公开(公告)号：EP3796032A1

公开(公告)日：2021-03-24

申请号：EP19216306.1

申请日：2019-12-13

Applicant: ROSEMOUNT AEROSPACE INC.

Inventor： Ramthun, Kent Allan

IPC: G01S7/481 ,  G01B11/25 ,  G02B3/06 ,  G02B3/08

Abstract: An optical system includes an illumination source (102). A lens (104) is optically coupled to the illumination source for projecting a line image (106). The lens conforms to a curved profile, and the lens is a Fresnel lens. A method of projecting a line image includes generating illumination from an illumination source. The method includes focusing the illumination through a lens to form a line image, wherein the lens is as described above.

公开(公告)号：EP4166926A1

公开(公告)日：2023-04-19

申请号：EP22201447.4

申请日：2022-10-13

Applicant: ROSEMOUNT AEROSPACE INC.

Inventor： ANDERSON, Kaare Josef ,  RAY, Mark ,  Ramthun, Kent Allan

IPC: G01N15/02 ,  B64D15/20 ,  G01S17/95 ,  G01N15/00 ,  G01N15/06

Abstract: A method of operating an optical icing conditions sensor includes transmitting a first light beam with a first transmitter (16) and a second light beam with a second transmitter (18), thereby illuminating two illumination volumes. A first receiver (20) receives the first light beam. A second receiver (22) receives the second light beam. A controller (100) measures the intensity of light received by the first and second receivers. The controller compares the intensities to threshold values and determines if either intensity is greater than the threshold values. The controller determines a cloud is present if either intensity is greater than the threshold values. The controller calculates a ratio of the intensities if a cloud is present. The controller determines, using the ratio, whether the cloud contains liquid water droplets, ice crystals, or a mixture of liquid water droplets and ice crystals.

公开(公告)号：EP3726245A1

公开(公告)日：2020-10-21

申请号：EP19216017.4

申请日：2019-12-13

Applicant: ROSEMOUNT AEROSPACE INC.

Inventor： Ramthun, Kent Allan ,  Zhang, Weibin

IPC: G01S7/484 ,  G01S17/89 ,  G01S17/933

Abstract: Apparatus and associated methods relate to an array of independently-controllable laser diode bars 44A - 44Z configured to scan a linearly-structured beam of light upon a scene. Each of the independently-controllable laser diode bars is distributed along a common axis. Each of the independently-controllable laser diode bars is configured to emit a beam of light in an emission direction D E orthogonal to the common axis. Each of the independently-controllable laser diode bars can be energized in a sequence, thereby scanning the scene in the direction of the common axis. Linear projector 22C has thus electronic scanning capability. Linear projector 22C includes an array of laser diode bar 72 that includes rows of laser diodes 44A - 44Z. Each of the laser diodes in a particular row 44A - 44Z is aligned along a fast-axis direction with the other laser diodes in that particular row 44A - 44Z. Each of the laser diode rows 44A - 44Z can be independently energized in turn. In the depicted embodiment laser diode row 44N is energized. Each of the laser diode rows 44A - 44Z are configured to generate a linear beam 32C of light that is collimated and/or focused by cylindrical lenses 45A - 45N, 46 and 50 in a fast-axis direction D FA . The linear beam emitted by each row of laser diodes 44A - 44Z is then diverged in a slow axis direction DSA, by cylindrical lens 48. For example, the laser diode rows 44A - 44Z can be energized in a sequence from top row 44A to bottom row 44Z, so as to generate a corresponding sequence of linear beams focused at different angles of elevation with respect to linear projector 22C.