Application Note for Theater Spot Lights
Application Note for Theater Spot Lights
Spot lights are one of the most well-known theatrical tools. They highlight a specific character or element and can be paired with coloured filters to draw the audience’s attention. They also separate a character from the backdrop and characters around them during important dialogue to stress their actions, emotions or expressions.
Focused Beams
Focused beams are created using diffractive elongated focal elements. These lenses have a much longer depth of focus than a standard Gaussian beam, but also reduce the energy density at the center of the spot. This application note is Theater spot lights designed to aid the user in understanding the functionality and considerations when using this type of element.
The radiated pattern of an unexpanded beam is a cylindrical near-field and a conical far-field. When a system is used to expand the beam, the input diameter is reduced by a factor of MP, which results in a smaller output spot and lower spherical aberration (Zemanek, 1971). However, there is an increased risk of beam wander because the beam is actually expanded by a number of discrete portions that all have small depths of focus.
This fixture features motorized focus, a variety of control options including DMX and RDM, as well as two prism effects (rotatable 8-facet circular and rotatable 6-facet linear, prism layering). It offers 13 dichroic colors plus white, 14 fixed GOBOs, and open and GOBO shake effect.
Dynamic Beams
To improve laser cutting processes and material processing capabilities, Dresden Institute researchers designed a system that can send multiple beams in different directions at the same time. The system consists of a rigid aluminum frame and mass that rests on a stable surface, such as a floor, rather than a table. A shaker generates vibration that carries the beams through a single degree of freedom motion that is perpendicular to gravity. Testing will determine the possibilities and limits of the dynamic beam system. The goal is to compare the performance of the system to a static beam reference system. The results will be useful for future research, design and development efforts.
Adjustable Beams
The four-point adjustable spread style lifting beam is ideal when headroom is limited and multiple Side Emitting Led Light Bar lift points are needed. It is also a great choice when transferring heavy & massive loads.
Crafted with a durable, suede-like, slip resistant material to give the athlete optimal stability during beam routines. It meets USAG, NCAA and NFHS competition specifications. Its urethane spring maintains its shock-absorbing properties with repeated impacts over time.
Easy, one-person adjustability between 50cm and 125cm heights to accommodate gymnasts of all ages and skill levels. It also features the new, tight fitting beam end caps that don’t pop out during dismounts.
Controlled Beams
The cellular geometry of the structural beam is optimised by the Covariance Matrix Adaptation Evolution Strategy (CMA-ES) optimisation algorithm in order to achieve the desired deflection profiles. The same set of experimental and target deflection conditions are used in both optimisation experiments. The results show that the optimised structure could provide close match of experimental and numerical deflection responses when the voxel subdivisions of the beam are varied. Even with the asymmetric single void structure, the deflection profile can be controlled well for both compression and tension loading cases. The cellular structures also correlated well with the physical manufacturing method when tested in a single material additive manufacturing process.
