Particulate sensor device

A particle sensor apparatus, comprising:

• an optical emitter device configured to emit an optical radiation within an emission spectrum of the optical emitter device so that a volume external to the apparatus or internal to the apparatus having at least one particle possibly present therein is illuminatable at least partly with the emitted optical radiation;
• an optical detector device having at least one detection surface, wherein the at least one detection surface is disposed so that at least a portion of the optical radiation emitted from the optical emitter device and at least partly scattered at the at least one particle strikes the at least one detection surface, and wherein the optical detector device is configured to output at least one information signal regarding at least one of an intensity and an intensity distribution of the optical radiation striking the at least one detection surface;
• an evaluation device with which, in consideration of the at least one information signal, an information item regarding a presence of particles, a number of particles, a particle density, and/or at least one property of particles is identifiable and outputtable;
• and
• at least one lens element disposed so that the emitted optical radiation is focusable by the at least one lens element onto a focus region inside the volume;
• wherein the emitted optical radiation is focusable by the at least one lens element onto the focus region inside the volume, the at least one lens element having a focus length of between 1 and 3 cm and/or a focus diameter of between 1 and 20 μm.

A particle sensor apparatus, comprising:

• an optical emitter device configured to emit an optical radiation within an emission spectrum of the optical emitter device so that a volume external to the apparatus or internal to the apparatus having at least one particle possibly present therein is illuminatable at least partly with the emitted optical radiation;
• an optical detector device having at least one detection surface, wherein the at least one detection surface is disposed so that at least a portion of the optical radiation emitted from the optical emitter device and at least partly scattered at the at least one particle strikes the at least one detection surface, and wherein the optical detector device is configured to output at least one information signal regarding at least one of an intensity and an intensity distribution of the optical radiation striking the at least one detection surface;
• an evaluation device with which, in consideration of the at least one information signal, an information item regarding a presence of particles, a number of particles, a particle density, and/or at least one property of particles is identifiable and outputtable;
• and
• at least one lens element disposed so that the emitted optical radiation is focusable by the at least one lens element onto a focus region inside the volume;
• wherein the optical emitter device and the optical detector device is embodied on and/or in one common chip.