References are given as (p xxx) which refer to page xxx in the book "Micromechanics and MEMS"
The photograph below shows a jig bore machine modified by Robert Jebens to machine accurate grooves for alignment of telecommunication optical fibers. A single pole, double throw optical fiber switch was made that aligned one fiber to one of two output fibers with sub micron accuracy (p 237, R Jebens, W Trimmer, and J Walker). The white block at the bottom of the photograph is plastic. Slightly to the right and above the block is the diamond tip ready to machine a groove in the plastic.
The above jig bore was used with a high precision air bearing to machine
an insulating tube with a several millimeter inside diameter, and a two
micron wall thickness. The tube, coated with four gold electrodes,
is shown below. The tube is so fragile it undulates and crinkles
when not supported (p 327 W Trimmer & R Jebens).