Haute Ecole d'Ingénierie

Schlieren laser Doppler flowmeter for the human optical nerve head with the flicker stimuli

Geiser, Martial ; Truffer, Frederic ; Evequoz, Hugo ; Khayi, Hafid ; Mottet, Benjamin ; Chiquet, Christophe

In: Journal of Biomedical Optics, 2013/18/12/127001/1-127001/5

We describe a device to measure blood perfusion for the human optic nerve head (ONH) based on laser Doppler flowmetry (LDF) with a flicker stimuli of the fovea region. This device is self-aligned for LDF measurements and includes near-infrared pupil observation, green illumination, and observation of the ONH. The optical system of the flowmeter is based on a Schlieren arrangement which collects...

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...