Parabolic mirrors offer excellent correction of spherical aberration. Parabolic mirrors can either be on-axis or off-axis. On-axis parabolic mirrors produces collimated reflected light. Off-axis parabolic mirrors focus reflected light to a focal point off-axis. An important dimension to consider is the diameter. The diameter of the mirror if viewed straight on can also be thought of as the height. Another important parameter is the focal length. Focal length is the distance from the mirror the...
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Q & A on Parabolic Mirrors
We asked our users for their input on Parabolic Mirrors. Here are the results of 202 users familiar with Parabolic Mirrors.Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice
Who Took Our Poll?Top
The aperture for conventional mirrors is getting limited and it is very expensive to make mirrors of apertures more than 6 m. Reflective film technology is still in testing phase, and is not used at a commercial level. Another technology is with thin glass using a top protective layer of Aluminium Oxide.
Applications and UseTop
IR and THz beam extractor. IR and THz Beam condenser for Synchrotron-based Interferometer.
I use parabolic mirrors in solar thermal energy, building and designing parabolic trough and parabolic disc to produce process heat or electricity.
It hasn't been used yet for personal residential electricity generation. Combine a trough parabolic mirror with a linear Fresnel lens and a 10kwatt low temp ener-g-rotor unit and you could supply a home with almost no mechanical parts. Cost is the only problem. Let's make the problems stop. That's what we do, solve problems.
Emergency fire starting kit for outdoor enthusiasts and campers. Pool heating with parabolic mirrors recessed into the pool deck. Portable water heating for outdoor enthusiasts or campers. Portable water distillation and sterilization for impoverished countries.
We have seen commercial cassegrain optics that do not work well because of the lack of adjustment possibilities of the mirrors and / or the receiver in the focus.
Folks get severe burns and permanent eye/vision damage. The extreme heat can create explosions with improper use.
First: a flat mirror attached to the parabola to help align it. Second: for off-axis parabola, better precision for high off-axis/angle. The manufacturing precision is good for small off-axis angle but can be really problematic for high angle (up to 90 degrees).
Prefer troughs with rather small aperture dimension, choose weatherproof coatings, check the shape efficiency of the trough.