Measurement of the position and displacement of a light beam with a spiral scanner.
A rotating spiral scanner interrupts an incident light beam for time intervals which are proportional to the position of the beam. This produces an electrical signal via a photodetector system which is independent of beam intensity. The device was used to measure the relative change in sarcomere spacing during the initial development of tension in a contracting frog sartorius muscle.
Ahlborn
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Departments of Physics, Engineering Physics, and Anatomy, The University of British Columbia, Vancouver, B. C., Canada.
Dean
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Bressler
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