The optical design of a semi-spherical screen fish-eye objective with field angle 180 degrees has been studied.

本文讨论了视场等于180度的球幕鱼眼镜头的光学设计问题。

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As you watch the programme projected on the large spherical screen, you will realise that our planet is facing many threats and the system as a whole is very fragile.

从投影在大型球幕上的节目中，你会明白到地球正面临着种种威胁，而整个系统亦已变得非常脆弱。

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To Ensure realization of those parameters, criteria for designing, manufacturing and testing of spherical mirror and back projection screen of this system are discussed.

本文重点介绍了WIDE系统的设计原则和技术指标的确定，以及为保证指标的实现，确定球面反射镜和后投影屏设计、制造和检测指标。

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Samsung is attempting the latter with its S2, a spherical, screen-less player nicknamed Pebble.

FORBES: IPod Battles Rage On

To maintain an accurate image, the XV-Z15000 includes Keystone Correction, which corrects spherical, cylindrical and trapezoidal distortion of an image on a flat screen.

ENGADGET: Sharp shows off the XV-Z15000 1080p projector