Lecture 31 - Purdue Physics
... middle of the aperture stop It is effectively the central ray of the bundle emerging from a point on an object that can get through the aperture. Importance: aberrations in optical systems ...
... middle of the aperture stop It is effectively the central ray of the bundle emerging from a point on an object that can get through the aperture. Importance: aberrations in optical systems ...
Lecture 04
... • Point spread function 3D • Though often defined as the same that is not quite true ...
... • Point spread function 3D • Though often defined as the same that is not quite true ...
Ray Diagram PRELAB LAB
... Apparatus: Biconvex glass lens, spherical concave mirror, meter ruler, optical bench, lens holder, self-illuminated object (generally a vertical arrow), screen. ...
... Apparatus: Biconvex glass lens, spherical concave mirror, meter ruler, optical bench, lens holder, self-illuminated object (generally a vertical arrow), screen. ...
Get PDF - OSA Publishing
... light sources. We also performed an interpolation, noise reduction, and deconvolution process that has been widely applied to conventional microscopy imaging techniques, and the results are presented in Figs. 3(c) and 3(d), respectively. The signal-to-noise (S/N) ratio as well as overall image quali ...
... light sources. We also performed an interpolation, noise reduction, and deconvolution process that has been widely applied to conventional microscopy imaging techniques, and the results are presented in Figs. 3(c) and 3(d), respectively. The signal-to-noise (S/N) ratio as well as overall image quali ...
Microscope
... two points as separate and distinct even when they are so close together that they appear as one to the unaided eye. This distance at which two points appear as one is about 0.1 mm at ten inches for the human eye. This distance is called the resolving power and can be expressed as the relationship o ...
... two points as separate and distinct even when they are so close together that they appear as one to the unaided eye. This distance at which two points appear as one is about 0.1 mm at ten inches for the human eye. This distance is called the resolving power and can be expressed as the relationship o ...
Paraxial Formulas - CVI Laser Optics
... is an important concept when the throughput or lightgathering power of an optical system is critical, such as when focusing light into a monochromator or projecting a high-power image. ...
... is an important concept when the throughput or lightgathering power of an optical system is critical, such as when focusing light into a monochromator or projecting a high-power image. ...
ChE 393 Course Notes
... Here the “cutoff frequency” is defined as /f-number where f-number = focal length/diameter of lens Note that coherent light gives good contrast until the frequency reaches 0.5 (normalized units), then drops to 0. Incoherent light has a slowly ...
... Here the “cutoff frequency” is defined as /f-number where f-number = focal length/diameter of lens Note that coherent light gives good contrast until the frequency reaches 0.5 (normalized units), then drops to 0. Incoherent light has a slowly ...
Properties of Light and Visual Function
... In the above illustration, black dots appear to form and vanish at the intersections of the gray horizontal and vertical lines. When focusing attention on a single white dot, some gray dots nearby and some black dots a little further away also seem to appear. More black dots seem to appear as the e ...
... In the above illustration, black dots appear to form and vanish at the intersections of the gray horizontal and vertical lines. When focusing attention on a single white dot, some gray dots nearby and some black dots a little further away also seem to appear. More black dots seem to appear as the e ...
Mirror Example • Consider a concave mirror radius r =
... This correctly shows both position and magnification of object This really shows how the light rays are travelling Eg Ray through the focal point F (ray 6) becomes parallel (ray 7) Intersects ray 5 again at image Q’ Can use graphics to solve exactly But often sketch this to see if optic ...
... This correctly shows both position and magnification of object This really shows how the light rays are travelling Eg Ray through the focal point F (ray 6) becomes parallel (ray 7) Intersects ray 5 again at image Q’ Can use graphics to solve exactly But often sketch this to see if optic ...
the optical (light) microscope
... These observations are compared to known details about the physical metallurgy of the material being examined. If doubt still remains or if the structure is too fine to observe, more sophisticated techniques must be implemented. Polished or etched metallographic specimens are examined by optical ...
... These observations are compared to known details about the physical metallurgy of the material being examined. If doubt still remains or if the structure is too fine to observe, more sophisticated techniques must be implemented. Polished or etched metallographic specimens are examined by optical ...
Modulation Transfer Function
... where C(s) is the object contrast and C 0 (s0 ) the image contrast. A value of 1 means that frequency is perfectly transferred to the image plane, which is the best possible outcome in a passive system. A value of 0 means that frequency will not appear at all in the image. The object- and image-spac ...
... where C(s) is the object contrast and C 0 (s0 ) the image contrast. A value of 1 means that frequency is perfectly transferred to the image plane, which is the best possible outcome in a passive system. A value of 0 means that frequency will not appear at all in the image. The object- and image-spac ...
Optical and Electron Microscopy
... There exist two main families of electron microscope. The transmission electron microscope (TEM) is an instrument that achieves the highest resolution. (The terms TEM and HREM are to some extent interchangeable, although the TEM is not used exclusively for high-resolution observations). The TEM, as ...
... There exist two main families of electron microscope. The transmission electron microscope (TEM) is an instrument that achieves the highest resolution. (The terms TEM and HREM are to some extent interchangeable, although the TEM is not used exclusively for high-resolution observations). The TEM, as ...
4.6 Lenses
... • where light rays come together when they pass through a lens • because light can pass through both sides of a lens, lenses have two focal points (principal focus = F & secondary focus = F’) ...
... • where light rays come together when they pass through a lens • because light can pass through both sides of a lens, lenses have two focal points (principal focus = F & secondary focus = F’) ...
Fraunhofer Diffraction
... parallel to the rail. Set the mesh with the largest available period onto the optical rail immediately behind the laser. Place the screen onto the rail, 15-20 cm away from its other end. Place L1 (it is advisable to use the lens with a larger focal length here) 15-20 cm away from the mesh. 3. Adjust ...
... parallel to the rail. Set the mesh with the largest available period onto the optical rail immediately behind the laser. Place the screen onto the rail, 15-20 cm away from its other end. Place L1 (it is advisable to use the lens with a larger focal length here) 15-20 cm away from the mesh. 3. Adjust ...
Head-Mounted Display
... optical train. The eyepiece is then used to produce an observable virtual image of this intermediate image. Exit Pupil ...
... optical train. The eyepiece is then used to produce an observable virtual image of this intermediate image. Exit Pupil ...
PHYS 1112 In-Class Exam #1A Thu. Feb. 5, 2009, 11:00am-12:15pm
... The exam consists of 12 multiple-choice questions. Each question is worth one raw score point. There will be no penalty for wrong answers. No partial credit will be given. I recommend that you read all the questions at the start so that you can allocate your time wisely. (Answer the easy questions f ...
... The exam consists of 12 multiple-choice questions. Each question is worth one raw score point. There will be no penalty for wrong answers. No partial credit will be given. I recommend that you read all the questions at the start so that you can allocate your time wisely. (Answer the easy questions f ...
Planoconcave lens by negative refraction of stacked subwavelength
... Refractive Index (NRI), thus leading to the opposite Snell’s refraction law at the interface between a standard and a NRI medium, among other interesting properties. He also foresaw that a simple slab of thickness d, made of a metamaterial having refractive index n = - 1, can focus in a point the ra ...
... Refractive Index (NRI), thus leading to the opposite Snell’s refraction law at the interface between a standard and a NRI medium, among other interesting properties. He also foresaw that a simple slab of thickness d, made of a metamaterial having refractive index n = - 1, can focus in a point the ra ...
Laboratory Exercise 3: Microscopy The microscope is a tool for the
... immersion objective. This lens has high resolution and high N.A., since the lens gathers in a great amount of light. High resolving power is enhanced by clear mineral oil between the objective and the slide. The oil has a refractive (light-bending) index similar to glass; it reduces the amount of li ...
... immersion objective. This lens has high resolution and high N.A., since the lens gathers in a great amount of light. High resolving power is enhanced by clear mineral oil between the objective and the slide. The oil has a refractive (light-bending) index similar to glass; it reduces the amount of li ...
Microscopy Basics
... Bright field microscopy is based on absorption of light in the sample. Most biological objects, however, absorb only weakly in the visible spectrum. This lead to: • Development of specific staining (nowadays almost entirely replaced by fluorescent labeling) • Development of UV microscopy (Köhler) fa ...
... Bright field microscopy is based on absorption of light in the sample. Most biological objects, however, absorb only weakly in the visible spectrum. This lead to: • Development of specific staining (nowadays almost entirely replaced by fluorescent labeling) • Development of UV microscopy (Köhler) fa ...
Evanescent-field optical microscopy: effects of polarization, tip
... the grating lines. The p-polarization image displays a grating with steps 4.3/xm wide and 1.5 high, while the s-polarization image only vaguely reveals the grating with 0.9 /xm step height. Fig. 4a displays steep slopes on the grating edges which are the result of abrupt changes in feedback action. ...
... the grating lines. The p-polarization image displays a grating with steps 4.3/xm wide and 1.5 high, while the s-polarization image only vaguely reveals the grating with 0.9 /xm step height. Fig. 4a displays steep slopes on the grating edges which are the result of abrupt changes in feedback action. ...
Spherical Aberration. q ℓ
... ¡ a href=”http://www.edmundoptics.com/technical-resources-center/optics/compar of-optical-aberrations/”¿Edmunds Optical webpage¡/a¿ ¡ a href=”https://en.wikipedia.org/wiki/Optical aberration”¿WikiPedia articles aware of its weakness as first two are not.¡/a¿ ¡ a href=”https://micro.magnet.fsu.edu/pr ...
... ¡ a href=”http://www.edmundoptics.com/technical-resources-center/optics/compar of-optical-aberrations/”¿Edmunds Optical webpage¡/a¿ ¡ a href=”https://en.wikipedia.org/wiki/Optical aberration”¿WikiPedia articles aware of its weakness as first two are not.¡/a¿ ¡ a href=”https://micro.magnet.fsu.edu/pr ...
Chapter 25: Optical Instruments
... Most of the refraction occurs in the cornea, not the lens. The lens, by changing shapes under stress from the ciliary muscles, makes fine focus adjustment. When the muscles are relaxed, the lens should focus at . When they contract, the center of the lens thickens, shortening the focal length so n ...
... Most of the refraction occurs in the cornea, not the lens. The lens, by changing shapes under stress from the ciliary muscles, makes fine focus adjustment. When the muscles are relaxed, the lens should focus at . When they contract, the center of the lens thickens, shortening the focal length so n ...
Superlens
A practical superlens, or super lens, is a lens which uses metamaterials to go beyond the diffraction limit. The diffraction limit is a feature of conventional lenses and microscopes that limits the fineness of their resolution. Many lens designs have been proposed that go beyond the diffraction limit in some way, but there are constraints and obstacles involved in realizing each of them.