Hello everyone,
1-How can I measure the FOV in angles?
2-How can I measure the FOR (Total FOV-Field of Regard) in angles?
Any help is welcomed
Solved
FOV measurement in angles
Best answer by Jeff.Wilde
Typically the FOV is defined by the user when setting up a conventional imaging system model. Vignetting may limit the field.
It’s not exactly clear what you application is, but I guess you simply want to know what angular range of rays make it through your prism. Is your model sequential or non-sequential (NSC)? If it’s NSC, then you can use a Source Ray and scan its angle at the input while using a Detector Rectangle to observe the output (in real space and/or angle space). Alternatively, you can you a Source Two-Angle and inject a cone of rays into the input, and again use the Detector Rectangle to look at what comes out.
+3Typically the FOV is defined by the user when setting up a conventional imaging system model. Vignetting may limit the field.
It’s not exactly clear what you application is, but I guess you simply want to know what angular range of rays make it through your prism. Is your model sequential or non-sequential (NSC)? If it’s NSC, then you can use a Source Ray and scan its angle at the input while using a Detector Rectangle to observe the output (in real space and/or angle space). Alternatively, you can you a Source Two-Angle and inject a cone of rays into the input, and again use the Detector Rectangle to look at what comes out.
Maybe your looking for quite simple answer. Just use the the OPERAND “RAID “or “RANG” with the right surface No you want to see the angle of the ray reflecting and you will get the readout in RAD or DEGREEs in the merit function. To see the max angles use the -1 and +1 at the parameter on rel. High.
Thank you for your helpful comments Klaus.Eckerl and Jeff.Wilde
I used mixed type mode in ZOS. My model is sequenial mode imported with a CAD file through NSC editor.
When I tried to read out Incidence Ray Angle using RAID operand, on the first surface I can make it. However, on the last suface (image surface) I can not see a readout from RAID operand. It gives error indicating “Error in target , Missed surface”.
What am I missing here? Can you help out?
+3Hey Onder,
I think that using mixed-mode is the right approach for this design. But there is a consequence in that if a ray does not exit the NS region, the sequential ray tracer has no way of knowing what happened to the ray, and hence it throws this error.
Make sure you set up the system aperture and field of view in such a way that every ray you trace into the NS entrance comes out of the NS exit port. I’d recommend ‘object-sided’ definitions of aperture and field as the easiest way to achieve this, and make sure that the exit port is large enough to pass all rays that enter the NS region.
- M
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）。