An investigation of material properties for a selection of chalcogenide glasses for precision glass molding

2012 ◽  
Author(s):  
William V. Moreshead ◽  
Jacklyn Novak ◽  
Alan Symmons
Keyword(s):  
Material Properties ◽  
Chalcogenide Glasses ◽  
Glass Molding ◽  
Precision Glass Molding ◽  
Selection Of

Index of refraction change in common chalcogenide glasses due to precision glass molding

2019 ◽  
Author(s):  
George P. Lindberg ◽  
John P. Deegan ◽  
Peter F. Wachtel ◽  
J. David Musgraves ◽  
Jamie L. Ramsey
Keyword(s):  
Chalcogenide Glasses ◽  
Index Of Refraction ◽  
Glass Molding ◽  
Precision Glass Molding

Annealed high-phosphorus electroless Ni–P coatings for producing molds for precision glass molding

2021 ◽  
Vol 262 ◽  
pp. 124297
Author(s):  
Qian Yu ◽  
Tianfeng Zhou ◽  
Yupeng He ◽  
Peng Liu ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Glass Molding ◽  
Precision Glass Molding ◽  
High Phosphorus ◽  
Electroless Ni

A new representation for a robot grasping quality measure

Robotica ◽  
1995 ◽  
Vol 13 (3) ◽  
pp. 287-295 ◽  
Author(s):  
Venugopal K. Varma ◽  
Uri Tasch
Keyword(s):  
Objective Function ◽  
Material Properties ◽  
Graphical Representation ◽  
Contact Forces ◽  
Geometric Constraints ◽  
Objective Functions ◽  
Finger Force ◽  
Finger Forces ◽  
Robot Grasping ◽  
Selection Of

SummaryWhen an object is held by a multi-fingered hand, the values of the contact forces can be multivalued. An objective function, when used in conjunction with the frictional and geometric constraints of the grasp, can however, give a unique set of finger force values. The selection of the objective function in determining the finger forces is dependent on the type of grasp required, the material properties of the object, and the limitations of the röbot fingers. In this paper several optimization functions are studied and their merits highlighted. The paper introduces a graphical representation of the finger force values and the objective functions that enable one to select and compare various grasping configurations. The impending motion of the object at different torque and finger force values are determined by observing the normalized coefficient of friction plots.

Multilevel micro-structuring of glassy carbon for precision glass molding of diffractive optical elements

2015 ◽  
Author(s):  
Karin Prater ◽  
Julia Dukwen ◽  
Toralf Scharf ◽  
Hans Peter Herzig ◽  
Sven Plöger ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Glass Molding ◽  
Precision Glass Molding ◽  
Micro Structuring

Wafer Level Glass Molding

2012 ◽  
Vol 523-524 ◽  
pp. 1001-1005 ◽  
Author(s):  
Martin Hünten ◽  
Daniel Hollstegge ◽  
Fritz Klocke
Keyword(s):  
Wafer Level ◽  
Molding Process ◽  
Optical Components ◽  
New Approach ◽  
Glass Molding ◽  
Wafer Scale ◽  
Precision Glass Molding

Manufacturing of micro optical components is approached with many different technologies. In this paper it is presented how the precision glass molding process is enabled to manufacture micro optical components made out of glass. In comparison to the existing glass molding technology the new approach aims for molding entire glass wafers including multiple micro optical components. It is explained which developments in the filed of simulation, mold manufacturing and molding were accomplished in order to enable the precision glass molding on wafer scale.

scholarly journals PtIr protective coating system for precision glass molding tools: Design, evaluation and mechanism of degradation

2020 ◽  
Vol 385 ◽  
pp. 125378 ◽  
Author(s):  
Marcel Friedrichs ◽  
Zirong Peng ◽  
Tim Grunwald ◽  
Michael Rohwerder ◽  
Baptiste Gault ◽  
...  
Keyword(s):  
Protective Coating ◽  
Design Evaluation ◽  
Coating System ◽  
Glass Molding ◽  
Precision Glass Molding ◽  
Mechanism Of Degradation

scholarly journals Pre-Compensation of Mold in Precision Glass Molding Based on Mathematical Analysis

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1069
Author(s):  
Yue Zhang ◽  
Kaiyuan You ◽  
Fengzhou Fang
Keyword(s):  
Mathematical Analysis ◽  
High Surface ◽  
Form Error ◽  
Fictive Temperature ◽  
Glass Molding ◽  
Precision Glass Molding ◽  
Compensation Factor ◽  
Expansion Curve ◽  
Glass Lenses ◽  
Main Factor

Precision glass molding is the most appropriate method for batch production of glass lenses with high surface accuracy and qualified optical performance. However, the form error caused by material expansion and contraction is the main factor affecting the precision of the molded lenses, thus the mold must be pre-compensated. In this paper, an effective method of mold pre-compensation based on mathematical analysis is established. Based on the thermal expansion curve of D-ZK3 glass, the freezing fictive temperature of the glass under the actual cooling rate is measured, and the mold pre-compensation factor can be quickly calculated. Experimental results show that the peak valley (PV) value of the surface form error of molded aspheric lens with an aperture of 5.3 mm is effectively reduced from 2.04 μm to 0.31 μm after the pre-compensation, thus meeting the geometric evaluation criterion.

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