Abstract: An example forward scatter sensor comprises: a transmitter arranged to emit a single light sheet; a receiver to observe light scattered from particles that fall through a measurement volume; and a control entity comprising an analyzer arranged to record a measurement signal descriptive of intensity of light captured by the receiver as a function of time and to carry out a precipitation analysis on basis of a time segment of the measurement signal, the precipitation analysis comprising: identifying, in said time segment, one or more double peaks that each represent a respective droplet and comprise a first peak that represents light refracted from a bottom of the respective droplet upon entry to the measurement volume and a second peak that represents light reflected from a top of the respective droplet upon exit from the measurement volume; and deriving one or more precipitation parameters and one or more precipitation indications.

Abstract: An example forward scatter sensor comprises: a transmitter arranged to emit a single light sheet; a receiver to observe light scattered from particles that fall through a measurement volume; and a control entity comprising an analyzer arranged to record a measurement signal descriptive of intensity of light captured by the receiver as a function of time and to carry out a precipitation analysis on basis of a time segment of the measurement signal, the precipitation analysis comprising: identifying, in said time segment, one or more double peaks that each represent a respective droplet and comprise a first peak that represents light refracted from a bottom of the respective droplet upon entry to the measurement volume and a second peak that represents light reflected from a top of the respective droplet upon exit from the measurement volume; and deriving one or more precipitation parameters and one or more precipitation indications.

Abstract: An atmospheric cloud height, humidity profile, or temperature measuring method and arrangement are provided. In the method, pulsed laser signals (14) are transmitted through transmission optics (2, 3, 4, 5, 6) to the atmosphere and the signal (15) reflected or scattered back from there is detected. An interference filter (3) is used in the optics, in order to stabilize the transmitted optical power to the center wavelength of the interference filter (3).

Abstract: An atmospheric cloud height, humidity profile, or temperature measuring method and arrangement are provided. In the method, pulsed laser signals (14) are transmitted through transmission optics (2, 3, 4, 5, 6) to the atmosphere and the signal (15) reflected or scattered back from there is detected. An interference filter (3) is used in the optics, in order to stabilize the transmitted optical power to the centre wavelength of the interference filter (3).

Abstract: An apparatus including a first housing section having a first one-piece housing member; a second housing section having a second one-piece housing member; and a hinge rotatably connecting the first and second housing sections to each other. The hinge includes the first housing member forming a first hinge section at a first end of the first housing section which is pivotably connected to a second hinge section formed by the second housing member at a second end of the second housing member. The first and second hinge sections form opposite outer lateral ends of the hinge. The first and second hinge sections are spaced from outer lateral sides of the first and second housing sections. An axis of rotation of the hinge extends generally between the outer lateral sides.

Abstract: An apparatus including a first housing section having a first one-piece housing member; a second housing section having a second one-piece housing member; and a hinge rotatably connecting the first and second housing sections to each other. The hinge includes the first housing member forming a first hinge section at a first end of the first housing section which is pivotably connected to a second hinge section formed by the second housing member at a second end of the second housing member. The first and second hinge sections form opposite outer lateral ends of the hinge. The first and second hinge sections are spaced from outer lateral sides of the first and second housing sections. An axis of rotation of the hinge extends generally between the outer lateral sides.

Abstract: A lidar, which includes a transmitter and a receiver, as well as an optical system, which is arranged to direct at least part of the light sent by the transmitter as a transmitter beam progressing towards an object and to define the receiver beam to the receiver, at least part of the light arriving from the zone of which is focussed on the receiver. The optical system of the lidar is implemented in such a way that the beams immediately in front of the lidar are located essentially outside of each and one of the beams at least partially surrounds the other beam. The optical system includes an integrated optical, which has a first area for forming the transmitter beam, and a second area for forming the receiver beam.

Abstract: The invention relates to lidar, which includes a transmitter (1) and a receiver (2), as well as an optical system, which is arranged to direct at least part of the light sent by the transmitter (1) as a transmitter beam (3) progressing towards an object and to define the receiver beam (4) to the receiver (2), at least part of the light arriving from the zone of which is focussed on the receiver (2). The optical system of the lidar is implemented in such a way that the beams (3, 4) immediately in front of the lidar are located essentially outside of each and one of the beams (3, 4) at least partially surrounds the other beam (3, 4). According to the invention, the optical system includes an integrated optical component (6), which has a first area for forming the transmitter beam (3), and a second area for forming the receiver beam (4).