A kilohertz scanning optical delay line is demonstrated by means of employing a prism array formed by identical wedge prisms. The wedge prisms are lined up with one another and uniformly disposed on a rotational wheel. The optical path length of a light beam can thus be scanned as the prisms pass through the beam periodically. Scanning rate of 2 kHz, scanning amplitude of 3.5 mm, linearity of 99%, and duty cycle of 95% can be achieved simultaneously. Simplicity and rigidity are embedded in the design. Preliminary test results are presented.
© 2001 Optical Society of America
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(120.5800) Instrumentation, measurement, and metrology : Scanners
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(230.4110) Optical devices : Modulators
Ming Lai, "Kilohertz Scanning Optical Delay Line Employing a Prism Array," Appl. Opt. 40, 6334-6336 (2001)