Patent ID: 8842260

Claim:
A laser distance measuring device comprising: a transmitter channel and a receiver channel, wherein said transmitter channel comprises a laser transmitter and an optical transmission system which together define a transmission axis, and said receiver channel comprises a receiver and an optical reception system which together define a reception axis, wherein said reception axis is aligned parallel to the transmission axis, and a printed circuit board which is opaque to the radiation of the laser transmitter, and upon which the laser transmitter and the receiver are mounted, wherein the laser transmitter and the optical transmission system are disposed on one surface of the printed circuit board, and the receiver and the optical reception system are disposed upon a surface of the printed circuit board on an opposite side of said one surface, wherein the printed circuit board is a dimensionally stable multilayer base printed circuit board, said base printed circuit board having solder points for attaching the laser transmitter and the receiver, the size of said solder points being larger than the alignment area necessary to align the laser transmitter and the receiver, and the laser transmitter and the receiver each being indirectly connected to the solder points by way of an adjoined printed circuit board, while each of the adjoined printed circuit boards is fitted, respectively, with the laser transmitter and the receiver and the laser transmitter is mounted on an adjoined printed circuit board and the receiver is mounted on a second adjoined printed circuit board, said transmission axis and said reception axis being oriented perpendicular to a main plane of said adjoined printed circuit board, said adjoined printed circuit board being oriented perpendicular to the base printed circuit board, and the adjoined printed circuit board and the base printed circuit board being connected via the solder points and wherein the base circuit board comprises a plurality of alternating electrically nonconductive and electrically conductive layers, with at least one of the electrically conductive layers being a full-surface inner copper layer which serves as optical and electrical shielding layer, wherein the surfaces of the base printed circuit board comprise at least one free area wherein said free area is coated with a copper layer which acts as a heat sink and which is connected with the inner full-surface copper layer, and wherein the optical transmission system and the optical reception system have a planar phase along their circumference, for connecting the optical transmission system and the optical reception system to the base printed circuit board.