We derive a closed-form expression for the entrance pupil of the on-axis stigmatic singlet lens, and discuss its performance for a variety of conditions, including positive or negative indices of refraction, and diffe...
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ISBN:
(数字)9781510637719
ISBN:
(纸本)9781510637719
We derive a closed-form expression for the entrance pupil of the on-axis stigmatic singlet lens, and discuss its performance for a variety of conditions, including positive or negative indices of refraction, and different positions of the object and the image.
This paper discusses some methodologies that apply to the opticaldesign of reflective wide-field cameras. Among the methods considered are off-axis and eccentric pupil systems, concatenation of systems, tilted compon...
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ISBN:
(纸本)9780819472809
This paper discusses some methodologies that apply to the opticaldesign of reflective wide-field cameras. Among the methods considered are off-axis and eccentric pupil systems, concatenation of systems, tilted component systems, aberration theory, and confocal systems. The goal of the paper is to review design methods. In particular some systems are shown to illustrate two methodologies.
Analysis of aberration performance of two-mirror Cassegrain lens allowed revealing an interesting relationship between them and the central obscuration coefficient epsilon and the distance delta of the focal plane fro...
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ISBN:
(纸本)0819445347
Analysis of aberration performance of two-mirror Cassegrain lens allowed revealing an interesting relationship between them and the central obscuration coefficient epsilon and the distance delta of the focal plane from the vertex of the primary mirror and introducing the coefficient of complexity of Cassegrain lens.
This paper describes our experience with global lens optimization using algorithms that can modify an existing lens construction in an optimal way or create an entirely new construction. The binary-search method assem...
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ISBN:
(纸本)9780819492036
This paper describes our experience with global lens optimization using algorithms that can modify an existing lens construction in an optimal way or create an entirely new construction. The binary-search method assembles lens elements according to the bits in a binary number, ensuring that all combinations of power are tested, while the saddle-point method can either add elements to a starting lens or start from scratch. The latter algorithm also naturally leads to a method of removing an element in an optimum way, which can sometimes simplify a lens with no loss of quality.
Dual field of view optical systems provide search, detect and observation abilities with wide and narrow field of views. These systems provide dual field of view by changing the effective focal length with moving a le...
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ISBN:
(纸本)9781510654198;9781510654181
Dual field of view optical systems provide search, detect and observation abilities with wide and narrow field of views. These systems provide dual field of view by changing the effective focal length with moving a lens or lens group mechanically to exact positions. In this paper, previously proposed methodology is used to change effective focal length without any mechanical movement. This methodology relies on ionization of fluid with voltage difference to change the refractive index which is patented in 2022.
We present details of opticaldesign, opto-mechanical design and testing of a visible-NIR imaging optical system for a Fourier transform spectrometer dedicated to astronomical application at the Mont Megantic Observat...
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ISBN:
(纸本)0819454613
We present details of opticaldesign, opto-mechanical design and testing of a visible-NIR imaging optical system for a Fourier transform spectrometer dedicated to astronomical application at the Mont Megantic Observatory (Observatoire du Mont Megantic, OMM, located south Quebec city, Canada). design considerations as well as testing and experimental results are presented.
An overview of optical systems utilized in JPL's optical Communications research is provided here. These include discussions on the flight terminal optics, the ground receiver aperture and the uplink beacon or com...
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ISBN:
(纸本)0819450464
An overview of optical systems utilized in JPL's optical Communications research is provided here. These include discussions on the flight terminal optics, the ground receiver aperture and the uplink beacon or command optical system. On-going efforts on these and beam-coupling techniques will be described.
Hybrid optics offer a valuable aberration correction tool for the lensdesigner. However, careful consideration must be given to the calculation of the optical performance during the design process, and to the practic...
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ISBN:
(纸本)0819441554
Hybrid optics offer a valuable aberration correction tool for the lensdesigner. However, careful consideration must be given to the calculation of the optical performance during the design process, and to the practical implementation of the elements if the potential benefits are to be realised in practice. optical performance can be accurately assessed by tracing multiple diffraction orders. It may be particularly important to utilise such a technique if, for example, the image-forming bundles sample a small number of diffractive zones. This situation is examined in detail.
In this paper, we propose and demonstrate a novel design to make color mixing and projection of RGB LEDs. The optical elements include a high reflective light pipe, a volume scattering diffuser and a TIR lens. The sys...
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ISBN:
(纸本)9780819482822
In this paper, we propose and demonstrate a novel design to make color mixing and projection of RGB LEDs. The optical elements include a high reflective light pipe, a volume scattering diffuser and a TIR lens. The system optical efficiency is around 46 % while the color is well mixing for the cases at the CCTs of 6500K, 4500K and 3000K.
Using the caustic merit function for plane waves incident upon a singlet lens, a comparison between the optical performance of the lens using an axial gradient index with spherical surfaces or aspheric surfaces with c...
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ISBN:
(纸本)0819415871
Using the caustic merit function for plane waves incident upon a singlet lens, a comparison between the optical performance of the lens using an axial gradient index with spherical surfaces or aspheric surfaces with constant index material has been investigated. Results indicate that the use of an inhomogeneous medium for the lens material is more effective in the controlling aberrations than the use of aspheric surfaces for a similar lens.
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