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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Due to increasing environmental limitations on the use of certain raw materials used to make optical glasses, there is now an economic desire to minimize the number of glasses used in lens design. This paper presents ...
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ISBN:
(纸本)0819415871
Due to increasing environmental limitations on the use of certain raw materials used to make optical glasses, there is now an economic desire to minimize the number of glasses used in lens design. This paper presents the results of a study to create a suggested universal catalogue that contains the minimum number of glasses needed to satisfy most possible lens designs. A nearly symmetric double Gauss lens is used in the glass selection process. As part of this study, the relationship between the error function and the number of glasses chosen is studied, and in addition, a glass range study is also carried out. Three different lens libraries were studied using the global optimization method and the most frequently chosen glasses were then compiled into the suggested universal glass catalogue. A suggested universal glass catalogue constructed from this study is presented.
We proposed an all-optical bistable unit made of a Faraday medium and investigated theoretically its unique characteristics. optical bistability in our proposed unit was experimantally confirmed. In this paper, using ...
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The optomechanical engineering for mounting lenses and mirrors in imaging systems is frequently driven by the pointing or jitter requirements for the system. A simple set of rules was developed that allow the engineer...
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ISBN:
(纸本)0819463671
The optomechanical engineering for mounting lenses and mirrors in imaging systems is frequently driven by the pointing or jitter requirements for the system. A simple set of rules was developed that allow the engineer to quickly determine the coupling between motion of an optical element and a change in the system line of sight. Examples are shown for cases of lenses, mirrors, and optical subsystems. The derivation of the stationary point for rotation is also provided. Small rotation of the system about this point does not cause image motion.
The opticaldesign of a breadboard high resolution infrared spectrometer for the IRS instrument on the SIRTF mission is discussed. The spectrometer uses a crossed echelle grating configuration to cover the spectral re...
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ISBN:
(纸本)0819422517
The opticaldesign of a breadboard high resolution infrared spectrometer for the IRS instrument on the SIRTF mission is discussed. The spectrometer uses a crossed echelle grating configuration to cover the spectral region from 10 to 20 mu m with a resolving power of approximate to 600. The all reflective spectrometer forms a nearly diffraction limited image of the two dimensional spectrum on a 128 x 128 arsenic doped silicon area array with 75 mu m pixels. The design aspects discussed include, grating numerology, image quality, packaging and alignment philosophy.
The OPTECAL testbed has been fabricated for the purposes of developing and evaluating control algorithms for active, closed loop control of optical systems. The testbed has the capacity for controlling up to 84 degree...
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A diffraction grating rhomb is an excellent candidate for both suppressing sideband instabilities in a free electron laser (FEL) and outcoupling the optical beam. A rhomb incorporating sinusoidal profile gratings exhi...
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Our work is focused on the problem of a theoretical analysis of imaging properties and an initial opticaldesign of a three-element zoom optical system for laser beam expanders using lenses with a tunable focal length...
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ISBN:
(纸本)9781628417449
Our work is focused on the problem of a theoretical analysis of imaging properties and an initial opticaldesign of a three-element zoom optical system for laser beam expanders using lenses with a tunable focal length. Equations that enable to calculate basic paraxial properties and parameters of such optical systems are derived Finally, the derived equations are applied on an example of calculation of parameters of the three-element zoom system for the laser beam expander.
The integration of diffractive optical elements (DOE) into an opticaldesign opens up new possibilities for applications in sensing and illumination. If the resulting optics is used in a larger spectral range we must ...
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ISBN:
(纸本)9781628412192
The integration of diffractive optical elements (DOE) into an opticaldesign opens up new possibilities for applications in sensing and illumination. If the resulting optics is used in a larger spectral range we must correct not only the chromatic error of the conventional, refractive, part of the design but also of the DOE. We present a simple but effective strategy to select substrates which allow the minimum etch depths for the DOEs. The selection depends on both the refractive index and the dispersion.
optical elements which are made out of macro gradient refractive material are represented by lines, as opposed to points, on the glass map (nd Vs. vd diagram). Thus, opticaldesigners need account for gradient dispers...
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ISBN:
(纸本)0819415871
optical elements which are made out of macro gradient refractive material are represented by lines, as opposed to points, on the glass map (nd Vs. vd diagram). Thus, opticaldesigners need account for gradient dispersion as well as gradient index. A dispersion model for the material must be readily available and opticaldesign programs must be capable of defining and maintaining this relationship before and during optimization, simplifying user input and confining the material to walk a well defined path on the glass map. Thinking in terms of lines on the glass map for arbitrary glass families yields a simple dispersion model based on least squares fitting of Buchdahl coefficients. This paper introduces the concept of glass lines and outlines a technique to construct a dispersion model for any contiguous family of gradient refractive material.
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