JPH0446417B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for taking a developed photograph of a rotating subject by photographing the subject with a camera.

(Prior Art) It is known that a camera or the like is used to obtain a developed photograph of an object (subject).

This allows a mirror to be placed at a distance from an object fixed in the center and rotated around the object, and as the mirror rotates, the outer periphery of the object is sequentially reflected in the mirror.
A mirror is installed so that the entire outer circumference of the object is reflected in one rotation, and a camera for taking pictures is installed at a position opposite to this mirror so that it rotates integrally with this mirror so that its front side always faces the mirror surface. A developed photograph of the object is obtained by sequentially photographing images of the object sequentially reflected on the mirror using the photographing camera.

(Problems to be Solved by the Invention) However, the conventional method for taking expanded photographs described above involves rotating the photographing camera relative to the object (subject), which requires a large space and requires the use of a large camera. I can't do it, and
There is a problem that the photographic scale cannot be changed and exposure unevenness is likely to occur.Furthermore, the conventional method uses a mirror and the image reflected on this mirror surface is photographed with a camera, so the image cannot be obtained. There was a problem that distortion occurred in the developed photograph, making it impossible to obtain an accurate scale.

(Means for solving the above problems) In order to solve the above problems, the present invention provides a camera 2.
In the method of photographing a developed photograph using the 0 etc., the subject 6 is rotated about its substantially central axis as the rotation axis, and an exposure slit 22 formed in the center of the sliding lid 21 is placed at a position away from the subject 6. The photographing camera 20 is fixed so as to be parallel to the rotation axis and facing the center of the subject 6, and the winding speed of the film 24 of this camera 20 is adjusted to the subject 6.
It is set at a constant ratio to the rotation speed of.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is an overall perspective view showing an apparatus for carrying out the present invention, Fig. 2 is a view showing a connecting part of a rotation mechanism for an object and a film winding mechanism of a photographing camera, and Fig. 3 is a perspective view showing an object. 4 is a front view showing the disc body and the subject, and FIG. 5 is a diagram showing a developed photograph of FIG. 4.

Reference numeral 1 denotes a substantially rectangular parallelepiped-shaped base, with a turntable 2 mounted on its upper surface and a rotation mechanism for rotating the turntable 2 inside.
Also, at the four corners of this bottom, there are 4 supporting bases 1.
Prepare book legs 3,... The turntable 2 has a disk shape, and disk bodies 4 and 5 are placed on top of each other at the center of the upper surface of the turntable 2 with their central axes aligned with the rotational axis of the turntable 2. In this case, the subject 6 is placed with its central axis aligned with the central axes of the discs 4 and 5, and a rod-shaped scale 7 is attached near the subject 6.

This object 6 has a shape in which a cylindrical body 6b with a small radius is superimposed on the center of the upper surface of a cylindrical body 6a with a large radius, and on the side surfaces of each of these cylindrical bodies 6a and 6b,
Pattern lines 9,..., 10,... extend radially alternately from the center of the top surface of each cylinder at central angles of 30 degrees and 60 degrees.
Vertical patterns 11,..., 12,... are provided vertically down the side surface from where they reach their outer periphery, and lines 11a, 11b and 12a, 12b having a central angle of 60 degrees on the side surface are provided with these lines. 11a, 11b
and a circular pattern 11c in contact with 12a and 12b,
. . , 12, . . . are provided at the center position in the height direction of each cylindrical body 6a, 6b. These cylindrical bodies 6a and 6b have similar shapes and patterns with a length ratio of 2:1.

By the way, the disc bodies 4 and 5 placed on top of each other on the turntable 2 correspond to the two cylindrical bodies 6a and 6b, which are the main parts constituting the shape of the subject 6, respectively. The height and radius ratios are equal to the height and radius ratios of the cylindrical bodies 6a and 6b, respectively. Scales 4a and 4b corresponding to the outer circumferential lengths of the main parts 6a and 6b of the subject 6 to which they correspond are attached on the side surfaces (outer peripheries) of each disc body 4 and 5, respectively.

On the other hand, the reference numeral 20 is a photographing camera provided at a position distant from the subject 6;
is fixed so that the exposure slit 22 formed at the center of the sliding lid 21 is parallel to the central axis (rotation axis) of the subject and faces the center of the subject 6. By the way, reference numeral 23 is a winding device for the film 24 provided at the rear of one side of the camera 20.
The winding speed of the film 24 has a certain relationship with the rotational speed of the turntable 2. That is, as shown in FIG.
gear trains 26, 27, 28,
29 and flexible type rotating coupling member 30
is transmitted to the gear train 31, 32, 33 that constitutes the rotation mechanism of the turntable 2 inside the base 2,
The turntable 2 is rotated by rotating a worm gear 33 fixed on the center axis of the lower surface of the turntable 2. The relationship between the rotational speed of the film 24 and the rotational speed of the turntable 2 can be freely changed by replacing appropriate gears such as the gear 31 in the gear train.

The reference numeral 40 is a power source for supplying current to the film winding device 23 and the base 2 of the camera 20, 41 and 42 are various switches, 43 is a lamp, and 44 and 45 are power lines. .

FIG. 5 is a developed photograph of the subject 6 obtained in this example. In this example, the film winding speed is set to the same speed as the outer peripheral speed of the cylindrical body 6a of the subject 6, and the height is 6 and that of the developed photograph were set so that they were the same height. Therefore, in the developed photograph 100, the developed part of the cylindrical body 6a has the same shape as if the side part of the cylindrical body 6a was unfolded as it is, but the developed part of the cylindrical body 6b has the side part stretched twice in the lateral direction. Obtained by shape.
That is, the vertical patterns 111, . . . in the developed photograph 100
are obtained with the same spacing as the vertical pattern spacing 11,... on the side of the cylinder 6a, but the vertical patterns 112,... are obtained with twice the spacing of the vertical pattern 12,... on the cylinder 6b,
Further, the circular pattern 12c also has a shape that is twice as long in the horizontal direction.

Therefore, it is normally difficult to reconstruct the external shape of the subject 6 from only the developed photograph 100, but according to the present invention, the scales 4a and 5a attached to the outer periphery of the disc bodies 4 and 5 and the rod-shaped scale 7a are Since it is shown in the developed photograph 100, the outer shape of the original object 6 can be easily determined from the developed photograph 100 by the ratio of the heights of the scales 104a, 105a and the disk bodies 104, 105, and the bar-like scale 7a, which are shown in the developed photograph. can be reconfigured into Therefore, according to the present invention, it is also possible to easily visualize a subject by obtaining two developed photographs from different angles using two cameras. In addition, the developed photo 100 is A
- A represents one rotation of the subject 6.

By the way, the subject 6 of this embodiment is a cylindrical body 6a, 6
Although the present invention is composed of two main parts (b), the present invention can be similarly applied to a subject having a complicated shape consisting of many main parts. Further, in this embodiment, the turntable 2 rotates following the rotation of the film winding device 23 of the camera 20, but it is also possible to rotate each turntable at a constant rotational speed using independent power sources. May be set.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, since the object (subject) is rotated relative to the photographing camera, a large space is not required and even a large camera can be used. Further, the photographing scale can be changed appropriately, and exposure unevenness can be prevented. Furthermore, since the present invention does not use a mirror, there is no distortion in the developed photograph, and an accurate scale can be obtained.

In addition, according to the embodiment of the present invention, since the disk bodies corresponding to the main parts of the subject and having scales attached to the outer periphery are overlapped and rotated together with the subject, the original The external shape of the subject can be easily reconstructed, and the subject can also be easily visualized from two developed photographs obtained in the same way from different angles using two cameras.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view showing an apparatus for carrying out the present invention, Fig. 2 is a view showing a connecting part of a subject rotation mechanism and a film winding mechanism of a photographing camera, and Fig. 3 is a perspective view showing a subject. 4 is a front view showing the disc body and the subject, and FIG. 5 is a diagram showing a developed photograph of FIG. 4. In the drawing, 4 and 5 are disk bodies, 4a and 5a are scales, 6 is a subject, 20 is a camera for photography, and 21
2 is a sliding lid, and 22 is an exposure slit.

Claims (1)

[Claims] 1. In a method of taking a developed photograph using a camera, etc., the subject is rotated around its central axis, and the subject is placed at a distance from the subject.
A photographing camera is fixed so that the exposure slit formed in the center of the lid is parallel to the rotation axis of the subject and faces the center of the subject, and the film winding speed of this camera is kept constant with respect to the rotation speed of the subject. A method for taking a developed photograph, characterized in that the ratio is set to .