Hi,
I have a circular STL file with shapes in. I would like to use this as a mask in front of a simple telescope (I am using one of the example files (schmidt-cassesgrain.zmw)). I have entered a NSC surface and set the face to absorb, however, while the rays look correct on the 3D layout I cannot get the MTF or image simulation to work.
Any help or advice would be very helpful!
Best answer by Mark.Nicholson
You don’t say why they don’t work, so my guess is that the chief ray is being terminated by the mask and so is not available as a reference for these calculations.
If you can, try using the Slide surface to read a bitmap in, instead of the STL object. A slide object will put the ray intensity to zero if the ray is fully absorbed, but the zero-energy ray is still available to be traced and used as a reference by the diffraction calculations.
You could also try the Geometric MTF and Geometric Image Analysis calculations.
+3You don’t say why they don’t work, so my guess is that the chief ray is being terminated by the mask and so is not available as a reference for these calculations.
If you can, try using the Slide surface to read a bitmap in, instead of the STL object. A slide object will put the ray intensity to zero if the ray is fully absorbed, but the zero-energy ray is still available to be traced and used as a reference by the diffraction calculations.
You could also try the Geometric MTF and Geometric Image Analysis calculations.
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）。