+1Many LEDs are encapsulated in silicone. In regard to butt coupling light into a plastic light guide with similar index, my question: is it better to have a small air gap or not?
My most immediate issue with simulating this is that if I put the source (ideal Lambertian emitter) ‘Inside Of’ a silicone object, a larger fraction of the rays TIR inside… I’m guessing this needs a more sophisticated model, but I’m mostly looking for general advice. Any thoughts or guidance will be appreciated.
Best answer by Ethan
Hi
My first impression without further details is that you’d not want an air gap. TIR would be reduced if the index of the silicone object is in direct contact with the similar index plastic waveguide. You will get the most significant TIR with a silicone/air boundary. You’d also have two distinct boundaries for the rays to traverse before entering the waveguide.
Let me know if this suggestion helps.
Best,
Ethan
+2Hi
My first impression without further details is that you’d not want an air gap. TIR would be reduced if the index of the silicone object is in direct contact with the similar index plastic waveguide. You will get the most significant TIR with a silicone/air boundary. You’d also have two distinct boundaries for the rays to traverse before entering the waveguide.
Let me know if this suggestion helps.
Best,
Ethan
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
Do not provide any information or data that is restricted by applicable law, including by the People’s Republic of China’s Cybersecurity and Data Security Laws ( e.g., Important Data, National Core Data, etc.).
不要提供任何受适用法律，包括中华人民共和国的网络安全和数据安全法限制的信息或数据（如重要数据、国家核心数据等）。