Uses of lenses
... – Curvature of incoming light becomes important – Result: Lens does not behave as expected – Solution: Variable focal length ...
... – Curvature of incoming light becomes important – Result: Lens does not behave as expected – Solution: Variable focal length ...
Uses of lenses - TAMU E.C.E. DEPT.
... • Scattering object acts as array of sources – image is replica -- one or two lenses – 4 f configuration puts image at a distance w/o magnification -- “relay” lenses ...
... • Scattering object acts as array of sources – image is replica -- one or two lenses – 4 f configuration puts image at a distance w/o magnification -- “relay” lenses ...
ESMATS / ESA SP-653
... NIRSpec (Fig.1) is a near-infrared, multi-object, dispersive spectrograph, which will be cooled at a temperature of 37 K in order to achieve the required sensitivity in the near-infrared spectral region. One of the most critical subassemblies is the RMA which is needed to accommodate the changes of ...
... NIRSpec (Fig.1) is a near-infrared, multi-object, dispersive spectrograph, which will be cooled at a temperature of 37 K in order to achieve the required sensitivity in the near-infrared spectral region. One of the most critical subassemblies is the RMA which is needed to accommodate the changes of ...
Lecture 6 PPT
... • There’s not much to be gained by making any particular term much smaller than all the others: try to roughly equalize all the terms • Individual terms we know so far: ...
... • There’s not much to be gained by making any particular term much smaller than all the others: try to roughly equalize all the terms • Individual terms we know so far: ...
I. The Spectrometer and the Balmer Series
... Qualitatively observe the sodium spectrum in first order for m=+1, identifying as many lines as possible. To observe fainter lines, it may be necessary to open the slit a little more, but not so much that the scattered light causes the background to become too light. You will also want to use the bl ...
... Qualitatively observe the sodium spectrum in first order for m=+1, identifying as many lines as possible. To observe fainter lines, it may be necessary to open the slit a little more, but not so much that the scattered light causes the background to become too light. You will also want to use the bl ...
Tutorial on Optomechanical Beam Steering Mechanisms
... polarized light if the tilt is out of the plane of incidence then the surfaces will have to have high transmission for both polarization states. This is difficult to achieve for angles ~>45 degrees. High angles also either require use of oversize pieces or acceptance of significant foreshortening of ...
... polarized light if the tilt is out of the plane of incidence then the surfaces will have to have high transmission for both polarization states. This is difficult to achieve for angles ~>45 degrees. High angles also either require use of oversize pieces or acceptance of significant foreshortening of ...
Measuring Double Stars with a Micrometer and Digital Image
... First it would be wise to find the orientation of the micrometer in the telescope field relative to the celestial sky. As we know the celestial sphere is marked off in the astronomer’s mind using an imaginary grid and we refer to the direction west and east as Right Ascension (RA). The north-south d ...
... First it would be wise to find the orientation of the micrometer in the telescope field relative to the celestial sky. As we know the celestial sphere is marked off in the astronomer’s mind using an imaginary grid and we refer to the direction west and east as Right Ascension (RA). The north-south d ...
I. The Spectrometer and the Balmer Series
... Without spending too much time with it, measure the wavelengths of the other sodium lines you see, and then compare with the table of wavelengths given below; note also their color, and that they are “doublets.” Note: in your notebook, you should include a column for wavelength, and calculate these ...
... Without spending too much time with it, measure the wavelengths of the other sodium lines you see, and then compare with the table of wavelengths given below; note also their color, and that they are “doublets.” Note: in your notebook, you should include a column for wavelength, and calculate these ...
AstroMaster Series Telescopes
... The diagonal is a prism that diverts the light at a right angle to the light path of the refractor. This allows you to observe in a position that is more comfortable than if you looked straight through. This diagonal is an erect image model that corrects the image to be right side up and oriented co ...
... The diagonal is a prism that diverts the light at a right angle to the light path of the refractor. This allows you to observe in a position that is more comfortable than if you looked straight through. This diagonal is an erect image model that corrects the image to be right side up and oriented co ...
HETDEX+VIRUS specs - University of Chicago, Astronomy
... Nine IFUs have been delivered to AIP to qualify vendors and evaluate the production design ...
... Nine IFUs have been delivered to AIP to qualify vendors and evaluate the production design ...
Telescopes
... Different parts of a spherical mirror have slightly different focal lengths This causes the image to be fuzzy because the light is focused over a range of positions The problem is corrected by varying the curvature of the mirror as function of position This makes the mirror parabolic ...
... Different parts of a spherical mirror have slightly different focal lengths This causes the image to be fuzzy because the light is focused over a range of positions The problem is corrected by varying the curvature of the mirror as function of position This makes the mirror parabolic ...
TAL
... LBC Blue alignment can be improved. Possible to check hub alignment to GR axis using A-Scope. “Wall-eye” of PMs and other system flexures need to be quantified and checked against available correction ranges of optical elements. Again, the A-Scope set-up for LBC alignment can give some useful measur ...
... LBC Blue alignment can be improved. Possible to check hub alignment to GR axis using A-Scope. “Wall-eye” of PMs and other system flexures need to be quantified and checked against available correction ranges of optical elements. Again, the A-Scope set-up for LBC alignment can give some useful measur ...
E5.2.7.5 GENERATION OF SHORT PULSES (Q
... The light of the pump diode laser of module (3) is brought via a fibre patch cable to the external set-up. It is kept in the holder (FH). The lens (C) is focusing the light into the Nd:YAG rod. The coating of the left side of the rod and the laser mirror (M2) are forming the optical cavity. The pass ...
... The light of the pump diode laser of module (3) is brought via a fibre patch cable to the external set-up. It is kept in the holder (FH). The lens (C) is focusing the light into the Nd:YAG rod. The coating of the left side of the rod and the laser mirror (M2) are forming the optical cavity. The pass ...
CCD Observatory in school - EU-HOU
... are definitely better (more sensitive). If possible, it is better to choose a camera with a resolution of 640 x 480 pixels, although even 320 x 240 pixels is enough for making quite interesting observations. The possibility of setting a very long time of exposure (up to half a minute) is a huge adva ...
... are definitely better (more sensitive). If possible, it is better to choose a camera with a resolution of 640 x 480 pixels, although even 320 x 240 pixels is enough for making quite interesting observations. The possibility of setting a very long time of exposure (up to half a minute) is a huge adva ...
G050348-00 - DCC
... Strange evidence: every time we tried to align the cavity, mode shapes became worse and worse (as with spherical end mirror) -> coupling measurements are not concluded yet Central part of the cavity seems “unstable”: maybe the problem is not the MH but the other two mirrors ...
... Strange evidence: every time we tried to align the cavity, mode shapes became worse and worse (as with spherical end mirror) -> coupling measurements are not concluded yet Central part of the cavity seems “unstable”: maybe the problem is not the MH but the other two mirrors ...
Topic 11_4__Resolution
... two sources to be just resolved. Know that the criterion for a circular aperture is = 1.22/b. 11.4.3 Describe the significance of resolution in the development of devices such as CDs and DVDs, the electron microscope and radio telescopes. 11.4.4 Solve problems involving resolution. ...
... two sources to be just resolved. Know that the criterion for a circular aperture is = 1.22/b. 11.4.3 Describe the significance of resolution in the development of devices such as CDs and DVDs, the electron microscope and radio telescopes. 11.4.4 Solve problems involving resolution. ...
Document
... • Allowing time and money for recovery from problems • Establish key dates for decisions, early Stick to them ...
... • Allowing time and money for recovery from problems • Establish key dates for decisions, early Stick to them ...
Astrophotography
... Why is Autoguiding better than manual guiding? Simply put the guide star illuminates more than one pixel on the guide camera, as such Autoguiders are able to use the variations of light falling on each pixel to calculate where the star should actually be located. As a result, most Autoguiders have s ...
... Why is Autoguiding better than manual guiding? Simply put the guide star illuminates more than one pixel on the guide camera, as such Autoguiders are able to use the variations of light falling on each pixel to calculate where the star should actually be located. As a result, most Autoguiders have s ...
Radio Astronomy
... 1932: Karl Jansky discovers cosmic radio waves from the galactic centre (USA) 1937-1944: Grote Reber’s First Surveys of the Radio Sky (USA) 1942: Sun discovered to be a radio source by J.S. Hey (UK) 1936-1945: Development of radar before and during world war II e.g. Sir Bernard Lovell 1944: Predicti ...
... 1932: Karl Jansky discovers cosmic radio waves from the galactic centre (USA) 1937-1944: Grote Reber’s First Surveys of the Radio Sky (USA) 1942: Sun discovered to be a radio source by J.S. Hey (UK) 1936-1945: Development of radar before and during world war II e.g. Sir Bernard Lovell 1944: Predicti ...
Ray Optics - Sakshi Education
... 1. Light is a form of energy which on striking the eye makes things visible (stimulates the sensation of vision). 2. A substance through which light can more or less pass is called optical medium. 3. A medium through which light can pass very easily is called transparent medium. 4. A medium through ...
... 1. Light is a form of energy which on striking the eye makes things visible (stimulates the sensation of vision). 2. A substance through which light can more or less pass is called optical medium. 3. A medium through which light can pass very easily is called transparent medium. 4. A medium through ...
Soft-x-ray laser interferometry of a plasma with a tabletop 420
... and is spatially coherent within a cone having a full angle of at least 0.5 mrad.13 We selected the distance between the laser and the plasma, ø2.4 m, to have a spatial-coherence length larger than 1.2 mm at the plasma location. We used a spherical mirror having a radius of curvature R 60 cm at ne ...
... and is spatially coherent within a cone having a full angle of at least 0.5 mrad.13 We selected the distance between the laser and the plasma, ø2.4 m, to have a spatial-coherence length larger than 1.2 mm at the plasma location. We used a spherical mirror having a radius of curvature R 60 cm at ne ...
Autostar Manual
... power eyepiece installed and the viewfinder aligned. Use MODE to return to the main menu (“Select Item:”). Chose the “Setup” menu and press ENTER. Press ENTER again to select the “Align” menu. Press ENTER a third time to begin the “Easy” Align procedure and follow the instructions given by Autostar. ...
... power eyepiece installed and the viewfinder aligned. Use MODE to return to the main menu (“Select Item:”). Chose the “Setup” menu and press ENTER. Press ENTER again to select the “Align” menu. Press ENTER a third time to begin the “Easy” Align procedure and follow the instructions given by Autostar. ...
Pupil Mapping (aka PIAA)
... Ideal Apodization with no aberrations Concentric Rings Pupil Mapping (2nd focus) ...
... Ideal Apodization with no aberrations Concentric Rings Pupil Mapping (2nd focus) ...
Final Presentation Slides (PowerPoint Version)
... • Create an alignment system that designed to detect small movements • Piezo actuator used to simulate the movements of MIRI • Piezo actuator’s movement is unknown • Calibrate it sufficiently becomes predictable and ...
... • Create an alignment system that designed to detect small movements • Piezo actuator used to simulate the movements of MIRI • Piezo actuator’s movement is unknown • Calibrate it sufficiently becomes predictable and ...
the spitzer space telescope mission
... black paint on the side that faces away from the Sun and is polished aluminum on the sides that face the thermal shields, solar array, and warm spacecraft components. The Spitzer warm launch design and the wide range of infrared wavelengths observed by the focal plane instruments require an open ape ...
... black paint on the side that faces away from the Sun and is polished aluminum on the sides that face the thermal shields, solar array, and warm spacecraft components. The Spitzer warm launch design and the wide range of infrared wavelengths observed by the focal plane instruments require an open ape ...
Reflecting telescope
A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a ""catoptric"" telescope.