Results 41 to 50 of about 2,359,536 (201)

Tolerance analysis of involute spur gear from the perspective of design

open access: yesMechanics & Industry, 2022
The existing gears’ tolerance standards are formulated from the point of view of manufacturing and measurement. Tolerance categories are numerous. What is more, they have no correlation with each other.
Chen Hua, Li Xin
doaj   +1 more source

Form Accuracy Analysis of Cylindrical Parts Produced by Rapid Prototyping [PDF]

open access: yes, 2007
Solid Freeform fabrication processes are being considered for creating fit and assembly nature functional parts. It is extremely important that these parts are within allowable dimensional and geometric tolerance.
Anjikar, Swapnil D.   +2 more
core   +1 more source

Wide Field of View Under-Panel Optical Lens Design for Fingerprint Recognition of Smartphone

open access: yesMicromachines
Fingerprint recognition is a widely used biometric authentication method in LED-backlight smartphones. Due to the increasing demand for full-screen smartphones, under-display fingerprint recognition has become a popular trend. In this paper, we propose a
Cheng-Mu Tsai   +3 more
doaj   +1 more source

Tolerance Modeling and Analysis Considering Form Defects for Spaceborne Array Antenna

open access: yesApplied Sciences, 2020
Tolerance analysis is becoming increasingly important for tolerance design and optimization. When dealing with electromechanical products such as the array antenna, the form errors of the assembly must be considered.
Guodong Sa   +3 more
doaj   +1 more source

Optical Design of a Miniaturized 10× Periscope Zoom Lens for Smartphones

open access: yesMicromachines, 2023
The size of the optical zoom system is important in smartphone camera design, especially as it governs the thickness of the smartphone. We present the optical design of a miniaturized 10× periscope zoom lens for smartphones.
Wen-Shing Sun   +2 more
doaj   +1 more source

Half a century of research on diatoms in athalassic habitats in central Poland [PDF]

open access: yes, 2015
The authors would like to dedicate this paper to Prof. Marcin Pliński who started the phycological research in these unique habitats of Central Poland.Part of the geology in the Łódź province was formed during the Upper Permian period when rich ...
Nowicka-Krawczyk, Paulina   +2 more
core   +1 more source

Robust Design of an Optical Micromachine for an Ophthalmic Application

open access: yesMicromachines, 2016
This article describes an approach to the robust design of an optical micromachine consisting of a freeform optics, an amplification linkage, and an actuator.
Ingo Sieber   +2 more
doaj   +1 more source

COMPARISON AND EVALUATION OF CLASSICAL METHODS OF DIMENSIONAL CHAINS THEORY AND THEIR MODERN ANALOGUES

open access: yesJournal of Engineering Science (Chişinău), 2023
The requirements for the quality, reliability, and cost-effectiveness of engineering products and engineering production itself are constantly improving.
LEALIN, Stanislav
doaj   +1 more source

Manufacturing Signature for Tolerance Analysis

open access: yesJournal of Computing and Information Science in Engineering, 2015
Every manufacturing process leaves on the surface a signature, i.e., a systematic pattern that characterizes all the features machined with that process. The present work investigates the effects of considering the manufacturing signature in solving a tolerance stack-up function.
POLINI, Wilma, Moroni G.
openaire   +1 more source

A Novel Focal Length Measurement Method for Center-Obstructed Omni-Directional Reflective Optical Systems

open access: yesApplied Sciences, 2019
An omni-directional optical system can be used as a surveillance camera owing to its wide field angle. In cases in which a system is designed with a central screen obscuring structure to increase the resolution of the off-axis field, however, the ...
Hojong Choi, Joo-Youn Jo, Jae-Myung Ryu
doaj   +1 more source

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