An anastigmat Korsch telescope with three aspherical mirrors includes a bearing structure having a first face to which the first mirror is attached, a hollow structure of a shape elongated in a direction substantially perpendicular to the plane of the central aperture, limited by walls attached to t
An anastigmat Korsch telescope with three aspherical mirrors includes a bearing structure having a first face to which the first mirror is attached, a hollow structure of a shape elongated in a direction substantially perpendicular to the plane of the central aperture, limited by walls attached to the inside of which are the second mirror in a portion of the hollow structure located in front of the first mirror, and at least one other mirror selected from the third mirror and the at least one deflecting mirror, the walls having at least one first aperture so as to allow a light beam to pass through coming from the object originating from the first mirror and heading toward the second mirror, the bearing structure further comprising means of attachment of the hollow structure to the bearing structure, at least one structure selected from the hollow structure and the bearing structure having a portion traversing the central aperture.
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1. An anastigmat Korsch telescope with three aspherical mirrors comprising at least one first concave mirror having a central aperture, a second convex mirror arranged in front of the first mirror, a third concave mirror, at least one first deflecting mirror and a detector, the mirrors being arrange
1. An anastigmat Korsch telescope with three aspherical mirrors comprising at least one first concave mirror having a central aperture, a second convex mirror arranged in front of the first mirror, a third concave mirror, at least one first deflecting mirror and a detector, the mirrors being arranged so that the first mirror and the second mirror form an intermediate image of an object at infinity, the image being located between the second mirror and the third mirror, the third mirror forming a final image of this intermediate image in the focal plane of the telescope wherein the detector is placed, the telescope further comprising:a bearing structure having a first face to which the first mirror is attached,a hollow structure of a shape elongated in a direction substantially perpendicular to the plane of the central aperture, limited by walls, attached to the inside of which are the second mirror in a portion of the hollow structure located in front of the first mirror, and at least one other mirror selected from the third mirror and the at least one deflecting mirror, said walls having at least one first aperture so as to allow a light beam to pass through coming from the object originating from the first mirror and heading toward the second mirror, said bearing structure further comprising means of attachment of the hollow structure to said bearing structure,at least one structure selected from the hollow structure and the bearing structure having a portion traversing said central aperture. 2. The telescope as claimed in claim 1, wherein the bearing structure has a hollow front portion traversing the central aperture and surrounding a portion of the hollow structure, said means of attachment being arranged at the level of said front portion of the bearing structure. 3. The telescope as claimed in claim 1, wherein the bearing structure is in one piece. 4. The telescope as claimed in claim 1, further comprising a rear frame and wherein the bearing structure is attached to said rear frame. 5. The telescope as claimed in claim 1, wherein the walls of the hollow structure comprise at least one second aperture so as to allow a light beam to pass through coming from a mirror attached to the inside of the hollow structure and heading toward the next mirror of the optical combination arranged outside the hollow structure. 6. The telescope as claimed in claim 1, wherein the means of attachment consist of adhesive injected via injection holes made in the front portion of the bearing structure. 7. The telescope as claimed in claim 2, wherein the elongated hollow structure also traverses the central aperture, thus having one portion located at the rear of the first mirror. 8. The telescope as claimed in claim 7, further comprising a support structure attached to the portion of the hollow structure located at the rear of the first mirror, and to which are attached one or more elements of the telescope where applicable. 9. The telescope as claimed in claim 7, wherein the at least one other mirror attached to the inside of the hollow structure is the first deflecting mirror, arranged in the portion of the hollow structure located at the rear of the first mirror. 10. The telescope as claimed in claim 1, wherein the at least one other mirror attached to the inside of the hollow structure is the third mirror. 11. The telescope as claimed in claim 10, wherein the third mirror is substantially arranged in the plane of the central aperture of the first mirror. 12. The telescope as claimed in claim 11, wherein a first distance is defined as the distance between the first and the second mirror and a second distance as the distance between the second mirror and the third mirror and wherein said second distance is between 90% and 150% of said first distance. 13. The telescope as claimed in one of claim 11, wherein the first deflecting mirror is also attached to the inside of the hollow structure in the portion of the hollow structure located in front of the first mirror. 14. The telescope as claimed in claim 1, wherein the at least one other mirror attached to the inside of the hollow structure is the first deflecting mirror and wherein the third mirror is substantially arranged in the plane of the central aperture of the first mirror and is attached to the bearing structure. 15. The telescope as claimed in claim 14, wherein the bearing structure has a rear hollow portion to the outside of which the detector is attached. 16. The telescope as claimed in claim 1, wherein a deflecting mirror is substantially arranged in an exit pupil of the telescope and is active. 17. The telescope as claimed in claim 1, wherein a deflecting mirror is substantially arranged in an exit pupil of the telescope, is aspherical and adapted to a first focal length of the telescope, and is retractable so as to be replaced by at least one other deflecting mirror adapted respectively to another focal length, different from the first focal length. 18. A method of manufacturing an anastigmat Korsch telescope with three aspherical mirrors comprising at least one first concave mirror having a central aperture, a second convex mirror, a third concave mirror, at least one first deflecting mirror and a detector, the mirrors being arranged so that the first mirror and the second mirror form an intermediate image of an object at infinity, the image being located between the second mirror and the third mirror, the third mirror forming a final image of this intermediate image in the focal plane of the telescope wherein the detector is placed, the method comprising the steps of: providing a bearing structure having a first face to which the first mirror is attached and having a hollow front portion traversing the central aperture of the first mirror,providing a hollow structure of elongated shape and limited by walls, attached to the inside of which are the second mirror and at least one other mirror selected from the third mirror and the at least one deflecting mirror, said walls of the hollow structure having at least one first aperture,inserting the hollow structure into the front hollow portion of the bearing structure,positioning said hollow structure with respect to the bearing structure in a direction substantially perpendicular to the plane of the central aperture with a position adjustment device, so that the second mirror is positioned in front of the first mirror at a determined position with respect to the first mirror, the first aperture being configured so as to allow a light beam to pass through coming from the object, originating from the first mirror and heading toward the second mirror,attaching the hollow structure to the bearing structure by means of attachment implemented from the front portion of the bearing structure,withdrawing the position adjustment device. 19. The method as claimed in claim 18, wherein the positioning step consists in sliding then temporarily attaching to the inside of the hollow structure an intermediary tool connected to an adjustment device outside the structure allowing an adjustment with 6 degrees of freedom, then adjusting said position. 20. The method as claimed in claim 18, wherein the attachment step consists in injecting an adhesive via injection holes arranged in the front portion of the bearing structure.
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