Re: making my own telescope type magnifiers?

On Tue, 08 Aug 2006 08:41:35 -0700, Eric R Snow <etpm@xxxxxxxxxxx>
wrote:

On 8 Aug 2006 08:17:23 -0700, stans4@xxxxxxxxxxx wrote:


Eric R Snow wrote:
I've been looking to buy head worn telescope type magnifiers because
the Opti-Visor and their ilk all bug my eyes. The optometrist said
this is because of two reasons in my case. First is that they don't
correct my astigmatism and second because the spacing of the lenses
doesn't match the spacing of my eyes. The least expensive of the head
worn magnifiers I have found so far is close to $400.00 US. And there
appears to be no upper limit in price. So, I'm thinking that by using
the Edmunds book "Popular Optics" for the math and design ideas, and
buying surplus coated lenses I can make my own. Any suggestions?
Thanks,
Eric R Snow

The ones I've seen for the handicapped used polycarbonate plates in
regular glasses frames that the lenses screwed into, probably had some
focussing built into them. Shouldn't be that hard to gen up, given the
availability of a spare frame or two.

You've got some other options, you could go with jeweler's loupes
mounted on glasses, which should fix your eye spacing problem, or one
of those large magnifier lights on a parallelogram fixture. Microscope
with a TV camera if you need more magnification.

As an aside, I've got severe astigmatism and have never had troubles
with my Opti-Visor, even with the supplementary lenses attached. Are
you expecting the Opti-Visor to correct your astigmatism without
glasses? I've always used mine with my glasses.

Stan
No Stan, I don't expect the magnifiers to correct the asigmatism. They
need to be mounted after the egeglass lenses. Maybe just splitting an
optivisor lens will work.
Eric

The advantage to the little telescopes is greater standoff distance. A
simple magnifier works simply by enabling you to focus with your face
closer to the work. With a 5X simple magnifier, your eye is about
2" from the work. A 5X binocular or telescope operates at longer
standoff distances up to infinity. The little headmounted binocs are
heavier than a simple opti-visor. They're great if you need the
standoff distance, like a dentist or surgeon might. If you can get
close to the work then the simple magnifier is lighter, much cheaper
and does the job.
.

Relevant Pages

  • Re: making my own telescope type magnifiers?
    ... the Opti-Visor and their ilk all bug my eyes. ... buying surplus coated lenses I can make my own. ... regular glasses frames that the lenses screwed into, ... with my Opti-Visor, even with the supplementary lenses attached. ...
    (rec.crafts.metalworking)
  • Re: making my own telescope type magnifiers?
    ... the Opti-Visor and their ilk all bug my eyes. ... buying surplus coated lenses I can make my own. ... regular glasses frames that the lenses screwed into, ... with my Opti-Visor, even with the supplementary lenses attached. ...
    (rec.crafts.metalworking)
  • Re: making my own telescope type magnifiers?
    ... the Opti-Visor and their ilk all bug my eyes. ... buying surplus coated lenses I can make my own. ... of those large magnifier lights on a parallelogram fixture. ... with my Opti-Visor, even with the supplementary lenses attached. ...
    (rec.crafts.metalworking)
  • Re: making my own telescope type magnifiers?
    ... the Opti-Visor and their ilk all bug my eyes. ... doesn't match the spacing of my eyes. ... can figure out the right optics for the eyepiece (your prescription plus ... whatever factors are needed for the input end of the magnifier) the ...
    (sci.engr.joining.welding)