Real-time quantitative PCR technology has been an active filed since it has excellent performance of the ability of quantitative analysis for initial DNA template evaluation and detection on fluorescence signal. This paper basically pay attention on the features of system and optimize the original parts of the device. Using OLED as light source and nonlinear optics device in the light path to optimize the effect of the device. According to simulation results, the uniformity of the excitation in this device has a marked improvement. Furthermore, with the addition of the filed lens, the collection effect of the fluorescence would be better.
The performance of The Grating Exchange System can satisfy the Thirty Meter Telescope - TMT for astronomical observation WFOS index requirements and satisfy the requirement of accuracy in the grating exchange. It is used to install in the MOBIE and a key device of MOBIE. The Wide Field Optical Spectrograph (WFOS) is one of the three first-light observing capabilities selected by the TMT Science Advisory Committee. The Multi-Object Broadband Imaging Echellette (MOBIE) instrument design concept has been developed to address the WFOS requirements as described in the TMT Science-Based Requirements Document (SRD). The Grating Exchange System uses a new type of separate movement way of three grating devices and a mirror device. Three grating devices with a mirror are able to achieve independence movement. This kind of grating exchange system can effectively solve the problem that the volume of the grating change system is too large and that the installed space of MOBIE instruments is too limit. This system adopts the good stability, high precision of rotary stage – a kind of using air bearing (Air bearing is famous for its ultra-high precision, and can meet the optical accuracy requirement) and rotation positioning feedback gauge turntable to support grating device. And with a kind of device which can carry greater weight bracket fixed on the MOBIE instrument, with two sets of servo motor control rotary stage and the mirror device respectively. And we use the control program to realize the need of exercising of the grating device and the mirror device. Using the stress strain analysis software--SolidWorks for stress and strain analysis of this structure. And then checking the structure of the rationality and feasibility. And prove that this system can realize the positioning precision under different working conditions can meet the requirements of imaging optical grating diffraction efficiency and error by the calculation and optical performance analysis.
KEYWORDS: Thirty Meter Telescope, Atmospheric corrections, Telescopes, Prisms, Finite element methods, Earth's atmosphere, Space telescopes, Temperature metrology, Atmospheric optics, Refraction
The concepts of atmospheric refraction and atmospheric dispersion are introduced and the method of how to eliminate atmospheric dispersion. This article introduces the structure of Atmospheric Dispersion Correction , the installation position of ADC in TMT telescope and the introduction to the principle of ADC in detail. Using the finite element analysis software Ansys Workbench to analyze the rationality of the ADC structure. Static analysis The ADC structure is loaded with two tape lens, which is more 400kg in weight, as well as itself weight, will deform in x, y, z directions. Dynamic analysis The dynamic performances of ADC structure are very important for the construction of the instrument, for the environmental vibration need to be tested. That is the effect of ADC dynamic deformation on optical accuracy is crucial for imaging quality. Here three order modes of dynamic performance are presented for the references of ADC design. They are 1st order mode , 2nd order mode and 3rd order mode. Thermal deformation according to the ADC working environment temperature change, the instrument temperature would be from -5 to 9 degree. So the thermal deformation of ADC is performed in this temperature fluctuation. ADC structure FEA conclusions: The ADC tapered lens are assumed as a rigid body and the mechanical analysis results are: Static analysis, Kinetics analysis and Thermodynamic analysis. Based on the FEA results, we get the image motion information in the telescope plane. Then, we draw a conclusion that: image motions induced by current structure design are very small and meet the requirements of ADC.
In recent decades, multispectral imaging (MSI) has been approved as an effective tool to detect and discriminate targets in industrial application. A narrowband micro-arrayed multispectral filter mosaic (MSFM) based on MSI technology is proposed to miniaturize MSI instrumentation. There are many reasons to believe that this innovation is going to replace the traditional methods of filtering or dispersing light and bring MSI applications to more industrial fields. However, highly integrated micro pieces of MSFM are arranged periodically, and the spectral profiles of two adjacent pieces cause a spectral interference (SI). To express and estimate the extent of SI, an evaluation method is proposed and its feasibility is reported in this paper. Additionally, the ways reducing the extent of SI are suggested.
This study aims at the application of optical sensing technology in a 2D flexible hinge test stage.
Optical fiber sensor which is manufactured taking advantage of the various unique properties of optical fiber, such as
good electric insulation properties, resistance of electromagnetic disturbance, sparkless property and availability in
flammable and explosive environment, has lots of good properties, such as high accuracy and wide dynamic range,
repeatable, etc. and is applied in 2D flexible hinge stage driven by PZT. Several micro-bending structures are designed
utilizing the characteristics of the flexible hinge stage. And through experiments, the optimal micro-bending tooth
structure and the scope of displacement sensor trip under this optimal micro-bending tooth structure are derived. These
experiments demonstrate that the application of optical fiber displacement sensor in 2D flexible hinge stage driven by
PZT substantially broadens the dynamic testing range and improves the sensitivity of this apparatus. Driving accuracy
and positioning stability are enhanced as well. [1,2]
Spectrometer plays an important role, and is already an indispensable analytical instrumentation especially in biomedical,
chemical and other fields. Instrument miniaturization will expand its application areas. And miniaturization design for all
parts of optical path is the key to the whole task. This paper focuses on the research of the luminous source system
design used in broad-band (200nm~1100nm) spectrometer. Considering the source wave band, a combination of
deuterium lamp and tungsten lamp are chosen. According to the structure of the source, the main work concerns a
collecting agglutinate lens and an elliptical reflector which acts as a light coupler. The optical design and the overall
structure's optical path are simulated. On the basis of optical design and the selection as well as manufacture of the key
components, the light source optical system of the project was analyzed experimentally and the results are satisfactory.
A detecting system based on confocal microscopy, which is designed to implement reading the signal of a multilayer disk,
is introduced. The confocal readout signal, which is relevant to the polarization, the angle of incident beam, the
microstructure of the object, as well as the refractive index of the medium of the disk, is analyzed with vector theory, and
the numerical simulation of the analysis is given. In order to test the theoretical results, an experimental device is put up
and a two-layer disk is tested, the readout signals show that the experiments accord to theoretical analysis.
The surfaces of flexible printed circuit products are discontinuous, it is imperative to provide a non-contact measurement system to measure not only non-continuous surface, but also surface topography and small dimension. Optical detection system based on differential astigmatic can solve the problem. In the existing literature, the mathematic model of differential astigmatic optical system is established by Geometrical optics, it brings imprecision factors. So it is necessary to establish a precise mathematical model of differential astigmatic. This paper analyzes the shortcomings and inadequate of the mathematic model of differential astigmatic optical system which is based on geometrical optics of traditional optical systems, and then analyzes the model based on laser Gaussian beam model, which is more accurately closer to actual situation. Subsequently, according to the mathematic model, this paper optimizes the optical path parameters and also analyzes the impacts of position errors of optical components upon the measurement, which lays the foundation of the improvement of the online FPC quality control system.
Geometric measurements based on optical methods have been studied, and the capacitance sensor is applied
to detect the focusing displacement. In order to improve the edge effect of the flat capacitance sensor, an
equipotential ring is used. According to the Abbe principle, a double equipotential rings flat capacitance sensor
with a central hole is developed. The axis of the optical system perforates through the hole of the sensor, thus
avoiding the Abbe error. In order to get narrow gap between the equipotential ring and the electrode as well as
thin electrodes, MEMS technique is applied to machine the capacitance electrodes, then the gap between the
ring and the electrode can be no more than 10μm, meanwhile the measurement accuracy can be promoted
greatly. This paper emphasizes on the design of structure flat capacitance sensor and the manufacture of
double rings capacitor with MEMS technique. After completing the circuit and finishing the experiment for
testing the sensor, it can make further qualitative analysis on the result of the linearity and the sensitivity.
A fiber optical probe which is a non-contact, type and highly accurate, and small sized is designed in this paper to detect some holes which are only several millimeters and must be under monitor. Based on Gauss transferring theory, the mode matching principle and matrix optical theory, the effect of the structure of the optical fiber and lens connection is studied. Then the confocal speciality between optical fiber and GRIN lens is also studied based on a fiber optical confocal scanning microscopy (FOCSM). The coupling structure which can get maximal coupling efficiency is designed. Results of preliminary experiments are presented finally.
Although PZT driving stage is a practical and widely used component in optical scanning measurement, its creep, hysteresis, poor long-term stability and the vibration of stage hindered the promotion in driving and positioning accuracy. Based on feedback control, the stage can have nanometer level driving accuracy. For attaching the displacement feedback sensor, a special structure that is called expanded hinge is designed. For getting higher sensitivity, a shallow groove is cut in it. In order to confirm the effect of the additional structure on the performance of the stage, the finite element software is employed, the analysis had been completed, and the simulated results are presented. With the vibration model of the 2D flexible hinge stage, the mathematic model of the vibration control can be achieved, and the PID control system is set up. After the sensors are carefully attached to the corresponding spot and the processing circuit is completed, the simulation and test of the overall performance of the stage can be executed.
Micro-motion stage is a key component in micro-nanometer manufacture and measurement. Lots of stages based on
different principles had been developed recent years. Among these stages, the PZT driving one centered these
applications. Although PZT driving flexible hinge stage is now being used widely, the driving precision as well as the
long term positioning stability is a hard nut to deal, which is the key technique in this field. And also lots of scholars are
being engaged in seeking solutions to this problem. In our project, based on the original basic structure, a fiber optical
sensor is added to the stage, the structure for sensor installment is designed. The sensor is pre-bended to critical status,
which is linear and sensitive to micro deformation so as to fulfill ultra precise driving and positioning demand. For
obtaining further higher sensitivity, a serial structure that forms a comb shape is applied. The performance of the sensor
is experimentally studied after the optical system and the processing circuits are completed, and the results that the
sensor can meet the demands of the driving precision and the positioning stability are presented.
In the Production of FPC Products, the quality control, which affects the efficiency of the FPC production, is the hard nut to deal. FPC detection consists of the measurement of surface quality, step height and the space of the line. The measurement of the surface quality is incompatible with the dimension measurement. The optical system, which is based on the differential astigmatic measurement, can measure the smooth surface as well as the discontinuous surface, is presented in this paper. The system is tested with resolution of 5nm in roughness measurement, and 50nm in small dimension measurement.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.