Lectures 18-20: Diffraction
... where the wave at the center of the aperture is represented by Eo ei kzo -wt and the phase shift of each element of length with respect to that central plane wave is given by e-i kxj sinJ . But we know from integral calculus what to do with this sort of thing when we see it: We take the limit as the ...
... where the wave at the center of the aperture is represented by Eo ei kzo -wt and the phase shift of each element of length with respect to that central plane wave is given by e-i kxj sinJ . But we know from integral calculus what to do with this sort of thing when we see it: We take the limit as the ...
PowerPoint Presentation - Tip-tilt mirror and sensor configuration
... diffracted field U2 can be computed from the incident field U1 by a phase factor times the Fourier transform of U1 • “Image plane is Fourier transform of pupil ...
... diffracted field U2 can be computed from the incident field U1 by a phase factor times the Fourier transform of U1 • “Image plane is Fourier transform of pupil ...
Chapter 18 - Handbook of Optics
... was developed by Wynne (1965, 1974) for the region of the spectrum extending from 365 to 1014 nm. It is used to extend the field of a parabolic mirror. Versions for a Ritchey-Chretien primary also exist. The corrector is able to correct spherical aberration, coma, astigmatism, and field curvature wh ...
... was developed by Wynne (1965, 1974) for the region of the spectrum extending from 365 to 1014 nm. It is used to extend the field of a parabolic mirror. Versions for a Ritchey-Chretien primary also exist. The corrector is able to correct spherical aberration, coma, astigmatism, and field curvature wh ...
High-speed addressable confocal microscopy for functional imaging
... camera capable of recording at 1 kHz; however, its dynamic range is limited to 7 bits兲. At least one camera is available that can record at 2 kHz with 12 bits of dynamic range,13 but it is only 80⫻ 80 pixels, thus limiting either the total field of view or the achievable spatial resolution, dependin ...
... camera capable of recording at 1 kHz; however, its dynamic range is limited to 7 bits兲. At least one camera is available that can record at 2 kHz with 12 bits of dynamic range,13 but it is only 80⫻ 80 pixels, thus limiting either the total field of view or the achievable spatial resolution, dependin ...
Microscope Basics
... The objective lenses are the most important components of microscopes and thus will be discussed in greater detail here. Their basic function is to gather the light passing through the specimen and then to project the image up into the body of the microscope. Then, the eyepiece lens system further m ...
... The objective lenses are the most important components of microscopes and thus will be discussed in greater detail here. Their basic function is to gather the light passing through the specimen and then to project the image up into the body of the microscope. Then, the eyepiece lens system further m ...
Axial birefringence in high-numerical-aperture optical
... So far, the present results agree with those of Stamnes and Jiang.16 In this paper three approximations are used that simplify the expressions derived for the propagator matrices considerably without compromising the quantitative validity of the expressions. The first of these approximations is the ...
... So far, the present results agree with those of Stamnes and Jiang.16 In this paper three approximations are used that simplify the expressions derived for the propagator matrices considerably without compromising the quantitative validity of the expressions. The first of these approximations is the ...
Rays and Optical beams
... In geometrical optics, the propagation of optical waves can be described approximately by using the concept of rays. This is valid provided the beam diameter is much larger than the wavelength and the diffraction can be neglected. The rays travel in straight lines in homogeneous media and obey Ferma ...
... In geometrical optics, the propagation of optical waves can be described approximately by using the concept of rays. This is valid provided the beam diameter is much larger than the wavelength and the diffraction can be neglected. The rays travel in straight lines in homogeneous media and obey Ferma ...
Four Aces of Refractive Surgery: Aberrations
... Shack principle. It is a technique developed by Johannes Hartmann in 1900 and modified by Shack and Platt in the late 1960s. Numerous other methodologies and applications have since arisen.The first measurements of HOAs were conducted by Smirov using a psychophysical method, in 19618. All aberromete ...
... Shack principle. It is a technique developed by Johannes Hartmann in 1900 and modified by Shack and Platt in the late 1960s. Numerous other methodologies and applications have since arisen.The first measurements of HOAs were conducted by Smirov using a psychophysical method, in 19618. All aberromete ...
Single-plane multiple speckle pattern phase retrieval
... retrieval technique a viable tool in coherent metrology and in nondestructive testing. The firsttime use of SLM in the multiple-intensity phase retrieval approach was demonstrated by Kohler, et al. [21]. In [21], the SLM was used as a dynamic phase modulator to replace the transverse mechanical tran ...
... retrieval technique a viable tool in coherent metrology and in nondestructive testing. The firsttime use of SLM in the multiple-intensity phase retrieval approach was demonstrated by Kohler, et al. [21]. In [21], the SLM was used as a dynamic phase modulator to replace the transverse mechanical tran ...
Beam steering with spatial light modulators: Quantisation effects
... ), so the experimental set up would need to be improved. In order to do that, we could replace the focusing lens by a teleobjective system with an even higher focal length. This variation on the experimental setup would permit to obtain bigger spots and measure quantisation effects even if no limita ...
... ), so the experimental set up would need to be improved. In order to do that, we could replace the focusing lens by a teleobjective system with an even higher focal length. This variation on the experimental setup would permit to obtain bigger spots and measure quantisation effects even if no limita ...
Optimized back-focal-plane interferometry directly measures forces
... However, using the deflection of the trapping beam to measure the motion of the sample connected the measurements of positions and of momenta. The deflection of the light cone used by Ghislain and Webb naturally contains information on the change in the momentum of the photons, as S. Smith et al. [ ...
... However, using the deflection of the trapping beam to measure the motion of the sample connected the measurements of positions and of momenta. The deflection of the light cone used by Ghislain and Webb naturally contains information on the change in the momentum of the photons, as S. Smith et al. [ ...
F-number
In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture) of an optical system is the ratio of the lens's focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography. The number is commonly notated using a hooked f, i.e. f/N, where N is the f-number.