Distance measuring device

摘要

An optical device is disclosed that may be employed in distance measuring devices. In at least one embodiment, the optical device includes a control unit that is adapted to cause at least one control signal generator unit to generate at least one control signal according to a predetermined temporal function on the basis of an elapsed time from a predetermined point in time. On the basis of the generated at least one control signal, at least one parameter of a receiver unit may be adjusted during the travel time of the optical pulse, wherein the at least one parameter affects the dynamic range of the receiver unit. In this way, the dynamic range of the receiver unit may be increased. A method is further disclosed for operating such an optical device, along with a distance measuring device including such an optical device and a surveying instrument including such a distance measuring device.

主权项

1. An optical device including:
an optical radiation source configured to emit optical pulses; a receiver configured to receive reflected optical pulses; a time-measuring unit configured to generate an elapsed time from a point in time related to emission of an optical pulse from the optical radiation source; at least one control signal generator unit configured to generate at least one control signal according to a temporal function on a basis of the elapsed time; and a control unit configured to adjust at least one parameter of said receiver affecting the dynamic range of said receiver based on the generated at least one control signal, wherein the temporal function is configured such that the temporal function at least partly includes a shape that is determined on a basis of parameters of an optical system of the optical device.