scholarly journals An Areal Isotropic Spline Filter for Surface Metrology

2015 ◽  
Vol 120 ◽  
pp. 64 ◽  
Author(s):  
Hao Zhang ◽  
Mingsi Tong ◽  
Wei Chu
Keyword(s):  
Surface Metrology ◽  
Spline Filter

A universal spline filter for surface metrology

Measurement ◽  
2010 ◽  
Vol 43 (10) ◽  
pp. 1575-1582 ◽  
Author(s):  
Hao Zhang ◽  
Yibao Yuan ◽  
Weiying Piao
Keyword(s):  
Surface Metrology ◽  
Spline Filter

High-order spline filter: Design and application to surface metrology

2015 ◽  
Vol 40 ◽  
pp. 74-80 ◽  
Author(s):  
Hao Zhang ◽  
Yibao Yuan ◽  
Jin Hua ◽  
Yuzhu Cheng
Keyword(s):  
Filter Design ◽  
High Order ◽  
Surface Metrology ◽  
Order Spline ◽  
Spline Filter ◽  
Design And Application

Research progress of high-precision surface metrology of a K-B mirror

2020 ◽  
Vol 13 (4) ◽  
pp. 660-675
Author(s):  
ZHANG Shuai ◽  
◽  
◽  
HOU Xi ◽  
◽  
...  
Keyword(s):  
High Precision ◽  
Research Progress ◽  
Surface Metrology

scholarly journals Nano-imprinted subwavelength gratings as polarizing beamsplitters

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Julian Wüster ◽  
Yannick Bourgin ◽  
Patrick Feßer ◽  
Arne Behrens ◽  
Stefan Sinzinger
Keyword(s):  
Nanoimprint Lithography ◽  
Optical Measurement ◽  
Design Method ◽  
Optical Systems ◽  
Surface Metrology ◽  
Measurement Systems ◽  
Common Path ◽  
Dielectric Coatings ◽  
Subwavelength Gratings ◽  
Wide Range

AbstractPolarizing beamsplitters have numerous applications in optical systems, such as systems for freeform surface metrology. They are classically manufactured from birefringent materials or with stacks of dielectric coatings. We present a binary subwavelength-structured form-birefringent diffraction grating, which acts as a polarizing beamsplitter for a wide range of incidence angles −30∘…+30∘. We refine the general design method for such hybrid gratings. We furthermore demonstrate the manufacturing steps with Soft-UV-Nanoimprint-Lithography, as well as the experimental verification, that the structure reliably acts as a polarizing beamsplitter. The experimental results show a contrast in efficiency for TE- and TM-polarization of up to 1:18 in the first order, and 34:1 in the zeroth order. The grating potentially enables us to realize integrated compact optical measurement systems, such as common-path interferometers.

Pipelined nonlinear spline filter for speech prediction

2021 ◽  
Vol 179 ◽  
pp. 108057
Author(s):  
Zhao Zhang ◽  
Sheng Zhang ◽  
Jiashu Zhang
Keyword(s):  
Spline Filter

Intracavity beam shaping for nanoscale surface metrology

2003 ◽  
Author(s):  
Boris Spektor ◽  
Yurij Parkhomenko ◽  
Josef Shamir
Keyword(s):  
Beam Shaping ◽  
Surface Metrology
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