Université de Neuchâtel

Comparing glass and plastic refractive microlenses fabricated with different technologies

Ottevaere, H. ; Cox, R. ; Herzig, Hans-Peter ; Miyashita, T. ; Naessens, K. ; Taghizadeh, M. ; Völkel, R. ; Woo, H. J. ; Thienpont, H.

In: Journal of Optics A: Pure and Applied Optics, 2006, vol. 8, no. 7, p. 407-429

We review the most important fabrication techniques for glass and plastic refractive microlenses and we quantitatively characterize in a systematic way the corresponding state-of-the-art microlenses, which we obtained from selected research groups. For all our measurements we rely on three optical instruments: a non-contact optical profiler, a transmission Mach–Zehnder interferometer and a...

Université de Neuchâtel

Microlens systems for fluorescence detection in chemical microsystems

Roulet, Jean-Christophe ; Völkel, Reinhard ; Herzig, Hans-Peter ; Verpoorte, Elisabeth ; de Rooij, Nicolaas F. ; Dändliker, René

In: Optical Engineering, 2001, vol. 40, no. 5, p. 814-821

Micro-optical systems based on refractive microlenses are investigated. These systems are integrated on a chemical chip. They focus an excitation beam into the detection volume (microliter or even submicroliter scale) and collect the emitted light from fluorescent molecules. The fluorescence must be carefully separated by spatial and spectral filtering from the excitation. This paper presents the...