Patent ID: 11945234
Assignee: HOCHSCHULE FüR ANGEWANDTE WISSENSCHAFTEN MüNCHEN
Field: Measurement (Instruments)
Classification: CPC B  G  C | IPC B  C

Claim 14:
15. A device for transferring objects onto a substrate, the device comprising:
a reservoir for holding a medium containing objects;
a substrate holder configured to hold the substrate having an acceptor surface such that the acceptor surface faces an opening of the reservoir;
a laser source configured to emit laser pulses;
a control unit for generating a first laser pulse or first laser pulse train from the laser source; and
an objective for focusing the first laser pulse or first laser pulse train onto a focus of the first laser pulse or first laser pulse train;
wherein:
the control unit comprises an imaging module configured to determine a position of at least one of the objects in the medium at least in part by determining at least two spatial coordinates of the position of the at least one object;
the control unit is configured to determine a first target focus point relative to the position of the at least one object;
the control unit comprises a focusing module configured to align the focus of the first laser pulse or first laser pulse train to the first target focus point;
a center wavelength of the first laser pulse or first laser pulse train is larger than 500 nm; and
a pulse intensity at the first target focus point and a pulse duration of the first laser pulse or first laser pulse train are sufficiently large such that the first laser pulse or first laser pulse train generates a droplet of the medium that is ejected from the medium towards the acceptor surface.