Electron gun - Wikipedia, the free encyclopedia
... one producing a different stream of electrons. Each stream travels through a shadow mask where the electrons will impinge upon either a red, green or blue phosphor to light up a color pixel on the screen. The resultant http://en.wikipedia.org/wiki/Electron_gun ...
... one producing a different stream of electrons. Each stream travels through a shadow mask where the electrons will impinge upon either a red, green or blue phosphor to light up a color pixel on the screen. The resultant http://en.wikipedia.org/wiki/Electron_gun ...
Light
... When light hits metal it knocks electrons off the surface. They found that red light cannot knock electrons off metal no matter how bright it is. If light were a wave then the brighter light should have more energy. Photons are light particles that contain certain amounts of energy based on their fr ...
... When light hits metal it knocks electrons off the surface. They found that red light cannot knock electrons off metal no matter how bright it is. If light were a wave then the brighter light should have more energy. Photons are light particles that contain certain amounts of energy based on their fr ...
10-SNC2D-ConcaveContinued-10
... of curvature is reflected back into itself. 3. A ray through the focus will reflect parallel to the principal axis. 4. A ray aimed at the vertex will follow through the law of reflection. ...
... of curvature is reflected back into itself. 3. A ray through the focus will reflect parallel to the principal axis. 4. A ray aimed at the vertex will follow through the law of reflection. ...
Wave Light Test
... The following diagrams show rays of light reflected by a spherical concave mirror. The point C represents the centre of curvature and ƒ, the focal point. Which of the diagrams best shows the paths of a light rays reflected by a concave mirror? ...
... The following diagrams show rays of light reflected by a spherical concave mirror. The point C represents the centre of curvature and ƒ, the focal point. Which of the diagrams best shows the paths of a light rays reflected by a concave mirror? ...
Document
... the CCD camera a complete spectrum is generated • This permits classification on the basis of color ...
... the CCD camera a complete spectrum is generated • This permits classification on the basis of color ...
700 nm 400 nm Wavelength, λ Frequency, f 4x1014 Hz
... In the case of a plane mirror, the image distance si from the mirror is the same as the object distance so from the mirror. The most common curved mirror is a spherical mirror. A concave or converging mirror has its reflecting surface on the inside of the sphere. Parallel light rays reflecting on a ...
... In the case of a plane mirror, the image distance si from the mirror is the same as the object distance so from the mirror. The most common curved mirror is a spherical mirror. A concave or converging mirror has its reflecting surface on the inside of the sphere. Parallel light rays reflecting on a ...
Nineteen Ways to do 3-Dimensional Imaging
... Speckle interferometry is also known as electronic speckle pattern interferometry or as TV holography. It depends on the object being imaged to have a diffusely reflecting (i.e., rough) surface to create the speckle pattern. It also requires a reference surface which must also be diffusely reflectin ...
... Speckle interferometry is also known as electronic speckle pattern interferometry or as TV holography. It depends on the object being imaged to have a diffusely reflecting (i.e., rough) surface to create the speckle pattern. It also requires a reference surface which must also be diffusely reflectin ...
Refraction and Lenses Learning Guide
... 8. When light is passing from a medium with a high index of refraction to one with a lower index of refraction at the critical angle, what is the angle of refraction? 90o 9. If the light is incident at a greater angle what happens? total internal reflection 10. Describe the lenses (number and type) ...
... 8. When light is passing from a medium with a high index of refraction to one with a lower index of refraction at the critical angle, what is the angle of refraction? 90o 9. If the light is incident at a greater angle what happens? total internal reflection 10. Describe the lenses (number and type) ...
HP Unit 11-light & optics - student handout
... Pit vipers, pythons, and boas possess special organs that form images in the brain of the thermal environment, much like vision occurs in the human brain. Thus, these snakes "see" heat, and this amazing system is the most sensitive infrared detector on Earth, natural or artificial. ...
... Pit vipers, pythons, and boas possess special organs that form images in the brain of the thermal environment, much like vision occurs in the human brain. Thus, these snakes "see" heat, and this amazing system is the most sensitive infrared detector on Earth, natural or artificial. ...
Head-Mounted Display
... Retina - The sensory membrane that lines the back of the eye and receives the image formed by the lens of the eye. Fovea - The part of the human retina that possesses the best spatial resolution or visual acuity. ...
... Retina - The sensory membrane that lines the back of the eye and receives the image formed by the lens of the eye. Fovea - The part of the human retina that possesses the best spatial resolution or visual acuity. ...
Light microscopy
... 5. By noting the length of an unknown structure in graticule divisions you can then convert this into absolute units of length, e.g. µm. 6. Each objective lens needs to be calibrated in the same way. Once calibrated objects can be measured in EPUs. EPUs are converted into absolute measurement using ...
... 5. By noting the length of an unknown structure in graticule divisions you can then convert this into absolute units of length, e.g. µm. 6. Each objective lens needs to be calibrated in the same way. Once calibrated objects can be measured in EPUs. EPUs are converted into absolute measurement using ...
Lab #8 Ray Optics
... light interacts with the prism material differently. When light travels through a transparent object its speed is reduced relative to its speed in a vacuum. This change in speed can cause bending or refraction of light. When you look into a pool of water things appear at different positions than the ...
... light interacts with the prism material differently. When light travels through a transparent object its speed is reduced relative to its speed in a vacuum. This change in speed can cause bending or refraction of light. When you look into a pool of water things appear at different positions than the ...
CT_optics
... A diffraction grating is illuminated with yellow light at normal incidence. The pattern seen on a screen behind the grating consists of three yellow spots, one at zero degrees (straight through) and one each at ±45°.You now add red light of equal intensity, coming in the same direction as the yello ...
... A diffraction grating is illuminated with yellow light at normal incidence. The pattern seen on a screen behind the grating consists of three yellow spots, one at zero degrees (straight through) and one each at ±45°.You now add red light of equal intensity, coming in the same direction as the yello ...
Lenses - Cloudfront.net
... Converging Lens – a lens which is thicker in the middle, makes parallel light rays converge Diverging Lens – a lens which is thinner in the middle, makes parallel light rays diverge Principle Axis – line joining the centers of curvature of a lens’ surface Focal Point – the point at which a beam of l ...
... Converging Lens – a lens which is thicker in the middle, makes parallel light rays converge Diverging Lens – a lens which is thinner in the middle, makes parallel light rays diverge Principle Axis – line joining the centers of curvature of a lens’ surface Focal Point – the point at which a beam of l ...
Slide 1
... Sharp maximum intensity at x=0, and intensity goes through 0 at integer multiples of one-half number. ...
... Sharp maximum intensity at x=0, and intensity goes through 0 at integer multiples of one-half number. ...
D - Purdue Physics
... Telescopes must collect as much light as possible from the generally very dim objects many light-years away. It’s easier to create large mirrors than large lenses (only the surface needs to be very precise). ...
... Telescopes must collect as much light as possible from the generally very dim objects many light-years away. It’s easier to create large mirrors than large lenses (only the surface needs to be very precise). ...
Imaging
... Each CCD is divided into many groups of electrodes called pixels. The exact number of pixels depends on the individual pixel size and the cost of the array. Typically, a low-cost commercial array has dimensions of 600 x 300 pixels, while high cost arrays for scientific applications have dimensions c ...
... Each CCD is divided into many groups of electrodes called pixels. The exact number of pixels depends on the individual pixel size and the cost of the array. Typically, a low-cost commercial array has dimensions of 600 x 300 pixels, while high cost arrays for scientific applications have dimensions c ...
Following the path of light: recovering and
... To clarify what we mean by following the path of light, let us first discuss a simple experiment we use to introduce the problem of vision to students. Let us consider the object in Fig. 1(a), which is a small plastic box containing transparent gel deco beads and water. Refractive index of beads is v ...
... To clarify what we mean by following the path of light, let us first discuss a simple experiment we use to introduce the problem of vision to students. Let us consider the object in Fig. 1(a), which is a small plastic box containing transparent gel deco beads and water. Refractive index of beads is v ...
Microscope
... The range of size in parasites is large, varying from 1 micrometer in Leishmania to 37 feet for some tapeworms. Because nearly all parasites have life cycle stages that are microscopic (many large parasite produce small immature stages), the proper use of the microscope is crucial to successful para ...
... The range of size in parasites is large, varying from 1 micrometer in Leishmania to 37 feet for some tapeworms. Because nearly all parasites have life cycle stages that are microscopic (many large parasite produce small immature stages), the proper use of the microscope is crucial to successful para ...
How to turn your microscope into a phase contrast microscope
... professional phase contrast devices, but it can serve its purpose quite well. Note that, in the absence of any object with shifted phases, the image will always be dark. If there is an object, we will see light, but that does not reveal whether the phase shift is positive or negative. To make the si ...
... professional phase contrast devices, but it can serve its purpose quite well. Note that, in the absence of any object with shifted phases, the image will always be dark. If there is an object, we will see light, but that does not reveal whether the phase shift is positive or negative. To make the si ...
RESOLVING POWER AND MODULATION TRANSFER FUNCTION
... curve measured may be considered a resolved line pair which arises from the two components shown in the dashed curves. In addition, „scanning“ is meant to trace the „true“ curve without integration – hard to realize in any optical setup. Case (C) with the percentages displayed is known as the Raylei ...
... curve measured may be considered a resolved line pair which arises from the two components shown in the dashed curves. In addition, „scanning“ is meant to trace the „true“ curve without integration – hard to realize in any optical setup. Case (C) with the percentages displayed is known as the Raylei ...
The Focal Length of a Thin Converging Lens
... The ability of a lens to focus light is a consequence of its shape and optical density relative to that of the surrounding environment. For example, a thin converging lens, typically made from some type of glass, is fabricated into the shape of two spherical caps of relatively small curvature with t ...
... The ability of a lens to focus light is a consequence of its shape and optical density relative to that of the surrounding environment. For example, a thin converging lens, typically made from some type of glass, is fabricated into the shape of two spherical caps of relatively small curvature with t ...
Handout 7
... 1.2 Image Size Depends On Focal Length Note that our refractor as described so far has no eyepiece lens and thus will not allow someone to directly view the image it has created, since the human visual system isn’t designed to use already-focused light rays. Even so, our simple instrument is in fact ...
... 1.2 Image Size Depends On Focal Length Note that our refractor as described so far has no eyepiece lens and thus will not allow someone to directly view the image it has created, since the human visual system isn’t designed to use already-focused light rays. Even so, our simple instrument is in fact ...
Imaging of Intrinsic Signals in the Retina
... Adaptive optics (AO) is used to correct ocular aberrations of the human eye and so improves lateral and axial resolution and brightness of images of the retina. The Adaptive Optics Scanning Laser Ophthalmoscope (AOSLO) can be used to image intrinsic signals of the retina by monitoring image reflecta ...
... Adaptive optics (AO) is used to correct ocular aberrations of the human eye and so improves lateral and axial resolution and brightness of images of the retina. The Adaptive Optics Scanning Laser Ophthalmoscope (AOSLO) can be used to image intrinsic signals of the retina by monitoring image reflecta ...
Image intensifier
An image intensifier or image intensifier tube is a vacuum tube device for increasing the intensity of available light in an optical system to allow use under low-light conditions, such as at night, to facilitate visual imaging of low-light processes, such as fluorescence of materials in x-rays or gamma rays (x-ray image intensifier), or for conversion of non-visible light sources, such as near-infrared or short wave infrared to visible. They operate by converting photons of light into electrons, amplifying the electrons (usually with a microchannel plate), and then converting the amplified electrons back into photons for viewing. They are used in devices such as night vision goggles.