Holograms
Hologram on Stage
Dancer: Minna Tervamäki. Video production and cinematography: Ali Kesanto.
A hologram screen gives the performance stage an entirely new digital dimension. Digital effects or presentation content can be projected around a live performer using a video projector. A performer can appear on stage via live video stream or as a pre-produced video recording. Holographic performances should always be planned in collaboration with a lighting designer to ensure the illusion works effectively.
Hologram Fan
A hologram fan uses a central electric motor to spin two or more LED-equipped blades, similar to a fan. The device’s software flashes the LEDs on the blades in sync with the rotation speed, and the result is an image or video that appears to float in mid-air. If the hologram fan is placed within reach of people, it can be housed in a transparent protective enclosure made of glass or plastic. The largest hologram fans typically have a diameter of 100 cm, but larger holograms can be created by combining multiple units.
Holographic Rear Projection
Holographic rear projection film is close to transparent but reflects light projected onto its surface from a projector. These films typically transmit 90–95% of light, which means the final destination of the transmitted light must be taken into account when planning the installation. At trade shows, for example, it is often best to place the projector on the floor so that the light passing through the film disappears into the high ceiling of the exhibition hall. Sometimes the effect created on the booth’s own floor can work in your favor, and the projector can be positioned overhead pointing downward. Light projected at a straight angle tends to hit the viewer’s eye directly, which is why this approach is not recommended.
Hologram Display Cases
Hologram display cases work by reflecting the image from a horizontally oriented screen — facing up or down — into the viewer’s eye through a transparent piece of glass, plastic, or mirror film set at a 45-degree angle. A four-sided hologram display case uses a transparent pyramid with a truncated tip pointing up or down, with four small screens positioned at the tip end of the pyramid. Physical products can be placed inside the pyramid, allowing projected animations to highlight product features and create strong brand impressions.
Holographic Mirror Film
Holographic mirror film is used in cases where a hologram display case is not possible due to structural size, durability, or logistical constraints. On performance stages, for example, holographic mirror film can create large and impressive illusions of performing artists. Holographic mirror film works on the same principle as hologram display cases, reflecting the image formed on the actual projection surface into the eyes of the audience. The success of the illusion depends on several factors, the most important of which is preventing the audience from seeing the actual projection surface, which is usually built into the stage floor or a recess beneath it. It is also important that the mirror film is stretched perfectly flat. The illusion can also fail due to the choice of projection surface and projector, particularly if the screen contrast is not excellent.
Transparent Screens
Transparent LCD displays are the easiest and most flexible way to create a high-quality holographic effect for marketing use. The screen remains transparent except for its frame when the image is black. Colored content appears on the surface and creates a holographic effect. Transparent LCD displays can be integrated into, for example, refrigerator doors in stores and other creative locations such as room dividers or partition walls.
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