When you are reading this post, when you are looking around, your eyes will automatically focus on the spot by reshaping our eye lens. With glass lenses as used in optics, you can achieve that only with moving a lens-system back and forward.
Optotune has introduced now a commercial tunable lens which reshapes its surface and allows continuously focusing between 20mm to 120mm by an external voltage. In the manual version you can even go from -40mm to 40mm, so from concave to convex!
This could find applications in material processing, ophthalmology or microscopy. For further applications have a look at their application homepage
Interesting is also the microscopy application:
Have fun!
Tuesday, December 27, 2011
Thursday, December 8, 2011
Wavelength Conversion Calculator
APE (standing for Angewandte Physik & Elektronik GmbH, a german company in Berlin) has a nice small (and free) wavelength converter on their homepage. It allows you to directly calculate the sum frequency and difference frequency generation, the wavelengths relations in an optical parameteric oscillator (OPO) as well as in coherent anti-stokes Raman scattering (CARS) spectroscopy. Furtermore, the conversion between wavelength, wavenumber, and frequency as well as different characterizations of pulses (dispersion) can be calculated.
The calculator page is in english and very userfriendly. Enjoy.
The calculator page is in english and very userfriendly. Enjoy.
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