Kaer Labs designs and sells optical in vivoand ex vivo optical imaging systems for biomedical research. Our systems are used by academic and private laboratories to develop molecules for image guided surgery, or to study cancer, infectious diseases or vascularization. With the Kaer Imaging System for in vivo near infrared fluorescence – NIR-I and NIR-II -, we give to laboratories the access to a new flexibility with an open design. We also propose an imaging solution based on serial block face imaging or cryofluorescence tomography, for the high resolution 3D visualisation of thick samples, with or without fluorescent labeling.