Illumination light field

With regard to the confinement and enhancement ability of a metallic nano-tip, we have proposed near-field Raman microscopy using a metallic nano-tip [9]. The metallic nano-tip is able to enhance not only the illuminating light but also the Raman scattered light [9, 15, 16]. Figure 2.5 illustrates our nano-Raman microscope that mainly comprises an inverted microscope for illumination and collection of Raman... 

Figure 2.5 A tip-enhanced near-field Raman microscope which we have developed. The microscope is based on AFM for control of the metallic nano-tip, an inverted optical microscope for illumination/collection of the light field and a polychromator for measurement of the Raman signal.

In order to adjust the dark-field illumination, project the illumination light onto a piece of paper placed on the microscopic stage or on the obj ective lens. Adjust the position of the slit and the height of condenser so that the transmission light illuminates the sample uniformly and brightly, and that the diameter of the shaded area produced on the surface of the objective lens is larger than that of the objective lens (see Fig 1C). 

Uses In tracer powder (P4) and in incendiary shells, also as casing of incendiary bombs.8 For pyrotechnic purposes for the production of dazzling white light and for use in colored fires, for signaling, and for illuminating landing fields, P2,3. 

The bit size of 50 nm was 10 times smaller than the wavelength of the illumination light. This was accomplished by the contribution of evanescent wave generated by the small particles. The results clearly show that the urethane-urea copolymer has a high enough resolution for the near-field recoding. 

Change to the fdter set specific for the green FITC fluorescence and take a 20-40-s exposure, under reduced incident light, of the corresponding adduct immunofluorescence. (Illuminate the field of view with excitation light only during the exposure period). 

We have modified a 1 kW Oriel xenon light source to provide an 8 inch illuminated circle with light between 300 and 1,000 nm to simulate sunlight for our prototype device. We have measured the light intensity distribution in the circle so that we can correct for effects of non-uniformity in the light field on the performance of photocatalysts. 

Section thickness approximately 12 pm Oblique illumination Transmitted, plane-polarized light Field dimensions = 0.14x0.14 mm... 

The depth of field defines the distance to the focal plane an object can have to still appear sharp. For example, in PIV/PIT measurements, particles that are not within the depth of field appear blurred and with a bigger diameter. The depth of field depends on the wavelength of the illuminating light, the optics, and the surrounding medium (e.g., air). 

Open the field diaphragm to illuminate the field of interest but minimize the amount of stray light The edges of the field diaphragm should remain just inside the field of view. 

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