JPH10170835A - Vibration proof telescope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vibration proof telescope that is small in size and light in weight, simple in structure and mechanism, and low in cost, by controlling an optical system for vibration proof arranged inside a telescope based on a signal from a photodetector placed inside an optical system for photodetecting. SOLUTION: When the telescope optical system 5 is inclined to a projection optical system 1, the optical system 4 for photodetecting combined to the system 5 is also inclined, so that a light condensing point on the optical element 7 for photodetecting is deviated from an origin. The positional information of the light condensing point is arithmetically calculated by a computing element 8, so that the inclined amount to the projection optical system of the system 5 is calculated. A driving device 10 drives the optical system 11 for vibration proof inside the system 5 through a controller 9 based on the calculated amount. The system 11 is driven in a direction perpendicular to the optical axis 12 of the system 5, and deflects the luminous flux from an object, so that image blur can be prevented. The system 11 is desirably a lens system while considering the simpleness and the weight of the mechanism and the structure for control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for use in small hand-held telescopes, binoculars, etc., for preventing image blurring due to the movement of these observation optical systems due to camera shake.

[0002]

2. Description of the Related Art Apparatuses for preventing image blurring due to camera shake of an observation optical system such as a telescope and binoculars are disclosed in, for example, JP-A-50-3644 and JP-A-7-175099. Are known. JP-A-50-3
No. 644 uses a gimbal support for the erect prism,
Japanese Patent Application Laid-Open No. Hei 7-175099 discloses a set of special shake detectors (sensors) for detecting camera shake in the pitch direction and the yaw direction by deflecting a light beam using the gyro principle. ) Is used to control the angle of the apex angle of the variable apex angle prism in front of the objective lens based on the signal from the detector, and to deflect the light beam to prevent image blur.

[0003]

When the above gyro is incorporated in a telescope, it is technically difficult to structurally reduce the size of the gyro or the erecting prism. Therefore, there has been a problem that the size of the telescope increases and the weight increases.

In the case of using an angular acceleration sensor, a small but special sensor is used, so that the cost is increased. Furthermore, since the variable apex angle prism has a complicated structure and mechanism, there is a problem that a telescope incorporating the prism is expensive.

The present invention has been made in view of such a situation, and an object of the present invention is to provide an inexpensive anti-vibration telescope which is small and lightweight, has a simple structure and mechanism, and is inexpensive.

[0006]

In order to achieve the above object, the anti-vibration telescope according to the present invention has a light projecting optical system arranged on the observer side, and the light is projected from the light projecting optical system on the telescope side. A light receiving optical system having an opening on the observer side for receiving the light beam is provided. Based on a signal from a light receiving element placed in the light receiving optical system, a vibration isolating optical system arranged in the telescope is provided. The control is characterized in that image blurring due to camera shake of the telescope is corrected.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. The light projecting optical system 1 is arranged independently of the telescope optical system 5, and is attached to, for example, an eyeglass frame or a goggle. Light emitted from the light source 2 is converted into parallel light by the collimating lens 3. A light receiving element 7 is arranged in the light receiving optical system 4 coupled to the telescope optical system 5, and light from the light projecting optical system 1 forms an image on the light receiving element 7 at the focal position of the collimating lens 6 (collects light). ) Is done. The light receiving element 7 is desirably one that can obtain two-dimensional information on the image forming position of the parallel light, such as a two-dimensional CCD shown in FIG.

Here, by making the light from the collimating lens 3 into parallel light, even if the light projecting optical system 1 and the light receiving optical system 4 are displaced parallel to each other in a direction perpendicular to the optical axis, the light receiving element 7 Is located at the focal position of the collimating lens 6, the position of the imaging point on the light receiving element 7 does not change. In addition, since the telescope optical system is usually fixed to the forehead by eyes or the like, there is almost no need to consider the influence of the inclination of the head.

The origin O of the light receiving element 7 shown in FIG. 3 is generally set at the center of the light receiving element. However,
By storing the relative positional relationship between the light projecting optical system 1 and the telescope optical system 5 in the initial state, that is, the mutual inclination, an arbitrary position on the light receiving element 7 can be set as the origin O.

As shown in FIG. 2, if the telescope optical system 5 is inclined at an angle θ with respect to the light projecting optical system 1, the light receiving optical system 4 coupled to the telescope optical system 5 is also inclined at an angle θ. Image position on the light receiving optical element 7 (focus point)
P also deviates from the origin O.

The position information of the converging point P is calculated by the calculator 8 to calculate the amount of inclination of the telescope optical system 5 with respect to the light projecting optical system. Then, the anti-vibration optical system 11 in the telescope optical system is driven by the driving device 10 via the control device 9 based on the calculated amount. The anti-vibration optical system 11 is the optical axis 1 of the telescope optical system 5.
2 is driven in a direction perpendicular to the direction 2 to deflect a light beam from an object, thereby preventing image blurring. Here, the anti-vibration optical system 11
It is preferable to use a lens system from the viewpoint of simplicity of control mechanism and structure and weight.

FIG. 4 shows a second embodiment of the present invention. In the second embodiment, the mechanism for preventing image blur is the same as that in the first embodiment, but the eyepiece 13 of the observation optical system is connected to the light receiving optical system 4.
The first light splitting means 17 belonging to the light projecting optical system is disposed between the light projecting optical system 1 and the eyepiece 13.

The light from the light projecting optical system passes through an eyepiece 13 also serving as a light receiving optical system, and is reflected by a second light splitting means 18 disposed in the telescope optical system 5 to form an image forming lens. 19 forms an image on the light receiving element 7.

In this case, the light of the light projecting optical system is desirably invisible light such as infrared light.
It is desirable that the light splitting means 17 and 18 be splitting means having different transmission characteristics depending on the wavelength, such as a dichroic mirror for passing visible light from an object and reflecting light from the light projecting optical system.

[0015]

According to the present invention, a small and lightweight anti-vibration telescope can be obtained. Further, since only one light receiving element for detecting the shake signal is required, an inexpensive anti-vibration telescope can be provided as compared with a conventional one using a plurality of special elements.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a structure of a vibration-proof telescope according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram when the anti-vibration telescope of the first embodiment is inclined at an angle θ.

FIG. 3 is an explanatory diagram showing an image forming position of a light beam from a light projecting optical system on a light receiving element.

FIG. 4 is an explanatory diagram showing a structure of a vibration-proof telescope according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light projecting optical system 2 light source 3, 6 collimating lens 4 light receiving optical system 5 telescope optical system 7 light receiving element 8 arithmetic unit 9 control device 10 driving device 11 anti-vibration optical system 12 optical axis 13 eyepiece 14 objective lens 15 Erect prism 16 Eye point 17 First light splitting means 18 Second light splitting means 19 Imaging lens

Claims (4)

[Claims] 1. A light-receiving optical system disposed on an observer side, and a light-receiving optical system coupled to a telescope and having an opening on the observer side for receiving a light beam emitted from the light-projection optical system. In the telescope provided with, the image blur due to the blur of the telescope is controlled by controlling the anti-vibration optical system arranged in the telescope based on the signal from the light receiving element arranged in the light receiving optical system. An anti-vibration telescope characterized by correcting the following. 2. The anti-vibration telescope according to claim 1, wherein the light beam projected from the light projecting optical system is parallel light. 3. The anti-vibration telescope according to claim 2, wherein the light receiving element in the light receiving optical system is a two-dimensional light receiving element. 4. The anti-vibration telescope according to claim 3, wherein the anti-vibration optical system disposed in the telescope comprises a lens system.