The entry lens focuses light into the delivery fiber. Due to its rotational symmetry, the delivery fiber quickly averages the azimuthal angles of individual rays inside the fiber. with respect to the point of impact; Aligning, aiming or focusing the laser beamShaping the laser beam, e.g. The standard way to describe the BPP is to measure the beam waist radius in which 86% (1/e²) of the radiation falls and the divergence angle (half angle) measured with the same 86% values. The angle-to-offset lens, herein termed âexit lensâ, has a very short focal length, for example 10 mm or less, more preferably 1 mm or less.
As a rule of thumb we normally use a factor 1.5 as the relation between the 86% (1/e²) and 98% BPP value.A different and very common beam quality measurement is the M² value. with respect to the point of impact; Aligning, aiming or focusing the laser beamShaping the laser beam, e.g. It is the product of a laser beam's far-field divergence angle (half-angle) and the radius of the beam at its narrowest point (the beam waist). PREVIOUSLY RECORDED ON REEL 029563 FRAME 0661. Optoskand calculations are based on the BPP measured at the 98% values, both regarding beam waist and angle.The lower beam parameter product - the better beam quality.The relation between the two BPP values is depending on the beam profile. The Beam Parameter Product (BPP) quantifies the quality of a laser beam and how well it can be focused to a small spot. Revolutionary Variable Beam Parameter Product (V-BPP) technology better controls the laser beam for superior cut performance PROCESS: 2D, FLYING OPTICS MACHINE DESCRIPTION. The quality of the laser beam is largely determined by two factors:These factors are largely influenced by two separate factors, which can be managed as needed.Beam parameter product (BPP) is the value that defines the influence of a lens on the spread and convergence of the laser beam. FLAME CUTTING; WORKING BY LASER BEAMWorking by laser beam, e.g. measuring or observing methods especially used thereforActive alignment, i.e. Lasers are presently used for cutting, drilling, welding, brazing, surface annealing, alloying, hardening, and other applications. On the contrary, the present teachings encompass various alternatives, modifications and equivalents, as will be appreciated by those of skill in the art.A typical step-index fiber always delivers a beam of roughly the same spot size at the output end of the fiber, because the beam is confined by the perimeter of the step-index core. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNORS: MARTIN H. MUENDEL AND DAHV KLINER ASSIGNEES: JDS UNIPHASE CORPORATION AND AMADA CO., LTD;ASSIGNORS:MUENDEL, MARTIN H.;KLINER, DAHV;SIGNING DATES FROM 20121212 TO 20121221;REEL/FRAME:029626/0565CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR AMADA CO., LTD. This means that higher outputs and higher convergences will create higher intensities.Laser beams, which allow for wide control of the output, can also be used in Copyright (C) 2020 KEYENCE CORPORATION.
Beam-parameter product. As a result, the output divergence is substantially rotationally symmetrical. By way of example, the outer diameter of the glass cladding part of process waveguides can be 250 micrometers or greater, often 400 micrometers or greater, and the core diameter can be 200 micrometers or less, often 100 micrometers or 50 micrometers or less. By Michael Scaggs. Units of measurement for BPP are mm-mrad:
in U.S. Pat. ASSIGNOR(S) HEREBY CONFIRMS THE PATENT NUMBERS 7,868,247 AND 6,476,312 WERE LISTED IN ERROR AND SHOULD BE REMOVED;ASSIGNOR:JDS UNIPHASE CORPORATION;REEL/FRAME:037562/0513CORRECTIVE ASSIGNMENT TO CORRECT INCORRECT PATENTS 7,868,247 AND 6,476,312 ON PAGE A-A33 PREVIOUSLY RECORDED ON REEL 036420 FRAME 0340.
The size of the spot depends almost linearly on the divergence, which can be varied by varying an input convergence angle of the laser beam focused onto the fiber tip, to vary the spot size.Instead of (or in addition to) varying the input convergence angle, a launch angle into the delivery fiber can be varied. PREVIOUSLY RECORDED ON REEL 029563 FRAME 0661.
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