Ultra–large field-of-view two-photon microscopy
... The design of the scan system begins with the selection of the objective. We seek a field-ofview that encompasses 10 mm, a numerical aperture (NA) to achieve 1-µm resolution, and a back aperture that does not exceed 25 mm. The singular choice is a 4-times magnification (f = 45 mm), 0.28 NA air-immer ...
... The design of the scan system begins with the selection of the objective. We seek a field-ofview that encompasses 10 mm, a numerical aperture (NA) to achieve 1-µm resolution, and a back aperture that does not exceed 25 mm. The singular choice is a 4-times magnification (f = 45 mm), 0.28 NA air-immer ...
Chromatic and Monochromatic Aberrations
... (reference material: Keating 20.9-20.11, 20.15,20.16) Everything you have learned about object and image formation is an approximation. When light is refracted by spherical surfaces the rays do not all converge to a point, even if they are of one wavelength. Monochromatic aberrations can arise from ...
... (reference material: Keating 20.9-20.11, 20.15,20.16) Everything you have learned about object and image formation is an approximation. When light is refracted by spherical surfaces the rays do not all converge to a point, even if they are of one wavelength. Monochromatic aberrations can arise from ...
Optics - Frederiksen
... loaded parallel to the tube axis. The holder is provided with a power supply which can deliver 6 kV DC at max. 2 mA to the electrodes built into the base of the insulated holder. Can be used with spectral tubes 2850.00 – 2851.30 and with many other types of spectral tubes. Dimensions: 78 x 78 x 290 ...
... loaded parallel to the tube axis. The holder is provided with a power supply which can deliver 6 kV DC at max. 2 mA to the electrodes built into the base of the insulated holder. Can be used with spectral tubes 2850.00 – 2851.30 and with many other types of spectral tubes. Dimensions: 78 x 78 x 290 ...
Advanced optics tutorials
... The KPX043 lens has a focal length of 25.4 mm. Thus, at the focused spot, we have a radius θ1f = 16.5 µm. So, the diameter of the spot will be 33 µm. This is a fundamental limitation on the minimum size of the focused spot in this application. We have already assumed a perfect, aberration-free lens. ...
... The KPX043 lens has a focal length of 25.4 mm. Thus, at the focused spot, we have a radius θ1f = 16.5 µm. So, the diameter of the spot will be 33 µm. This is a fundamental limitation on the minimum size of the focused spot in this application. We have already assumed a perfect, aberration-free lens. ...
Tutorial of Telecentric Lens
... Nowadays, high accuracy and performance of critical to many machine vision system, a method that use telecentric lens allows highest possible accuracy to be obtained. This tutorial introduced the concept and set up for the object-space telecenric system and image-space telecentric system and advanta ...
... Nowadays, high accuracy and performance of critical to many machine vision system, a method that use telecentric lens allows highest possible accuracy to be obtained. This tutorial introduced the concept and set up for the object-space telecenric system and image-space telecentric system and advanta ...
Recent Developments in Optofluidic Lens Technology
... soft materials, and deformable liquids, such as optofluidics. Extensive reviews of various optofluidic systems, their utilities, and applications [1–5] are available. The advent of such optofluidic devices has provided an alternative route to re-designing and improving pristine optical systems. Such ...
... soft materials, and deformable liquids, such as optofluidics. Extensive reviews of various optofluidic systems, their utilities, and applications [1–5] are available. The advent of such optofluidic devices has provided an alternative route to re-designing and improving pristine optical systems. Such ...
ptical Short Course International
... Figure 1. EFL and F/# of a Projection Lens From OSCI’s Optics of Digital Projectors DVD Course http://www.oscintl.com/prod01.htm In some cases the relationship between the effective focal length and the back focal distance is very important. In the case where the back focal distance is greater than ...
... Figure 1. EFL and F/# of a Projection Lens From OSCI’s Optics of Digital Projectors DVD Course http://www.oscintl.com/prod01.htm In some cases the relationship between the effective focal length and the back focal distance is very important. In the case where the back focal distance is greater than ...
File
... larger diameter. This patch of diameter AB is called the circle of least confusion, which corresponds to the position of the best image. The distance Im IP, measures the longitudinal spherical aberration. The radius of the circle of least confusion measures the lateral spherical aberration. When the ...
... larger diameter. This patch of diameter AB is called the circle of least confusion, which corresponds to the position of the best image. The distance Im IP, measures the longitudinal spherical aberration. The radius of the circle of least confusion measures the lateral spherical aberration. When the ...
F - mjburns.net
... light moving from air into glass will move toward the normal light moving from glass back into air will move away from the normal virtual focus ...
... light moving from air into glass will move toward the normal light moving from glass back into air will move away from the normal virtual focus ...
Vision and Optical Instruments
... For an eye with this typical 2.00 cm lens-to-retina distance, the power of the eye ranges from 50.0 D (for distant totally relaxed vision) to 54.0 D (for close fully accommodated vision), which is an 8% increase. This increase in power for close vision is consistent with the preceding discussion and ...
... For an eye with this typical 2.00 cm lens-to-retina distance, the power of the eye ranges from 50.0 D (for distant totally relaxed vision) to 54.0 D (for close fully accommodated vision), which is an 8% increase. This increase in power for close vision is consistent with the preceding discussion and ...
Optics Lesson 6
... Concave lenses produce images which are virtual. If the refracted rays are extended backwards behind the lens, an important observation is made. The extension of the refracted rays will intersect at a point. This point is known as the focal point. The first generalization can now be made for the ref ...
... Concave lenses produce images which are virtual. If the refracted rays are extended backwards behind the lens, an important observation is made. The extension of the refracted rays will intersect at a point. This point is known as the focal point. The first generalization can now be made for the ref ...
Presentation
... They presented a focus-switching device for 3D head mounted displays. A twisted nematic (TN) cell liquid crystal is used as polarization switch to control the optical path length through the system. Different polarization state leads to different path length in the proposed optical system, which in ...
... They presented a focus-switching device for 3D head mounted displays. A twisted nematic (TN) cell liquid crystal is used as polarization switch to control the optical path length through the system. Different polarization state leads to different path length in the proposed optical system, which in ...
Waves & Oscillations Physics 42200 Spring 2013 Semester Lecture 30 – Geometric Optics
... – All rays that pass through the center, , do not bend – All rays converge to points in the focal plane (back focal plane) ...
... – All rays that pass through the center, , do not bend – All rays converge to points in the focal plane (back focal plane) ...
Report Liquid Lens
... meters. The closer objects are to a lens, the more the lens must bend the light to bring them into focus. So when an object is far away, a lens needs less optical power to bring it into focus than it does when the object is near. Our liquid lens changes its focus by changing its optical power throu ...
... meters. The closer objects are to a lens, the more the lens must bend the light to bring them into focus. So when an object is far away, a lens needs less optical power to bring it into focus than it does when the object is near. Our liquid lens changes its focus by changing its optical power throu ...
Planoconcave lens by negative refraction of stacked subwavelength
... Refractive Index (NRI) at optical frequencies [13]. This possibility has been opened by the fabrication of metamaterials in a pair of subwavelength hole arrays drilled in very thin metallic plates [14,15]. Nevertheless, losses are still a serious drawback in these structures. Similar results have be ...
... Refractive Index (NRI) at optical frequencies [13]. This possibility has been opened by the fabrication of metamaterials in a pair of subwavelength hole arrays drilled in very thin metallic plates [14,15]. Nevertheless, losses are still a serious drawback in these structures. Similar results have be ...
Accurate predictive model for twisted nematic liquid crystal devices. Application
... spatial resolution and the frame rate. In general, the fast SLMs have a low spatial resolution, whereas the SLMs with a high resolution are relatively slow. Display application requires a relatively large resolution (>1000 x 1000 picture elements or pixels) with a relatively low (60 Hz) frame rate n ...
... spatial resolution and the frame rate. In general, the fast SLMs have a low spatial resolution, whereas the SLMs with a high resolution are relatively slow. Display application requires a relatively large resolution (>1000 x 1000 picture elements or pixels) with a relatively low (60 Hz) frame rate n ...
PowerPoint Lecture - UCSD Department of Physics
... look at aberrations build lens systems (beam expanders, telescopes) learn how to compile and run C programs (and modify?) in conjunction with some geometrical design ...
... look at aberrations build lens systems (beam expanders, telescopes) learn how to compile and run C programs (and modify?) in conjunction with some geometrical design ...
Physics II - Magnetism
... Jason (owner of the good ship Argo) used a polished metal shield as a mirror when he chopped off the head of the Gorgon Medusa (he had to use a mirror because if you look at a Gorgon, they like turn you into stone). Modern mirrors are made of glass or clear plastic and have a thin, very smooth layer ...
... Jason (owner of the good ship Argo) used a polished metal shield as a mirror when he chopped off the head of the Gorgon Medusa (he had to use a mirror because if you look at a Gorgon, they like turn you into stone). Modern mirrors are made of glass or clear plastic and have a thin, very smooth layer ...
Microscope
... so that oil is used in these lenses as it has refractive index similar to glass, lenses and specimen which equal 1.51 ,as a result the distortion will decrease. ...
... so that oil is used in these lenses as it has refractive index similar to glass, lenses and specimen which equal 1.51 ,as a result the distortion will decrease. ...
PPT
... • While it may not be Zemax, I’ve cobbled together a C-program (and Python) to do raytracing of any number of lenses/mirrors – restricted to the following conditions: ...
... • While it may not be Zemax, I’ve cobbled together a C-program (and Python) to do raytracing of any number of lenses/mirrors – restricted to the following conditions: ...
Measuring the Real Point Spread Function of High Numerical
... concave reflective surface — of the same or larger numerical aperture and of perfect (comparatively speaking) optical quality. This is problematic. Even if two lenses of the same type are available, a problem still remains of apportioning the measured aberrations to the individual lenses. The star t ...
... concave reflective surface — of the same or larger numerical aperture and of perfect (comparatively speaking) optical quality. This is problematic. Even if two lenses of the same type are available, a problem still remains of apportioning the measured aberrations to the individual lenses. The star t ...
Optical Elements
... worth mentioning that small-scale roughness of a typical mirror surface, measured on distances of a micrometer scale, is about 0.01 nm (standard float glass— 0.02 nm), while large-scale roughness measured on a millimeter scale may vary from 0.1 to 1 nm. Reflecting layer may be either wide-band or na ...
... worth mentioning that small-scale roughness of a typical mirror surface, measured on distances of a micrometer scale, is about 0.01 nm (standard float glass— 0.02 nm), while large-scale roughness measured on a millimeter scale may vary from 0.1 to 1 nm. Reflecting layer may be either wide-band or na ...
Physics for Scientists & Engineers 2
... ! A concave lens is shaped such that parallel rays will be caused to diverge by refraction such that their extrapolation would intersect at a focal distance from the center of the lens on the same side of the lens as the rays are incident ...
... ! A concave lens is shaped such that parallel rays will be caused to diverge by refraction such that their extrapolation would intersect at a focal distance from the center of the lens on the same side of the lens as the rays are incident ...
Document
... Reflection is when light changes direction by bouncing off a surface. When light is reflected off a mirror, it hits the mirror at the same angle (the incidence angle, θi) as it reflects off the mirror (the reflection angle, θr). ...
... Reflection is when light changes direction by bouncing off a surface. When light is reflected off a mirror, it hits the mirror at the same angle (the incidence angle, θi) as it reflects off the mirror (the reflection angle, θr). ...
Optician
An optician, or dispensing optician, is a technical practitioner who designs, fits and dispenses corrective lenses for the correction of a person's vision. Opticians determine the specifications of various ophthalmic appliances that will give the necessary correction to a person's eyesight. Some registered or licensed opticians also design and fit special appliances to correct cosmetic, traumatic or anatomical defects. These devices are called shells or artificial eyes. Other registered or licensed opticians manufacture lenses to their own specifications and design and manufacture spectacle frames and other devices.Corrective ophthalmic appliances may be contact lenses, spectacles lenses, low vision aids or ophthalmic prosthetics to those who are partially sighted. The appliances are mounted either on the eye as contact lenses or mounted in a frame or holder in front of the eye as spectacles or as a monocle.Opticians may work in any variety of settings such as joint practice, hospitals, laboratories, eye care centers or retail stores. However, registered opticians have to meet standards of practice and training, commit to ongoing education, hold professional liability insurance and are held to these standards by their respective regulating bodies.A fully credentialed optician in the United States is college educated in Optical Science and is known as an Ophthalmic Optician® (O.O.) and they are credentialed by the Society to Advance Opticianry (SAO). To achieve this nationally registered title an optician must achieve a combination of a college education, American Board of Opticianry and National Contact Lens Examiners advanced certifications, or maintain their state license in both eyewear dispensing and contact lens fitting when applicable. In the United Kingdom, an ophthalmic optician is also known as an optometrist and is regulated by the General Optical Council under the Opticians Act 1989.Like many health care providers, opticians are regulated professionals in certain countries. The profession is often regulated by optician-specific agencies, as in Canada and some states of the U.S., or jointly with optometry such as the New Zealand Optometrist and Dispensing Opticians Board or the United Kingdom General Optical Council. Opticians may work independently or dependently with an optometrist or ophthalmologist although some opticians may work in an optical labaratory as a labaratory technical optician. Opticians convert a prescription for the correction of a refractive error into an ophthalmic lens or some other device, such as reading aids or telescopic lenses.