GRIN-lens Imaging

GRIN-lens Imaging with FEMTO3D Atlas enables fast, high-resolution 3D monitoring of neural activity in deep brain regions during behavior, with access to depths of up to 8 mm.

About GRIN lens imaging

GRIN (Gradient Refractive Index) lens imaging enables optical access to deep brain regions by inserting a gradient lens that focuses light below the cortical surface. FEMTO3D Atlas microscopes integrate acousto-optic scanning with GRIN lenses to achieve fast (up to 100 kHz) 3D in vivo imaging through the implanted lens, even during behavior, without requiring further lens movement. This method allows stable, high-resolution observation of neural activity within volumes of ~200 × 200 × 230 µm, reaching depths of up to 8000 µm below the surface. In addition, GRIN lens imaging minimizes photodamage, preserving tissue integrity while providing clear visualization of deep brain structures.

Samples

GRIN-lens Imaging samples

Left
Right
Hippocampal measurement

Hippocampal measurement

Mouse prefrontal cortex imaging

Epileptic (A) and regular (B) activity patterns in the Hippocampus

Time series Z-stack with 920nm laser

Time series Z-stack with 1040nm laser