16 Mar 2026 BK7 is the most commonly used optical glass, and BK7 domes are a popular optical protection element suitable for protecting internal optics or sensors while providing good optical performance. 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. | 
