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Non-Sequential Mode Filament and LED in Simple Optical System [Issues]

Yadong.Wang

Dear ZEMAX Staff and fellow Zemaxers!

My question might be very silly/simple, but I have limited experience in non-sequential mode. I noticed this issue for few days, and I have tried all the tricks that I could think of. I guess it's now a good time to check with the experienced users. Maybe my struggles are quite straightforward to you.

I have this optical system that light from a filament source was collected by a condenser. After passing through the slit (I made using an Air gap nested in absorber). The beam will be reflected through prism mirror then travel upwards. 

Here is the issue: When I use the filament source even it emits randomly, the layout always captures/displays the beam that follows the optical axis of the system. However, when I changed the light source to a Cree LED that I created based on supplier datasheet. Even the beams are still random, but there is never a beam will follow the optical axis anymore. Please refer to the diagrams below...

 

I understand maybe the beam (based on the “layout rays” defined) may only show as an illustrative purpose. There is always beam passing the slit and going through the system. This I tested by placing the detectors in the system. But this issue still bothers me for few days. Can you please kindly help me?😅😅

I have zipped the source files below for your reference. Thank you!

F.Y.I I really appreciated Mark’s ZEMAX tutorials/resources on YouTube. Thank you. 

 

Best answer by David

I am not sure I understand your question, but . . .

I looked at both files. The major difference is that with the Cree simulation using a Source Radial, a good number of rays go through the slit. But with the Source Filament a very small number of rays go through the slit. This is accurately predicting that very little of the power is captured from the source.

If you mean that in the filament model you see a ray which appears to propagate down the optical axis, but you see no such ray is the Source Radial model, that is likely a coincidence. Non-sequential is not like sequential. In sequential you might generally expect a ray from an on axis field point through the center of the stop. In non-sequential, there is so particular reason either of these designs should produce an axial ray. If you want such a ray, you can explicitly create one using a Source Ray object in the Non-sequential Component Editor.

 

 

 

 

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Yadong.Wang
  • Yadong.Wang
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  • October 27, 2023

If anyone can help? or just drop your thoughts here? still waiting for some help...thanks

David
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  • David
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  • November 3, 2023

I am not sure I understand your question, but . . .

I looked at both files. The major difference is that with the Cree simulation using a Source Radial, a good number of rays go through the slit. But with the Source Filament a very small number of rays go through the slit. This is accurately predicting that very little of the power is captured from the source.

If you mean that in the filament model you see a ray which appears to propagate down the optical axis, but you see no such ray is the Source Radial model, that is likely a coincidence. Non-sequential is not like sequential. In sequential you might generally expect a ray from an on axis field point through the center of the stop. In non-sequential, there is so particular reason either of these designs should produce an axial ray. If you want such a ray, you can explicitly create one using a Source Ray object in the Non-sequential Component Editor.

 

 

 

 

Kind regards, David
Yadong.Wang
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