1. Field of the Invention
The present invention relates generally to theatrical productions. More particularly, the invention concerns a method and apparatus for producing optical illusions.
2. Discussion of the Prior Art
A number of methods and apparatus for producing optical illusions have been suggested in the past. A very early apparatus of this type was disclosed by Pepper and Walker in U.S. Pat. No. 221,605 that was first patented in England in March of 1879. Pepper and Walker suggested an arrangement of apparatus to render an actor or object gradually visible or invisible at will and also to substitute for an object in the sight of the audience the image of another similar object hidden from direct vision without the audience being aware that any such substitution had been made. At the heart of the Pepper and Walker apparatus was a large plate of glass which was transparent and more and more densely silvered in passing from one end toward the other end. The plate glass was placed diagonally across the stage so that as it was advanced the glass obscured the view of the actor or object in front of which it passed and substituted the reflection of an object in front of the glass, but suitably concealed from the direct view of the audience.
In recent years, a number of different types of apparatus have been suggested for performing optical illusions both on stage and in the media of television and motion pictures. These apparatus tend to be quite elaborate and are typically complex and usually quite expensive. The thrust of the present invention is to provide a method and apparatus for performing optical illusions that is of a simple construction and one that can be relatively inexpensively constructed and easily set up for performing optical illusions on a conventional theatrical stage. However, the apparatus can be readily adapted for use in other performing media.
By way of brief summary, a principal object of the present invention is to provide a method and apparatus for use in connection with a theatrical stage presentation for rendering an actor or object located on the stage visible or invisible at will.
In one form of the apparatus of the invention a strategically located, selectively transparent screen and a large, generally vertically extending mirror are used to create the illusion. In accordance with one form of the method of the invention the mirror is controllably moved across the stage at a location intermediate a rear wall and the selectively transparent screen from a first position out of sight of the audience to a second position wherein said mirror is disposed between the rear wall and the selectively transparent screen.
With the forgoing in mind, it is an object of the present invention to provide a method and apparatus for creating an optical illusion wherein actors or other objects on the stage are made to appear to magically vanish.
Another object of the invention is to provide an apparatus of the aforementioned character which is of a simple, straightforward construction and easy to set up and use.
Another object of the invention is to provide an apparatus as described in the preceding paragraphs which is relatively inexpensive and is adapted to be used on a conventional theatrical stage.
Referring to the drawings, and particularly to
As illustrated in
Disposed out of sight of the audience and partially behind a portion of the superstructure 24 is a generally vertically extending mirror 28. Mirror 28, which has a reflective front surface 28a, is controllably movable along transversely extending line 20 from a first position out of sight of the audience (see
Positioned between the audience “A” and the generally vertically extending mirror 28 is a selectively transparent, perforated screen, or scrim 30, which is of a character well known to those skilled in the art. Screen 30, which is maintained substantially parallel to mirror 28, has a front surface 30a and a rear surface 30b that is provided with a second image 32 that generally corresponds to the mirror image of the first image 26 that is formed on rear wall 18. More particularly, as will be discussed in greater detail in the paragraphs which follow, image 32 is formed on rear surface 30b of the scrim in a manner such that when the mirror 28 is moved across the stage and the image 32 is reflected from the front surface 28a of the mirror, the audience will believe that they are at all times seeing the rear wall of the stage rather than the reflection of the image formed on the scrim 30.
For a purpose presently to be described, the apparatus of the present embodiment of the invention further includes first and second light sources 34 and 36 that are mounted on the stage superstructure in a manner to selectively illuminate the stage and the front and rear surfaces 30a and 30b respectively of the screen 30 (see
Referring particularly to
As best seen in
Also positioned on the stage proximate the central viewing area is a fifth object that here comprises a table 50. Table 50, which is of the unique bisected construction best seen in
In carrying out one form of the method of the invention for performing the optical illusion, the theatrical stage is first arranged in the manner shown in
As is well understood by those skilled in the art, the scrim 30, which is typically constructed from a perforated fabric or the like, appears opaque when front lighted and transparent or translucent when back lighted. Accordingly, in carrying out the method of the invention, when light 34 is illuminated, the scrim will appear opaque to the audience. However, when light 34 and the stage 16 are illuminated, the scrim will appear substantially transparent to the audience and the audience will see the image on the rear wall 18 as well as the various objects on the stage in front of the rear wall.
Referring to
When the mirror is further advanced along the transversely extending line 20 from the position shown in
Having now described the invention in detail in accordance with the requirements of the patent statutes, those skilled in this art will have no difficulty in making changes and modifications in the individual parts or their relative assembly in order to meet specific requirements or conditions. Such changes and modifications may be made without departing from the scope and spirit of the invention, as set forth in the following claims.