# entrance pupil

> optical image of the physical aperture stop

**Wikidata**: [Q359518](https://www.wikidata.org/wiki/Q359518)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Entrance_pupil)  
**Source**: https://4ort.xyz/entity/entrance-pupil


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)