Abstract
A novel (to our knowledge) concept for a tunable birefringent filter with a high dynamic range is proposed and demonstrated by using a stack of liquid-crystal retarders having different thicknesses following an arithmetic sequence. Each retarder is between crossed polarizers with its optic axis oriented azimuthally at 45° to the polarizer axis. The tunable filter was fabricated by using nematic liquid crystals demonstrating tunability over a range of 800 nm, covering the visible and the near IR; hence it has a potential for use in biomedical optical imaging applications. © 2009 Optical Society of America
| Original language | English |
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| Pages (from-to) | 2114-2116 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 34 |
| Issue number | 14 |
| State | Published - 2009 |