Hello Everyone,
I’d like to simulate a 48mm diameter beam (30mm 1/e^2) that is collimated using the source ellipse in non sequential mode, but I'm having trouble getting the distribution to appear gaussian. I’m attempting to calculate Gx and Gy using 2/sin^2(theta) where theta is the divergence angle but the distribution appears more flat top than gaussian. Am I approaching the problem wrong? I’d like to continue to use source ellipse if possible since I have other models with various beam sizes all using source ellipse currently.
Page 1 / 1
Hi McGwire,
The Source Ellipse only sets a Gaussian distribution for the angular spread of the rays. This source has a spatial size, i.e., the launching surface. The position of the rays launched from this surface follows a uniform distribution. If you place a detector immediately after the source, the angular spread will be Gaussian but the positions will be like flat top.
For modelling a Gaussian beam, if you need a point source that emits rotationally symmetric Gaussian distribution of rays, then Source Gaussian offers a simple model.
Another option is Source Diode. It gives you more freedom on how to define the Gaussian distribution. With Source Diode, you can assign Gaussian distribution to both the spatial and angular distribution of the rays. You can also have different emission areas on x and y, and different x and y far field divergence.
Reply
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
Need more help?
To Chinese users:
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）。