JP5757081B2 - Circumflex reflector telescope - Google Patents

Description

  The present invention relates to an abutment table type reflecting telescope, and more particularly to an abutment table type reflecting telescope having an altitude axis drive portion and a lens barrel portion that do not have a center piece as a rotation axis.

  As shown in FIG. 2 (b), the conventional reflecting telescope includes a base 1 installed on a well-known turntable azimuth rotating unit 20 that can rotate about a vertical axis, and is supported on the base. A center piece 13 rotatable around a horizontal axis, a lens barrel truss 4b and a main mirror cell 14 provided below the center piece 13, a main mirror 8 supported by the main mirror cell 14, and a center piece The structure includes a barrel truss 4a and a top ring 5 provided above and a secondary mirror 9 supported by a spider (not shown) provided on the top ring 5, and is configured to observe using an observation device (not shown). It was. (For example, see the prior art described in JP-A-2-15227.)

Japanese Patent Laid-Open No. 2-15227

  However, conventional reflecting telescopes have long parts that connect the barrel and the altitude axis, which are called centerpieces, etc., and it is necessary to install a solid base that is strong enough to hold a strong and long centerpiece. Therefore, it was difficult to reduce the weight.

  Further, in the conventional reflecting telescope, since the primary mirror is supported by the lens barrel truss and the primary mirror cell provided below the center piece, a bending moment acts on the primary mirror and the primary mirror cell. It was difficult to enlarge and improve performance.

  Furthermore, the conventional reflecting telescope operates the altitude axis by rotating a small-diameter disk fixed around the horizontal axis end of the centerpiece with a driving element. It was difficult to control the altitude angle.

(1) The altitude axis drive part described in claim 1 is a rail pedestal having an arcuate part having a radius R around the virtual rotation axis of the lens barrel part, and is perpendicular to the virtual rotation axis , Two rail pedestals arranged on the azimuth axis rotating disk and positioned parallel to each other, and an arcuate arc rail having a radius R centered on the virtual axis of rotation of the lens barrel portion, Two arc rails that are arranged perpendicularly to each other and parallel to each other, and a drive motor attached to each rail pedestal. A drive motor is arranged to rotate around,
(2) The lens barrel portion includes a primary mirror truss including a plurality of frame shafts extending from the arc rail toward the primary mirror, a primary mirror supported above the arc rail by the primary mirror truss, and the primary and secondary mirrors. A lens barrel truss that maintains the position of the lens, a secondary mirror supported above the primary mirror by the lens barrel truss,
Have
This is solved by a graticule type reflecting telescope having an altitude axis driving portion and a lens barrel portion, which does not have a center piece as a rotating shaft.

  Furthermore, the above-mentioned problem is characterized in that the tape encoder according to claim 2 is attached along the arc arc of the arc rail, the sensor is attached to the rail pedestal, and the position angle of the altitude axis is measured. This is solved by the graduation reflector according to item 1.

  By the invention according to claim 1 of the present application, it is possible to eliminate a long part called a centerpiece or the like existing in a conventional reflecting telescope and an altitude axis and to carry a strong and long centerpiece. Since there is no need to do so, the base can be reduced in size, so that the structure of the reflecting telescope can be significantly reduced in weight compared to the conventional reflecting telescope.

  Furthermore, according to the invention according to claim 1 of the present application, the primary mirror truss and the primary mirror can be evenly supported by the arc rail from directly below, so that a bending moment does not act on the primary mirror truss and the primary mirror, and a lightweight and rigid structure is obtained. Realized and has the advantage that it is easy to further enlarge the telescope and improve its performance.

  Further, according to the first aspect of the present invention, since the large arc rail surrounding the main mirror is directly moved by the drive motor, there is an advantage that a transmission mechanism having a large reduction ratio and a structure in which no torsion torque is generated in the lens barrel can be obtained. .

  Further, according to the invention according to claim 2 of the present application, since the encoder is attached to the arcuate arc of a large arc, high resolution is easily obtained, and furthermore, the encoder is attached to the same arcrail as the part driven by the drive motor, so that the motor drive There is an advantage that a mechanism that is less likely to cause a difference between the amount and the detection amount of the encoder and is easy to control can be obtained.

1 is a schematic diagram of an embodiment of a graticule reflecting telescope of the present invention. FIG. It is a schematic comparison figure of the graticule type reflective telescope (a) of this invention, and the conventional graticule type reflective telescope (b).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a diagram showing an altitude axis drive portion and a lens barrel portion of the graticule type reflecting telescope of the present invention.

  First, the altitude axis drive part will be described. A part indicated by reference numeral 1 is a rail pedestal, and is a part generally called a base. The rail pedestal 1 supports two arc rails 2 and is installed on an azimuth rotary table (not shown). The arc rail 2 performs a rotational motion with a virtual axis passing through the arc centers of the two arc rails as a rotation axis. This driving force is realized by the driving motor 10. As the drive motor, various well-known devices such as a drive motor to which a driving force is transmitted by friction drive and modifications thereof can be used.

  Next, the lens barrel portion will be described. A component indicated by reference numeral 3 is a primary mirror truss, which is manufactured by a truss structure. The main mirror truss 3 is connected to the arc rail 2, supports the main mirror 8, and includes a frame shaft that extends from the arc rail 2 toward the main mirror 8 in the radial direction. The primary mirror truss 3 can be further configured to support a third mirror. A part indicated by reference numeral 4 is a lens barrel truss, and is manufactured by a truss structure. The lens barrel truss 4 is connected to the main mirror truss 3 or the arc rail 2 and supports the top ring 5. Further, the lens barrel truss 4 supports the secondary mirror 9 via the top ring 5, the spider 6 and the hub 7. However, the configuration for supporting the secondary mirror 9 is not limited to this, and the upper portion of the barrel truss 4 may be directly connected to the hub 7.

  The tape encoder that detects the position angle of the altitude axis is attached to the encoder attachment surface 11 on the arc rail 2. Then, the position angle of the altitude axis is measured by a sensor (not shown) such as a reading head attached to a place other than the lens barrel portion such as the rail base 1.

  Furthermore, when the earthquake is predicted or when the earthquake occurs, a gripping and fixing device (not shown) that grips the arc rail 2 automatically or manually can be installed on the rail base 1. As the holding and fixing device, various well-known devices such as a device that holds the arc rail 2 from the side and presses and fixes the arc rail 2 to the rail base 1 and modifications thereof can be used.

  The method of using the graticule type reflecting telescope of the present invention is the same as that of the conventional reflecting telescope. The third mirror is not used and the Cassegrain type is used, and the observation device is installed on the eyepiece below the main mirror. Alternatively, the third mirror may be used as a Nasmyth type, and the observation device may be installed at the eyepiece in the direction perpendicular to the barrel, and the third mirror may be installed as a movable type. It is also possible to switch to both Nasmyth methods and use various well-known methods and variations thereof. In addition, the observation apparatus can use various well-known apparatuses for the purpose of imaging and spectroscopy and variations thereof.

  As described above, the main feature of the present invention is that, as schematically shown in FIG. 2 (a), the primary mirror is supported by the primary mirror truss, and a lens barrel called a center piece or the like. The long parts that connect the altitude axis can be eliminated, and there is no need to carry a strong and long centerpiece, so the foundation can be downsized. Compared to the conventional reflecting telescope shown in FIG. 2 (b), the structure can be significantly reduced in weight.

  Accordingly, the present invention is not limited to the embodiments illustrated by way of example and illustrated in the accompanying drawings, and can be embodied in various forms without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Rail base, base 2 Arc rail 3 Primary mirror truss 4 Lens barrel truss 4a Lens barrel truss 4b Lens truss 5 Top ring 6 Spider 7 Hub 8 Primary mirror 9 Secondary mirror 10 Drive motor 11 Encoder mounting surface 12 Third mirror 13 Center Piece 14 Primary mirror cell 20 Turntable direction rotating part

Claims (3)

(1) The altitude axis drive part
A rail pedestal having an arcuate portion with a radius R centered on the virtual rotation axis of the lens barrel portion, and arranged on an azimuth rotary disk perpendicular to the virtual rotation axis and positioned parallel to each other Rail pedestal,
An arc-shaped arc rail having a radius R around the virtual rotation axis of the lens barrel portion, the arc rails being arranged perpendicular to the virtual rotation axis and positioned parallel to each other;
A drive motor attached to each rail pedestal;
Have
Is guided by the circular arc portion of the rail pedestal Ri formed by disposing a drive motor so that the arc rail rotational movement about the imaginary rotation axis,
(2) The lens barrel is
A primary mirror truss including a plurality of frame shafts extending from the arc rail toward the primary mirror;
A primary mirror supported above the arc rail by the primary mirror truss;
A lens barrel truss that maintains the position of the primary and secondary mirrors;
A secondary mirror supported above the primary mirror by the lens barrel truss;
Have
Does not have a centerpiece that is a rotating shaft,
A graticule type reflecting telescope having an azimuth axis rotating disk, an altitude axis drive part and a lens barrel part.   2. The graticule-type reflecting telescope according to claim 1, wherein the tape encoder is attached along the arc arc of the arc rail, the sensor is attached to the rail pedestal, and the position angle of the altitude axis is measured. 3. A grip fixing device for automatically or manually gripping an arc rail when an earthquake is predicted or when an earthquake occurs is installed on the rail base. No Ichidai Reflective Telescope.

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