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公开(公告)号：US20240356304A1
公开(公告)日：2024-10-24
申请号：US18733980
申请日：2024-06-05
发明人： Roman Koerner
CPC分类号： H01S5/3095 , H01S5/0262 , H01S5/0421 , H01S5/18327 , H01S5/1835
摘要： A VCSEL includes a vertical resonator structure that includes a first Bragg reflector, a second Bragg reflector, and an active region, and a laser diode structure that includes a p-doped first region and an n-doped second region arranged on two sides of the active region, respectively. The vertical resonator structure further includes a tunnel diode structure having a highly n-doped first semiconductor layer and a highly p-doped second semiconductor layer. The VCSEL further includes an electrical contact arrangement having a first metal contact and a second metal contact defining a current path so that, for a voltage applied to the contact arrangement that is a reverse voltage in relation to the laser diode structure and a forward voltage in relation to the tunnel diode structure, charge carriers are conducted away from the vertical resonator structure via the tunnel diode structure into the second metal contact.
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公开(公告)号：US20240332904A1
公开(公告)日：2024-10-03
申请号：US18661788
申请日：2024-05-13
IPC分类号： H01S5/183
CPC分类号： H01S5/18347 , H01S5/18327
摘要： A semiconductor component for emitting light, having a base body that has at least one mesa body with an emission region for light, the at least one mesa body being arranged on a surface of the base body and is assigned a first mirror portion, a second mirror portion, and an active layer arranged between the two mirror portions for generating the light, and having a contact unit for feeding electrical energy into the active layer, the contact unit having a joining portion for joining and/or for external contacting of the semiconductor component and an active contact portion that is arranged between the joining portion and the active layer, the at least one contact unit being arranged on a side of the base body opposite to the emission region, the joining portion at least partially covering the mesa-receiving body portion and a mesa-free body portion of the base body.
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公开(公告)号：US12034275B2
公开(公告)日：2024-07-09
申请号：US16919149
申请日：2020-07-02
CPC分类号： H01S5/18391 , H01S5/423 , H01S5/042
摘要： A laser arrangement includes a laser array including a plurality of Vertical Cavity Surface Emitting lasers and an optical structure including a diffuser arranged to change a distribution of the laser light. The optical structure is configured to transform the laser light to transformed laser light such that an overlap of the emission cones of at least a group of the plurality of lasers is increased in field-of-view in comparison to perfectly collimated laser light diffused to a flat-top intensity profile in the field-of-view. The optical structure is arranged to redirect the laser light emitted at angles of the emission cone to the field-of-view so as to increase the overlap of the emitted laser light in the field-of-view. The optical structure is also configured to provide a slope angle α of an intensity profile along a direction of the field-of-view that is smaller than a divergence angle of the laser.
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公开(公告)号：US20240128719A1
公开(公告)日：2024-04-18
申请号：US18397856
申请日：2023-12-27
CPC分类号： H01S5/18308 , H01S5/0217 , H01S5/18305 , H01S5/423 , H01S5/34
摘要： A method for producing a semiconductor component for emitting light includes providing a base body, the base body comprising an active layer for generating the light and a tunnel contact, and forming a stop structure by implantation in a region of the tunnel contact. The stop structure delimits the tunnel contact and serves to constrict a current introduced into the active layer. Defects due to crystal imperfections are generated by the implantation so that the implanted region is transparent for the light having an emitted wavelength.
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公开(公告)号：US11692925B2
公开(公告)日：2023-07-04
申请号：US16434195
申请日：2019-06-07
发明人： Johannes Hendrikus Maria Spruit , Alexander Marc Van Der Lee , Petrus Theodorus Jutte , Holger Joachim Moench , Joachim Wilhelm Hellmig , Roy Ovink
CPC分类号： G01N15/1434 , G01N15/06 , G01N2015/0046 , G01N2015/0693 , G01N2015/1075 , G01N2015/1454 , G01N2015/1486
摘要： A laser sensor module for detecting a particle density of small particles with a particle size between 0.05 μm and 10 μm includes a first laser configured to emit a first measurement beam, a second laser configured to emit a second measurement beam, and an optical arrangement configured to focus the first measurement beam to a first measurement volume and to focus the second measurement beam to a second measurement volume. The optical arrangement includes a first numerical aperture and a second numerical aperture arranged to detect a predetermined minimum particle size. The laser sensor module further includes a first detector configured to determine a first self-mixing interference signal of a first optical wave, a second detector configured to determine a second self-mixing interference signal of a second optical wave, and an evaluator.
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公开(公告)号：US20230019896A1
公开(公告)日：2023-01-19
申请号：US17952347
申请日：2022-09-26
发明人： Stephan Gronenborn
摘要： The present invention relates to an illumination device for a distance measurement camera, in particular a time of flight, TOF, camera system, a corresponding illumination method and a distance measurement camera system comprising said illumination device in order to improve distance measurements. The illumination device is configured to illuminate a particular region on an illumination plane with two different illumination profiles such as a first homogenous illumination profile and a second spot pattern illumination profile. The homogeneous illumination profile can enable a measurement with improved lateral resolution whereas the spot pattern illumination can enable a measurement with improved depth resolution.
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公开(公告)号：US11543273B2
公开(公告)日：2023-01-03
申请号：US16718545
申请日：2019-12-18
发明人： Alexander Van Der Lee , Robert Weiss , Hans Spruit
摘要： The invention relates to a method for determining the absolute value of the flow velocity (v) of a particle-transporting medium. At least two measurement laser beams (L_i) with linearly independent, non-orthogonal measurement directions (b_i) are emitted. The measurement laser beams (L_i) scattered at particles are detected and one measurement signal (m_i) is generated in each case for each measurement laser beam (L_i). The measurement signals (m_i) are evaluated, wherein absolute values of velocity components (v_i) are ascertained as projections of the flow velocity (v) on the respective measurement directions (b_i), wherein a solid angle region is ascertained for the prevalent direction of the flow velocity (v) and signs assigned to this solid angle region are chosen for the individual velocity components (v_i), and wherein the absolute value of the flow velocity (v) is determined using the ascertained absolute values of the velocity components (v_i) and using the chosen signs for the velocity components (v_i).
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8.发明申请公开(公告)号：US20220107077A1
公开(公告)日：2022-04-07
申请号：US17491650
申请日：2021-10-01
发明人： Stephan Gronenborn
摘要： A diffuser lens includes a first annular lens segment and a second annular lens segment. The first and the second lens segments are concentric. A refractive index of the first and second lens segments in a cross-section along a plane including an optical axis of the diffusor lens is described by a refractive index profile which varies in a direction perpendicular to the optical axis. The refractive index profile includes a first sub-profile, which describes the refractive index profile of the first lens segment, and a second sub-profile, which describes the refractive index profile of the second lens segment. The first sub-profile transitions to the second sub-profile at an interface. These first and second sub-profiles have slopes with opposite signs.
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公开(公告)号：US11217967B2
公开(公告)日：2022-01-04
申请号：US17148604
申请日：2021-01-14
摘要： A laser arrangement includes a laser array, and an optical arrangement. The laser array includes lasers in a first pattern emitting a same laser emission profile around a first optical axis with a divergence angle θ/2. The optical arrangement has a diffusor with an array of optical elements in a second pattern, with a second optical axis, and with an illumination pattern along a first illumination axis in a field-of-view if laser light is received within a defined range smaller than or equal to a range of angles between −/+θ with respect to the second optical axis. A row of lasers parallel to the first illumination axis has a pitch p. A row of m optical elements is parallel to the first axis. Each optical element has a diameter L, and contacts its neighbor. The n lasers and the m optical elements satisfy n*p=m*L with a deviation smaller than +/−5%.
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公开(公告)号：US20210399524A1
公开(公告)日：2021-12-23
申请号：US17344984
申请日：2021-06-11
发明人： Sven Bader , Ulrich Weichmann
摘要： A Vertical Cavity Surface Emitting Laser (VCSEL) includes a layer stack of semiconductor layers having a first layer sub-stack forming a mesa, and a second layer sub-stack adjacent to the mesa in a stacking direction. Layers of the second layer sub-stack extend beyond layers of the first sub-stack in a direction perpendicular to the stacking direction. The semiconductor layers of the layer stack form an optical resonator having a first mirror, a second mirror, an active region between the first and second mirrors for laser light generation, and an oxide aperture layer forming a current aperture. The oxide aperture layer is made from Al1-xGaxAs with 0≤x≤0.05. The oxide aperture layer is a last layer of the mesa and immediately adjacent to a first layer of the second layer sub-stack. A first layer of the second layer sub-stack is a contact layer.
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