FreeForm Optics (Make Complex Lenses)

While trying to figure out spherical aberration in lenses i wanted to see how rays exactly travel through lens. I wanted to make free form lenses to try to experiment with focus. I made this app to help myself first. I publish it on playstore to let other also do experiments.

NOTE:

App is experimental in behavior and only supports basic functionalities. Sometimes getting away from app might clear the whole work. This needs fix for future version by saving work temporarily.

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Info

This is optics app to dynamically create complex lenses and test how refraction happens.

NOTE(s):

- Freeform lenses don't have a fixed focus since surface cannot be easily described mathematically. Please don't expect focal length support!.

- In reality there is no fixed focal length of an optical object. Only highest dense focus is considered as focal length. This can easily be tested by creating a convex lens and increasing rays to 100+.

- This app is mostly suitable for research or innovative purposes. Can be very helpful in teaching optics.

- Red rays are inside medium. Green rays are result rays coming out from medium. Yellow rays are TIR (Total Internal Reflection) rays.

Features

- As the app name says it allows free forms of lenses. Just paint lenses like an artist.

- Supports standard lenses i.e. concave & convex lenses with editing option.

- Non freeform lenses are created using bezier curves.

Limitations:

App has some rules not knowing which can cause incorrect optics or loss of data.

- Rays start from left and reaches right end. No other direction is supported.

- Lenses when selected show rectangular bound. Bounds of lenses should NEVER overlap as it leads to bad optics.

- Currently nothing can be saved for reload. Always save result as image for reference. Active work loss due to app going background can happen.

- UNDO REDO is not available.

Quick Help:

- Set total rays using Rays button.

- Create lens using + button. - button to delete lens.

- Double tap on a lens to enter edit mode.

- EDIT MODE: Use Move button for movements.

- EDIT MODE: Use X, Y buttons to enable disable movement along respective AXIS.

- EDIT MODE: Use Edit to change shape of bezier lenses.

- Export image of optical setup.

More help is here:

http://www.gamesgreh.blogspot.com/2019/01/freeform-optics-android-app-help.html

DISCLAIMER:

This app doesn't guarantee to achieve optics of real laboratory. Focuses on making small lenses and combinations to make foundation of bigger work.