The LFA-3404 Linear Focus Actuator is a
high performance compact positioning system. It was specifically
developed for optical applications requiring both high precision and
high-speed positioning over a short to medium stroke. The LFA-3404 is
well suited for optical focusing and other micropositioning
applications such as scanning interferometry, surface structure
analysis, disk drive testing, autofocus systems, confocal microscopy,
bio-technology, semiconductor test equipment. Note that this motor is
normally configured with an analog position feedback sensor and can be
optionally equipped with a digital quadrature feedback element. The
key to this products immense success is its novel tubular
architecture. This arrangement provides a means to send the optical
path directly through the middle of the motor. The moving optic
attached to the motors 'C-mount' is not cantilevered and so has no
torques. By design, the LFA-3404 Linear Focus Actuator rotates
approximately 0.1 degrees or 1.7 milliradians for every 1 millimeter of
translation. Product manufacturing tolerances are closely monitored so
that both lateral and angular displacements about the motion axis are
as small as possible.