Q. What are the funcitons of dome covers?

A: Optical dome covers could not only protect the inner elements, but also be involved in the optical imaging. Its optical performance could influence the definition levels of the cameras. It is a part of precision components for cameras. 

Q. What is a good optical dome cover?

A:  A good dome cover is known by many factors. Among imaging quality is the most important of all, except that, transmission rate and ability of scratch-resistance are also important characteristics. A good dome cover needs fit the working envoirments to keep the normal working condition in various and complicated using environments. 

Q. What kind of materials are making dome covers generally?
What are their strength and weakness?

A:  The most commonly used materials are PMMA and PC to make the dome covers.

PMMA, its own high transmission rate reaches 92% and its scratch-resistance ability is better than PC, known as a high quality optical materials. PC, the transmission rate (88%) and scratch-resistance ability is not so excellent like PMMA, but which has outstanding impact resistance. Under normal temperature, 3mm thickness PC materials could stand the impact above IK10, belongs to excellent vandal-proof materials.