Selection requires a trade-off between performance and cost based on specific needs.

What are the applications of BK7 domes?
Shield: protects the internal optics or sensor.
Optical window: window element in an optical system.
Sensor protection: protection of the sensor from environmental influences.
Laser systems: protective windows in laser systems.

What are the advantages and disadvantages of BK7 domes?
Advantages:
High transmittance, high optical uniformity, good mechanical properties, lower cost.

Disadvantages:
Lower UV transmittance, higher coefficient of thermal expansion.