Analysis of a spatially dispersive displacement sensor utilizing an AlGaInP chip

Ji Bin Horng, Jay Liao, Yao Jun Tsai, Yen Chen Huang, Chieh Hu, Seth Tsau, Yan Kuin Su, Wei Yang Chou

Research output: Contribution to journalArticlepeer-review


We present a demonstration and analysis of an industrialized design of a spatially dispersive displacement sensor, which is composed of an AlGaInP gain chip in visible range, optical assembly, and a spectrum analyzer. The sensor utilizes the spatial dispersion of focus from the optical assembly and wavelength spectrum's deviation induced by the displacement of the target. As a result, the sensor delivers a quick and simple way of measuring displacement. By adapting the magnification and resolution of the optical assembly, a displacement sensor with a middle measurement range, ∼10 μm, was obtained. However, we should note that 25 nm resolution is limited by the bandwidth and temperature fluctuation of the gain chip.

Original languageEnglish
Pages (from-to)6218-6222
Number of pages5
JournalApplied optics
Issue number24
Publication statusPublished - 2007 Aug 20

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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