Steward Observatory is building a deformable f/15 secondary mirror that will compensate for atmospheric turbulence for the 6.5 m Multiple Mirror Telescope conversion. Withthe proposed adaptive optics system, this new...
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ISBN:
(纸本)0819432652
Steward Observatory is building a deformable f/15 secondary mirror that will compensate for atmospheric turbulence for the 6.5 m Multiple Mirror Telescope conversion. Withthe proposed adaptive optics system, this new telescope is expected to resolve diffraction limited images (greater than 80% Strehl ratio at 2.2 mu m), approximately an order of magnitude better than present seeing. this improved visibility with a larger fight collecting area and low thermal background requires a new science instrument, diffraction limited for the 1 to 5 mu m region. this science instrument, presently in its early manufacturing stages, consists of four cameras (optimized for plate scales from 0.019 arcsec/pixel to 0.102 arcsec/pixel), low resolution spectroscopy with grisms (lambda/Delta lambda from 250 to 500), high resolution spectroscopy with a cross-dispersed Echelle grating (lambda/Delta lambda from 3,000 to 60,000) and an atmospheric dispersion corrector. the cameras will provide simultaneous slit viewing, differential imaging and two pixel sampling over the full wavelength band. Each camera will operate with a 1024x1024 HgCdTe array optimized for the spectral region of the camera. An infrared tip/tilt sensor is also incorporated into the instrument that will relay natural guide star motion to the adaptive secondary in a closed-loop approach. this paper is an opticaldesign instrument overview.
In this paper we describe the design of a reflective / diffractive hybrid optical system, which features no obscuration, re-imagining system with 100% cold shield efficiency, 4 degrees of field of view, near diffracti...
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ISBN:
(纸本)0819428841
In this paper we describe the design of a reflective / diffractive hybrid optical system, which features no obscuration, re-imagining system with 100% cold shield efficiency, 4 degrees of field of view, near diffraction limited imaging quality, and working in the long wavelength infrared (LWIR) region of 8-12 microns.
Two opticaldesigns for marine beacon based on Direct In-line Package (DIP) LED is proposed and demonstrated. the luminous intensity of the marine beacon using DIP LED can achieve to the IALA recommendation's requ...
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ISBN:
(数字)9781510620629
ISBN:
(纸本)9781510620629
Two opticaldesigns for marine beacon based on Direct In-line Package (DIP) LED is proposed and demonstrated. the luminous intensity of the marine beacon using DIP LED can achieve to the IALA recommendation's requirement of 5 nautical miles. the measurement of color coordinates can also fit the IALA recommendation's requirement. By the surface-structured TIR lens, we successfully keep the divergence angle to 68 degrees in the horizontal direction and converge to 8 degrees in the vertical direction.
In this paper, we analyze and improve a modern structure opticaldesign for an ultrafast all-optical half adder. this design is based on four wave mixing (FWM) in a semiconductor optical amplifier (SOA), with polariza...
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An optically passive athermal infrared optical system working in the 8 - 12 micron long wavelength infrared band was designed by using a special infrared optical material AMTIR (amorphous material transmitting infrare...
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ISBN:
(纸本)9780819472809
An optically passive athermal infrared optical system working in the 8 - 12 micron long wavelength infrared band was designed by using a special infrared optical material AMTIR (amorphous material transmitting infrared radiation). the design principle, design results are described in this paper. In addition, the optical system was incorporated with an infrared focal plane array forming an infrared camera. the thermal test of imaging quality of this camera is also presented
Presents the results of the opticaldesign of lens objectives for polarization light microscopes, including to ensure that the special techniques. Sometimes such methods require the use of objectives similar magnifica...
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ISBN:
(数字)9781510620629
ISBN:
(纸本)9781510620629
Presents the results of the opticaldesign of lens objectives for polarization light microscopes, including to ensure that the special techniques. Sometimes such methods require the use of objectives similar magnifications in air and in immersion;with iris aperture diaphragm.
In this paper, we present a new fisheye projection lens for 8 perforation 70 mm format film. the lens has an aperture of F/2.4 and a total field of view of 163 degree(s). We discuss design considerations, and compare ...
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ISBN:
(纸本)081941249X
In this paper, we present a new fisheye projection lens for 8 perforation 70 mm format film. the lens has an aperture of F/2.4 and a total field of view of 163 degree(s). We discuss design considerations, and compare predicted with measured performance data.
A method of investigation of the optical properties of anisotropic materials using modulation of tho light polarization is presented. Measuring set-up was constructed and used to examine tho optical properties of inte...
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this paper presents a methodology for designing an athermalised dual field of view zoom lens in long wave infrared (8 mu m - 12 mu m) spectral band by using the benefits of paraxial optics. By using this design method...
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ISBN:
(数字)9781510602861
ISBN:
(纸本)9781510602854;9781510602861
this paper presents a methodology for designing an athermalised dual field of view zoom lens in long wave infrared (8 mu m - 12 mu m) spectral band by using the benefits of paraxial optics. By using this design methodology the opticaldesigner can develop many types of complex optical systems in a straightforward way. the key feature of this design methodology relies on utilization of paraxial optics for defining the initial positions of the optical elements. the opticaldesign is based on moving a single lens for changing the optical system's FOV thereby reducing the number of moving parts and simplifying the assembly procedure of the system. the opticaldesign begins with optimization process using paraxial optics. then the opticaldesign using paraxial optics is used as a template for designing the final optical system by lens material selection for compensating the shift in system's focus due to thermal effects and lens thickness tuning.
Experiments such as CHORUS at CERN require the inspection of a large amount of nuclear emulsion plates exposed to particle beams. Rare events need to be found, measured and analysed. their features are stored as grain...
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ISBN:
(纸本)0819432652
Experiments such as CHORUS at CERN require the inspection of a large amount of nuclear emulsion plates exposed to particle beams. Rare events need to be found, measured and analysed. their features are stored as grains in microscopic dimensions in a three-dimensional stack of plates. A new, fully automatic immersion microscope system was developed for this purpose. It features high resolution, small depth of focus, large working distance, large field of view and synchronization of illumination and detector. An additional requirement is given by variations in the refraction index and in the relative thickness of immersion oil and emulsion. the approach used here is an imaging system based on a vario objective lens (variable oil immersion) with extreme numerical aperture, large working distance and wide field, combined with a matched high-aperture Koehler illuminator. the light source is a mercury are lamp, combined with a filter package for the g-line. It includes liquid crystal elements for synchronized shuttering and variable attenuation. the theoretical resolution is less than 1 micron in x, y, z within a volume of 0.5mm diameter (x, y) times 1 mm scanning depth (z) in all situations within a predefined index range (1.49 to 1.54). three identical pieces of the system have been built. the experimentally measured resolution confirms the expectations and is better than 1 micron in all three dimensions. this is the result of a complex process of system design and manufacturing, unifying optical, opto-mechanical and optoelectronical contributions. this process spans from the early stages of feasibility and manufacturing up to the test and adjustment procedures. the three prototypes are operational since the fall of 1998 in the frame of the CHORUS project. Practical experience and application results are presented.
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