A “Silicon Eye” Using Mems Micromirrors

MRS Bulletin ◽  
2001 ◽  
Vol 26 (4) ◽  
pp. 320-324 ◽  
Author(s):  
Natalie Clark
Keyword(s):  
Adaptive Optics ◽  
Air Force ◽  
Space Missions ◽  
Optical Systems ◽  
Satellite Systems ◽  
The U.S

The U.S. Air Force Research Laboratory's (AFRL) aggressive pursuit of reducing the size and weight of satellite systems for advanced space missions is providing a vital thrust to the development of “systemson-a-chip.” Adaptive optics technologies offer tremendous potential in reducing the weight and cost of space-based optical systems.

Hearing Conservation in the U.S. Air Force

2004 ◽  
Vol 10 (1) ◽  
pp. 25-27
Author(s):  
Jonathan Thomas ◽  
Gabriel Almario
Keyword(s):  
Air Force ◽  
Hearing Conservation ◽  
The U.S

The U.S. Air Force Transformation Flight Plan

2003 ◽  
Author(s):  
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Keyword(s):  
Air Force ◽  
Flight Plan ◽  
Force Transformation ◽  
The U.S

scholarly journals A micromirror array with annular partitioning for high-speed random-access axial focusing

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Nathan Tessema Ersumo ◽  
Cem Yalcin ◽  
Nick Antipa ◽  
Nicolas Pégard ◽  
Laura Waller ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Visual Information ◽  
High Speed ◽  
Random Access ◽  
General Purpose ◽  
Phase Shifting ◽  
Optical Systems ◽  
Piston Motion ◽  
Refresh Rate ◽  
Circular Symmetry

Abstract Dynamic axial focusing functionality has recently experienced widespread incorporation in microscopy, augmented/virtual reality (AR/VR), adaptive optics and material processing. However, the limitations of existing varifocal tools continue to beset the performance capabilities and operating overhead of the optical systems that mobilize such functionality. The varifocal tools that are the least burdensome to operate (e.g. liquid crystal, elastomeric or optofluidic lenses) suffer from low (≈100 Hz) refresh rates. Conversely, the fastest devices sacrifice either critical capabilities such as their dwelling capacity (e.g. acoustic gradient lenses or monolithic micromechanical mirrors) or low operating overhead (e.g. deformable mirrors). Here, we present a general-purpose random-access axial focusing device that bridges these previously conflicting features of high speed, dwelling capacity and lightweight drive by employing low-rigidity micromirrors that exploit the robustness of defocusing phase profiles. Geometrically, the device consists of an 8.2 mm diameter array of piston-motion and 48-μm-pitch micromirror pixels that provide 2π phase shifting for wavelengths shorter than 1100 nm with 10–90% settling in 64.8 μs (i.e., 15.44 kHz refresh rate). The pixels are electrically partitioned into 32 rings for a driving scheme that enables phase-wrapped operation with circular symmetry and requires <30 V per channel. Optical experiments demonstrated the array’s wide focusing range with a measured ability to target 29 distinct resolvable depth planes. Overall, the features of the proposed array offer the potential for compact, straightforward methods of tackling bottlenecked applications, including high-throughput single-cell targeting in neurobiology and the delivery of dense 3D visual information in AR/VR.

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