Compound prism based on isosceles prism and its laser ranging telescope

Abstract

The present invention provides a compound prism based on an isosceles prism and a laser distance measuring telescope using the compound prism. [Solution] The present invention discloses a compound prism based on an isosceles prism and a laser distance measuring telescope using the compound prism. The compound prism of the present invention comprises a first prism, a second prism, a third prism, and a compensation prism. The first prism is an isosceles prism with three reflecting surfaces, the second prism is a roof prism, the third prism is a half pentaprism, and the compensation prism is a wedge prism. The compound prism rationally combines the observation system, laser projection system, laser receiving system, aiming system, and display system, resulting in a telescope with diverse performance and structural form, a small volume, and easy portability.

Description

[Technical field]

[0001] The present invention relates to the field of telescopic distance measurement, and in particular to a compound prism based on an isosceles prism and a laser distance measurement telescope using said compound prism. [Background technology]

[0002] Current telescopes are not fashionable consumer products, but are used for observation, and some telescopes have the function of measuring the distance and speed to an object by emitting a laser beam at high speed, making them an indispensable measurement tool. The first prism of the prism pair of the binocular distance measuring telescopes disclosed in Patent Documents 1 and 2 has only two reflecting surfaces, and the propagation direction of the light beam determined by this is not conducive to the installation of the laser emitter, the laser receiver, and the projector. The laser emitter and the laser receiver are difficult to install on the side close to the central axis of the telescope barrel, which has limited the diversity of the structural form and function of distance measuring telescopes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Patent Application No. CN105806308A [Patent Document 2] Chinese Patent Application No. CN107219621A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to obtain a distance measuring telescope with a compact structure, small volume, and versatile functions and structural forms, the present invention provides a compound prism based on an isosceles prism, and a laser distance measuring telescope using the compound prism. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention employs the following technical means.

[0006] A composite prism based on an isosceles prism comprising a first prism, a second prism and a third prism, wherein the first prism is an isosceles prism having three reflecting surfaces, the second prism is a roof prism and the third prism is a half pentaprism, the third surface III of the third prism is bonded to the third surface I of the first prism and the bonded surface is coated with a spectral film, and light of a first wavelength enters the first surface I of the first prism, is reflected successively by the second surface I, the third surface I and the first surface I of the first prism, then exits from the second surface I of the first prism and enters the first surface II of the second prism, is further reflected by the roof surface and the first surface II of the second prism and exits from the third surface II.

[0007] Furthermore, the above technical means further includes a compensation prism, the second surface IV of the compensation prism being bonded to the second surface III of the third prism, and the bonded surface being coated with a spectral film, so that light of the second wavelength enters the first surface I of the first prism, is reflected by the second surface I of the first prism, passes through the third surface I and enters the third prism, is further reflected by the second surface III of the third prism, and exits from the first surface III of the third prism.

[0008] The light of the second wavelength enters the first surface III of the third prism, is reflected by the second surface III of the third prism, enters the first prism via the third surface III, is reflected by the second surface I of the first prism, and then exits from the first surface I of the first prism.

[0009] Furthermore, the compensation prism of the present invention can also be installed in this manner, with the second surface IV of the compensation prism bonded to the third surface I of the first prism, and the first surface IV of the compensation prism bonded to the third surface III of the third prism, such that the bonding surface between the compensation prism and the third prism is perpendicular to the optical axis of the light beam of the second wavelength.

[0010] A laser distance measuring telescope using the above-mentioned composite prism also includes an objective lens, an eyepiece lens, a laser device, a laser receiver, and a projector. The laser device and the laser receiver are provided on the optical path where the light of the second wavelength enters / exits the third prism.

[0011] The objective lens, compound prism and eyepiece lens form a telescope. The laser projection system is made up of a laser device, compound prism and objective lens. The laser receiving system is made up of an objective lens, compound prism and laser receiver. The projector consists of a reflector and a lens. The display is placed on the side of the first prism.

[0012] The display is used to display the reticle pattern and measurement information of the laser range finder telescope. The third wavelength light emitted from the display is reflected by the first reflector, passes through the lens, is then reflected by the second reflector and enters the compensation prism of the right barrel, passes through the compensation prism and the third prism, and enters the first prism, then merges with the first wavelength light beam of the first prism, and finally forms an image on the display at the focal plane position of the objective lens of the right barrel.

[0013] The first wavelength of light from the object enters the telescope through the objective lens, and the image is erected by a compound prism, and then the object is imaged at the focal plane of the objective lens. The image of the object in the right telescope tube is superimposed on the image on the display. The image is then zoomed in through the eyepiece lens, allowing the object to be viewed and aimed at.

[0014] The second wavelength light from the laser device enters the laser projection system through the first surface III of the third prism, is collimated by the objective lens, and is then projected toward the target object through the telescope.

[0015] The second wavelength light reflected by the target object is collected by the objective lens of another telescope and enters the laser receiving system. The laser ranging telescope calculates the object distance from the process of emitting the laser light to the object to receiving the laser light, and displays the related information on the display.

[0016] If the range finder telescope does not use a projector, a reticle display mirror can be provided between the eyepiece and the compound prism. The reticle display mirror can be a transmissive LCD or OLED. The projector display is replaced by a light source used to illuminate the LCD reticle display mirror at night.

[0017] The compensation prism is bonded between the first prism and the third prism, and the bonding surface between the compensation prism and the first prism is coated with a spectral film that reflects light of the first wavelength and transmits light of the second and third wavelengths. The bonding surface between the compensation prism and the third prism is perpendicular to the optical axis of the light of the second wavelength. The third prism and the compensation prism can be made of different glass materials. The second surface III of the third prism is a non-bonded surface, and does not need to be coated with a reflective film or a spectral film, so that the light propagation efficiency of the second wavelength can be further improved. Effect of the Invention

[0018] In the optical system of a laser ranging telescope, a compound prism based on an isosceles prism rationally combines the observation system, laser projection system, laser receiving system, aiming and display system, and allows both the laser device and the laser receiver to be mounted closer to the central axis of the telescope, thereby diversifying the performance and structural form of the laser ranging telescope and reducing its volume. [Brief description of the drawings]

[0019] [Figure 1] 1 is a schematic diagram showing an optical system of a binocular laser distance measuring telescope of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing a composite prism and a projector of the present invention. [Diagram 3] FIG. 1 is a schematic diagram showing the optical system of a binocular laser range finder telescope with an LCD reticle display mirror enabled. [Figure 4] FIG. 1 is a schematic diagram showing the optical system of a monocular laser range finder telescope. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0020] Please refer to Figures 1 and 2. This binocular distance measuring telescope includes two objective lenses 6, two eyepiece lenses 1, two compound prisms, a laser device 7, a laser receiver 8, and a projector. These are combined via the compound prism to form the optical system of the binocular distance measuring telescope.

[0021] The composite prism includes a first prism 2, a second prism 3, a third prism 4, and a compensation prism 5, and the first prism 2 is an isosceles prism, the second prism 3 is a roof prism, the third prism 4 is a half pentaprism, and the compensation prism 5 is a wedge prism. The third surface III403 of the third prism 4 is bonded to the third surface I203 of the first prism 2, and the bonded surface is coated with a spectral film that reflects light of the first wavelength and transmits light of the second wavelength and the third wavelength. The second surface IV502 of the compensation prism 5 is bonded to the second surface III402 of the third prism 4, and the bonded surface is coated with a spectral film that reflects light of the second wavelength and transmits light of the third wavelength. The first surface IV501 of the compensation prism 5 is perpendicular to the optical axis of the light beam of the third wavelength.

[0022] The objective lens, the composite prism, and the eyepiece lens form one monocular telescope. Two monocular telescopes are arranged side by side, and the optical axes of the two telescopes are parallelized via the central axis connection to form a binocular telescope. In one telescope, the laser projection system is formed by the laser device, the composite prism, and the objective lens, and the laser projection system shares the composite prism and the objective lens with the telescope. In the other telescope, the objective lens, the composite prism, and the laser receiver form a laser reception system, and the laser reception system shares the objective lens and the composite prism with the monocular telescope. The projector is composed of a display 9-1, a first reflecting mirror 9-2, a second reflecting mirror 9-4, and a lens 9-3. The first reflecting mirror 9-2, the second reflecting mirror 9-4, and the lens 9-3 are arranged at the bottom of the composite prism of the right telescope, and the display 9-1 is arranged on the side of the composite prism of the right telescope.

[0023] The third wavelength light emitted from the projector's display 9-1 is reflected by the first reflecting mirror 9-2, passes through the lens 9-3, and is then reflected by the second reflecting mirror 9-4 to enter the compensation prism 5 of the right-side lens barrel, passes through the compensation prism 5 and the third surface III403 of the third prism 4 to enter the first prism 2, and then merges with the first wavelength light beam of the first prism 2, and finally forms an image on the display at the objective lens focal plane position of the right-side lens barrel (position indicated by F in Figure 1), and the image includes the reticle pattern of the laser ranging telescope and a pattern for displaying measurement information.

[0024] The light of the first wavelength from the object enters the telescope through the objective lens 6, enters the first surface I201 of the first prism 2, is reflected by the second surface I202 and the third surface I203 of the first prism 2, is further reflected by the first surface I201 and exits from the second surface I202, then enters the second prism 3, is sequentially reflected by the roof surface 302 and the first surface II301 of the second prism, and exits from the third surface II303, forming an image of the object at the focal plane position of the objective lens, and the image of the object in the right lens barrel is superimposed on the image on the display. The object can be observed and aimed by zooming in through the eyepiece.

[0025] The second wavelength light from the laser device enters the first surface III401 of the third prism 4, is reflected by the second surface III402 of the third prism 4, passes through the third surface III403, enters the first prism 2, is reflected by the second surface I202 of the first prism 2, exits from the first surface I201 of the prism, is collimated by the objective lens, and is then emitted toward the object targeted by the telescope.

[0026] The second wavelength light reflected by the target object is collected by the objective lens of another telescope, enters the first surface I202 of the first prism 2, is reflected by the second surface I202 of the first prism 2, passes through the third surface I203, enters the third prism 4, is reflected by the second surface III402 of the third prism, exits from the first surface III401 of the prism, and enters the laser receiver. The laser distance measuring telescope calculates the object distance from the process from emitting the laser light to the object to receiving the laser light, and displays related information on the display. Next, the projected image on the display is observed through the eyepiece to obtain related information. EXAMPLES

[0027] 3, the laser distance measuring telescope is provided with a reticle display mirror 10 between the eyepiece lens 1 of the right-hand tube and a compound prism. The reticle display mirror 10 is a transmissive LCD reticle display mirror or an OLCD reticle display mirror, and is attached to the focal plane of the objective lens.

[0028] The second surface IV502 of the compensation prism 5 in the composite prism is bonded to the third surface I203 of the first prism 2, and the bonded surface is coated with a spectral film that reflects light of the first wavelength and transmits light of the second and third wavelengths. The first surface IV501 of the compensation prism 5 is bonded to the third surface III403 of the third prism 4, and this bonded surface is perpendicular to the optical axis of the light beam of the second wavelength. The third prism 4 can be made of a different glass material than the compensation prism 5.

[0029] At this time, after replacing the display with the illumination light source 9-1, the projector is changed into an illumination device. The third wavelength light emitted from the illumination light source 9-1 is reflected by the first reflector 9-2, passes through the lens 9-3, and is then reflected by the second reflector 9-4 to enter the third prism 4 of the right lens barrel, and then passes through the compensation prism 5 to enter the first prism 2, and then merges with the first wavelength light beam of the first prism 2 to provide nighttime illumination for the LCD reticle display mirror.

[0030] The light of the first wavelength from the object enters the telescope through the objective lens 6, enters the first surface I201 of the first prism 2, is reflected by the second surface I202 and the third surface I203 of the first prism 2, is further reflected by the first surface I201 and exits from the second surface I202, then enters the second prism 3, is sequentially reflected by the roof surface 302 and the first surface II301 of the second prism, and exits from the third surface II303, forming an image of the object at the focal plane position of the objective lens. The image of the object in the right lens barrel is superimposed on the reticle display mirror. It is further zoomed in through the eyepiece to realize observation and aiming at the object.

[0031] The second wavelength light from the laser device enters the first surface III401 of the third prism 4, is reflected by the second surface III402 of the third prism 4, enters the compensation prism 5 via the third surface III403, passes through the compensation prism 5 and enters the first prism 2, is reflected by the second surface I202 of the first prism 2, exits from the first surface I201 of the prism, is collimated by the objective lens, and is then emitted towards the object targeted by the telescope.

[0032] The second wavelength light reflected by the target object is collected by an objective lens of another telescope, enters the first surface I202 of the first prism 2, is reflected by the second surface I202 of the first prism 2, passes through the third surface I203 and enters the compensation prism 5, passes further through the compensation prism 5 and enters the third prism 4, is reflected by the second surface III402 of the third prism, exits from the first surface III401 of the prism, and enters the laser receiver.

[0033] The laser distance measuring telescope calculates the distance to the object through the process of emitting a laser beam to the object and receiving the laser beam, and displays the measurement information on the reticle display mirror. The reticle display mirror is observed through the eyepiece to obtain related information. EXAMPLES

[0034] 4 shows the optical system of a monocular laser distance measuring telescope. The techniques applied to the binocular laser distance measuring telescope of the present invention are equally applicable to the monocular laser distance measuring telescope.

Claims

1. A composite prism based on an isosceles prism is provided with a first prism (2), a second prism (3), and a third prism (4), the first prism (2) is an isosceles prism, the second prism (3) is a roof prism, and the third prism (4) is a half pentaprism. A third surface III (403) of the third prism (4) is bonded to a third surface I (203) of the first prism (2), and a spectral film is coated on the bonded surface. Light of a first wavelength is incident on the first prism (2). a first prism (2) that is parallel to the prism (1), a second prism (2) that is parallel to the prism (1) and a third prism (2) that is parallel to the prism (1), a first prism (2) that is parallel to the prism (1), and a second prism (2) that is parallel to the prism (1).

2. a compensation prism (5), the second surface IV (502) of the compensation prism (5) being bonded to the second surface III (402) of the third prism (4), and the bonded surface being coated with a spectral film; The light of the second wavelength is incident on the first surface I (201) of the first prism (2), reflected by the second surface I (202) of the first prism (2), passes through the third surface I (203), and enters the third prism (4), is further reflected by the second surface III (402) of the third prism (4), and exits from the first surface III (401) of the third prism (4). A compound prism based on an isosceles prism according to claim 1 .

3. 3. The composite prism based on an isosceles prism as described in claim 2, characterized in that the light of the second wavelength enters the third prism (4) from the first surface III (401), is reflected by the second surface III (402) of the third prism (4), enters the first prism (2) via the third surface III (403), is reflected by the second surface I (202) of the first prism (2), and then exits from the first surface I (201) of the first prism (2).

4. A laser ranging telescope comprising a composite prism as described in claim 2 or 3, an eyepiece lens (1), an objective lens (6), a laser device (7), and a laser receiver (8), characterized in that the laser device (7) and the laser receiver (8) are arranged on an optical path where light of a second wavelength enters / exits the third prism (4).

5. 5. The laser ranging telescope of claim 4, further comprising a projector having a display (9-1), a first reflecting mirror (9-2), a lens (9-3), and a second reflecting mirror (9-4), wherein the third wavelength light emitted from the display (9-1) is reflected by the first reflecting mirror (9-2), passes through the lens (9-3), is then reflected by the second reflecting mirror (9-4), enters the compensation prism (5), passes through the compensation prism (5) and the third prism (4), enters the first prism (2), merges with the light beam of the first wavelength of the first prism (2), and is finally imaged at a position between the composite prism and the eyepiece lens (1).

6. A composite prism based on an isosceles prism, comprising a first prism (2), a second prism (3) and a third prism (4), further comprising a compensating prism (5), wherein the first prism (2) is an isosceles prism, the second prism (3) is a roof prism, the second surface IV (502) of the compensating prism (5) is bonded to the third surface I (203) of the first prism (2), the bonded surface being coated with a spectral film, the first surface IV (501) of the compensating prism (5) is bonded to the third surface III (403) of the third prism (4) (4), the bonded surface being perpendicular to the optical axis of the light beam of the second wavelength, The light of the first wavelength is incident on the first surface I (201) of the first prism (2), is reflected successively by the second surface I (202), the third surface I (203) and the first surface I (201) of the first prism (2), is emitted from the second surface I (202) of the first prism (2), is incident on the first surface II (301) of the second prism (3), is further reflected by the roof surface (302) and the first surface II (301) of the second prism (3), and is emitted from the third surface II (303); The light of the second wavelength is incident on the first surface I (201) of the first prism (2), reflected by the second surface I (202) of the first prism (2), passes through the third surface I (203) and enters the compensation prism (5), passes through the compensation prism (5) and enters the third prism (4) from the third surface III (403) of the third prism (4), is further reflected by the second surface III (402) of the third prism (4), and exits from the first surface III (401) of the third prism (4); Or / and the light of the second wavelength is incident on the first surface III (401) of the third prism (4), is reflected on the second surface III (402) of the third prism (4), is incident on the first prism (2) via the third surface III (403), is reflected on the second surface I (202) of the first prism (2), and is then emitted from the first surface I (201) of the first prism (2). A compound prism based on an isosceles prism, characterized in that

7. A laser ranging telescope comprising the composite prism described in claim 6, an objective lens (6), an eyepiece lens (1), a laser device (7), and a laser receiver (8), characterized in that the laser device (7) and the laser receiver (8) are arranged on an optical path where light of a second wavelength enters / exits the third prism (4).

8. A laser ranging telescope as described in claim 7, further comprising a reticle display mirror (10) arranged between the eyepiece lens (1) and the compound prism.

9. 9. The laser ranging telescope according to claim 8, characterized in that the reticle display mirror (10) is a transmissive LCD or OLED.

10. A projector comprising a display (9-1), a first reflector (9-2), a lens (9-3), and a second reflector (9-4), the first reflecting mirror (9-2), the second reflecting mirror (9-4) and the lens (9-3) are disposed at the bottom of a composite prism of the right lens barrel, and the display (9-1) is disposed on a side of the composite prism of the right lens barrel; After replacing the display (9-1) of the projector with an illumination light source, the projector is turned into an illumination device, and the light emitted from the illumination light source is reflected by the first reflector (9-2), passes through the lens (9-3), and then is reflected by the second reflector (9-4) to enter the third prism (4), passes through the compensation prism (5), and then enters the first prism (2), and then merges with the light beam of the first wavelength of the first prism (2), thereby providing night illumination for the LCD reticle display mirror. The laser distance measuring telescope of any one of claims 8 to 9.

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