Specific developments in optical technology over the past thirty years including refractive materials, thin film coatings and surface profiles will be discussed. A large variety of opticaldesigns which depend on some...
详细信息
In this article the emergence, development and present of depolarizer has been studied by me. Then I have studied the all quartz depolarizers existing presently. Such as single plate depolarizer, loyt depolarizer, sin...
详细信息
ISBN:
(纸本)0819409251
In this article the emergence, development and present of depolarizer has been studied by me. Then I have studied the all quartz depolarizers existing presently. Such as single plate depolarizer, loyt depolarizer, single wedge depolarizer, right angle prism depolarizer, J.C. kremen double wedges depolarizer by theoretical analysis and experiment measurements. I have found when the polarization plane of the incident monochromatic light is unknown or frequently varies, the emergent light can not be depolarized completely by using all the existing depolarizers. According to this situation, I have invented a new type of double wedge depolarizer. I can depolarize the emergent light completely whether the polarization plane of the incident is known or frequently varies by using the new depolarizer. The polarization degree of the emergent light is below 1.0%, transmission ratio is above 90%.
作者：
Thibault, SINO
Opt Engn Div St Foy PQ G1P 4S4 Canada
Introducing the desired amount of distortion in an optical system is possible and relatively straight forward for opticaldesigner. Known f-theta lenses used in laser scanner system is one of the most popular lenses o...
详细信息
ISBN:
(纸本)0819441554
Introducing the desired amount of distortion in an optical system is possible and relatively straight forward for opticaldesigner. Known f-theta lenses used in laser scanner system is one of the most popular lenses of this type. With the development of DWDM system, compact spectrometer and various grating based devices, the interest in solving optical problems with innovative opticaldesign has been a revival. On the other hand, it is possible to simplify considerably the task of the software by designing more sophisticated optical element. The F-sin(theta) lens is such a device which can be used in various grating based devices to improve the performance. This optical device is intended to provide a new lens or lens group which can be used with a diffraction grating to provide a linear output plane with the wavelength (lambda), but also with the order of diffraction (m), or with the grating spatial frequency, or with the inverse of the index of refraction (l/n). Based on theoretical consideration, we calculated which amount of distortion is desired to get linear output plane for a grating based device. We present singlet. achromatic doublet and mirror having this characteristic. These F-sin(theta) lenses present satisfactory distortion charateristic and have an improved correction for the curvature of image plane. F-sin(theta) lens will be also name F-lambda lens.
In 2003, NASA is planning to send two robotic rover vehicles to explore the surface of Mars. The spacecraft will land on airbags in different, carefully chosen locations. The search for evidence indicating conditions ...
详细信息
ISBN:
(纸本)0819441554
In 2003, NASA is planning to send two robotic rover vehicles to explore the surface of Mars. The spacecraft will land on airbags in different, carefully chosen locations. The search for evidence indicating conditions favorable for past or present life will be a high priority. Each rover will carry a total of ten cameras of five various types. There will be a stereo pair of color panoramic cameras, a stereo pair of wide-field navigation cameras, one close-up camera on a movable arm, two stereo pairs of fisheye cameras for hazard avoidance, and one Sun sensor camera. This paper discusses the lenses for these cameras. Included are the specifications, design approaches, expected optical performances. prescriptions, and tolerances.
An analysis of the measuring accuracy that can be obtained using critical angle refractometry as a direct and an indirect method is made. The working conditions required to get the highest accuracy are discussed.
ISBN:
(纸本)0819406554
An analysis of the measuring accuracy that can be obtained using critical angle refractometry as a direct and an indirect method is made. The working conditions required to get the highest accuracy are discussed.
In this paper we discuss the design of Diffractive optical Elements that can be used for optical interconnections. Q uite general computer programs have been realized for the design and the validation of such optical ...
详细信息
ISBN:
(纸本)0819415871
In this paper we discuss the design of Diffractive optical Elements that can be used for optical interconnections. Q uite general computer programs have been realized for the design and the validation of such optical elements. As examples, in the paper we discuss the design of a 1 to 3, a 1 to 5 and a 1 to 4 interconnections, workingeither in reflection or in transmission.
Geometric parameters such as fill-factor, pixel shape, and array symmetry strongly affect the performance of membrane light modulators. A set of modeling tools that allow device performance evaluation as a function of...
详细信息
ISBN:
(纸本)0819406554
Geometric parameters such as fill-factor, pixel shape, and array symmetry strongly affect the performance of membrane light modulators. A set of modeling tools that allow device performance evaluation as a function of these parameters have been developed. The models predict the effect of varying a given parameter and allow visualization of the result. The current modeling results are in good agreement with experimental observation and have formed the basis for computer-aided design of future generations of such devices.
Mathematical expressions are presented to relate object and image plane tilts in nonaxially symmetric systems. Examples that illustrate the use of these expressions are given. Keystone distortion is described and quan...
详细信息
ISBN:
(纸本)0819406554
Mathematical expressions are presented to relate object and image plane tilts in nonaxially symmetric systems. Examples that illustrate the use of these expressions are given. Keystone distortion is described and quantified as a function of image plane tilt.
The chronological events associated with fabricating a lens system from initial design to final component manufacturing will be explored. The benefits of utilizing computer integration in design, process planning and ...
详细信息
ISBN:
(纸本)0819402044
The chronological events associated with fabricating a lens system from initial design to final component manufacturing will be explored. The benefits of utilizing computer integration in design, process planning and manufacturing will be highlighted.
暂无评论