## Calculations for angle of camera glass

Robbe Sea Wolf V2Posted by xilsoe Jul 11, 2012 20:44:22As I believe I stated in my previous post I was looking into some mathematics to calculate the angle of the glass that should go in front of the Tic-Tac box.

After some thinking I derived a formula: angle = atan( - (1,33 * sin( desired_angle )/(1 - 1,33 * cos( desired_angle )))

To make it easy to calculate more angles, I made a python function. Here are some calculations results:

Wanted deflection angle | Glass angle |
---|---|

5 deg | 6,65 deg |

10 deg | 13,3 deg |

15 deg | 19,95 deg |

20 deg | 26,6 deg |

25 deg | 33,25 deg |

30 deg | 39,9 deg |

35 deg | 46,55 deg |

40 deg | 53,2 deg |

45 deg | 59,85 deg |

50 deg | 66,5 deg |

55 deg | 73,15 deg |

60 deg | 79,8 deg |

65 deg | 86,45 deg |

70 deg | Not possible. Angle greater than 90 |

I may buy a Lazer to test the results above. One concern I have is whether the refraction will split the light into the different colours. Hopefully this will be negligible.

Anyway I'll try making a Tic-Tac box with angled glass and test it out to see if it works

PS: Note this will only work when the inside of the Tic-Tac box is dry and the angled glass on the Tic-Tac box is submerged in water!