Lidar device
AssigneeRobert Bosch GmbH
InventorsAnnette Frederiksen, Stefan Spiessberger, Stefanie Hartmann
Life of this patent
Estimating the term…
Abstract
A LIDAR device is described including a beam source for emitting electromagnetic radiation in an emission path, in which at least one holographic optical element is situated for diffracting the emitted electromagnetic radiation, and a detector for detecting incident electromagnetic radiation in a reception path, an optical bandpass filter being connected upstream from the detector. Depending on a wavelength of the emitted electromagnetic radiation, the holographic optical element effectuates a diffraction by at least one angle of reflection which is matched to the shift of the wavelength of the incident electromagnetic radiation with the aid of the bandpass filter.
Claims4
A LIDAR device, comprising:
- a beam source configured to emit electromagnetic radiation in an emission path, in which at least one holographic optical element is situated for diffracting the emitted electromagnetic radiation;
- a detector configured to detect incident electromagnetic radiation in a reception path, an optical bandpass filter being connected upstream from the detector;
- and
- a second holographic optical element configured to deflect electromagnetic radiation emitted in the second predetermined wavelength range by a second angle of reflection;
- wherein, depending on a wavelength of the emitted electromagnetic radiation, the holographic optical element effectuates a diffraction by at least one angle of reflection which is matched to a shift of a wavelength of the incident electromagnetic radiation using the bandpass filter,
- wherein the LIDAR device includes at least one first holographic optical element which allows electromagnetic radiation emitted in a first predetermined wavelength range to pass undiffracted,
- wherein the first holographic optical element is configured to deflect electromagnetic radiation emitted in a second predetermined wavelength range by a first angle of reflection, and
- wherein the first angle of reflection and the second angle of reflection have opposite signs relative to a propagation direction of the electromagnetic radiation emitted in the second predetermined wavelength range.
A LIDAR device, comprising:
- a beam source configured to emit electromagnetic radiation in an emission path, in which at least one holographic optical element is situated for diffracting the emitted electromagnetic radiation;
- a detector configured to detect incident electromagnetic radiation in a reception path, an optical bandpass filter being connected upstream from the detector;
- and
- a second holographic optical element configured to deflect electromagnetic radiation emitted in the second predetermined wavelength range by a second angle of reflection;
- wherein, depending on a wavelength of the emitted electromagnetic radiation, the holographic optical element effectuates a diffraction by at least one angle of reflection which is matched to a shift of a wavelength of the incident electromagnetic radiation using the bandpass filter,
- wherein the LIDAR device includes at least one first holographic optical element which allows electromagnetic radiation emitted in a first predetermined wavelength range to pass undiffracted,
- wherein the first holographic optical element is configured to deflect electromagnetic radiation emitted in a second predetermined wavelength range by a first angle of reflection, and
- wherein the LIDAR device includes a third holographic optical element which is configured to deflect electromagnetic radiation emitted in a third predetermined wavelength range by a third angle of reflection.
Dependencies are inferred from the claim text.