Apparatus for measuring an environment by means of time-of-flight measurement of laser beams (4 i) reflected thereon, in particular pulsed laser beams, comprising: a beam deflection device having at least one mirror surface (18 - 25) which can rotate or pivot about an axis of rotation that is non-normal to the mirror surface, which beam deflection device has a mirror prism whose prism shell sides each form one mirror surface (18 - 25) and whose prism axis is the axis of rotation, a first laser transmitter (11 1) configured to transmit a first transmission laser beam (8 1) via the beam deflection device into a first time-dependent transmission direction (30 1), and a first laser receiver (14 1) configured to receive the first transmission laser beam (8 i) reflected by the environment and received back via the beam deflection device in a first time-dependent reception direction (31 1) as a first reception laser beam, wherein the first transmission and reception directions (30 1, 31 1) lie parallel to one another and in a first angle (α 1) with respect to axis of rotation at the respective transmission and reception times of the transmission and reception laser beams (8 i, 9 i), further comprising a second laser transmitter (11 2) configured to transmit a second transmission laser beam (8 2) via the beam deflection device into a second time-dependent transmission direction (30 2), and a second laser receiver (14 2) configured to receive the second transmission laser beam (8 2) reflected by the environment and received back via the beam deflection device in a second time-dependent reception direction (31 2) as a second reception laser beam (9 2), wherein the second transmission and reception directions (30 2, 31 2) lie parallel to one another and in a second angle (α 2) with respect to the axis of rotation at the respective transmission and reception times of the transmission and reception laser beams (8 i, 9 i), and wherein the first laser receiver (14 1) is spaced apart from the first laser transmitter (11 1) and the second laser receiver (14 2) is spaced apart from the second laser transmitter (11 2), each in direction of the axis of rotation. a beam deflection device having at least one mirror surface (18 - 25) which can rotate or pivot about an axis of rotation that is non-normal to the mirror surface, which beam deflection device has a mirror prism whose prism shell sides each form one mirror surface (18 - 25) and whose prism axis is the axis of rotation, a first laser transmitter (11 1) configured to transmit a first transmission laser beam (8 1) via the beam deflection device into a first time-dependent transmission direction (30 1), and a first laser receiver (14 1) configured to receive the first transmission laser beam (8 i) reflected by the environment and received back via the beam deflection device in a first time-dependent reception direction (31 1) as a first reception laser beam, wherein the first transmission and reception directions (30 1, 31 1) lie parallel to one another and in a first angle (α 1) with respect to axis of rotation at the respective transmission and reception times of the transmission and reception laser beams (8 i, 9 i), further comprising a second laser transmitter (11 2) configured to transmit a second transmission laser beam (8 2) via the beam deflection device into a second time-dependent transmission direction (30 2), and a second laser receiver (14 2) configured to receive the second transmission laser beam (8 2) reflected by the environment and received back via the beam deflection device in a second time-dependent reception direction (31 2) as a second reception laser beam (9 2), wherein the second transmission and reception directions (30 2, 31 2) lie parallel to one another and in a second angle (α 2) with respect to the axis of rotation at the respective transmission and reception times of the transmission and reception laser beams (8 i, 9 i), and wherein the first laser receiver (14 1) is spaced apart from the first laser transmitter (11 1) and the second laser receiver (14 2) is spaced apart from the second laser transmitter (11 2), each in direction of the axis of rotation.