Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A device for measuring the width of a piece of timber, such as a board and similar, which comprises a laser tube emitting a beam of laser radiation; a rotating mirror polyhedron positioned so as to receive said laser beam; optical means comprising a parabolic reflector so positioned that said mirror polyhedron is at the focal point of the reflector and that the reflector reflects the laser beam from the mirror polyhedron in a direction along said board; a plurality of mirror rasters positioned as mirror groups successively at desired intervals along the length of the board at a certain distance therefrom and at a suitable angle so as to reflect the laser beam coming from the parabolic reflector onto parts of the board that are situated stepwise in the lateral direction of the board; and a plurality of detectors including at least one detec-tor at each measuring point, as defined by said group of mirrors, and arranged to receive laser pulses reflected from the board surface, thus providing information about the board width at said measuring point.
Claim 2
Independent Claim
178 words
A device for measuring the width of a piece of timber, such as a board and similar, which comprises a laser tube emitting a beam of laser radiation; a rotating mirror polyhedron positioned so as to receive said laser beam; optical means comprising a parabolic reflector so positioned that said mirror polyhedron is at the focal point of the reflector and that the reflector reflects the laser beam from the mirror polyhedron in a direction along said board; a plurality of mirror rasters positioned as mirror groups successively at desired intervals along the length of the board at a certain distance therefrom and at a suitable angle so as to reflect the laser beam coming from the parabolic reflector onto parts of the board that are situated stepwise in the lateral direction of the board; and a plurality of detectors including at least one detec-tor at each measuring point, as defined by said group of mirrors, and arranged to receive laser pulses reflected from the board surface, thus providing information about the board width at said measuring point.
Claim 3
Dependent Claim
36 words
A device according to Claim 1, further comprising at least one detector at each measuring point for directly receiving a laser beam coming from one of said mirrors and passing by an edge of said board.
Claim 4
Dependent Claim
39 words
A device according to Claim 1, further comprising detector means positioned at the beginning and at midway of the parabolic reflector for distinguishing between two successive measurements and between the measurement information from the two sides of the board.
Claim 5
Dependent Claim
37 words
A device according to Claim 1, further comprising lens means positioned between the laser tube and the rotating mirror polyhedron and converting the circular cross section of the laser beam into a vertical rectangle or an ellipse.
Claim 6
Dependent Claim
19 words
A device according to Claim 1, wherein the reflector is replaced by a lens for producing a parallel scan.
Claim 7
Dependent Claim
36 words
A device according to Claim 1, wherein the impulses received by the detectors have, in a manner known per se, been arranged to be transferred to a computer, which calculates the optimal sawingwidth for the board.