JPS6329783A - Indication for position in heavenly bodies - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] By projecting a laser beam in the direction of the celestial body to be indicated, it is easy to explain to the observer the desired celestial body or the constellation made up of these celestial bodies. .

[Industrial application field]

This invention relates to a method for indicating the position of a celestial body in order to explain to an observer celestial bodies or constellations formed by these celestial bodies in the field.

[Conventional technology and its problems]

Traditionally, in order to point out a specific celestial object, the object was captured in the field of view of a telescope and then the other observers were shown the telescope. Not only was it not possible to do so, but it was also difficult to indicate the constellations determined by the positional relationships of multiple celestial bodies because the positional relationships with other celestial bodies could not be determined.

Another method has been to use a long tool such as a stick to give instructions, but because it is not long enough, the parallax for each observer is large (it cannot be used accurately for a large number of observers). Unable to give instructions.

Furthermore, attempts have been made to use a flashlight to point out celestial objects, but it is difficult to obtain a sharp beam with a flashlight and the distance it can reach is short, so in the case of a large number of observers, using the above-mentioned stick is preferable. Similarly, not only is the parallax large, but also light that is brighter than the starlight that should be indicated due to reflection or diffusion by the condensing lens enters the observer's eyes, causing him to lose sight of the celestial object that he is supposed to indicate.

[Means for solving problems]

The present invention indicates the position of a celestial body by directing and projecting a laser beam from a laser beam projection device toward the celestial body.

The laser beam projection device used to carry out the method of the present invention is a known laser beam projection device that uses a laser beam to display on a wall surface such as the outer wall of a building, or performs scanning with a laser beam to enhance a stage effect. Projection devices can be used.

Since such a laser beam projection device can change its projection direction at high speed, by projecting a laser beam toward multiple celestial bodies within the afterimage time of the eye, it is possible to project a laser beam toward multiple celestial bodies at virtually the same time. Can direct celestial bodies.

If such a laser beam projection device is used with a diurnal motion tracking device used in an astronomical telescope such as a latitude table or an equatorial mount, or a radio telescope, it is possible to continue giving instructions while automatically tracking celestial objects over a long period of time. .

[For production]

Since the laser beam is coherent light, it is well focused by the optical system, and therefore reaches a high position, allowing observers who are located relatively far from the laser beam projection device to find a position close to the celestial body. The position of the celestial body can be sufficiently indicated even by an observer who is located relatively far from the laser beam projection device.

Although the laser beam projected from the laser beam projection device to multiple celestial bodies is originally diffused in a conical shape with the laser beam projection device as the apex, the appearance of the laser beam as it moves away from the observer is The above convergence cancels out and is seen as a substantially parallel beam.

The laser beam is observed to disappear at a certain height due to absorption by the air and moving away from the observer, but this height disappears at virtually the same height when multiple celestial objects are pointed at. For example, if multiple stars, which form the framework of a constellation, are time-divided and directed with a laser beam, the line connecting their vanishing points will be visually recognized as having the same shape as the framework of the constellation, and the laser beam projection device will Constellations can also be indicated to observers located far away.

In addition, since the length of this laser beam to the vanishing point is approximately constant, if the laser beam is used to draw declination lines and right ascension lines on the sky, or to perform scanning, it will look like a planetarium or celestial globe. can be perceived as a spherical surface formed by the vanishing point of this laser beam, which can increase the interest of the -layer observer.

〔Example〕

FIG. 1 conceptually shows an example of a laser beam projection device used to carry out the method of the present invention, in which a laser light source R1 is used to deflect a laser beam from this laser light source, for example, in the horizontal and vertical directions. Galvanometer X
, Y, and a base body B on which these laser light sources and galvanometers are mounted, and the galvanometers X and Y are electrically controlled to direct the laser beam in a desired direction. Note that, although the above-mentioned horizontal direction and vertical direction are defined as horizontal and vertical for convenience of understanding, it is clear that these directions do not need to be horizontal and vertical, and it is sufficient that they are different directions from each other.

As this laser beam projection device, a known laser beam projection device that uses a laser beam to create a display on a wall surface such as the outer wall of a building, or performs scanning with a laser beam to enhance a stage effect, etc. can be used.

In the laser beam projection device as described above, since the galvanometer has high-speed response, it is possible to switch and indicate a plurality of celestial objects within the afterimage time by switching the voltage applied to the galvanometer at high speed.

FIG. 2 shows an embodiment of a deflection control device for supplying a deflection control voltage to the galvanometers X and Y in order to control the deflection direction of the laser beam by these galvanometers.

In FIG. 2, the horizontal deflection voltage generator 11 and the vertical deflection voltage generator 12 each have a ground terminal 0 and voltage output terminals 1 to 6, and as will be explained later with reference to FIG. are configured to be independently adjustable.

The rotation changeover switches 21 and 22 rotate in conjunction with each other under the control of the control processor 40, and sequentially switch and output the voltages of the voltage output terminals mentioned above, and the voltages of the rotary contacts 21' and 22' are sent via adders 31 and 32 to a galvanometer X for horizontal deflection and a galvanometer Y for vertical deflection (see FIG. 1), respectively.

Therefore, since the projection direction of the laser beam is determined by the voltage at the selected terminal of the horizontal deflection voltage generator 11 and the voltage at the selected terminal of the vertical deflection voltage generator 12, these voltages can be applied to the desired celestial body. By setting the laser beam to be projected in a certain direction, the celestial object can be indicated, and the rotary contacts of the rotary selector switches 21 and 22 that change these voltages can be set to project within the visual afterimage period (for example, 16 minutes). If the celestial body rotates once within 1 second), the observer will feel as if multiple celestial bodies are being directed at the same time.

The adders 31 and 32 add a voltage for tracking the laser beam to the diurnal motion of the celestial body, and the added voltage is calculated by the control processor 40 based on the time at that time. The digital output is A
The analog voltage is converted into an analog voltage by a /D converter 41.42 and then supplied to an adder 31.32, thereby being added to the voltage from the rotary selector switch 21.22.

In addition, in the embodiment shown in FIG. 2, for convenience of explanation, the rotation changeover switches 21 and 22 are shown as mechanically interlocked rotating switches, but from the viewpoint of switching speed, etc., electronic It is preferable to use a switch circuit, and the time sharing can be achieved by increasing the number of output voltages of the horizontal deflection voltage generator 11 and the vertical deflection voltage generator 12 and increasing the number of fixed contacts of the changeover switch. You can increase the number of celestial bodies displayed.

FIG. 3 shows a concrete example of a deflection voltage generator used as the horizontal deflection voltage generator 11 or the vertical deflection voltage generator 12 in FIG. 2 to generate a deflection voltage to be applied to the galvanometers X or Y. , two DC power supplies E1 and E2 shown as batteries are connected in series, and a resistor V with a tap is connected between both ends of the DC power supplies E1 and E2.
R1, VH2, VRs---VRn-1,
VRn are connected in parallel.

If the potential at the connection point of the above two power supplies El and E2 is O, the potential on the + side of the power supply E1 is 10, the potential on one side of the power supply E2 is -e, and the midpoint of each of the above resistors VR is The potential is 0. Therefore, when the position of the tap of the resistor VR is moved, the potential of this tap changes between +e and -e, so when this potential is sequentially switched by the scanner S, the galvanometer to which this voltage is supplied also sequentially changes direction. It will change.

Two sets of such deflection voltage generators are provided as a horizontal deflection voltage generator 21 and a vertical deflection voltage generator 22, as shown in FIG. Since the direction is determined, it is necessary to adjust the tap position of the resistor VR in the horizontal deflection voltage generator 21 and to adjust the tap position of the resistor VR in the vertical deflection voltage generator 22 in order to indicate one celestial body. It is obvious that the operability will be improved by arranging a plurality of such side sets on the operation panel at right angles to the direction in which they are lined up.

In addition, in the deflection control device shown in Figure 2, tracking of the diurnal motion of the celestial body is electrically controlled, but it is also possible to use a laser beam projection device to track the diurnal motion of the celestial body using an astronomical telescope or a radio telescope. If it is installed on a tracking mount, such as a latitude and latitude table or equatorial mount, it is possible to track celestial bodies mechanically.

〔Effect of the invention〕

According to the present invention, it is easy to observe celestial bodies in the field that cannot be clearly expressed verbally, and it is possible to indicate celestial bodies to a large number of observers at the same time, making it extremely suitable for cultivating schoolchildren's interest in astronomy. be.

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram of a laser beam projection device used in the present invention, Fig. 2 shows an embodiment of a deflection control device for deflecting a laser beam, and Fig. 3 shows an example of a deflection voltage generator. It is a diagram. L-ee'-Wheat Q negative 1 load! Fig.1
'J meter to φ Tsukuda system reward i Figure 2

Claims (3)

[Claims] (1) A method for indicating the position of a celestial body, characterized by projecting a laser beam directed in the direction of the celestial body to be indicated. (2) Laser beams directed in the direction of multiple celestial bodies can be directed at multiple celestial bodies by rapidly switching and projecting one laser beam in the direction of each celestial body in time. A method for indicating the position of a celestial body according to claim 1, characterized in that a celestial body is indicated. (3) A method for indicating the position of a celestial body according to claims 1 or 2, characterized in that a device for projecting a laser beam is installed on a mount that tracks the diurnal movement of the celestial body.