JPH0247618A - Sight apparatus for binocular and telescope - Google Patents

Abstract

PURPOSE: To facilitate the searching of a target, and to instantaneously switch the magnification of a target picture after the target is searched by providing an auxiliary optical device. CONSTITUTION: A user performs observation through the binoculars 10 by using an aiming device, and a wide visual field without magnification is substance is give. A movable mirror 36 is on a first position, and an actually operating optical part reaches an eye through an auxiliary objective lens 30, a transparent board 40, an image transfer device, the movable mirror 36 and an eyepiece 20. Consequently, the give visual field includes a main enlarging optical path visual field indicating device 42 superposed on the board 40 and supported on the board 40. The user can move the binoculars 10 till the desired target comes inside the device 42, the optical path passing through the aiming device can be interrupted by moving the mirror to a second position, and the actually operating optical path is the one passing through a main enlarging device 26. Thus, target searching can be facilitated, and the magnification can be instantaneously switched in the case the target is searched once.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to telescopes and binoculars, and more particularly, it facilitates finding a target and instantaneously changes the magnification of the target image after the target is found. The present invention relates to a novel aiming device for the above-mentioned device, such that it can be used to

BACKGROUND OF THE INVENTION Binoculars typically have a magnification capability, i.e., a magnification range of 6x to 10x, and at the latter magnification the field of view is considerably limited.

Therefore, if one wishes to locate a target, such as an airplane in the air or a buoy at sea, it is necessary to scan the field of view in a more or less arbitrary manner, searching with binoculars until the target is acquired. In this case, a general overall search for the target can be performed with the naked eye, but it is still necessary to locate the target using binoculars with magnification. Because your field of vision is limited,
This is a particularly difficult task when the target is small or moving.

A zoom lens system may also be used, with the lower magnification used first to locate the target and then the magnification increased as desired. Achieving the desired magnification is time consuming since the relative positions of the optical elements within the zoom lens system are changed to perform the magnification. During this time, there is a risk that the target will leave the field of view, making it necessary to search for the target again. Additionally, zoom lenses have relatively sophisticated and complex structures that make them expensive to manufacture, cannot withstand rough handling, and are susceptible to failure under harsh or malfunctioning conditions. Furthermore, such lenses are bulky and add weight, which also increases the cost of the binoculars.

Therefore, it is desired to provide a sighting device for binoculars and telescopes that facilitates finding a target and can instantaneously change the magnification when a -degree target is found.

[Problems to be Solved by the Invention] Among the several objects of the present invention, the main purpose of the present invention is to provide a novel aiming device for a binocular-applied telescope that facilitates target searching and target magnification. It is a purpose.

Other objects and features of the invention are partly apparent from the above and partly explained below.

Means for Solving the Problems According to the invention, binoculars of conventional construction are provided with an auxiliary optical device that facilitates the locating of targets. The main magnifying optics or optical path of binoculars consists essentially of a main objective lens of magnification, a prism, and an eyepiece of appropriate magnification forming an eyepiece.

The auxiliary aiming optics includes an auxiliary objective close to and on the inner surface of the main objective. A transparent plate is placed on the focal plane of the auxiliary objective, and a circle delimiting the field of view of the main magnifying device is marked on this transparent plate for the observer, or other indicators are provided on this transparent plate. There is. An image transfer device located between the transparent plate and the eyepiece bridges the gap formed between the image plane of the auxiliary objective and the focal plane of the eyepiece (of the main optical system), so that the normal field of view is It is designed to give the observer 1x magnification.

A movable mirror is arranged in the optical path of the main magnifying device between the prism and the eyepiece, and in the optical path of the aiming device between the image transfer device and the eyepiece. moving the mirror from a first position in the optical path of the aiming device and blocking the optical path of the main magnifying device to a second position blocking the optical path of the aiming device and opening the optical path of the main magnifying device; An operating mechanism is provided for this purpose.

Operation: The user first looks through the binoculars using the sighting device and is given a wide field of view with virtually no magnification. The movable mirror is in a first position and the active optical path is from the movable mirror through the eyepiece through the auxiliary objective, the transparent plate and the image transfer device to the eye.

The field provided thereby includes a main magnifier @ field indicator superimposed on the transparent plate and supported on the transparent plate. The user can move the binoculars until the desired target is within the field indicator. The user then moves the mirror to a second position, thereby blocking the light path through the aiming device and making the active light path through the main magnifying device.

As a result, the area within the visual field indicator is magnified to the magnification of the main magnifying device and appears within the user's visual field.

The invention includes structures as described below, and the scope of the invention is limited only by the claims.

EXAMPLE Binoculars incorporating the present invention are indicated generally by the numeral 10 in FIG. As will become clear from the following description, the aiming device of the invention is suitable for use in conventional prism binoculars. Due to the hour wheel, only those binocular elements necessary for a complete and clear understanding of the invention will be described below. Furthermore, the invention is also suitable for use with conventional telescopes, where the terms binocular and telescope are used interchangeably.

The illustrated prism binoculars 10 have two lens barrels: a barrel 1;
2, each of which houses the main magnifying optical system of the main magnifying optical device of the binoculars. The structure of the aiming device and the details of its interaction with the main magnifying device of the binoculars can best be understood with reference to FIG. It includes a main objective lens 14, prism sets 16 and 18, and an eyepiece lens 20, which are operated as described above.

The auxiliary aiming device 28 preferably has an auxiliary objective 3 of the same focal length as the eyepiece 20 mounted at the front of the binoculars, preferably in the same plane as and close to the main objective 14.
Contains 0. This auxiliary objective 30 has a relatively small diameter compared to the main objective 14 and is equal to or slightly larger than the diameter of the eyepiece 20. The images produced by the auxiliary objective lens 30 are of the 1x and 2x focal type e! l<in relation to the distance to the target)
appear between. Since the eyepiece 20 is in a fixed position relative to the lens 30, a gap exists between the image plane of the lens 30 and the focal plane of the eyepiece 20. Therefore, an image transfer device is used to bridge this optical gap, which connects one or two lenses 32 of the appropriate focal length.
．． 34, the aiming device consisting of the lens 30, the transfer lens 32, 34 and the eyepiece 20 can be adapted to obtain a magnification of 1x. The focal length of the auxiliary objective lens 30 is equal to the focal length of the lens 20. Lenses 32 and 34 are arranged such that the optical system constituted by lenses 30, 32, 34 and 20 provides 1x magnification to an observer with a normal field of vision.

Slight deviations from these standards, which occur because the image of the auxiliary objective 30 can be in different positions in relation to the distance to the viewed target, are illuminating! ! This may have the effect that the target viewed through the device is slightly magnified. However, this does not detract from the present invention.

Spatial limitations affecting the arrangement of components within the binocular barrel 12 make using a single transfer lens impractical. With continued reference to FIG. 2, the transfer lens apparatus includes a first transfer lens 32 and a second transfer lens 34, with a mirror 36 disposed intermediate these lenses to reflect light at a 45 degree angle. to help configure the optical path of the aiming device to the eyepiece. The transfer lenses 32 and 34 also invert the image, which is similar to the prism arrangement 3.
8, this prism device acts in a similar way to the prism device in the main magnification optics. It should also be understood that the image transfer device could consist of a fiber optic image conduit 39 (coherent fiber optic bundle) as shown in FIG. 3 instead of transfer lenses 32 and 34 and mirror 36.

A transparent plate 4o is arranged at the focal plane of the auxiliary objective lens 3o. This plate 40 supports an indicator 42, which indicates to a person viewing through the aiming device the field of view of the main magnifying device at that moment. This indicator can be a simple circle marked on the board, a colored disc or any other conventional device.

A device is provided which allows the user to almost instantaneously switch the optical path from the aiming device to the main magnifying device. The main magnifying device and aiming device are positioned in the optical path of the main magnifying device such that a movable mirror 44 can pass light from the prism 18 to the eyepiece 20 or such that the movable mirror 44 can pass light from the prism 38 to the eyepiece 20. and arranged in such a way that it can be placed in the optical path of the aiming device.

An actuation mechanism 46 similar to that used in single-lens reflex cameras moves mirror 44 between a first position and a second position. Mirror 44 is in the first digit N
When at (48 in FIG. 2), the mirror blocks light passing through the main magnifier. The actual optical path operative in this case is through the aiming device, i.e. auxiliary objective 30, transparent plate 3
8. The optical path passes through the transfer lenses 32 and 34, the prism 36, and passes from the mirror 44 to the eyepiece 2o.

In this situation, a user viewing through binoculars is presented with a field of view that is hardly magnified.

This field of view includes a main field of view indicator to facilitate target locating. When the actuation mechanism is actuated, for example by pressing button 50, mirror 44 is moved to the second position (
2, the main magnifying beam path is activated by blocking the optical path through the aiming device and opening the main magnifying beam path. The area visible within the field-of-view indicator of the aiming device now appears as a field of view magnified by the magnification of the main magnifying device.

As mentioned above, the actuation mechanism may be of conventional construction known to those skilled in the art. As shown, this actuation mechanism can be actuated by a push button, in which case the movable mirror 44
is normally in a first position, moves to a second position when the activation button is pressed, and remains in that position while the button is pressed. Alternatively, movable mirror 44 may be normally in the second position and moved to the first position when the actuation button is pressed.

The above-mentioned aiming device is effective if it is only provided on one barrel of the binoculars. However, sighting devices can optionally be provided on both barrels.

Some advantages of the present invention, which are evident from the foregoing description, are that it facilitates target locating and also allows instantaneous enlargement of the target after it has been located. Includes an aiming device for the binoculars that makes it possible to locate the binoculars.

From the foregoing, it will be seen that certain objects of the invention are achieved and other advantages are obtained.

All matters shown in the above description or the accompanying drawings are illustrative only and are not intended to limit the invention, since modifications of the seed rod may be made to the configuration described above without departing from the scope of the invention. It is intended that this is not the case.

[Effects of the Invention] Since the present invention is configured as described above, the user of the binoculars can easily find a target by using the binoculars with a wide field of view with 1x magnification, and can easily find a target by -degrees. After that, by simply pressing the activation button, the magnification can be instantly increased to provide binoculars that allow detailed observations to be made immediately.

[Brief explanation of the drawing]

FIG. 1 is a side view, partially in section, of ordinary prism binoculars to which the present invention is applied. FIG. 2 is an enlarged explanatory diagram of the optical system of the binoculars shown in FIG. 1. FIG. 3 is a schematic explanatory diagram of an image transfer device according to a modified embodiment of the present invention. 1o... Binoculars 12... Barrel 14... Main objective lens 16.18... Prism set 20... Eyepiece 26... ...Main magnifying optical device 28...Auxiliary aiming device 30...Auxiliary objective lens 32.34...Lens 36 in the image transfer device...
... Mirror 38 ... Prism device 39 ... Fiber optical image conduit 40 ...
・Transparent plate 42... Main enlarged optical path visual field indicator 44...
... movable mirror 46 ... actuation mechanism 48 ... first position 50 ... push button 52 ... second position

Claims (1)

[Scope of Claims] (1) (a) A main objective lens and an eyepiece constituting a main expansion optical path having a fixed magnification of 6 to 10 times; (b) an auxiliary objective lens; (c) a first and a light directing device including a mirror movable between second positions, the mirror being moved from the first position to the second position;
and an actuation device for instantaneously moving the movable mirror from the second position to the first position, the movable mirror passing through the auxiliary objective lens in the first position. reflecting the light from the main magnifying optical path to the focal plane of the eyepiece to allow a substantially unmagnified field of view through the eyepiece; and opening the main magnification optical path so that a magnified target image can be viewed through the eyepiece. (2) further comprising a main magnifying optical path field of view indicator located between the auxiliary objective lens and the eyepiece, wherein when the optical path passing through the objective lens and the field of view indicator is interrupted, the field of view indicator is 2. A telescope as claimed in claim 1, wherein said telescope is adapted to bound an area viewed through said main magnifying optical path. (3) the light directing device includes a movable mirror and an actuation device for moving the mirror between first and second positions; the movable mirror is in the first position and the auxiliary objective Reflecting the light passing through the lens onto the focal plane of the eyepiece to block the main magnifying optical path, and opening the main magnifying optical path by blocking the optical path passing through the auxiliary objective lens at the second position and magnifying it. 2. The telescope according to claim 1, wherein a target image obtained through the eyepiece can be viewed through the eyepiece. (4) The field-of-view indicating device includes a transparent plate in the focal plane of the auxiliary objective and a device on the plate for indicating the area surrounded by the main magnifying optical path. Telescope described in 2. (5) The telescope according to claim 4, wherein the indicating device is a circle marked on the plate. 6. The telescope of claim 4, wherein said pointing device is a transparent colored disc. (7) Disposed between the auxiliary objective lens and the eyepiece lens, communicating the gap between the image plane of the auxiliary objective lens and the focal plane of the eyepiece lens, and providing a 1x 2. The telescope of claim 1, further comprising a transfer lens arrangement forming an optical arrangement providing magnification. (8) The telescope according to claim 1, further comprising a prism located in the optical path of the auxiliary objective lens and the eyepiece lens to correct image inversion. (9) Disposed between the auxiliary objective lens and the eyepiece lens, communicating the gap between the image plane of the auxiliary objective lens and the focal plane of the eyepiece lens, and providing a 1x 2. The telescope of claim 1 further comprising an image transfer device including a fiber optic image conduit providing magnification. (10) In an aiming device for a hand-held telescope having a main magnifying optical path that includes a main objective lens and an eyepiece and has a fixed magnification of 6x to 10x, the aiming device is (a) close to the main objective lens; (b) a movable mirror; and (c) an actuation device for instantaneously moving the mirror between a first and a second position, the mirror being in the first position. reflects the light passing through the auxiliary objective onto the focal plane of the eyepiece to allow a substantially unmagnified field of view of the target image, interrupts the main magnification optical path, and
the actuating device for blocking the optical path through the auxiliary objective and opening the main magnification optical path at a position such that a target image is visible through the eyepiece. (11) The aiming device according to claim 10, further comprising a main enlarged optical path field of view indicator disposed between the auxiliary objective lens and the eyepiece. 12. The aiming device of claim 11, wherein said field-of-view indicating device includes a transparent plate in the focal plane of said auxiliary objective lens and a device on said plate for indicating the field of view of said main expansion optical path. (13) The aiming device according to claim 12, wherein the pointing device is a circle marked on the plate. 14. The aiming device of claim 12, wherein the pointing device is a transparent colored disc. 15. The aiming device according to claim 10, further comprising a prism located in the optical path of the objective lens and the eyepiece lens to correct image reversal. (16) Disposed between the objective lens and the eyepiece lens, communicating the gap between the image plane of the auxiliary objective lens and the focal plane of the eyepiece lens, and providing 1x magnification to the observer in a normal field of view. 11. The aiming device of claim 10, further comprising a transfer lens arrangement forming an optical arrangement for providing. (17) A gap between the image plane of the objective lens and the focal plane of the eyepiece is provided between the auxiliary objective lens and the eyepiece lens, and a magnification of 1x is provided to the observer in a normal visual field. 11. The aiming device of claim 10, further comprising an image transfer device including a fiber optic image conduit for providing a fiber optic image conduit.