Date: Tue, 7 Feb 2012 20:07:09 -
Subject: Re: Model Eye Lenses
Sargent Welch does carry some 38 mm diameter lenses.
---- Stan Dodds wrote:
> We do a model eye experiment using normal ophthalmic lenses, obtained
> from a local optical supply wholesaler. (Same as used in eyeglasses.)
> Standard ones are 70 mm diameter and go up to about 6 diopter. They
> are plastic meniscus lenses which could be cut down for your
> apparatus, perhaps by the supply house.
> The Cenco lenses seem more typical of 'scientific' usage in size and
> strength, so you could try Edmund Industrial Optics or Surplus Shed,
> in addition to the usual science suppliers. You may have some
> difficulty finding 38 mm diameter (actually 1.5 inch, probably),
> because 25 and 50 mm are now more common.
> On Feb 7, 2012, at 4:01 PM, Roger Key wrote:
> > Hello,
> > I'm asking for the help of the experts out there finding replacement
> > lenses for the old Cenco model eye sets - the manual for the set we
> > use is at:
> > http://www.sargentwelch.com/pdf/opinstr/87660.pdf
> > (bottom of page 8 shows a view - if you've used these you'll know)
> > We'd like to buy some 0.5, 1.0 and 1.5 diopter replacement lenses,
> > and maybe a +7 and a +20 to have as spares .. but I'm struggling to
> > find a vendor.
> > Does anyone know where to find those?
> > Do the lenses from the new Pasco eye lab apparatus fit the old cenco
> > eyes?
> > Thanks in advance,
> > Roger Key
> > CSU Fresno Physics
> > 559-278-2728
> > http://Physics.CSUFresno.edu
> > http://www.Twitter.com/FresnoStPhysics
> > http://www.YouTube.com/FresnoStPhysics