We use fluorescent nanospheres as scalar detectors for the electric-field intensity in order to probe the near-field of an optical tip used in aperture-type near-field scanning optical microscopy (NSOM). Surprisingly, the recorded fluorescence images show two intensity lobes if the sphere diameter ...
Diffraction Limited’s line of high performance or “scientific grade” CCD and CMOS cameras are designed to operate under extremely low-light conditions with high sensitivity, low... Calibrating CMOS Images I’m often asked how CMOS Active Pixel Sensors differ from CCD sensors in terms of i...
The objective lens with finite aperture sizes at the entrance-pupil plane is used to image infinite distant targets, which are positioned at the front focal plane of an optical collimator and illuminated by an incoherent light source. A small region of diffraction-limited optical images, restricted...
Here \(\hbar c= 1.973\) keV Å is the Planck’s constant multiplied by the speed of light. Since all three locations have a finite size, and the energy channel has a finite width, the wavevector transfer of each diffraction pathway has a finite distribution around the mean. We apply ...
The light passing through a thin slit is sensed by a photo-electric detector and, in this way, the variations of the slit opening may be recorded immediately on the oscilloscope screen. The sensitivity of such displacement measurement is comparable with wavelenghts of light. Attention has been ...
In this investigation, a model-based deconvolution technique was developed to recover diffraction-limited images, where images with sizes smaller than the diffraction limit could be recognized. Experiments were carried out with a traditional microscope at 200× magnification coupled with a halogen light ...
to work up to creating holograms using chocolate, but along the way he’s found another interesting way to manipulate light. Using specialized diffraction gratings, a laser, and a few lines of code,he explores a unique way of projecting hologram-like imageson his path to the chocolate ...
An overlay error is determined using a diffraction based overlay target (202) by generating a number of narrow band illumination beams (108) that illuminate the overlay target (202) (152, 156). Each beam has a different range of wavelengths. Images (121) of the overlay 5 target (202) are...
Diffraction Limited’s line of high performance or “scientific grade” CCD and CMOS cameras are designed to operate under extremely low-light conditions with high sensitivity, low... Calibrating CMOS Images I’m often asked how CMOS Active Pixel Sensors differ from CCD sensors in terms of i...
In near-field scanning optical microscopy, a light source or detector with dimensions less than the wavelength (λ) is placed in close proximity (<λ/50) to a sample to generate images with resolution better than the diffraction limit. A near-field probe has been developed that yields a reso...