I am trying to simulate an optical illumination system.
Description:
The main source is LED, light from it is carried out by a Multimode optical fiber cable whose end is fixed into a focusing light tube.
This focusing light tube provides complete TIR to light entered into it and then focusses it into a circular spot using a plano-convex lens.
Problem caused:
I have set up the system in Zemax with all the specifications I have but, facing problems with focusing the light into a spot at the required working distance.
The required working distance is 150mm from the position of a convex lens which is also inside a focusing light tube.
My idea was to initially simulate the existing system and then replace the existing plano-convex lens with a smaller lens and adjust the system such that I can get the same spot size as the existing system.
please give me your suggestions on how I can proceed further to obtain a circular spot with the existing simulation, as I attached the simulation file below.
Kindly suggest to me any lenses or prisms that can bend the light entered into them by 10-14 degrees.
I have attached the file below please review it and provide your suggestions.
Thanks in advance.
Best answer by Ethan
Hi @Suguna,
This sounds like an interesting project! The file that you shared is only a ZDA file. For us to see your design, you need to share a ZMX, ZOS, or ZAR file. Without reviewing the design, I’ll just make some general comments/suggestions:
You can use the OpticStudio optimization tools to create optimized surfaces that fit your specific design requirements, a compact system with a circular spot and specific working distance. For more information to get started, please see this Knowledgebase article: How to optimize non-sequential optical systems – Knowledgebase (zemax.com).
If you are having trouble designing the lens, you can consider first creating a design in Sequential Mode. Of course, you won’t be able to simulate all the complexity of the multi-modal fiber interacting with a light tube, but it could give you a place to start. In Sequential Mode, it will be very straightforward to study working distance and spot shape/size. Then you can port that design back to Non-Sequential and further modify as necessary.
It’s difficult to give you an exact lens recommendation, but using Sequential mode, there are many tools for optimizing the surfaces (or even creating a group of surfaces) that will get you closer to the intended design. Check out this Knowledgebase article: How to design a singlet lens, Part 3: Optimization – Knowledgebase (zemax.com)
This sounds like an interesting project! The file that you shared is only a ZDA file. For us to see your design, you need to share a ZMX, ZOS, or ZAR file. Without reviewing the design, I’ll just make some general comments/suggestions:
You can use the OpticStudio optimization tools to create optimized surfaces that fit your specific design requirements, a compact system with a circular spot and specific working distance. For more information to get started, please see this Knowledgebase article: How to optimize non-sequential optical systems – Knowledgebase (zemax.com).
If you are having trouble designing the lens, you can consider first creating a design in Sequential Mode. Of course, you won’t be able to simulate all the complexity of the multi-modal fiber interacting with a light tube, but it could give you a place to start. In Sequential Mode, it will be very straightforward to study working distance and spot shape/size. Then you can port that design back to Non-Sequential and further modify as necessary.
It’s difficult to give you an exact lens recommendation, but using Sequential mode, there are many tools for optimizing the surfaces (or even creating a group of surfaces) that will get you closer to the intended design. Check out this Knowledgebase article: How to design a singlet lens, Part 3: Optimization – Knowledgebase (zemax.com)
