Field-of-view optimization of magnetically actuated 2D gimballed scanners

Abstract

This work presents the field of view (FOV) maximization of a magnetically actuated two-dimensional (2D) gimballed scanner. The process of maximization is completed in two steps. (1) Optimization of the electrocoil providing the magnetic force that moves the scanner and (2) precise choice of optimum respective locations of both the scanner and the electrocoil. We first derived a formula relating the generated magnetic flux density, coil design parameters and driving voltage. Subsequently, we discussed the design trade-offs of an actuating electrocoil. We also conducted several experiments on a stainless steel 430 scanner having a footprint of 15 mm × 15 mm and a thickness of 460 µm. We determined the precise locations for the system components producing the maximum total optical scan angle (TOSA) hence the largest FOV. Finally, we proposed an empirically demonstrated formula, p(x1, y1) ≈ p(0.25Ls + 0.25Lm) , for the optimum electrocoil location with respect to the scanner by providing an offset ∆ x and ∆ y from the center to be able to successfully maximize the displacement and the related total optical scan angle of the system.

A Semi-Linear Elliptic Model for a Circular Membrane MEMS Device Considering the Effect of the Fringing Field

“…Since the aforementioned analytical solutions are unobtainable, suitable numerical procedures have to be selected, and it becomes imperative to evidence the pros and cons of each method [ 25 , 26 , 30 , 31 , 32 ]. MEMS is a rampant technology employed for realizing thermo-elastic systems [ 1 , 33 , 34 , 35 , 36 , 37 ], and it has a wide variety of applications ranging from biomedical engineering to microfluidics [ 38 , 39 , 40 , 41 , 42 ]. Moreover, many researchers are actively engaged in the development of important experimental research works for the development and prototyping of special MEMS such as, for example, circular graphene membrane MEMS devices [ 43 , 44 ], SiN circular membrane MEMS devices [ 45 , 46 ], and CMOS MEMS-based membrane-bridge devices [ 47 ] particularly useful for industrial applications.…”