Sentence examples for parallel to the optical beam from inspiring English sources

Since Doppler OCT measures only the velocity component parallel to the optical beam, the Doppler angle, i.e. the angle between flow direction and optical beam, must be determined from the retinal structure in order to calculate absolute flow velocities [ 27– 30].

For reconstruction, a collimated beam parallel to the optical axis is used to illuminate the hologram, so that the complex amplitude of the reconstructed image is obtained by simply carrying out Fresnel back propagation of the hologram to the image plane.

In the sample arm, both beams are aligned parallel to the optical axis with a defined lateral separation by reflection on a coated right angle prism (M).

A HeNe laser (633 nm; 25-LHP-991(230), Melles Griot, Carlsbad, CA) and a diode laser (488 nm; PC13589, Cyan Scientific, Spectra Physics, Santa Clara, CA) were directed into a TIRF objective (60× Plan Apo TIRF, NA 1.45; Nikon) mounted on an Eclipse TE2000-U microscope (Nikon) parallel to the optical axis and offset in order to achieve total internal reflection of the beam.

The imaging geometry associated with MEM is shown schematically in Fig. 1 where a converging electron beam of energy U passes through a grounded anode aperture A and emerges parallel to the optical axis z.

Birefringence is the difference between the refractive index parallel to the optical axis of the crystal and the refractive index perpendicular to the optical axis.

Unfortunately, most superficial vascular structures accessible by OCT happen to be arranged in flat vessel bed layers parallel to the surface and thus almost perpendicular to the optical beam (α~90°).

With the field parallel to the beam axis, the beams were straight and short.

Furthermore, Doppler OCT is only sensitive to blood flow that is parallel to the OCT beam.

The external field at the sample is oriented parallel to the γ beam.

The round particles may also be nanoworms with their long axes parallel to the electron beam.