Rob recommended 'the Front Silvered Mirror'
Because the visual feedback of product will be shown via a projector, it will set up celling or floor. But a projector cannot work as like that because of fan, lens,,,by weigh. So Rob recommended 'the Front Silvered Mirror'.
Hence, I found out some information and price of the Front Silvered Mirror via searching Internet.
What is the Front Silvered Mirror?
"A typical household mirror is a sheet of clear glass with the reflective silver coating applied to the back. This means that the reflective surface of the mirror is protected by the layer of glass itself. The drawback to this is you can sometimes see double reflections - light reflected both from the surface of the glass and from the silvered rear surface.
Front silvered mirrors have the silver coating applied to the front. They therefore avoid the problem of double reflections but are extremely vulnerable to damage, as the silvered surface is exposed. Such mirrors are commonly used in SLR cameras."
NK Guy, PhotoNotes, 3/Apr/2002, <http://photonotes.org/cgi-bin/entry.pl?id=Frontsilveredmirror> [07/Aug/07]
"Front silvered mirrors, where the reflecting surface is placed on the front surface of the glass, have a better image quality but are easily scratched and damaged."
from wikipedia, 6/Aug/2007 <http://en.wikipedia.org/wiki/Mirror> [7/Aug/2007]
We found out acrylic front silvered mirror, it's cheap that £10 (50*50cm). But it's problem because if I'm going to use near projector, it will be slightly bend. But just try! also normal mirror.
Why do I use 'the Front Silvered Mirror Glass'?
"In a plane mirror, a parallel beam of light changes its direction as a whole, while still remaining parallel; the images formed by a plane mirror are virtual images, of the same size as the original object (see mirror image). There are also concave mirrors, where a parallel beam of light becomes a convergent beam, whose rays intersect in the focus of the mirror. Lastly, there are convex mirrors, where a parallel beam becomes divergent, with the rays appearing to diverge from a common intersection "behind" the mirror. Spherical concave and convex mirrors do not focus parallel rays to a single point due to spherical aberration. However, the ideal of focusing to a point is a commonly-used approximation. Parabolic reflectors resolve this, allowing incoming parallel rays (for example, light from a distant star) to be focused to a small spot; almost an ideal point. Parabolic reflectors are not suitable for imaging nearby objects because the light rays are not parallel.
A beam of light reflects off a mirror at an angle of reflection that is equal to its angle of incidence (if the size of a mirror is much larger than the wavelength of light). That is, if the beam of light is shining on a mirror's surface at a 30° angle from vertical, then it reflects from the point of incidence at a 30° angle from vertical in the opposite direction.
This law mathematically follows from the interference of a plane wave on a flat boundary (of much larger size than the wavelength)."
If I need real the Front Silvered Glass Mirror, I will take this. But it's small & heavy. <http://www.greenweld.co.uk/cgi-bin/ca000001.pl>
we've got mail from expert he said we may be able to use normal mirror.
we are going to try.
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