Problem Sheet
... 4. Use Fermat’s principle to show that a thin lens with thickness given by w = w0 − αy 2 , where y is the distance from the axis, will focus paraxial rays from an object on the axis, and find the focal length as a function of α and the refractive index n. [Hint: the best way to interpret“paraxial” i ...
... 4. Use Fermat’s principle to show that a thin lens with thickness given by w = w0 − αy 2 , where y is the distance from the axis, will focus paraxial rays from an object on the axis, and find the focal length as a function of α and the refractive index n. [Hint: the best way to interpret“paraxial” i ...
INTERFERENCE
... Both of these involve splitting the light from a single source into two beams. Division of amplitude This involves splitting a single light beam into two beams, a reflected beam and a transmitted beam, at a surface between two media of different refractive index. ...
... Both of these involve splitting the light from a single source into two beams. Division of amplitude This involves splitting a single light beam into two beams, a reflected beam and a transmitted beam, at a surface between two media of different refractive index. ...
of optical-fiber dispersion
... zero-order nulled phase mask4 (see Fig. 1, bottom). The second exposure patterns a uniform (spatially periodic) refractive-index Bragg grating into the core of the waveguide. Although the grating is spatially periodic, its effective optical pitch is chirped because of the photoinduced index change p ...
... zero-order nulled phase mask4 (see Fig. 1, bottom). The second exposure patterns a uniform (spatially periodic) refractive-index Bragg grating into the core of the waveguide. Although the grating is spatially periodic, its effective optical pitch is chirped because of the photoinduced index change p ...
Equipment list: Description Supplier Model Optical test bench
... Materials: Ti3O5, TiO2, SiO2, HfO2, Ta2O5, Al2O3, ZrO2, SnO2, ITO, MgOTi3O5, TiO2, SiO2, HfO2, Ta2O5, Al2O3, ZrO2, SnO2, ITO, MgO Maximum substrate size: 4 inches in diameter ...
... Materials: Ti3O5, TiO2, SiO2, HfO2, Ta2O5, Al2O3, ZrO2, SnO2, ITO, MgOTi3O5, TiO2, SiO2, HfO2, Ta2O5, Al2O3, ZrO2, SnO2, ITO, MgO Maximum substrate size: 4 inches in diameter ...
Difficulties associated with working with UV and IR optics
... Reflective coatings are limited to wavelengths greater than 0.15 microns if they are to be broadband, though narrow bandwidth filters can be designed for lower wavelengths [1]. One of the difficulties associated with coating UV optics is that coatings are applied at high temperatures, so stress is i ...
... Reflective coatings are limited to wavelengths greater than 0.15 microns if they are to be broadband, though narrow bandwidth filters can be designed for lower wavelengths [1]. One of the difficulties associated with coating UV optics is that coatings are applied at high temperatures, so stress is i ...
Wavelength measurements using prism spectroscopy (Spk)
... errors), which have to be minimized by using complex lens constructions and special lens coatings. In nature, dispersion, occurring when light gets reflected and diffracted on water drops, leads to the appearance of rainbows. An alternative method for the determination of wavelengths of spectral lin ...
... errors), which have to be minimized by using complex lens constructions and special lens coatings. In nature, dispersion, occurring when light gets reflected and diffracted on water drops, leads to the appearance of rainbows. An alternative method for the determination of wavelengths of spectral lin ...
Graded-index fibers (GRA)
... Figure 5.11: 6 dB-Bandwidth of the transmitted electrical signal of a multi-mode graded index with numerical aperture AN = 0, 24 L0 is the fiber length to which the bandwidth B0 is related. This may be due to: 1. The refractive index profile is subject to fluctuations, that means fiber pieces altern ...
... Figure 5.11: 6 dB-Bandwidth of the transmitted electrical signal of a multi-mode graded index with numerical aperture AN = 0, 24 L0 is the fiber length to which the bandwidth B0 is related. This may be due to: 1. The refractive index profile is subject to fluctuations, that means fiber pieces altern ...
TIE-29: Refractive Index and Dispersion
... After melting the optical glass is cooled down at a high annealing rate. To control the refractive index during the melting process samples are taken directly from the melt after each casting. These samples are cooled down very fast together with a reference sample of the same glass. The reference s ...
... After melting the optical glass is cooled down at a high annealing rate. To control the refractive index during the melting process samples are taken directly from the melt after each casting. These samples are cooled down very fast together with a reference sample of the same glass. The reference s ...
absorbance, a - srmbiotech25
... – The absorbing medium must not scatter the radiation - no turbidity; – The incident radiation must consist of parallel rays, each traversing the same length in the absorbing medium; – The incident radiation should preferably be monochromatic, or have at least a width that is narrower than that of t ...
... – The absorbing medium must not scatter the radiation - no turbidity; – The incident radiation must consist of parallel rays, each traversing the same length in the absorbing medium; – The incident radiation should preferably be monochromatic, or have at least a width that is narrower than that of t ...
Dispersion staining
The optical properties of all liquid and solid materials change as a function of the wavelength of light used to measure them. This change as a function of wavelength is called the dispersion of the optical properties. The graph created by plotting the optical property of interest by the wavelength at which it is measured is called a dispersion curve.The dispersion staining is an analytical technique used in light microscopy that takes advantage of the differences in the dispersion curve of the refractive index of an unknown material relative to a standard material with a known dispersion curve to identify or characterize that unknown material. These differences become manifest as a color when the two dispersion curves intersect for some visible wavelength. This is an optical staining technique and requires no stains or dyes to produce the color. Its primary use today is in the conformation of the presence of asbestos in construction materials but it has many other applications.