microdiaphragm

plural microdiaphragms

1. A very small diaphragm.

   It depends on the operation of a microdiaphragm that moves up and down to push biofluids through a channel.

   2013, Kelvin K. L. Wong, Methods in Research and Development of Biomedical Devices, page VII

   2 more examples

   A microdiaphragm having an adjustable aperture between 0.5 and 1,000 μm comprising: a pair of separate diaphragm strips, each of said diaphragm strips comprising two plates, […]

   1989, Official Gazette of the United States Patent and Trademark Office, page 721

   An amplitude spatial frequency filter consisting of several transparent and opaque concentric rings and having a microdiaphragm in the center is placed in the frequency plane of the objective lens.

   1999, Oleg V. Angelsky, Steen G. Hanson, Peter P. Maksimyak, Use of Optical Correlation Techniques for Characterizing Scattering Objects and Media, page 180