Ellipsoid formula

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AC Turner · 2006 · 478 — We present the first experimental demonstration of anomalous group-velocity dispersion (GVD) in silicon waveguides across the telecommunication bands. We show ...

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In that production, Holder arranged hundreds of lights to turn the stage into what looked like boundless landscape. His lighting painted a brilliant African sunrise, a blue-black night full of stars, and a thunderstorm slashed with lightning. “The job for me … for The Lion King was to create a luminous world, a magical, vibrant world filled with light that evoked the majesty of the Serengeti, the majesty of natural light in Africa,” Holder commented in an interview.

Ellipsoidalshape

Different types of stage lights are called on to do different jobs. The lights hanging above the stage usually cover the performance area in general light. But imagine actors performing beneath those lights. The tops of their heads will be well lit, but their faces and bodies will be masked in shadows.

This measuring shop microscope offers 100X magnifications with color USB camera. Combining compact design and exceptional precise optics, it is an ideal shop tool, giving clear images with flat field of view. WF10X eyepiece with direct reading reticle (no calibration required) shows metric scales and allows for precise measurement. Adjustable penlight makes it versatile. The digital camera captures still images and video, and allows you to view a live stream on your PC. The included software for Windows offers image-development and measurement tools, as well as advanced compositing features such as image-stitching and extended-depth-of-focus. Independent preview and capture resolutions allow you to view high-speed video while capturing high-definition images. On Mac computers, the camera can be used as a driverless imaging device, compatible with various applications, such as ProScope and Photo Booth. This microscope system offers high quality clear images and unbeatable low price.

Next time you walk into a theater, look up and around. You will see lighting fixtures of different shapes and sizes. Each design manages different stage lighting needs. In addition to the ERS, here are three common types of stage lights:

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Take a peek behind the red curtain and discover the artistry and history behind the world of theater. Explore the playwriting process first-hand, learn about the cultural impact of performance, and read and perform some of the most influential works of the 20th century.

EllipsoidalStage Light

Andover offers a first-surface variant of its standard UV optical bandpass filter. The coatings are deposited on a single surface of a UV-Grade Fused Silica ...

Here’s a handy guide to some basic stage directions, the most common parts of a theater, and different types of theater spaces

These spotlights are designed to highlight a specific performer in a powerful circle of light. Followspots are operated by hand. You can usually spot them on platforms along the back or side walls of the theater.

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You may also hear long-time stagehands call it a “Leko,” pronounced LEE-koh. The nickname is a combination of the last names of James Levy and Edward Kook, who invented this style of stage light in the 1930s.

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The “ellipsoidal reflector spotlight,” or ERS, has been called by various names through the years. Theater professionals may refer to it as an “ellipse” or “ellipsoidal.” “Source Four” is a brand name, and that term is used, too.

Ellipsoidallight

The ERS has the ability to perform many functions in a theatrical production, from general lighting to fun special effects. No wonder this stage light continues to be a favorite tool of lighting designers in theaters around the world.

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Parabolic Aluminized Reflector lights, or PAR lights, look like big cans. They cast an oval pool of light over a large area.

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“One of the jobs of a lighting designer is to be an illusionist; to convince the audience they’re somewhere special,” says Donald Holder. Holder has won a lot of praise for his lighting designs, including a Tony Award® for the hit Broadway musical The Lion King.

The ERS is famous for its bright, focused light and many uses. It can highlight performers for their big number. It can help turn a nighttime scene into a bright summer day. Other gear can be added to the ERS to shine splashes of color, unique shapes, or even special effects like rain, water, and fire.

Ellipsoidaldefinition

Pronounced freh-NELL, this type of light is named for its unique lens. A Fresnel lens has edges that channel a soft-edged beam of light.

This measuring shop microscope offers 100X magnifications with color USB camera. Combining compact design and exceptional precise optics, it is an ideal shop tool, giving clear images with flat field of view. WF10X eyepiece with direct reading reticle (no calibration required) shows metric scales and allows for precise measurement. Adjustable penlight makes it versatile. The digital camera captures still images and video, and allows you to view a live stream on your PC. The included software for Windows offers image-development and measurement tools, as well as advanced compositing features such as image-stitching and extended-depth-of-focus. Independent preview and capture resolutions allow you to view high-speed video while capturing high-definition images. On Mac computers, the camera can be used as a driverless imaging device, compatible with various applications, such as ProScope and Photo Booth. This microscope system offers high quality clear images and unbeatable low price.

Lighting designers like Holder constantly experiment with new gear to create their art. But one of their old favorites is the ERS, short for “ellipsoidal reflector spotlight.”

Ellipsoidaljoint

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That is where the ERS shines to the rescue. This cannon-shaped light shoots a tight, bright beam across long distances. That means rows of ERS fixtures can be placed above the audience and in the back of the theater. From that angle, these lights reveal performers’ costumes, actions, and facial expressions.

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Ellipsoidalpronunciation

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ERS fixtures come in different sizes that feature different “beam spreads.” Beam spreads describe the area covered by light across a certain distance. Some ERS models cover wide areas with light. Others are built to throw a tight beam in order to zero in on a specific spot on stage.

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Discover the common movie of row and column actors by playing this engaging match-up.