Happy New Year! Hope everyone had a great holiday and is staying warm.
To continue addressing our FAQ's, another recurring question BMC recieves is on the flatness of our deformable mirrors. The figure below shows an unpowered BMC DM and a flattened BMC DM.
The surface figure of our unpowered deformable mirrors has a low-order surface bow. The amount of stroke needed to flatten the DM is between .5 µm and 1 µm, depending on the model. We can guarantee that the stroke needed to flatten the deformable mirror will not exceed this amount and tends to be lower for the lower stroke devices.
However, researchers in the past have been able to achieve flattening the wavefront without using up any stroke on the DM. If you are able to include additional optics into your setup, the low order bow can be taken out with static optics. Just something to keep in mind as you are designing your system and trying to determine how much stroke is required to achieve your wavefront correction needs.
If you have any additional questions in regards to the flatness of our mirrors or are interested in seeing what the typical unpowered surface figure is, please contact us at email@example.com or visit us online at www.bostonmicromachines.com