What is Holography?  Types of Holograms  How is a Hologram Made?  Lighting Instructions  About Universal Hologram  
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ABOUT UNIVERSAL HOLOGRAM

 

What Is Holography?

   and, How To Light A Hologram

One-of-a-Kind Holographic Artworks

Limited Edition Transmission Holograms

Limited Edition Reflection Holograms

Open Edition Holograms

Custom Holograms

Holographic Exhibitions

Laser Light & Sound

 

 

 

 

 

 

 

side & top panel, brief part of Clouds by Nancy Gorglione

About Universal Hologram

Universal Hologram is the web name for Cherry Optical Holography. Cherry Optical Holography makes some of the finest art and display holograms in the World. We  design, sell and exhibit holograms around the World.

 

What We Do:

At Cherry Optical Holography, we typically record on high resolution silver halide film and glass plates. We welcome custom commissions for the creation of the finest in holographic art. Three-dimensional imagery, spacious and scientific diffraction effects, dazzling colors, space-within-space, and engineering specialties are all within our repertory of skills.

What We Do Not Do:

We do not make photoresist masters or embossed copies. We do not do mass production holography. 

Who We Are:

Nancy Gorglione is an award-winning holographer committed to creating holographic artwork of the highest beauty, while consistently furthering the uses of technology as creative arts’ media.

Greg Cherry is fond of "pushing" the holographic technology, so that we can honestly say that our holograms are always among the best in the world. Mr. Cherry's capacities as electro-optic prototype engineer, join Nancy's spatial concepts to allow us to both envision and fulfill all aspects of holographic creation, from idea and object design, silver halide holographic processing, to installation and lighting.

brief answer... 

Holography is three-dimensional laser photography. The hologram is a true, three-dimensional record of the original object. It contains depth and parallax, which is the ability to see around the object to objects placed behind.

followed by a more in-depth answer...

The word, hologram is composed of the Greek terms, "holos" for "whole view"; and gram, meaning "written". A hologram is a three-dimensional record of the positive interference of laser light waves. A technical term for holography is wavefront reconstruction. 

In holography, we record the positive interference of matching wavefronts of laser light. This three-dimensional record is formed as a diffraction pattern; a series of very fine lines, or concentric circles. This diffraction grating bends the viewing light back onto the path of the original recording wavefronts of laser light. The three-dimensional version of the object - the hologram - is reconstructed as light.

Types of Holograms

There are two basic types of holograms:   transmission holograms and reflection holograms. Transmission holograms are clear film windows which transmit the viewing light. Reflection holograms are high contrast with dark backgrounds which reflect the viewing light.

Transmission holograms are usually recorded on film, which we laminate to Plexiglas. The resulting hologram is a clear window onto a holographic world which contains maximum depth, projection and parallax. However, the holographic imagery is only on a horizontal plane. Viewed vertically, or up and down, the holograms travel through a colorful rainbow smear, or spectral shift in color. Hence, transmission holograms are often called "Rainbow Holograms." Rainbow holograms can contain shifting, overlapping colors and imagery of flowing motion of great beauty and interest.

Reflection holograms contain full parallax, with up to a foot of depth and projection on both horizontal and vertical planes. Reflection holograms’ sharp, high-contrasting imagery usually play back in a single color. Through photochemical techniques and double exposures, incredible colors can be obtained.

How are Holograms Made?

Our holograms are made on a large stable table with a laser, lenses, mirrors and other optics. The table is composed of a large mass resting on a vibration isolation system to dampen any movement. Since the hologram records light waves, movement as small as one-quarter of a wavelength of light will ruin the hologram.

To make a hologram, the laser beam is split into two beams. One part of the laser beam is directed by mirrors and spread by lenses to illuminate the object. The laser lights the object, then bounces off and hits the holographic film or plate positioned in front of the object. The other

portion of the laser beam, called the reference beam, is directed by mirrors and lenses to evenly illuminate the film. Where the two portions of the laser beam meet at the film, they interfere constructively and record the hologram.

This "constructive interference" of laser light's waves is similar to the ocean's waves traveling onto the beach. When two waves meet just right, their collision enlarges or amplifies their size. In holography, this wave amplification exposes the holographic film.

After exposure, the holographic film is developed, similar to black and white photography. After processing and drying, the hologram is ready for viewing. This series of steps results in a laser-viewable "Master" hologram.

White-light viewable holograms are created in a two step process. First, the laser-viewable Master is holographed. Then, a second hologram is made from the projected pseudoscopic image of the Master. This hologram can be reconstructed - viewed - in white light. The section on "Lighting Instructions" explains viewing a white-light hologram.

 

What We Also Produce:

Universal Hologram is our web domain for

Holographic Art

Laser Lighting

Holographic Lasers and Music

 

Nini Gorglione is also the author of  Holographic Books, which can be explored at Primordial Mind Press's website: www.primordialmindpress.com

 
email us
universalholo@comcast.net
 
 
 
Opposite: jpeg of Spacebook Hologram
 
This is a favorite hologram in  fine collections worldwide. Stephen Benton bought one. We have a few copies left for the discerning collector.

side panel from Talk To Me Hologram by Greg Cherry

 

Lighting Instructions

A light is needed to illuminate a hologram. A hologram is illuminated by shining the light at the center of the hologram. For ease of viewing, this angle is usually about 45 degrees from the center of the vertical hologram to the light source. This lamp should be at least four feet above the hologram for the best results. For best clarity, there should be no other lights striking the surface of the hologram.

The quality of the light source that illuminates your hologram is very important. The sharper the light source, the sharper the image in the hologram. We recommend a light that uses a 12 volt, 50-75 watt MR-16 quartz halogen bulb. Another light which works well is the Phillips Master Line, 60 watt PAR-16, narrow spread. These lights can be purchased at most lighting stores. We provide lighting with all of our holograms except the "Open Editions." 

The light should be at least four feet away from the hologram; and shine on the hologram from above at an angle of approximately 45 degrees.  Reflection holograms use front lighting. Transmission holograms are illuminated from behind.

 

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