unable to understand why I am unable to generate secondary reflections off M1 mirror. The first pass reflection seems to work on both M1 and M2.
How does Zemax decide how thick the mirror surface should be? The two mirrors have different thickness as shown below. Typically the designer would use Draw option to allocate a certain “thickness” to such surfaces.
This is why it is called sequential mode. OpticStudio launches a ray, looks for the intercept with the next surface in the Lens Data Editor (LDE), apply a refraction/reflection to determine the new direction of the ray, then look for the next surface… etc. Once the ray has interacted with a surface, this surface is not considered anymore.
@Mike.Jones is right that this might be a case for non-sequential mode. Although, you could still remain in sequential mode if you split your mirror into multiple surfaces (screenshot below, archive attached). But it might be hard to setup correctly if you intend to change the mirrors orientation (you’ll need to have pick-ups and make sure all the surfaces remain aligned with each others, out of scope of this answer).
This is why it is called sequential mode. OpticStudio launches a ray, looks for the intercept with the next surface in the Lens Data Editor (LDE), apply a refraction/reflection to determine the new direction of the ray, then look for the next surface… etc. Once the ray has interacted with a surface, this surface is not considered anymore.
@Mike.Jones is right that this might be a case for non-sequential mode. Although, you could still remain in sequential mode if you split your mirror into multiple surfaces (screenshot below, archive attached). But it might be hard to setup correctly if you intend to change the mirrors orientation (you’ll need to have pick-ups and make sure all the surfaces remain aligned with each others, out of scope of this answer).
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