This coma is equal to that of an equivalent single parabolic mirror. In all classical reflectors, spherical aberration is completely corrected, but appreciable coma restricts the field of view. In a Cassegrain reflector with a secondary mirror that reduces the beam convergence and is positioned in front of the prime focus (Figure 1, c), the secondary mirror is a convex hyperboloid in a Gregorian reflector with a secondary mirror that increases beam convergence and is located behind the prime focus (Figure 1, d), the secondary mirror is a concave ellipsoid and in the afocal Mersenne reflector system (Figure 1, e), the secondary mirror is a paraboloid. In classical two-mirror reflectors, the primary mirror is a paraboloid and the secondary mirror has the form of some quadric surface of revolution. Each of these arrangements can reduce the convergence of a beam of light, thus increasing the focal length and image scale in comparison with the focal length and image scale at the prime focus, or it can increase beam convergence, thus reducing the focal length and image scale. The secondary mirror may be placed in front of the prime focus of the primary mirror or behind the prime focus. Optical diagrams of reflectors: (a) prime focus, (b) Newtonian, (c) Cassegrain, (d) Gregorian, (e) Mersenne, (f) NasmythĪ two-mirror reflector uses two mirrors-a primary and a secondary-with curved figures and an arbitrary number of plane mirrors that direct the light to a point convenient for observation. It can also be used to directly play media from many formats and will live-transcode many formats that are natively incompatible formats.Figure 1. It is able to transmit at 1080p (instead of being capped at 720p), is able to capture audio and video from all applications (not just the browser), can mimic a second display (mac only), and can also mirror to multiple destinations simultaneously. Our AirParrot software is comparable to the Google Cast extension, but provides some additional features. This most recent version adds the ability to broadcast mirror content (alongside audio and video annotation) to youtube live for tele-presentations. Another place where Reflector is useful is in meetings or classrooms with computers connected to projectors or large TVs the instructor mirrors their power-point, webpage, or drawing application from their tablet to the computer. Some people use it to record demo videos for Android applications or record game play. It effectively pretends to be a Chromecast device and lets Android devices, Chrome browsers, and Chromebooks mirror their screen to your PC or Mac.
u/ShAd0wMaN - Reflector is a receiver, rather than a transmitter.
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