Patent Description:
Binoculars, also known as a "binocular telescope", is a telescope composed of two monocular telescopes side by side, in which the distance between two eyepieces can be adjusted to facilitate observation by both eyes at the same time, thereby realising three-dimensionality, which is often used in navigation, military surveillance, field observation, and so on.

Eyepieces and objectives on inner sides of lens barrels at both ends of an existing binocular telescope are directly exposed to the outside, so water vapour may adhere to their surfaces. In addition, as the water vapour may cause dust to adhere to their surfaces, it is easy to cause dust particles to exist on lenses after a long time of use, and it is inconvenient to wipe, resulting in the lenses becoming more and more blurred, which seriously affects the service life of the telescope.

<CIT> disclosed a binocular telescope with digital laser ranging function, comprising an objective component, a beam splitter and coincidence prism system and an ocular component.

<CIT> disclosed an optical binocular in which optical components including image-erecting prisms or mirrors are mounted in a body of plastic foam material.

<CIT> disclosed a sighting device for small arms comprising a holder which at one end carries a light transmitting mirror and at its other end a first light emitter.

<CIT> disclosed a sunlight-filtering ocular adapter for telescopes which comprises a planar green glass filter for filtering out harmful ultra-violet and infra-red rays.

<CIT> disclosed binoculars provided with an image stabilizing function (image blur correcting function) to reduce image blur caused by hand jiggling or the like.

An object of the present invention is to provide a binocular telescope with digital display and laser ranging functions, so as to solve the above problems proposed in the background art.

In order to achieve the above object, the present invention provides the technical solution that is set out in the appended set of claims.

The technical effects and advantages of the present invention are as follows:.

In the <FIG> - binocular telescope body; <NUM> - adjustment shaft; <NUM> - mounting groove; <NUM> - limiting block; <NUM> - glass sheet; <NUM> - limiting plate; <NUM> - dial block; <NUM> - thread; <NUM> - first lens; <NUM> - second lens; <NUM> - composite prism; <NUM> - first right-angle prism; <NUM> - isosceles prism; <NUM> - second right-angle prism; <NUM> - beam-splitting face A; <NUM> - reflection and transmission face; <NUM>-third right-angle prism; <NUM> - beam-splitting face B; <NUM> - roof prism; <NUM> - roof prism reflection and transmission face; <NUM> - roof prism reflection face; <NUM> - third lens; <NUM> - fourth lens; <NUM> - fifth lens; <NUM> - sixth lens; <NUM> - seventh lens; <NUM> - eighth lens; <NUM> - incident ray; <NUM> - transmission-type display device; <NUM> - display; <NUM> - detector A; <NUM> - detector B; <NUM> - imaging lens A; <NUM> - plane mirror; <NUM> - imaging lens B; <NUM> - exit optical axis A; <NUM> - exit optical axis B; <NUM> - incident optical axis of display; <NUM> - emission device.

The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings for the embodiments of the present.

The present invention provides a binocular telescope with digital display and laser ranging functions as shown in <FIG>. The binocular telescope includes:.

A mounting groove <NUM> and a limiting block <NUM> are provided on an inner side of the binocular telescope body <NUM>, the mounting groove <NUM> and the limiting block <NUM> are both fixedly connected to the inner side of the binocular telescope body <NUM>, and the mounting groove <NUM> is provided on an outer side of the limiting block <NUM>. The limiting block <NUM> is provided on the inner side of the binocular telescope body <NUM> to facilitate limiting of the glass sheet <NUM>. The limiting block <NUM> is provided in a ring shape and is provided on an inner side of an objective barrel of the binocular telescope body <NUM>. After the glass sheet <NUM> is placed in the objective barrel, the arrangement of the limiting block <NUM> can effectively limit the glass sheet <NUM> in a clamping manner. With the arrangement of the mounting groove <NUM> which is provided with a thread on its inner side, it is convenient to threadingly and fixedly connect the limiting plate <NUM> to the inner side of the mounting groove <NUM>, so as to limit the glass sheet <NUM>.

As shown in <FIG> and <FIG>, under the condition that a composite prism <NUM> is composed of an isosceles prism <NUM>, a first right-angle prism <NUM> and a second right-angle prism <NUM>. In the present invention, a visible ray imaged by an objective enters a roof prism <NUM> along an optical axis <NUM>, is reflected by a roof prism reflection (internal reflection and external reflection) and transmission face <NUM>, then is reflected by a roof prism reflection face <NUM>, exits from the roof prism reflection (internal reflection and external reflection) and transmission face <NUM> of the roof prism <NUM>, and enters a composite prism <NUM> composed of the first right-angle prism <NUM>, the isosceles prism <NUM> and the third right-angle prism <NUM>. The ray passes through a beam-splitting face B607, is reflected by a reflection and transmission face <NUM>, and reaches another beam-splitting face A604. The ray in the visible light spectrum directly passes through the beam-splitting face A604, exits from the first right-angle prism <NUM>, and reaches an observation focal plane along an exit optical axis <NUM>. A laser ray reflected by a measured target for ranging is reflected off the beam-splitting face A604, exits from a reflection and transmission face <NUM> of the isosceles prism <NUM>, and reaches a detector A14. Due to the reversibility of optical paths, in one of two optical paths of the laser ranging binocular telescope, an emission device <NUM> may be mounted in a position equivalent to that of the detector A14, so it is possible that the laser is emitted from this objective as a collimated beam. In this way, the group of prisms can transfer a visible light image from the objective to the eyepiece for observation by eyes, and at the same time the ranging can be implemented with a laser beam.

An outer side of the limiting plate <NUM> is provided with a thread <NUM>, the thread <NUM> is provided in concert with the mounting groove <NUM>, the limiting plate <NUM> is threadingly and fixedly connected to an inner side of the mounting groove <NUM> with the thread <NUM>, and dial blocks <NUM> are symmetrically and fixedly connected to two ends on the outer side of the limiting plate <NUM>. The inner side of the limiting plate <NUM> is hollowed out, and the outer side is used to limit the glass sheet <NUM>, which will not affect viewing. With the arrangement of the thread <NUM>, it is convenient to threadingly and fixedly connect the limiting plate <NUM> to the inner side of the mounting groove <NUM>. With the dial blocks <NUM> being provided on the outer side of the limiting plate <NUM>, it is convenient to pinch the dial blocks <NUM> on both sides so as to rotate the limiting plate <NUM>.

An objective assembly, a beam-splitting and image-combining prism system and an eyepiece assembly are provided on the inner side of the binocular telescope body <NUM>, the beam-splitting and image-combining prism system is provided between the objective assembly and the eyepiece assembly, and the beam-splitting and image-combining prism system includes a composite prism <NUM> and a roof prism <NUM>. An object to be observed at a distance can be imaged through the objective assembly. A visible light image formed by the objective assembly and a red light image of a display <NUM> may be observed at the same time through the eyepiece assembly. The beam-splitting and image-combining prism system may transmit rays, so as to facilitate transmission of images obtained from the objective assembly to the eyepiece assembly for observation.

As shown in <FIG> and <FIG>, the composite prism <NUM> is composed of the first right-angle prism <NUM>, the isosceles prism <NUM> and the second right-angle prism <NUM>, where the first right-angle prism <NUM> and the second right-angle prism <NUM> have the same shape and symmetrically abut on two isosceles faces of the isosceles prism <NUM>, respectively. Wherein the beam-splitting face A is formed by coating a beam splitting film on the hypotenuse faces of the first right-angle prism, and the beam-splitting face B is formed by coating a beam splitting film on the hypotenuse faces of the second right-angle prism.

An imaging lens B18 in parallel to an reflection and transmission face <NUM> is arranged at a distance from the reflection and transmission face <NUM> of the isosceles prism <NUM>, and arrange a plane mirror <NUM> and an imaging lens A16 located on the plane mirror light axis; a display <NUM> is arranged above a roof prism reflection (internal reflection and external reflection) and transmission face <NUM>, the image of the display <NUM> is reflected to the imaging lens A16 along the incident optical axis <NUM> of display through the roof prism reflection and transmission face <NUM>, the image is projected and reflected on the beam-splitting face B607 after passing through the plane mirror <NUM> and then the imaging lens B18; a detector A14 is arranged in parallel above the reflection and transmission face <NUM> of the isosceles prism <NUM>, the outside of the first right-angle prism <NUM> is provided with an observation focal plane, the detector A14 is imaged by an exit optical axis A19, the observation focal plane is imaged by an exit optical axis B20, and both of them are intersected on the beam-splitting face A604.

The requirements for the coating of the beam splitting surface A and the beam splitting surface B include the following: under the condition that a wavelength is <NUM>~<NUM>±<NUM>, Tave≥<NUM>%, Tmin≥<NUM>%, T550≥<NUM>%; under the condition that the wavelength is <NUM>~<NUM>±<NUM>, Tave≥<NUM>%, Tave is the average transmittance, Tmin is the minimum transmittance, T550 is the transmittance when the wavelength is <NUM>; full-surface coating on the hypotenuse face of the first right-angle prism and the second right-angle prism. As a result, the blue spot in the center of the field of view can be effectively avoided, and the observation effect is effectively improved; the color reproduction is improved, and the color is no longer bluish; the wavelength of the beam splitting film is more matched with the wavelength of the LED display, and the parameter display during use is brighter and clearer; the transmittance has increased by <NUM>%, the brightness of the observed scene has been improved, and the transmittance difference between the left and right barrels of the telescope, has become smaller, reducing visual fatigue during observation.

The objective assembly includes a third lens <NUM>, a fourth lens <NUM> and a fifth lens <NUM>. The third lens <NUM>, the fourth lens <NUM> and the fifth lens <NUM> are all provided in a same axial direction. The eyepiece assembly includes a first lens <NUM> and a second lens <NUM>. The first lens <NUM> and the second lens <NUM> are both provided in a same axial direction. A sixth lens <NUM> and seventh lens <NUM> are provided between the first lens <NUM> and the second lens <NUM>, the sixth lens <NUM> and the seventh lens <NUM> are cemented together. An eighth lens <NUM> is provided between the second lens <NUM> and the composite prism <NUM>. The eyepiece assembly has a total of five lenses, increased from the original three to five. The eighth lens <NUM> and the other four lenses are assembled on both sides of a diaphragm. The eighth lens <NUM> is fixed with glue. The other four lenses are fixed by a metal diaphragm and a spacer matched with an eyepiece barrel. The material of the entire eyepiece assembly is ZK9B and ZF52 high-refractive materials. For the entire eyepiece assembly, in terms of the imaging effect, the phase difference is reduced, the flat field is improved, the chromatic aberration is reduced, the degree of colour reproduction is increased, and the distortion is also reduced. The seventh lens not only plays a role of imaging in the entire eyepiece optical system, but also plays a role of a diaphragm in eliminating stray light, which improves the use effect.

As shown in <FIG> and <FIG>, an angle α of the roof prism <NUM> is <NUM>° to <NUM>°, an angle β of the first right-angle prism <NUM> and that of the second right-angle prism <NUM> are <NUM>° to <NUM>°, and an angle δ of the isosceles prism <NUM> is <NUM>° to <NUM>°. The angle α of the roof prism <NUM> is preferably <NUM>°, the angle β of the first right-angle prism <NUM> and that of the second right-angle prism <NUM> are preferably <NUM>°, and the angle δ of the isosceles prism <NUM> is preferably <NUM>°.

As shown in <FIG>, <FIG> and <FIG>, the beam-splitting and image-combining prism system comprises a composite prism <NUM> and a roof prism <NUM>, and the composite prism <NUM> is composed of a first right-angle prism <NUM> and a third right-angle prism <NUM>, wherein , a right-angle face of the third right-angle prism <NUM> is longer than a hypotenuse face of the first right-angle prism <NUM>, and the right-angle face of the third right-angle prism <NUM> abuts on the hypotenuse face of the first right-angle prism <NUM>;
The composite prism <NUM> has only one beam-splitting face A604, a detector B15 is arranged in parallel on a reflection and transmission face <NUM> of the third right-angle prism <NUM>, the observation focal plane on the outside of the first right-angle prism <NUM> is provided with a transmission-type display device <NUM>, and the transmission-type display device <NUM> may be an LCD or an OLED. The transmission-type display device <NUM> may display the graphics and text information as: graphs, signs, symbols, or characters.

The reflection and transmission face <NUM> and the beam-splitting face A604 are provided on an inner side of the composite prism <NUM>. A roof prism reflection (internal reflection and external reflection) and transmission face <NUM> and a roof prism reflection face <NUM> are provided on an inner side of the roof prism <NUM>. An incident ray <NUM> is transmitted inside the binocular telescope body <NUM>, and the incident ray <NUM> passes through the objective assembly from a side of an objective of the binocular telescope body <NUM>, then passes through the beam-splitting and image-combining prism system, and finally passes through the eyepiece assembly to reach eyes, where a transmission direction in the beam-splitting and image-combining prism system is as follows: the incident ray <NUM> passes through the roof prism <NUM> and is transmitted to the roof prism reflection (internal reflection and external reflection) and transmission face <NUM>, is reflected by the roof prism reflection (internal reflection and external reflection) and transmission face <NUM> onto the roof prism reflection face <NUM>, then is reflected by the roof prism reflection face <NUM> to the first reflection and transmission face <NUM>, and passes through the beam-splitting face A604 into the eyepiece assembly and thus into the eyes.

Wherein, the beam-splitting face A604 is formed by coating the entire hypotenuse face of the first right-angle prism <NUM> with a beam-splitting film. The requirements for the coating of the beam splitting surface A604 include the following: under the condition that a wavelength is <NUM>~<NUM>±<NUM>, Tave≥<NUM>%, Tmin≥<NUM>%, T550≥<NUM>%,; under the condition that the wavelength is <NUM>~<NUM>±<NUM>, Tave≥<NUM>%, Tave is the average transmittance, Tmin is the minimum transmittance, T550 is the transmittance when the wavelength is <NUM>.

In the present invention, a visible ray imaged by the objective enters the roof prism <NUM> along the optical axis, is reflected by the roof prism reflection (internal reflection and external reflection) and transmission face <NUM> then is reflected by the roof prism reflection face <NUM>, exits from the reflection (internal reflection and external reflection) and transmission face <NUM> of the roof prism <NUM>, and enters the composite prism <NUM> composed of the first right-angle prism <NUM> and the third right-angle prism <NUM>. The ray reaches a beam-splitting face A604. The ray in the visible light spectrum directly passes through the beam-splitting face A604, exits from the right-angle prism <NUM>, and reaches, along an exit optical axis B20, an observation focal plane on which the transmission-type display device <NUM> is provided. A laser ray reflected by a measured target for ranging is reflected off the beam-splitting face A604, exits from the reflection and transmission face <NUM> of the third right-angle prism <NUM> and reaches a detector B15. Due to the reversibility of optical paths, in one of two optical paths of the laser ranging binocular telescope, an emission device <NUM> may be mounted in a position equivalent to that of the detector, so it is possible that the laser is emitted from this objective as a collimated beam. In this way, the group of prisms can transfer a visible light image from the objective to the eyepiece for observation by eyes, and at the same time the ranging can be implemented with a laser beam.

A lens coating method for a binocular telescope with digital display and laser ranging functions includes:.

Claim 1:
A binocular telescope with digital display and laser ranging functions, comprising:
a binocular telescope body (<NUM>), with an adjustment shaft (<NUM>) for adjusting an angle of the binocular telescope body (<NUM>) being provided in the middle of the binocular telescope body (<NUM>);
a glass sheet (<NUM>) for shielding and protecting internal components of the binocular telescope body (<NUM>); and
a limiting plate (<NUM>) for limiting and fixing the glass sheet (<NUM>);
characterized in that a mounting groove (<NUM>) and a limiting block (<NUM>) are provided on an inner side of the binocular telescope body (<NUM>), the mounting groove (<NUM>) and the limiting block (<NUM>) are both fixedly connected to the inner side of the binocular telescope body (<NUM>), and the mounting groove (<NUM>) is provided on an outer side of the limiting block (<NUM>); and
an outer side of the limiting plate (<NUM>) is provided with a thread (<NUM>), the thread (<NUM>) is provided in concert with the mounting groove (<NUM>), the limiting plate (<NUM>) is threadingly and fixedly connected to an inner side of the mounting groove (<NUM>) with the thread (<NUM>), and dial blocks (<NUM>) are symmetrically and fixedly connected to two ends on the outer side of the limiting plate (<NUM>),
wherein the inner side of the limiting plate (<NUM>) is hollowed out.