JP2004252020A - Telescope, lens hood for telescope, and sighting device for telescope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescope, a lens hood, and an aiming device which are able to prevent an aiming position from deviating after aiming at a target. <P>SOLUTION: This telescope is provided with a telescope main body with an ocular optical system, and a lens-barrel 20a of an objective lens 20 mounted on this telescope main body. The lens-barrel 20a of the objective lens 20 is provided with an aiming member 31 having a positioning mechanism which can rotate the aiming member and also stop it at two or more aiming positions. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a telescope, a lens hood for a telescope, and a sighting device for a telescope.
[0002]
[Prior art]
Conventionally, a telescope has a telescope main body having an eyepiece optical system and an objective lens mounted on the telescope main body.
[0003]
A lens hood is attached to the objective lens so as to protect the lens and prevent irregular reflection at the time of backlight and raindrops from attaching to the lens.
[0004]
The lens hood is movable in the front-rear direction and is rotatable.
[0005]
There is a telescope in which an aiming device is attached to the lens hood, and the aiming position can be changed by rotating the lens hood.
[0006]
[Non-patent literature]
Nikon Fieldscope General Catalog Nikon Vision Inc., 2001. 1-8
[0007]
[Problems to be solved by the invention]
However, in the case of a telescope in which the aiming device is attached to the lens hood, the lens hood is held by the objective lens barrel by frictional resistance. There is a problem in that the target object to be observed is lost due to misalignment.
[0008]
The present invention has been made in view of such circumstances, and an object thereof is to provide a telescope, a lens hood for a telescope, and a sighting device for a telescope, which can prevent a displacement of an aiming position after aiming.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 includes a telescope main body provided with an objective lens, and a positioning mechanism for positioning the telescope main body around the optical axis of the objective lens or in a direction orthogonal to the optical axis. An aiming device movably provided around the optical axis or in a direction orthogonal to the optical axis via the optical axis.
[0010]
The invention according to claim 2 is a lens hood main body detachable from a telescope main body having an objective lens, and a positioning mechanism for positioning the lens hood main body in a direction around an optical axis of the objective lens or in a direction orthogonal to the optical axis. And a sighting device movably provided around the optical axis or in a direction perpendicular to the optical axis via the optical axis.
[0011]
The invention according to claim 3 is an aiming device main body detachable from a telescope main body having an objective lens, and a positioning mechanism for positioning the aiming device main body in a direction around an optical axis of the objective lens or in a direction orthogonal to the optical axis. And an aiming member movably provided around the optical axis or in a direction orthogonal to the optical axis via the optical axis.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a perspective view of a telescope according to the first embodiment of the present invention.
[0014]
This telescope includes a telescope main body 10 and a lens hood 30.
[0015]
One end of the telescope body 10 has an eyepiece 12 and the other end has an objective lens 20.
[0016]
A pedestal 13 for attaching the telescope to a tripod (not shown) is provided below the telescope body 10 via an adapter.
[0017]
Further, a focusing ring 14 for focusing is rotatably arranged on the telescope body 10.
[0018]
At the tip of the objective lens 20, a lens hood 30 having a function of protecting the lens and preventing irregular reflection upon backlight and attachment of raindrops to the objective lens (referred to as a hood function) is integrally attached.
[0019]
The lens hood 30 is movable in the front-rear direction and rotatable.
[0020]
One aiming member 31 is formed on the outer peripheral surface of the lens hood 30. The aiming member 31 is formed, for example, by a long groove having a U-shaped cross section extending in the optical axis direction. The number of aiming members 31 is not limited to one, and may be one or more.
[0021]
FIG. 2 is a sectional view of the lens hood.
[0022]
The lens hood 30 is provided with a click stop mechanism (positioning mechanism) for stopping the lens hood 30 at a plurality of aiming positions.
[0023]
The click stop mechanism is formed at a plurality of positions (eight positions in FIG. 2) at predetermined angles on the hemispherical convex portion 32 formed on the inner peripheral surface of the lens hood 30 and the outer peripheral surface of the lens barrel 20a of the objective lens 20. And a groove 21. The outer peripheral surface of the lens barrel 20a of the objective lens 20 in which the groove 21 is formed is a plane 22 parallel to the optical axis.
[0024]
Note that a ball and a spring for urging the ball in the optical axis direction may be used in place of the hemispherical convex portion 32. Further, a hole may be formed instead of the groove 21.
[0025]
Further, instead of fitting the groove 21 and the convex portion 32, for example, a portion where the frictional force increases on the outer peripheral surface of the lens barrel 20a may be arranged at regular intervals.
[0026]
When changing the aiming position, the lens hood 30 may be rotated in a predetermined direction until the projection 32 falls into another groove 22.
[0027]
FIG. 3 is a sectional view of the lens hood.
[0028]
Felts (or cloths) 35 and 36 are arranged between the inner peripheral surface of the lens hood 30 and the outer peripheral surface of the lens barrel 20a of the objective lens 20.
[0029]
The felt 35 is attached to the inner peripheral surface of the rear end portion (right side in FIG. 3) of the lens hood 30, and the felt 36 is attached to the outer peripheral surface of the distal end portion (left side in FIG. 3) of the lens barrel 20a of the objective lens 20. Have been.
[0030]
Since appropriate frictional resistance can be generated between the lens hood 30 and the lens barrel 20a of the objective lens 20 by the felts 35 and 36, the lens hood 30 can be smoothly moved in the front-rear direction with an appropriate response. At the same time, the lens hood 30 can be smoothly rotated with an appropriate response.
[0031]
According to the first embodiment, the rotation of the lens hood 30 is prevented by the click stop mechanism even when, for example, an impact or the like is applied to the telescope after aiming. You never lose a thing.
[0032]
In the above embodiment, the lens hood 30 is integrally attached to the lens barrel 20a of the objective lens 20, but the present invention is not limited to this configuration. For example, a separate lens hood is attached to the lens barrel 20a of the objective lens 20 later. You may do so.
[0033]
In the above-described embodiment, the aiming member 31 is formed on the lens hood 30. However, an annular member (aiming device) having no aiming function but separate from the lens hood 30 has an aiming function. You may make it attach to.
[0034]
FIG. 4 is a perspective view of a telescope according to a second embodiment of the present invention, in which parts common to those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0035]
This embodiment differs from the first embodiment in that the aim is moved in a direction orthogonal to the optical axis.
[0036]
The aiming member 131 has, for example, a long groove 132 having a U-shaped cross section extending in the optical axis direction. The aiming member 131 is provided on the upper surface of the aiming device main body 135 attached to the distal end of the lens barrel 20a of the objective lens 20 so as to be movable in a direction orthogonal to the optical axis.
[0037]
A click stop mechanism for stopping the aiming member 131 at a plurality of aiming positions is provided on the upper surface of the aiming device main body 135.
[0038]
The click stop mechanism is composed of, for example, a hemispherical convex portion (not shown) formed on the lower surface of the sighting member 131 and concave portions 136 formed at a plurality of positions on the upper surface of the sighting device main body 135 at predetermined angles. .
[0039]
When changing the aiming position, the projection of the aiming member 131 may be moved until it falls into another recess 136.
[0040]
In the present invention, the “direction orthogonal to the optical axis” is not limited to the direction parallel to the upper surface of the aiming device main body 135 as shown in FIG. 135 includes a direction obliquely intersecting with the upper surface.
[0041]
According to the second embodiment, the same effects as those of the first embodiment can be obtained.
[0042]
【The invention's effect】
As described above, according to the telescope, the lens hood, and the aiming device of the present invention, it is possible to prevent the aiming position from shifting after aiming.
[Brief description of the drawings]
FIG. 1 is a perspective view of a telescope according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a lens hood.
FIG. 3 is a cross-sectional view of a lens hood.
FIG. 4 is a perspective view of a telescope according to a second embodiment of the present invention.
[Explanation of symbols]
10 Telescope body 20 Objective lens 30 Lens hood 31, 131 Aiming member 135 Aiming device body

Claims (3)

A telescope body with an objective lens,
An aiming device provided on the telescope main body so as to be movable around the optical axis or in a direction orthogonal to the optical axis via a positioning mechanism for positioning the objective lens around the optical axis or in a direction orthogonal to the optical axis. A telescope comprising: A lens hood body detachable from the telescope body with an objective lens,
An aim provided on the lens hood main body so as to be movable around the optical axis or in a direction perpendicular to the optical axis via a positioning mechanism for positioning around the optical axis of the objective lens or in a direction perpendicular to the optical axis. A lens hood for a telescope, comprising a device. An aiming device main body detachable from a telescope main body equipped with an objective lens,
An aim provided on the aiming device main body so as to be movable around the optical axis or in a direction orthogonal to the optical axis via a positioning mechanism for positioning the objective lens around the optical axis or in a direction orthogonal to the optical axis. An aiming device for a telescope, comprising:

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