optics

Let tofu-optics users do this:

import tofu.optics.syntax.tupleN._

val lense = Tuple3._2[Int, String, Long]   // : Contains[(Int, String, Long), String]

tupleN object should contain all possible implicit extensions to Tuple{N} companion objects. Implementations should be macro generated.

OpticSim does not currently model reflection from metals properly. Adding support for complex indices of refraction to Glasscat and the various functions called by trace would address this problem. Would also require finding online sources of index data for metals, and adding them to the OpticSim GlassCat loader. Possible source of data here http://www.sspectra.com/sopra.html.

The library needs tests to prevent bugs. This library uses pytest as test suite, which is by far the most user friendly test-suite for Python. This is great, because this means anyone can add tests; it's super easy! Moreover, it makes you acquainted with the code, which is why it's labeled a good first issue.

When adding tests, keep the following in mind:

Only conics, spheres, and planes are supported right now for raytracing. All the other surface types (the polynomials module, plus the even asphere equation) need to be added as factory methods on the Surface type.

Describe the bug
If eps_r is shape (N,) then the fields solved are shape (N,1)

Either:

• disallow 1-D eps_r arrays
  Or:
• keep track of eps_r shape and reshape the fields to match.