed by the lens 44, enters the erecting prism 13 via the auxiliary prism 13a, and is combined with the light beam for observation by the erecting prism 13 to display. Image 4 of distance information displayed on element 45
6 is observed through the eyepiece 15 together with the image of the object to be observed. At this time, the distance information is displayed on the display means 45 so as to be observed along the periphery of the observation visual field as shown in FIG.

As a result, even when the erect prism 13 and the eyepiece 15 are rotated for adjusting the interpupillary distance, the distance information moves and is displayed in the circumferential direction of the observer. Does not give a sense of discomfort.

<Others> In the above-described embodiment, the one that shifts the objective lens and the one that uses the variable apex angle prism are shown as the blur correction means. However, the present invention is not limited to this. A reflection optical element (erect prism) including the arranged prism may be used.

In the above embodiment, a so-called active type distance measuring means for projecting infrared light, receiving the infrared light reflected by the object to be measured, and obtaining the distance to the object is used. However, the present invention is not limited to this, and a part of the light beam from the left and right objective lenses is branched by a half mirror or the like, and formed on the light receiving element surface via an imaging lens. Passive distance measuring means such as detecting the distance from the obtained image deviation to the object to be measured may be used.

Further, in the above-described embodiment, the distance measurement information is displayed and used. However, the present invention is not limited to this, and may be used for auto-focusing such as moving the eyepiece in the optical axis direction to adjust the focus. good.

[0059]

As described above, according to the present invention, it is possible to provide a pair of binoculars capable of performing accurate observation up to a long distance with stable observation without image blur.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the distance measuring means of the present invention.

FIG. 3 is a schematic diagram of a second embodiment of the present invention.

FIG. 4 is a diagram for explaining the interpupillary distance adjusting method of the present invention.

FIG. 5 is a schematic view of an embodiment of a distance display according to the present invention.

FIG. 6 is an explanatory view of a display means of the present invention.

[Explanation of symbols]

 1, 2, 31, 32 Objective lens 3, 4, Variable vertex angle prism 7, 8, Dichroic mirror 9, 10, 44 Lens 11, Laser diode 12, Light receiving element 13, 14, Erect prism 13a Auxiliary prism 15, 16 Eyepiece 17 Prism top Angle sensor 18 Microcomputer 19 Vibration sensor 20 Prism drive unit 21 Power supply 22 Light transmission unit 23 Light reception unit 24 Distance detection unit 33 Lens drive unit 34 Position lenser 45 Display unit

Claims (14)

[Claims] 1. A binocular having a pair of objective lenses, a pair of eyepieces for observing an object image by the objective lens, and a distance measuring unit for detecting a distance to an object, wherein the binoculars include: A pair of binoculars having optical blur correction means for correcting a blur between a light beam and a light beam for distance measurement. 2. A pair of binoculars comprising a pair of objective lenses, a pair of eyepieces for observing an object image by the objective lens, and optical blur correction means for optically correcting blurring of the observed image. Binoculars provided with a distance measuring means for detecting a distance to an object by using a light beam having passed through the optical blur correcting means. 3. A pair of objective lenses, a pair of eyepieces for observing an object image by the objective lens, a light projecting means for projecting measurement light to the object to be measured, and a light reflected by the object to be measured. Binoculars having light receiving means for receiving the measurement light, wherein the binoculars further comprise optical blur correction means for correcting blurring of the observation light and the measurement light relating to the observation. 4. A pair of objective lenses, a pair of eyepieces for observing an object image by the objective lenses, a light projecting means for projecting measurement light to an object to be measured via the objective lenses, Binoculars having light receiving means for receiving, via an objective lens, measurement light reflected by an object to be measured, the binoculars having optical blur correction means for correcting blurring of the observation light relating to the observation and the measurement light. Binoculars characterized by the following. 5. A pair of objective lenses, a pair of eyepieces for observing an object image by the objective lenses, a light projecting means for projecting infrared light through the objective lenses, and a light reflected by an object to be measured. Binoculars having light receiving means for receiving the infrared light through the objective lens, and branching means for branching the infrared light projecting / receiving line and observation light guided to the eyepiece. A pair of binoculars comprising an optical blur correcting unit for correcting blurring of the observation light and the measuring light. 6. The binoculars according to claim 5, wherein said optical blur correction means is disposed between the objective lens and the branching means. 7. The device according to claim 5, wherein the branching unit is a dichroic mirror that reflects the measurement light.
Or binoculars according to 6. 8. The binoculars according to claim 1, wherein the measurement light is infrared light. 9. The apparatus according to claim 1, wherein said light projecting means projects the measuring light through one of said pair of objective lenses, and said light receiving means receives the measuring light through the other objective lens. The binoculars according to any one of claims 4 to 7. 10. The optical blur correcting means is a variable apex prism.
Binoculars according to item 1. 11. The apparatus according to claim 1, wherein the optical blur correction means is an objective lens or a part of the objective lens held movably in a direction orthogonal to the optical axis. Binoculars. 12. The binoculars according to claim 1, wherein the optical blur correction means is a reflection optical element including a prism disposed between the objective lens and the eyepiece. 13. The binoculars according to claim 1, further comprising display means for displaying information obtained by projecting and receiving the measuring light in an observation field. 14. The information displayed in the observation field of view is displayed along the periphery of the field of view.
3. Binoculars according to 3.