Close

Retrofit Attempt and Next Steps

A project log for Mica Sunglasses

Muscovite Optics

david-troetschelDavid Troetschel 06/25/2019 at 21:410 Comments

This post will meander quite a bit; I got back from my trip safely and have started working on this project again. I also started a new job at a local maker space, one of my job perks is the usage of their space.

The access to a shop again is rather good timing since I need to start producing prototypes, hopefully good looking prototypes.

My attention has been diverted by thinking about sales channels and the like too early as well, for now I plan to sell through boutiques, Tindie and.... that's it.

I'm working on a website for Wallfacer Design and likely the main page will just be a huge teaser for this project. Don't expect a typical website.

On the trip I brought along the mica and polarizers and offered them to several people. The reception was interesting, people are definitely interested in them as a novelty at the least but can see greater potential. One of the most difficult aspects I can see is that people want options. Right now there are essentially three lens configurations; mica, mica single polarized, mica double polarized. There are a couple ways to deal with this, but first lets consider finances. Right now I am only going to produce one design (in multiples.) After that batch has sold the money will be used to produce another design, in addition to the previous, and so on.

Now going back to the variety problem; since I have three configurations (for now) So when it comes to design there are multiple possible routes:

-Go with the most original or risky design, only one of them. (this would be casting metal around the mica, no polarized filters.)

-Make one design for factory setting, snap in lenses.

-Make one modular design, allow user swap of lenses and stacks. (this will have a more... utilitarian look likely. Although I am still a fan of the leaf spring design, just not near the eyes!)

From there I would probably make option specific designs with an option for custom orders as available.

To add to the fun, both polarization options have VLT visible light transmission as an option too. This value will have to be hand tuned for quite some time before equipment can be bought to verify production quality. (see previous post on $600 investment)

Either way, at this moment things are fairly conservative while I make some decisions.

My current thinking is that I make a 3D Print of a design with no holes drilled and the lenses filled in with dummy material at the desired thickness. From there I will make a urethane mold, I will have to be careful around the lenses since they will likely be swept and I need the parting line to match up. I'll probably just have to make a three part mold where I suspend the model, then tilt to the lens angle and pour, then inverse tilt to cast the other lens support then top off. From there I can pour in wax and then metal cast or I can just use resin to test. Extra note: the casting sprues should be located in the spring arm recess for current design as of this posting.

As an aside, I've noticed that nearly all lenses are swept AND curved. Mica... is flat FLAT!!!! Sooooo flat.

So I wonder what that will mean down the line.

-

I went to NYC with my partner to see Neal Stephenson a couple weeks ago, I looked for interesting forms for this project while there.

I somewhat impulsively chopped up part of a V5 sample to try and fit in an existing frame, turns out the recesses are very precise so... doesn't fit just right. I'm going to have to take rubbings of the existing lenses and try again. This should also highlight a future note to self, always print a copy of the lens outlines true to scale for self made designs. Sorry, no photos of the process so far.

And one from the motorcycle trip...

And as an attempt:


Download

old version.

Discussions