KR-102964030-B1 - HIGH ENERGY LASER EVADING ON-AXIS TELESCOPE AND LASER WEAPON INCLUDING THE SAME

KR102964030B1KR 102964030 B1KR102964030 B1KR 102964030B1KR-102964030-B1

Abstract

A high-energy laser avoidance coaxial telescope comprises a primary mirror having an opening formed in the center through which a plurality of laser beams pass; a secondary mirror facing the opening of the primary mirror and reflecting a plurality of laser beams incident through the opening of the primary mirror onto the reflective surface of the primary mirror; a slip ring forming an emission opening through which a plurality of laser beams reflected by the primary mirror are emitted externally and rotating about the central axis of the emission opening; and a secondary mirror support including one or more rods extending from the slip ring to the secondary mirror and supporting the secondary mirror, wherein the slip ring rotates at a rotation angle corresponding to the azimuth angle of the plurality of laser beams emitted through the emission opening.

Inventors

홍대기
서대교
김성우

Assignees

국방과학연구소

Dates

Publication Date: 20260511
Application Date: 20260313

Claims (16)

A main reflector with an opening formed in the center to allow multiple laser beams to pass through; A sub-reflector facing the opening of the main reflector and reflecting a plurality of laser beams incident through the opening of the main reflector onto the reflective surface of the main reflector; A slip ring that forms an emission opening through which a plurality of laser beams reflected by the main mirror are emitted to the outside, and rotates about the central axis of the emission opening; and A sub-reflector support comprising one or more rods extending from the slip ring to the sub-reflector and supporting the sub-reflector, and A high-energy laser avoidance coaxial telescope in which the slip ring rotates at a rotation angle corresponding to the azimuth angle of a plurality of laser beams emitted through the above-mentioned emission opening.
In Article 1, A high-energy laser avoidance coaxial telescope that avoids multiple laser beams emitted through the emission opening by rotating the slip ring so as not to be incident on the sub-reflector support.
In Article 1, A high-energy laser avoidance coaxial telescope in which, when the azimuth of a plurality of laser beams emitted through the above-mentioned emission aperture changes in a counterclockwise direction, the slip ring rotates in a counterclockwise direction with a rotation angle equal to the magnitude of the azimuth when the above-mentioned emission aperture is viewed from the front.
In Article 1, A high-energy laser avoidance coaxial telescope in which, when the azimuth angle of a plurality of laser beams emitted through the above-mentioned emission aperture changes clockwise, the slip ring rotates clockwise by an angle of rotation equal to the magnitude of the azimuth angle when the above-mentioned emission aperture is viewed from the front.
In Article 1, An optical position sensor that detects a low-power reference laser reflected from the above-mentioned sub-reflector and measures the concentricity error; and A high-energy laser avoidance coaxial telescope further comprising a hexapod mounted between the sub-mirror support and the sub-mirror to correct the concentricity error by adjusting the arrangement of the sub-mirror.
In Article 1, A motor that rotates the above slip ring in a clockwise or counterclockwise direction; and A high-energy laser-avoiding coaxial telescope further comprising a rotary encoder for measuring the amount of rotation of the slip ring.
In Article 1, The plurality of laser beams above are generated from a fixed-position laser oscillator and include three parallel laser beams whose optical paths do not overlap, and The above-described sub-reflector support comprises three rods extending to the sub-reflector in different extension directions of 120 degrees from the slip ring, for a high-energy laser avoidance coaxial telescope.
A laser oscillator that generates multiple parallel laser beams at a fixed position without overlapping optical paths; A laser focusing device that emits the above plurality of laser beams toward a target; and It includes a gimbal that rotates the laser focusing device at an azimuth and elevation angle so that it faces a target, and The above laser focusing device is, A main reflector with an opening formed in the center to allow multiple laser beams to pass through; A sub-reflector facing the opening of the main reflector and reflecting a plurality of laser beams incident through the opening of the main reflector onto the reflective surface of the main reflector; A slip ring that forms an emission opening through which a plurality of laser beams reflected by the main mirror are emitted to the outside, and rotates about the central axis of the emission opening; and A sub-reflector support comprising one or more rods extending from the slip ring to the sub-reflector and supporting the sub-reflector, and A laser weapon in which the slip ring rotates at a rotation angle corresponding to the azimuth rotation of the laser focusing device.
In Article 8, A laser weapon that prevents a plurality of laser beams emitted through the emission opening from being incident on the sub-reflector support by rotating the slip ring.
In Article 8, The above laser focusing device is, A laser weapon further comprising a coupe path including a plurality of connecting mirrors provided to induce a plurality of laser beams generated from the above laser oscillator into the opening of the main mirror.
In Article 10, The above coup route is, A first connecting mirror that reflects a plurality of laser beams incident from the above laser oscillator; A second connecting mirror that reflects a plurality of laser beams reflected by the first connecting mirror; and It includes a third connecting mirror positioned on an extension line connecting the openings of the sub-mirror and the main mirror, and which directs a plurality of laser beams reflected by the second connecting mirror to the sub-mirror through the opening of the main mirror. A laser weapon in which the first connecting mirror adjusts the reflection angle in response to the elevation rotation of the laser focusing device so that a plurality of laser beams are always reflected to the second connecting mirror.
In Article 8, A laser weapon in which, when the above gimbal rotates the above laser focusing device in a counterclockwise azimuth, the slip ring rotates in a counterclockwise direction at a rotation angle equal to the magnitude of the azimuth when the above emission opening is viewed from the front.
In Article 8, A laser weapon in which, when the above gimbal rotates the above laser focusing device in a clockwise azimuth, the slip ring rotates clockwise at a rotation angle equal to the magnitude of the azimuth when the above emission opening is viewed from the front.
In Article 8, The above laser focusing device is, An optical position sensor that detects a low-power reference laser reflected from the above-mentioned sub-reflector and measures the concentricity error; and A laser weapon further comprising a hexapod mounted between the sub-reflector support and the sub-reflector to correct the concentricity error by adjusting the arrangement of the sub-reflector.
In Article 8, The above laser focusing device is, A motor that rotates the above slip ring in a clockwise or counterclockwise direction; and A laser weapon further comprising a rotary encoder for measuring the amount of rotation of the slip ring.
In Article 8, The above laser oscillator generates three parallel laser beams with non-overlapping optical paths, and The above-described sub-reflector support is a laser weapon comprising three rods extending to the sub-reflector in different extension directions of 120 degrees from the slip ring.

Description

High-energy laser evading on-axis telescope and laser weapon including the same The present invention relates to a high-energy laser avoidance coaxial telescope and a laser weapon including the same, and more specifically, to a high-energy laser avoidance coaxial telescope driven so that a laser does not enter a sub-reflector support when a high-energy laser is fired, and a laser weapon including the same. A coaxial telescope is a telescope in which the secondary mirror and the primary mirror lie on the same optical axis, and the support for the secondary mirror must be present in the telescope tube. In laser weapon systems, the telescope is mounted on a gimbal, and when tracking or aiming at a target, the gimbal must be driven in the azimuth and elevation directions; during this process, the laser beam rotates along with it. Since the rotated laser beam can strike the support for the secondary mirror of a coaxial telescope, it is necessary to have a structure that can avoid this or to reduce the amount of energy incident on the support. Conventional coaxial telescopes for laser weapons utilize knife-edge mirrors to reduce the energy incident on the sub-mirror support. However, this method can cause adverse effects, such as thermal expansion, as the transmitted laser beam is incident on the sub-mirror support depending on the reflectivity and transmittance of the knife-edge mirror; furthermore, the reflected beam can heat the interior of the telescope tube, potentially causing problems. Additionally, in off-axis telescopes, which lack a sub-mirror support, off-axis aberrations occur during the focusing operation, making it difficult to achieve full optical performance against targets of varying distances. FIG. 1 is a side block diagram showing a high-energy laser avoidance coaxial telescope and a laser weapon including the same according to one embodiment of the present invention. FIG. 2 is a front block diagram showing a high-energy laser avoidance coaxial telescope and a laser weapon including the same according to one embodiment of the present invention. FIG. 3 is an isometric projection showing a high-energy laser avoidance coaxial telescope and a laser weapon including the same according to one embodiment of the present invention. FIG. 4 is an exemplary diagram illustrating the relationship between a plurality of laser beams incident on the input aperture of a laser weapon according to one embodiment of the present invention and a plurality of laser beams emitted through the output aperture of a coaxial telescope. FIG. 5 is an example diagram showing the shape of multiple laser beams incident on the input aperture and multiple laser beams emitted from the output aperture of the coaxial telescope according to the rotation of the slip ring when the gimbal laser focusing device in FIG. 4 is rotated 60 degrees counterclockwise. FIG. 6 is an example diagram showing the shape of multiple laser beams incident on the input aperture and multiple laser beams emitted from the output aperture of the coaxial telescope according to the rotation of the slip ring when the gimbal laser focusing device in FIG. 4 is rotated 60 degrees clockwise. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Hereinafter, a high-energy laser avoidance coaxial telescope according to one embodiment of the present invention and a laser weapon including the same will be described with reference to FIGS. 1 to 3. FIG. 1 is a side block diagram showing a high-energy laser evasion coaxial telescope and a laser weapon including the same according to an embodiment of the present invention. FIG. 2 is a front block diagram showing a high-energy laser evasion coaxial telescope and a laser weapon including the same according to an embodiment of the present invention. FIG. 3 is an isometric projection showing a high-energy laser evasion coaxial telescope and a laser weapon including the same according to an embodiment of the present invention. Referring to FIGS. 1 to 3, a laser weapon may include a laser focusing device (100) that emits a laser beam toward a target, a gimbal (200) that rotates the laser focusing device (100) at an azimuth and elevation angle so that the laser focusing device (100) faces the target, and a laser oscillator (300) that generates a