Hi Suhwan,

Thanks for your question here!

Yes, it is possible to read the path of the rays from the ZRD files, and then to calculate the time-of-flight data using the speed of light. This knowledgebase article discusses in detail how to create a User Analysis using the ZOS-API to measure the time-of-flight of a LIDAR system:

How to create a Time-Of-Flight User Analysis using ZOS-API · MyZemax

If you have further questions, please do not hesitate to ask!

Best,

Csilla

Hi Suhwan,

Thanks for your follow up questions!

Regarding your first questions about selecting the rays only that have reached the detector, you can use filter strings for this selection. For example, you can use the filter string Hn to select the rays which hit the detector:

You may read more about the filter strings in the Help system at:

The Setup Tab > Editors Group (Setup Tab) > Non-sequential Component Editor > Non-sequential Overview > The Filter String

Regarding your second question, you will need to sum up the path length for all the segments in case of each ray. You may automate this process via the ZOS-API.

The following knowledgebase article and webinar will help you get started with processing the data from the ZRD files: 

Batch Processing of Ray Trace Data using ZOS-API in MATLAB or Python · MyZemax

Accessing the Ray Database with the ZOS-API using MATLAB - webinar · MyZemax

Best,

Csilla