We present an asymmetric condenser with an elliptical solid angle distribution and improves system efficiency of 15.5%. The proposed system on the DMD achieves the light efficiency of 63.4% and the average deviation o...
详细信息
ISBN:
(纸本)9780819496911
We present an asymmetric condenser with an elliptical solid angle distribution and improves system efficiency of 15.5%. The proposed system on the DMD achieves the light efficiency of 63.4% and the average deviation of 1.75%.
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 lensdesign. This paper presents ...
详细信息
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 lensdesign. 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 lensdesigns. 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 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...
详细信息
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.
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...
详细信息
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.
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...
详细信息
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.
The meniscus between two immiscible liquids can be used as an opticallens. A change in curvature of this meniscus by electrowetting leads to a change in focal distance. We demonstrate that two liquids in a tube form ...
详细信息
ISBN:
(纸本)0819454613
The meniscus between two immiscible liquids can be used as an opticallens. A change in curvature of this meniscus by electrowetting leads to a change in focal distance. We demonstrate that two liquids in a tube form a self-centered tunable lens of high optical quality. Several properties were studied, such as optical performance, electrical characteristics and dynamic behavior. We designed and constructed a miniature camera module based on this tunable lens and show that it is very well suited for use in portable applications.
Freeform optical shapes or optical surfaces that arc designed with non-symmetric features arc gaining popularity with lensdesigners and optical system integrators. Tolerances on a freeform opticaldesign influence th...
详细信息
ISBN:
(纸本)9781628417449
Freeform optical shapes or optical surfaces that arc designed with non-symmetric features arc gaining popularity with lensdesigners and optical system integrators. Tolerances on a freeform opticaldesign influence the optical fabrication process. Case studies and soft tolerance limits for easier fabrication will be discussed. This paper will also give a high level overview of a freeform optical fabrication process that includes generation. high speed VIBE polishing, sub-aperture figure correction and testing of freeform surfaces.
This paper provides a set of polarization aberration fields that are useful for understanding polarization aberrations in optical imaging systems. The aberration function of a plane symmetric system is used to build t...
详细信息
ISBN:
(纸本)9780819496911
This paper provides a set of polarization aberration fields that are useful for understanding polarization aberrations in optical imaging systems. The aberration function of a plane symmetric system is used to build the polarization fields. Polarization aberration coefficients for a system of spherical surfaces are also given.
The Fine Guidance Sensor (FGS) is part of the science instrumentation for the James Webb Space Telescope (JWST). The FGS is required to operate at 37 K and provide the data needed to facilitate fine pointing and attit...
详细信息
ISBN:
(纸本)9780819482822
The Fine Guidance Sensor (FGS) is part of the science instrumentation for the James Webb Space Telescope (JWST). The FGS is required to operate at 37 K and provide the data needed to facilitate fine pointing and attitude stabilization necessary to meet the requirements of the mission's science and engineering operations. We describe here the selection of the proper opticaldesign form to meet requirements and its relative merits. The FGS has progressed with the successful completion of several key design reviews. The opticaldesign of the current stage will be discussed here in detail.
Modern cine lenses require a high degree of aberration correction over a large and ever expanding image size. At low to medium volume production levels, these highly corrected designs also require a workable tolerance...
详细信息
ISBN:
(纸本)9781628417449
Modern cine lenses require a high degree of aberration correction over a large and ever expanding image size. At low to medium volume production levels, these highly corrected designs also require a workable tolerance set and compensation scheme for successful manufacture. In this paper we discuss the design and manufacture of cine lenses with reference to currentdesigns both internal and in the patent literature and some experience in design, tolerancing and manufacturing these lenses in medium volume production.
暂无评论