JP2019144379A - Planetarium performance method - Google Patents

Abstract

To provide a star projection cylinder that can display a location of a constellation or asterism, or a specific celestial body and the like in an easily understandable manner in learning projection and the like.SOLUTION: In an optical planetarium obtaining whole-sky star images by projecting a projection image of respective division surfaces having a whole sky divided due to individual star projection cylinders with a projection original plate and a light source, the star projection cylinder is configured to: divide the star original plate A having a pattern of the star to be projected drawn and in the respective star projection cylinders into a plurality of projection areas; illuminate respective areas by a plurality of individually light-adjustable light sources B1 to B4; and relatively change an amount of light of a specific area with respect to an amount of light of other area to thereby project the specific area so as to be highlighted to an audience.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing an optical planetarium.

  In an optical planetarium, when projecting a star of the whole sky, the whole sky is divided into a plurality of surfaces, and a projection master plate on which a star pattern to be projected is drawn, and a plurality of light sources that illuminate the projection master plate Each division plane is projected by a star projection cylinder. That is, a star (starry sky) in the whole sky is projected by a plurality of star projection tubes (Patent Document 1).

  Until now, the stellar projection tubes used a single light source to illuminate the stellar original and projected the starry sky. For bright stars with insufficient illuminance, it is a common practice to compensate for insufficient brightness with a projection tube with a separate light source, and projecting the starry sky by guiding the light from the separate light source to the stellar original plate with an optical fiber ( Patent Document 2) has also been proposed.

  Similarly, with respect to a method of guiding a light beam to a stellar original plate using an optical fiber, in Patent Document 3, light beams from one or more light sources are directly guided to the original plate for all stars and constellation pictures by an optical fiber or a fiber optic bundle. How to do is shown.

  However, in any case, the star base plate is a single illumination target, and the purpose is to project the entire starry sky projected by multiple star base plates with the correct brightness. I just stayed.

Japanese Patent Laid-Open No. 9-218641 JP 2007-322843 A Japanese Patent Laid-Open No. 62-191818 JP-A-6-289976

  On the other hand, when projecting the starry sky in learning projections, etc., many stars are always projected, so the location of the constellation and the characteristic star arrangement called asterism or the position of a specific celestial body are determined by surrounding stars It was difficult to understand.

  For this reason, constellations and asterisms were taught by moving the arrows in the starry sky and tracing each star with a hand-held projector (pointer) that projected the arrow pattern to point to them. (Patent Document 4).

  However, in the above method, the consciousness concentrates on chasing the arrow pattern, and it is difficult to grasp the positional relationship of the target celestial body in the starry sky. Also, because the projected arrow always shines by the stars that follow, the original brightness of the stars is not known, and it is not possible to grasp how it originally looks in the starry sky. There was a problem that it was not possible to create a sufficient situation for grasping or understanding.

  The invention of the present application was created in view of the above-mentioned problems of the prior art, and a planetarium rendering method capable of easily displaying the position of a constellation, an asterism, or a specific celestial body in learning projection etc. The purpose is to provide.

  That is, the planetarium rendering method of the present invention is an optical planetarium that obtains a star image of the whole sky by projecting projected images of the divided surfaces obtained by dividing the whole sky with individual star projection cylinders having a projection original plate and a light source. , Divide the star base plate in each star projection tube on which the star pattern to be projected is divided into a plurality of projection areas, and illuminate each area with a plurality of individually dimmable light sources. The specific area is projected so as to be conspicuous by changing the light quantity of the specific area relative to the light quantity of other areas.

  The invention described in claim 2 is characterized in that, in the planetarium rendering method, the amount of light in a specific area in the stellar original plate is blinked at regular intervals.

  Further, in the above-described planetarium rendering method, the invention according to claim 3 is apparently moved by sequentially changing a specific region in which the light amount is changed relative to the light amount of other regions. It is characterized by giving an impression to the audience.

  According to a fourth aspect of the present invention, in the planetarium rendering method, a projection area is formed by dividing an area where an arbitrary constellation is projected.

  The invention described in claim 5 is characterized in that, in the planetarium rendering method, a region where an arbitrary asterism is projected is divided into projection regions.

  The invention described in claim 6 is characterized in that, in the planetarium rendering method, a region where an arbitrary constellation and asterism are projected is divided.

  The invention described in claim 7 is characterized in that, in the planetarium rendering method, a projection area is obtained by dividing an area where a single nebula cluster or a star is projected.

  According to the planetarium rendering method of the present invention having the above-described configuration, the starry sky of the region that is desired to be noticed is blinked, or conversely, the starry sky of the region that is not desired to be noticed is darkened. It becomes possible to show the arrangement in an easy-to-understand manner.

  In the above case, it is not necessary to point the star using an arrow pattern, etc., so it is possible to grasp the brightness of individual stars, the arrangement and brightness of nearby stars, so the area you want to focus on is the entire starry sky Since it is possible to simultaneously recognize where it is inside and what kind of stars there are around it, it is possible to create a situation that can be understood more deeply than before.

  Also, as an effect other than showing constellations etc., for example, in projection for the purpose of learning science, constellations in a specific direction to show how the stars in each direction move due to diurnal motion If you show only bright and dark others, you can pay attention to the movement of stars in a specific direction, so you can use special devices to see how the stars move in that direction, It can be understood without projecting images explaining the movement of stars in that direction.

  Also, the fact that the constellations that can be seen differ depending on the season can be shown in an easy-to-understand manner by the same method.

  Furthermore, if the specific bright areas as described above are sequentially moved, the audience's line of sight can be naturally guided in the target direction. In other words, it shows the target constellation and asterism while guiding the sight of the audience, and also projects other than the target stars, variable stars, or nebulae in the constellation darkly or blinks the target. If the position is indicated by, it is possible to easily understand the position of the object in the visible starry sky, or how it can be seen including brightness.

The front view of the planetarium star projection cylinder used for the planetarium presentation method of this invention. Same as above, left sectional view. The block diagram of an electric circuit same as the above. A conceptual diagram of the starry sky projected by a planetarium of the prior art. A conceptual diagram of the starry sky projected by a planetarium of the prior art. The conceptual diagram of the starry sky projected with the planetarium production method of this invention. The conceptual diagram of the starry sky projected with the planetarium production method of this invention. The conceptual diagram of the starry sky projected with the planetarium production method of this invention. The conceptual diagram of the starry sky projected with the planetarium production method of this invention. The conceptual diagram of the starry sky projected with the planetarium production method of this invention.

  FIG. 4 shows a starry sky projected by a conventional planetarium. Usually, in order to explain the constellation, a constellation line is projected as shown in FIG. 5 to explain the constellation. However, it is difficult to trace the position and shape of the constellation while buried in many stars.

  However, according to the present invention, for example, as shown in FIG. 6, a star other than a bright star that serves as a landmark of the constellation is displayed darkly to show a remarkable star. Then, as shown in FIGS. By projecting the area sequentially with normal brightness, the position and shape of the constellation can be shown. Of course, as shown in FIG. 10, if necessary, those constellation regions may be projected with normal brightness, and individual constellation lines may be projected to explicitly indicate individual constellations.

  Furthermore, as already described, by repeating the projection state in which the individual constellation areas shown in FIGS. 7 to 9 are emphasized and the normal projection state shown in FIG. 4 alternately, only the position of the constellation on the sky is obtained. It is easy to see the positional relationship with other constellations or the brightness relationship with nearby stars.

  In addition, the bright star as a landmark shown in FIG. 6 shows an asterism called “summer triangle”, and as is clear from FIG. 4, the star to be connected can be clearly shown. . Therefore, the “summer big triangle” can be clearly shown by alternately repeating the states of FIGS. 4 and 6. As can be seen from this, it can be seen that the present invention is also excellent in indicating the position and shape of the asterism.

  Next, a specific example of a planetarium star projection cylinder used in the planetarium rendering method of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of the planetarium star projection cylinder, conceptually illustrating the internal mechanism. In the figure, symbol A is a projection master plate on which a star pattern to be projected is drawn, and is divided into three divided regions 1 to 3 here. Reference numerals J1 and J2 in the figure are virtual lines indicating boundaries between adjacent divided regions. Reference numerals H1 to H4 in the figure are the positions of stars or nebulae in each of the divided areas 1 to 3, and are conceptually shown in a star shape so as to be easily distinguished.

  Reference numerals B1 to B4 in the figure denote light sources that illuminate individual divided areas. Here, the divided areas 1 are illuminated by two light sources B1 and B2, the same 2 is a light source B3, and the same 3 is a light source B4. . The light source is virtually illustrated in FIG. 1 and is actually disposed on the light source base plate located behind the stellar original plate A.

  FIG. 2 is a left sectional view of a planetarium star projection cylinder used in the planetarium rendering method of the present invention. Reference numeral G in the drawing denotes a light source base plate, which is provided with light sources B1 and B2 for illuminating the divided area 1 of the projection original plate A, light source B3 for illuminating 2 and light source B4 for illuminating 3 as well. .

  The luminous flux from each of the light sources reaches each divided area of the projection original plate A through the light guiding lens D. Here, in each corresponding projection area of the star original plate illuminated by the light from each light source. Optical partitioning means are provided in the stellar projection tube along the boundary between the projection areas so that the illumination light fluxes of the adjacent projection areas do not enter. Here, a partition plate E having the same curve as the dividing line J2 is provided at the boundary between the projection areas 2 and 3 as the partitioning means.

  In addition, a partition block F having one side of the outer peripheral shape having the same curve as the dividing line J1 is provided at the boundary between 2 and 3 with respect to the projection area 1. The partition block F is made of a transparent solid material through which the light beam from the light source B1 is transmitted, and has an end surface (indicated by a thick line in the drawing) as an opaque or reflective surface. Since this partition block F is a transparent solid, it may be formed integrally with a light guiding lens D. Further, the partition block F can be clearly separated from the stellar original plate A by being in close contact with the stellar original plate A. However, if necessary, the partition block F is separated from the stellar original plate A by, for example, a space near the dividing lines J1 and J2. A blurring effect may be given to the divided areas by allowing both light beams to enter.

  Here, the light beam from the light source B2 is directly guided to the star or nebula star cluster H2 on the star original plate A by the optical fiber C, so that a specific star or nebula star cluster is set as a divided region. In this case, the optical fiber C needs to be accurately arranged at a specific position on the stellar original plate A. Here, a hole is made in the partition block F and the lens D, and the optical fiber C is passed through the hole to hold the optical fiber C. An example to do. The optical fiber C may be bonded to the separator block F, the lens D, or the stellar original plate A as necessary.

  FIG. 3 is a block diagram of an electric circuit of a planetarium star projection cylinder used in the planetarium rendering method of the present invention, and is a diagram showing a control method of the light sources B1 to B4 on the light source base plate G. The light sources B1 to B4 are connected to different light control devices L1 to L4, respectively, and the light control device is connected to a star projection tube control device K that controls the light control device of the star projection tube. The star projection cylinder control device K operates in response to a command from a higher level control device of the planetarium.

  In general operation, the light source B1 to B4 always has the same instruction value sent from the star projection tube control device K to the light control devices L1 to L4, and performs the same function as the conventional star projection tube.

  Next, a specific example of a method for controlling the light sources B1 to B4 for obtaining the function and effect intended by the present invention will be described below.

(1) When attention is paid to the divided region 2 including the light source B3 on the light source base G, a command to set the brightness to 50% from the star projection cylinder control device K to the light control device L3 and the brightness to 100% If the command is given alternately with a certain interval, the target can be blinked. A command to set the brightness to 100% is issued to the dimmer L3, the light source B3 is caused to emit light at 100% brightness, and the brightness is 10% to the dimmers L1, 2, 4 and other star projection tubes. The light source B1, 2, 4 and the light source of the other star projection cylinders emit light with a brightness of 10%, so that attention can be directed to the divided area including the light source B3.

(2) The divided area including the light source B2 in the divided area 1 shown as a star or a nebula cluster in FIG. 1 is surrounded by the light source B1 and is a hierarchical divided area included in the divided area 1. First, as in the case shown in (1), in order to pay attention to the divided area including the light source B1, a command value of 100% brightness is output from the star tube controller K to the dimmers L1 and L2, and darkened. The divided region including the light sources B3 and B4 to be expressed outputs a command value to the dimmers L3 and L4 so as to have a brightness of 10 ‰. For other star projection tubes, command values are issued so that all the light sources have a brightness of 10%.

  Further, in order to indicate the position of a star or nebula cluster in a divided region of the light source B2 surrounded by the region including the light source B1, if a command value that blinks at a constant interval is repeatedly given to the light control device L2, the light source B1 It is possible to clearly indicate the position of the star or nebula cluster H2 in the divided region including. If necessary, return the light source of all star projection tubes to 100% brightness, not only the position in the sky, but also the positional relationship with other constellations, or the brightness with other stars. You can easily see the relationship.

A Stellar original plate 1 Divided area 2 Divided area 3 Divided area B1 Light source B2 Light source B3 Light source B4 Light source C Optical fiber D Lens E Partition plate F Partition block
J 1 dividing line
J 2 Dividing line H1 Position of a star or nebula star cluster in each divided area H2 Position of a star or nebula star cluster in each divided area H3 Position of a star or nebula star cluster in each divided area H4 Star or nebula star cluster in each divided area Position H1 Position of a star or nebula cluster in each divided region L1 Light control device L2 Light control device L3 Light control device L4 Light control device K Stellar projection cylinder control device

Claims (7)

  The projected star pattern was drawn on an optical planetarium that obtains a star image of the whole sky by projecting the projected image of each divided plane divided by the whole sky by an individual star projection cylinder having a projection master and a light source. Divide the star base plate in each star projection tube into multiple projection areas, illuminate each area with multiple individually dimmable light sources, and change the light quantity of a specific area in the star base plate to the light quantity of other areas A planetarium production method characterized by projecting the specific area so as to be conspicuous to the audience by relatively changing the area.   The planetarium rendering method according to claim 1, wherein the amount of light in a specific area in the star original is blinked at a constant interval.   3. The planetarium rendering method according to claim 1 or 2, wherein an impression is given to a spectator by sequentially changing a specific region in which the amount of light is changed relative to the amount of light in other regions.   4. The planetarium rendering method according to claim 1, wherein a projection area obtained by dividing an area where an arbitrary constellation is projected.   4. The planetarium rendering method according to claim 1, wherein a projection area obtained by dividing an area where an arbitrary asterism is projected.   4. The planetarium rendering method according to claim 1, wherein a projection area obtained by dividing an area where an arbitrary constellation and asterism are projected is used.   The planetarium rendering method according to any one of claims 1 to 6, wherein a projection area is obtained by dividing an area where a single nebula cluster or star is projected.