[Laser] Cheap 8x11 Lens

Mon, 04 Feb 2002 16:09:18 -0500

The lens in discussion sounds like the Bausch and Lomb Manga-Page full page
magnifier (# 81-90-07). It is 2X magnification and about 8.5 and 11 and very
rigid, as opposed to those thin fresnels. It is easily mounted and is
curently at Staples for $4.98. I noticed the lens has about .25" of border
around it, and "Magna-Page" is printed directly on the bottom left hand
corner of the lens.

----- Original Message -----
From: Karel Kulhavy <[email protected]>
To: <[email protected]>
Sent: Monday, February 04, 2002 9:56 AM
Subject: Re: [Laser] Cheap 8x11 Lens

> >
> > I taped one of these Fresnel lenses to a sheet of glass (at the corners)
> > for extra rigidity.  You could probably also use an acrylic sheet, which
> > would be less fragile if you're bouncing it around in a car like I do.
:)
>
> I have done it also this way and it is loosening in the middle. Best is to
> compress it between two glasses. You get only 1dB loss on the second glass
and
> the lens is much more rigid then.
>
> Clock
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