beam profile sentence in Hindi
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- Also in the paraxial case it is much easier to use gold or copper mirrors or glass prisms to stack the spots on top of each other, and get a 5 x 5 mm beam profile.
- To prevent distortion of the beam profile, the glass should be of optical quality surface flatness of ? / 10 ( ? = 633 nm ) and scratch-dig of 40-20 or better.
- The signal-to-noise-ratio ( SNR ) of a pixel for a beam profile is defined as the mean value of the pixel divided by its root-mean-square ( rms ) value.
- The D4? width, unlike the FWHM and 1 / e 2 widths, is meaningful for multimodal marginal distributions that is, beam profiles with multiple peaks but requires careful subtraction of the baseline for accurate results.
- The TFL has several potential advantages compared to Ho : YAG laser for lithotripsy, including a four times lower ablation threshold, a near single-mode beam profile, and higher pulse rates, resulting in up to four times as fast ablation rates and faster procedural times.
- When a beam is measured with a laser beam profiler, the wings of the beam profile influence the D4? value more than the center of the profile since the wings are weighted by the square of its distance, " x " 2, from the center of the beam.
- Given a specific physical quantity, " G ( x, y, z ) ", from a pencil beam in Cartesian space and a collimated light source with beam profile " S ( x, y ) ", a broad-beam response can be calculated using the following 2-D convolution formula:
- Beam profilers measure the intensity, | E-field | 2, of the laser beam profile but do not yield any information about the imaginary parts of the electric field can be characterized using two CCD beam profilers that sample the beam at two separate propagation planes, with the application of a phase recovery algorithm to the captured data.
- The variable attenuator made in this fashion is not recommended for attenuation for beam profiling applications because : ( 1 ) the beam profile in the two orthogonal polarizations may be different, ( 2 ) the polarization beam cube may have a low optical damage threshold value, and ( 3 ) the beam can be distorded in cube polarizers at very high attenuation.
- The variable attenuator made in this fashion is not recommended for attenuation for beam profiling applications because : ( 1 ) the beam profile in the two orthogonal polarizations may be different, ( 2 ) the polarization beam cube may have a low optical damage threshold value, and ( 3 ) the beam can be distorded in cube polarizers at very high attenuation.
- The glass must be thick enough so that the beam does not overlap with itself to produce interference fringes, and if possible that the secondary reflection does not illuminate the active area of the CCD . The Fresnel reflection of a beam from a glass plate is different for the s-and p-polarizations ( s is parallel to the surface of the glass, and p is perpendicular to s ) and changes as a function of angle of incidence keep this in mind if you expect that the two polarizations have different beam profiles.
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