# Abbe sine condition

> condition that must be fulfilled by a lens or other optical system in order for it to produce sharp images of off-axis as well as on-axis objects

**Wikidata**: [Q306243](https://www.wikidata.org/wiki/Q306243)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Abbe_sine_condition)  
**Source**: https://4ort.xyz/entity/abbe-sine-condition


## References

1. Freebase Data Dumps. 2013