GOBO Glass - http://www.bycunited.com/en
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GOBO Glass
The word "gobo" is used in the world of light and lighting to mean a stencil or template placed inside or in front of a light source to control the shape of the emitted light. The origins of the word are not proven but some sources quote it as possibly being an acronym for "graphical optical black out". The creativity allowed by glass gobos knows no bounds. Its used for stage lighting instruments, architectural lighting, projecting a company logo, creating moving shapes at nightclubs and other musical venues, weddings and corporate events, manipulating the shape of the light cast over a space or object. They can be in continuous use professionally and hold their colour whereas traditional slides and films begin to fade after a short time.
Glass gobos are made from clear glass with a partial mirror coating to block the light and produce "black" areas in the projected image. This eliminates any need for bridging and accommodates more intricate images. Glass gobos can also include colored areas (much like stained glass windows), whether by multiple layers of dichroic glass (one for each color) glued on an aluminium or chrome coated black and white gobo, or by newer technologies that vary the thickness of the dichroic coating (and therefore the color) in a controlled way on a single piece of glass—which makes it possible to turn a color photo into a glass gobo. Glass gobos generally offer the highest image fidelity, but are the most fragile. Glass gobos are typically created with laser ablation or photo etching.
