JP2003122247A - Planetarium equipment and star field projection original plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planetarium equipment and a star field projection original plate which can project the Milky Way, etc., with realistic touches and with excellent gradation between magnitudes of stars. SOLUTION: The star field projection original plate is constituted of a Milky Way area 1 corresponding to the Milky Way, star nebulae, star clusters, etc., and the other non-Milky Way area 2. The Milky Way area 1 is composed of a high density area 11 where the stars are highly accumulated and the other low density area 12. The marginal magnitudes of processed stars are made to be in different values in each area. By using the projection original plate, the star field including the Milky Way, etc., can be projected in good condition without making the inside of a dome bright.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planetarium device and a Hoshino projection original plate used therein. More specifically, the present invention relates to a planetarium device and a Hoshino projection original plate that project a portion of the Milky Way, a star cluster, or the like that can be visually perceived brightly along with other portions.

[0002]

2. Description of the Related Art Conventionally, as a projection device for projecting the Milky Way on a dome screen, a projection original plate for projecting a fixed star,
A projection projection plate that projects a constellation picture, the Milky Way, a part of a star cluster or the like with a high concentration of stars (hereinafter referred to as "Milky Way, etc."), and overlaps projection images from both projection projection plates (Patent No. 2516143) It has been known.

Further, when a laser is used for drilling holes in a projection original plate, it is possible to create more than 100,000 stars in the whole sky, which are 9th magnitude stars or less. In this case, the Milky Way or the like can be expressed as a set of stars without dividing the projection original plate into those for the stars and the one for the Milky Way.

Further, in the planetarium, the dome screen is divided into a plurality of areas as shown in FIG. 6, and a projector corresponding to each area projects each area. Therefore, some of the adjacent areas are projected while overlapping. Then, a projection method in which either one of the projectors stochastically projects a star included in the overlapping area according to the position of the star (Japanese Patent Laid-Open No. 200-200200).
No. 1-134172) is known.

[0005]

However, the above-mentioned conventional technique has the following problems. That is, when the number of stars is increased by laser processing or the like, the amount of diffused light in the dome screen is large and the contrast between the stars is reduced. Therefore, the gradation between stars is poor. Furthermore, the inside of the dome becomes slightly bright, and the presence of the dome is perceived by the audience. As a result, the sense of reality and depth of the starry sky is lost.

Further, even if one of the star projectors stochastically projects the overlapping portion of the adjacent areas depending on the position of the star, the boundary between the areas may become clear. In this case, the Milky Way will appear to have a seam and the reality of Hoshino will be impaired.

The present invention has been made to solve the problems of the above-mentioned conventional techniques. That is, an object of the invention is to provide a planetarium device and a hoshino projection original plate capable of projecting a real Milky Way or the like, which has a good gradation property between stars.

[0008]

The Hoshino projection original plate of the present invention made for the purpose of solving this problem is divided into an accumulation area where light-transmitting points corresponding to stars are accumulated, and a non-accumulation area other than that. In the accumulation area and the non-accumulation area, the magnitude ranges of stars corresponding to the formed translucent points are different. Further, the planetarium device of the present invention projects the star field by the light transmitted through the star field projection original plate.

Each light-transmitting point of this Hoshino projection original plate corresponds to each star in Hoshino. Light is transmitted to this translucent point,
By projecting the image in the dome, the stars of Hoshino can be reproduced. Furthermore, the light transmitted through the accumulation area is projected as an image of a fixed star, and is perceived by the audience as the Milky Way. The light transmitted through the non-integrated area is recognized as a star other than the Milky Way. Therefore, the range of stars projected is different between the accumulation area and the non-accumulation area. That is, since the number of stars projected in the accumulation area is small, the diffused light in the dome is small. Therefore, the inside of the dome does not become bright, and the sense of reality and depth of the starry sky can be secured. Also, because the entire dome is dark, the contrast of each star's magnitude is clear, and it is possible to project a realistic star field.

Note that the original Hoshino projection original plate here is a plate for projecting stars, stars such as stars, planets, comets, etc., gas such as nebula, dust, etc. in the dome. That is, what is generally called a star projection original is included in this Hoshino projection original.

Further, according to the present invention, in the Hoshino projection original plate, the accumulation area is divided into a plurality of small areas according to the accumulation density of the light transmitting points, and the small area has a star range corresponding to the formed light transmitting points. Better to be different. This makes it possible to reproduce the light and shade of the Milky Way. In other words, the contrast between each area becomes clearer, and the realistic Hoshino can be projected.

Another Hoshino projection original plate of the present invention has a light-transmitting point corresponding to a star, and is divided into an overlapping area overlapping the projection areas of adjacent projectors and a non-overlapping area other than that.
The overlapping area and the non-overlapping area have different star magnitude ranges corresponding to the formed translucent points.
Further, another planetarium device of the present invention projects the star field by the light transmitted through the star field projection original plate.

That is, in this type of planetarium,
By overlapping the projection area of the adjacent projector,
It reproduces Hoshino with no gaps over the entire dome. Here, the overlapping area and the non-overlapping area have different star magnitude ranges corresponding to the formed translucent points. As a result, fewer stars are projected in duplicate and less diffused light in the dome. Therefore, it is possible to prevent the inside of the dome from becoming bright, and to secure the realism and depth of the starry sky.

Further, the planetarium device of the present invention comprises:
For a star in the area where the images from the two Hoshino projection originals overlap, it is better to provide a translucent point corresponding to that star on one of the Hoshino projection originals, based on its class. As a result, there are no duplicated projections of the stars, and the cost of manufacturing the Hoshino projection original plate can be reduced. In addition, since the boundaries in charge of each projector cannot be clearly recognized by the audience, it is possible to project a realistic Hoshino.

Further, in the Hoshino projection original plate, the overlapping area is divided into a plurality of small areas based on the distance from the projection center point of the projector, and the star area corresponding to the translucent point formed by the small areas. It is better if the ranges are different. As a result, it is possible to reduce the number of stars projected in duplicate and prevent the inside of the dome from becoming bright.

Further, it is more preferable that the Hoshino projection original plate has a grade range of stars to be projected set within the overlapping area, and a translucent point corresponding to a star within the set range is formed. As a result, the number of stars formed is reduced and the manufacturing cost can be reduced.

Further, in the Hoshino projection original plate, the class range of stars to be projected is set in the overlapping area based on the distance from the projection center point of the projector, and the light transmission corresponding to the stars within the setting range is set. It is better if the points are formed. As a result, the boundary seams that can be recognized by the audience are not visible. Therefore, the more realistic Hoshino can be projected.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments embodying the present invention will be described in detail below with reference to the accompanying drawings.

The planetarium device of this embodiment has a plurality of star projectors 4, as shown in FIG. Each of the star projectors 4 projects the star field on the inner surface of the dome attached to the planetarium device, and is in charge of the allocated region of the star field of the whole sky. Then, in cooperation with each of the star projectors 4, the image of Hoshino is projected on the entire dome screen.

Next, the structure of the star projector 4 will be described. The star projector 4 has a light source lamp 41 as shown in FIG.
And a condensing lens 42, a Hoshino projection original plate 43, and a projection lens 44. In this star projector 4, a condenser lens 42 is arranged in front of the irradiation direction of the light from the light source lamp 41. The condenser lens 42 has a function of condensing the light flux diverging from the light source lamp 41. further,
A Hoshino projection original plate 43 is arranged in front of the irradiation direction of the light from the condenser lens 42. Since the Hoshino projection original plate 43 has a hole at a position representing a star, light passes through the hole. The light that has passed through the Hoshino projection original plate 43 is projected onto a predetermined position of the dome via the projection lens 44.
This represents the star of Hoshino.

Next, the Hoshino projection original plate 43 will be described. The Hoshino projection original plate 43 is a plate having a hole at the position of a star as shown in FIG. In the planetarium apparatus of this embodiment, the area such as the Milky Way is projected by the Hoshino projection original plate 43 together with the other areas. Therefore, there is no conventional projection original plate and projector dedicated to the Milky Way. Each of the dots in Fig. 3 is a hole, and the diameter of the hole is larger for bright stars. In the present specification, a bright star has a magnitude of “high” and a dark star has a magnitude of “low”.

The Hoshino projection original plate of this embodiment is composed of the Milky Way area 1 corresponding to the Milky Way and the other non-Milky Way area 2 as shown in FIG. Further, the Milky Way area 1 is composed of a particularly bright high density area 11 and other low density areas 12 as shown in FIG. The limit magnitude of the processed star has a different value for each area. The limit grade here is
It is the lowest grade value that can be laser processed. For example, the limit grade of the high-density area 11 is 12, the low-grade area 1
The limit grade of 2 is 10 grade, and the limit grade of Non-Milky Way Area 2 is 7 grade.

Next, the part where the projection areas of the adjacent star projectors overlap will be described. The projection area 3 projected by one star projector in the dome is composed of a non-overlap area 31 and an overlap area 32 as shown in FIG. The non-overlapping area 31 is an area projected by only one star projector. On the other hand, the overlapping area 32 is an area which overlaps with the projection areas of the adjacent star projectors and is projected by a plurality of star projectors. Each of the limit grades described above is a value for the non-overlapping region 31. Overlapping area 3
The Milky Way area 1 in 2 is set to a value different from the limit class of the Milky Way area 1 in the non-overlapping area 31. For example, for the low density area 12 of the Milky Way area 1, as shown in FIG. 7, the limit grade is 9 in the overlapping region and the limit grade is 10 in the non-overlapping region as described above. That is, in the overlap region 32, stars up to 9th grade are processed, and in the non-overlap region 31, stars up to 10th grade are processed. Therefore, stars up to 9th magnitude in the overlapping area 32 are projected from both star projectors. The high density area 11 in the overlapping area 32 is also set to a value different from the limit grade of the high density area 11 in the non-overlapping area 31.

The limit grade of each area is shown in the conceptual diagram of FIG. The numerical value in each area in FIG. 8 indicates the limit grade. First, regarding the limit grades of the high-density area 11 in the Milky Way area 1, the overlapping region 32 is 11th grade and the non-overlapping region 31 is 12th grade. Then, regarding the limit grade of the low density area 12 in the Milky Way area 1, the overlapping region 32 is 9 grade and the non-overlapping region 31 is 10 grade. On the other hand, regarding the limit grade of the non-Milky Way area 2, both the overlapping region 32 and the non-overlapping region 31 are 7 grades.

Next, a method of forming the Hoshino projection original plate in this embodiment will be described. First, as the first step, the shape of the Milky Way area in the Hoshino projection original plate is extracted. As a method of this extraction, there is a method of dividing the shape of the Milky Way written on the star map by RA / Declination coordinates and reading the coordinates that form the contour of the Milky Way. Also, scan the Hoshino picture with a scanner,
There is also a method of dividing the area according to the density of the data. Alternatively, a method may be used in which the entire star density distribution is obtained from the star coordinate data and the area is divided according to the density.
Next, as the second step, set the allowable grade range in each area. The areas here are Milky Way Area 1 and Non-Milky Way Area 2, and also Milky Way Area 1
Then, there are a high-density area 11 and a low-density area 12. Further, in these areas, there are a non-overlapping area 31 and an overlapping area 32. Next, as the third step, drilling holes based on coordinate data and magnitude data for each star (including stars that make up the Milky Way etc.) (hereinafter, both data are collectively referred to as "stellar data"). A data file (hereinafter referred to as "machining data") is created, and holes are machined based on the data file. When this third step is completed, the Hoshino projection original plate is created.

The above-mentioned third step will be described in detail with reference to the flowchart of FIG. First, the star data is read (S1). One star data is read for each star. Next, it is determined which area the position of the star belongs to based on the coordinate data in the read star data (S2). Specifically, it is determined whether or not it belongs to the Milky Way Area 1. Further, if it belongs to the Milky Way area 1, it is determined whether it belongs to the high density area 11. Further, it is determined whether or not it belongs to the overlapping area 32. Next, based on the class data in the read star data, it is judged whether or not the class is an allowable class in the judged area (S3). If the grade is acceptable (S3: Y
ES) adds the star data to the processed data file (S4). After the addition of the processed data (S4) or if the grade is not acceptable (S3: NO), it is determined whether there is the next star data (S5). If there is the next star data (S5: YES), the star data is read (S1). If there is no next star data (S
5: NO) performs hole processing on the projection original plate based on the processing data file (S6). After the processing of S6, the procedure for creating the Hoshino projection original plate ends. Thus, the Hoshino projection original plate in this embodiment is created.

Next, a modified example will be described. The following modifications are realized by setting the grade value in the second step in the method for creating the Hoshino projection original plate. Further, in S3 of FIG. 9 of the third step, the judgment suitable for each is made.

In the first modification, the limit class of the overlapping area 32 is set stepwise based on the distance from the projection center point of each star projector. For example, as shown in FIG. 10, the limit class is set to 9 or 8 based on the distance from the projection center point of each star projector. That is, stars up to the 8th magnitude are processed on both original projections of Hoshino, and stars from the 8th to 9th magnitudes are processed on the projection original closer to the projection center point. For this reason, stars in the overlapping region of magnitudes 8 to 9 are projected from one of the star projectors.

In the second modification, the grade range of the overlapping area 32 is set for each star projector. For example, in FIG.
As shown in, the grade range to be processed is from 10 grade to 0.5.
Etc. are set alternately. Then, for each of the Hoshino projection original plates, holes are drilled only for stars having a magnitude within the set range. That is, on one of the Hoshino projection original plates, stars within the respective ranges of 9.5 to 10.0, 8.5 to 9.0, and 7.5 to 8.0 are processed, and the other Hoshino is processed. For projection originals, 9.0 to 9.
Stars within the 5th, 8.0th to 8.5th, and 7.0th to 7.5th grades are processed. Therefore, the stars in the overlapping area are projected from one of the star projectors. The setting range is set for each overlapping area.

In the third modified example, the range of magnitudes assigned to each star projector is set based on the range proportional to the distance from the projection center point of each star projector. For example,
As shown in 2, the grade range to be processed ranges from 10 grade to 0.
It is set to 5 etc., and within the setting range, the grade for drilling is determined according to the distance from the projection center point of each star projector. That is, in the overlapping area, the stellar magnitude is divided into 0.5 grades such as 9.5 grade to 10.0 grade, 9.0 grade to 9.5 grade, 8.5 grade to 9.0 grade. Has been done. Then, the stars in the overlapping area are processed into one of the starry sky projection original plates according to the position and the magnitude of the star. Therefore, the stars in the overlapping area are projected from one of the star projectors. The setting range is set for each overlapping area.

As described in detail above, in the Hoshino projection original plate used in the planetarium device of the present embodiment, the Hoshino projection original plate is divided into the Milky Way area 1 corresponding to the Milky Way and the other non-Milky Way areas 2. . Also,
The Milky Way area 1 is further divided into a high density area 11 where the stars are densely packed and a low density area 11 other than that. The limit magnitude of the processed star is set to a different value for each area. This reduces the number of stars in the non-Milky Way area 2. For this reason, the diffused light in the dome screen is not so large, and the deterioration of the contrast between the stars is prevented. Also, since the inside of the dome is not brightened, the sense of reality and depth of the starry sky is not impaired. Furthermore, the total number of processed stars is not too large, so the cost is also reduced. Therefore, a planetarium device that can project the Milky Way and the like and a Hoshino projection original plate used for the same can be realized while maintaining good gradation between the stars.

In the Milky Way area, the non-overlapping area limit class and the overlapping area limit class are set to different values even in areas where the projection areas of adjacent star projectors overlap, and the same values are obtained from both star projectors. It is supposed to project the stars. As a result, the number of stars projected in duplicate can be reduced, so that the inside of the dome is not brightened.

In the overlapping area, the limit class is set stepwise based on the distance from the projection center point of each star projector, whereby the number of stars projected in duplicate can be further reduced. .

Further, in the overlapping area, a class range assigned to each star projector may be set, and holes in the stars within the set range may be drilled. This avoids duplicating one star from both star projectors. Also, the boundary seam is not visible so that the audience can recognize it.

In the overlapping area, the class range covered by each star projector may be set based on the range proportional to the distance from the projection center point of each star projector. As a result, there are no stars to project in duplicate, and there is no clear boundary for each star projector. Therefore, a planetarium device capable of projecting a realistic Milky Way and the like and a Hoshino projection original plate used for the device have been realized.

The present embodiment is merely an example and does not limit the present invention. Therefore, naturally, the present invention can be variously improved and modified without departing from the gist thereof. For example, in the present embodiment, the present invention is applied to the original plate incorporated in the star projector, but the present invention is also applicable to the original plate incorporated in the conventional Milky Way projector.

The present invention is not limited to the Milky Way, but can be applied to the case of projecting a portion where a gaseous substance such as a galaxy in the galaxy, a comet, etc. looks bright. However, in this case, since it is not based on the star data, it is necessary to separately create a data file for expressing such a part as a set of virtual stars.

[0038]

As is apparent from the above description, according to the present invention, there are provided a planetarium device and a Hoshino projection original plate which have a good gradation between stars and can project a realistic Milky Way or the like. It is provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a planetarium device according to an embodiment.

FIG. 2 is a conceptual diagram showing a configuration of a star projector according to an embodiment.

FIG. 3 is a schematic diagram of a Hoshino projection original plate according to the embodiment.

FIG. 4 is a configuration diagram (No. 1) of the Hoshino projection original plate according to the embodiment.

FIG. 5 is a configuration diagram (No. 2) of the Hoshino projection original plate according to the embodiment.

FIG. 6 is a conceptual diagram showing an area projected by each star projector.

FIG. 7 is a graph showing a limit class for each area related to adjacent star projectors.

FIG. 8 is a conceptual diagram showing a limit grade of each area according to the embodiment.

FIG. 9 is a flowchart showing a procedure for creating a projection original plate according to the embodiment.

FIG. 10 is a graph showing a limit grade for each area according to a first modification.

FIG. 11 is a graph showing a limit grade for each area according to a second modification.

FIG. 12 is a graph showing a limit grade for each area according to a third modification.

[Explanation of symbols]

1 Milky Way area 2 Non-Milky Way area 3 Projection area for one projector 4 Star projector 11 high density area 12 Low density area 31 non-overlapping area 32 overlapping areas

Claims (9)

[Claims] 1. A transparent area corresponding to a star is divided into an integrated area where the transparent points are integrated and a non-integrated area other than the integrated area, and the integrated area and the non-integrated area correspond to the formed transparent points. A hoshino projection original plate, which is characterized by different star grade ranges. 2. The Hoshino projection original plate according to claim 1, wherein the integration area is further divided into a plurality of small areas according to an integration density of the light transmission points, and the light transmission points formed by the small areas are divided into a plurality of light transmission points. A hoshino projection original plate characterized by different corresponding star magnitude ranges. 3. A light-transmitting point corresponding to a star, which is divided into an overlapping area which overlaps with the projection area of an adjacent projector and a non-overlapping area other than the projection area. , A star projection original plate characterized by different star magnitude ranges corresponding to formed translucent points. 4. The Hoshino projection original plate according to claim 3, wherein the overlapping area is further divided into a plurality of small areas based on the distance from the projection center point of the projector, and is formed by the small areas. A hoshino projection original plate characterized by different star magnitude ranges corresponding to the translucent points. 5. The star field projection original plate according to claim 3, wherein in the overlapping area, a grade range of stars to be projected is set, and a translucent point corresponding to a star within the set range is formed. Hoshino Projection original plate. 6. The hoshino projection original plate according to claim 3, wherein in the overlap area, a class range of the projected stars is set based on a distance from a projection center point of the projector, within the set range. The Hoshino projection original plate is characterized in that a translucent point corresponding to the star is formed. 7. In a planetarium device for projecting a star field by light transmitted through a star-projection original plate, the star-projection original plate is divided into an accumulation area where light-transmitting points corresponding to stars are accumulated and a non-accumulation area other than that. A planetarium device, wherein the accumulation area and the non-integration area have different star magnitude ranges corresponding to the formed light-transmitting points. 8. A planetarium device for projecting a star field by means of light transmitted through a Hoshino projection original plate, wherein the Hoshino projection original plate has a light transmission point corresponding to a star, and is an overlapping area overlapping a projection area of an adjacent projector. And a non-overlapping area other than the above, wherein the overlapping area and the non-overlapping area have different star magnitude ranges corresponding to the formed light-transmitting points. 9. The planetarium device according to claim 8, wherein, for a star in an area where images of two Hoshino projection originals overlap, one of the Hoshino projection originals corresponds to the star based on its class. A planetarium device having a light-transmitting point.