Wavefront error budget and optical manufacturing tolerance analysis for 1.8m telescope system

2010 ◽  
Author(s):  
Kai Wei ◽  
Xuejun Zhang ◽  
Hao Xian ◽  
Changhui Rao ◽  
Yudong Zhang
Keyword(s):  
Tolerance Analysis ◽  
Error Budget ◽  
Manufacturing Tolerance ◽  
Wavefront Error ◽  
Optical Manufacturing ◽  
Telescope System

Optical engineering requirements for the LISA wavefront error budget

1998 ◽  
Author(s):  
Martin Caldwell ◽  
Paul McNamara ◽  
Anna Glennmar
Keyword(s):  
Error Budget ◽  
Optical Engineering ◽  
Wavefront Error

scholarly journals Optical Design of the Goaly3 Multi-Mirror Telescope System with a Wide Field of View

2021 ◽  
Vol 11 (3) ◽  
pp. 1200
Author(s):  
Junliu Fan ◽  
Quanying Wu ◽  
Baohua Chen ◽  
Lin Liu ◽  
Lei Chen
Keyword(s):  
Fill Factor ◽  
Optical Design ◽  
Tolerance Analysis ◽  
Field Of View ◽  
Wide Field ◽  
Aspheric Surfaces ◽  
The Monte Carlo Method ◽  
Wide Field Of View ◽  
Mirror Telescope ◽  
Telescope System

A Golay3 multi-mirror telescope (MMT) system is designed in this paper. The fill factor of the Golay3 MMT is derived from the angular resolution of the telescope. An initial configuration is established according to the paraxial optical theory. A three-element aspheric corrector group is designed and placed in the converging light cone to enlarge the field of view (FOV) of the Golay3 MMT. The tolerance analysis for each surface of the Golay3 MMT is conducted using the Monte Carlo method. The design results show the FOV of the Golay3 MMT system can be increased to 1.5° with the insertion of a three-element aspheric corrector group. The results of the tolerance analysis indicate that most tolerances are loose, while some decenter tolerances relating with the aspheric surfaces are relatively tight, but still within an acceptable range.

scholarly journals Optimal F-Number of Ritchey–Chrétien Telescope Based on Tolerance Analysis of Mirror Components

2020 ◽  
Vol 10 (15) ◽  
pp. 5038
Author(s):  
Sheng-Feng Lin ◽  
Cheng-Huan Chen ◽  
Yi-Kai Huang
Keyword(s):  
System Parameter ◽  
Tolerance Analysis ◽  
Alignment Error ◽  
Mean Square ◽  
Random Surface ◽  
Secondary Mirror ◽  
Optical Module ◽  
Wavefront Error ◽  
Allowable Range ◽  
In The Beginning

The Ritchey–Chrétien telescope has been the key optical module for remote sensing instruments (RSI), in which the root mean square (RMS) random surface wavefront error and the alignment error of the primary and the secondary mirror takes the highest weighting in the tolerance analysis for the fabrication and assembly of the telescope. Therefore, the higher tolerance of those items becomes preferable for higher efficiency of RSI manufacturing. In this paper, the correlation between those tolerance items and the f-number of the telescope has been investigated. Although the f-number is normally a system parameter well specified in the beginning of the design process, it is not very rigid in practice and has a certain amount of allowable range. The optimal f-number can then be chosen based on the consideration of those key tolerance items. The proposed concept can be generalized as a novel methodology of design for tolerance.

scholarly journals Design of a High-Performance Digital Slit-Lamp Microscope with Five-Switched Zoom

2020 ◽  
Vol 10 (8) ◽  
pp. 2757 ◽  
Author(s):  
Youping Huang ◽  
Xiaogang Chen ◽  
Hao Zhang ◽  
Shuyan Huang ◽  
Feng Lin
Keyword(s):  
Optical System ◽  
Modulation Transfer Function ◽  
High Performance ◽  
Tolerance Analysis ◽  
Slit Lamp ◽  
Modulation Transfer ◽  
Coaxial System ◽  
Progressive Optimization ◽  
Telescope System ◽  
Quality Imaging

In this study, we design and present a five-fold digital slit-lamp microscope (DSLM) with built-in photographic lens and CCD. The initial structures of the front objective, Galilean telescope system, and photographic lens are systematically investigated and discussed in the design. A progressive optimization process is employed in the non-coaxial system design after the coaxial system achieves high performance. The analysis of spot diagrams and the modulation transfer function (MTF) show that this DSLM optical system achieves quasi-diffraction-limited performance and enables high-quality imaging for ophthalmic examination. Furthermore, tolerance analysis of this optical system is also performed, which provides a theoretical basis for machining and assembly. This design provides an idea for the design of a digital-zoom microscope in biomedical imaging instruments.

Tolerance Analysis for Validating Manufacturing Process Plans

2014 ◽  
Author(s):  
Wentao Fu ◽  
Saigopal Nelaturi ◽  
Arvind Rangarajan ◽  
Tolga Kurtoglu
Keyword(s):  
Process Planning ◽  
Manufacturing Process ◽  
Degrees Of Freedom ◽  
Tolerance Analysis ◽  
Manufacturing Tolerance ◽  
Process Plans ◽  
Novel Approach ◽  
Manufacturing Process Planning ◽  
Design And Manufacturing ◽  
Engineering Constraints

In manufacturing process planning, it is critical to ensure that the part generated from a process plan complies with tolerances specified by designers to meet engineering constraints. Manufacturing errors are stochastic in nature and are introduced at almost every stage of executing a plan, for example due to inaccuracy of tooling, misalignment of location, distortion of clamping etc. Furthermore, these errors accumulate or ‘stack-up’ as the manufacturing process progresses to inevitably produce a part that varies from the designed model. The resultant variation should be within prescribed design tolerances. In this work, we present a novel approach for validating process plans using 3D tolerance stack-up analysis by representing variations of nominal features in terms of extents of their degrees of freedom within design and manufacturing tolerance zones. We will show how the manufacturing error stack-up can be effectively represented by composition and intersection of these transformations. We demonstrate several examples with different tolerance specifications to show the applicability of our approach for process planning.

Manufacturing Tolerance Analysis of a Robot Manipulator’s Joint Axis Orientation Employing Single Monte-Carlo Simulation

2006 ◽  
Author(s):  
Dong Hwan Choi ◽  
Hong Hee Yoo
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Robot Manipulator ◽  
Computing Time ◽  
Tolerance Analysis ◽  
Manufacturing Cost ◽  
Axis Orientation ◽  
Manufacturing Tolerance ◽  
Design Engineers ◽  
Joint Axis

The operation error of a robot manipulator that occurs inevitably due to the manufacturing tolerance needs to be controlled within a certain range to achieve proper performance. The reduction of manufacturing tolerance, however, increases the manufacturing cost in return. Therefore, system design engineers try to solve the problem of maximizing the tolerance to reduce the manufacturing cost while minimizing the operation error to satisfy the performance requirement. In the present study, a revolute joint model considering the variation of joint axis orientation due to joint clearance is employed to perform a tolerance analysis of the robot manipulator operation. This paper presents a hybrid method which employs the sensitivity-based analytic method and the single Monte-Carlo simulation. The proposed method provides rapid implementation and the accurate statistical properties using the only single integration or single iteration for one sample set, whereas the Monte-Carlo method necessitates integrations as the number of samples and cases. Significant reduction of computing time can be achieved with the proposed method. The present method is especially effective if sensitivity information is hard to be obtained for the analysis.

A method of tolerance analysis for wavefront error of lithographic projection lens

2014 ◽  
Vol 40 (4) ◽  
pp. 289-294
Author(s):  
符媛英 FU Yuanying ◽  
李艳秋 LI Yanqiu ◽  
刘晓林 LIU Xiaolin ◽  
曹振 CAO Zhen ◽  
刘克 LIU Ke
Keyword(s):  
Tolerance Analysis ◽  
Projection Lens ◽  
Wavefront Error
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