Freeform optics design for Raman spectroscopy

2020 ◽  
Author(s):  
Tobias Grabe ◽  
Yang Li ◽  
Henrik Krauss ◽  
Alexander G. Wolf ◽  
Junjun Wu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Freeform Optics ◽  
Optics Design

A freeform optics design with limited data for extended LED light sources

2016 ◽  
Vol 63 (21) ◽  
pp. 2151-2158 ◽  
Author(s):  
Zhenfeng Zhuang ◽  
Phil Surman ◽  
Feihong Yu
Keyword(s):  
Light Sources ◽  
Limited Data ◽  
Led Light ◽  
Freeform Optics ◽  
Optics Design

scholarly journals Influence of the characteristics of a light source and target on the Monge–Ampére equation method in freeform optics design

2014 ◽  
Vol 39 (3) ◽  
pp. 634 ◽  
Author(s):  
Rengmao Wu ◽  
Pablo Benítez ◽  
Yaqin Zhang ◽  
Juan C. Miñano
Keyword(s):  
Light Source ◽  
Equation Method ◽  
Freeform Optics ◽  
Monge Ampere ◽  
Optics Design

scholarly journals Freeform optics design for extended sources in paraxial approximation exploiting the expectation maximization algorithm

2020 ◽  
Vol 28 (24) ◽  
pp. 37004
Author(s):  
Annika Völl ◽  
Michael Berens ◽  
Rolf Wester ◽  
Paul Buske ◽  
Jochen Stollenwerk ◽  
...  
Keyword(s):  
Expectation Maximization ◽  
Expectation Maximization Algorithm ◽  
Paraxial Approximation ◽  
Freeform Optics ◽  
Extended Sources ◽  
Optics Design

scholarly journals Accounting for laser beam characteristics in the design of freeform optics for laser material processing

2019 ◽  
Vol 8 (3-4) ◽  
pp. 279-287 ◽  
Author(s):  
Annika Völl ◽  
Rolf Wester ◽  
Michael Berens ◽  
Paul Buske ◽  
Jochen Stollenwerk ◽  
...  
Keyword(s):  
Output Power ◽  
Intensity Distribution ◽  
Maximum Output Power ◽  
Divergence Angle ◽  
Maximum Output ◽  
Laser Material Processing ◽  
Design Algorithm ◽  
Numerical Noise ◽  
Freeform Optics ◽  
Optics Design

Abstract Recently, freeform optics have been introduced for application adapted beam shaping in laser heat treatment. There, intensity distributions are generated that induce previously defined temporal and spatial temperature profiles. To this end, a two-step simulation strategy is necessary, where in the first step the intensity distribution must be derived for which in the second step the freeform optics is calculated. To provide a design that can successfully be integrated in an experimental setup, the incoming laser beam’s characteristics must be accounted for in the derivation of the adapted intensity distribution as well as in the freeform optics design. Here, the two most relevant quantities are the beam’s maximum output power as well as the divergence angle. In this work, strategies are presented that account for the beam’s maximum output power in the derivation of the adapted intensity distribution. Furthermore, stabilizing methods are introduced to enhance the performance of a previously introduced freeform optics design algorithm that takes into account the laser beam’s finite divergence angle but suffers from numerical noise and oscillation problems. A simulation example that uses both techniques is given for (nano)ceramic thin-film laser processing.

scholarly journals Reflective Optics Design for an LED High Beam Headlamp of Motorbikes

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Peng Ge ◽  
Xiang Wang ◽  
Yang Li ◽  
Hong Wang
Keyword(s):  
Monte Carlo ◽  
Design Method ◽  
Physical Object ◽  
United Nations Economic Commission ◽  
High Beam ◽  
Light Pattern ◽  
Economic Commission ◽  
Reflective Optics ◽  
Freeform Optics ◽  
Optics Design

We propose a reflective optics design for an LED motorbike high beam lamp. We set the measuring screen as an elliptical zone and divide it into many small lattices and divide the spatial angle of the LED source into many parts and make relationships between them. According to the conservation law of energy and the Snell’s law, the reflector is generated by freeform optics design method. Then the optical system is simulated by Monte Carlo method using ASAP software. Light pattern of simulation could meet the standard. The high beam headlamp is finally fabricated and assembled into a physical object. Experiment results can fully comply with United Nations Economic Commission for Europe (ECE) vehicle regulations R113 revision 2 (Class C).

scholarly journals Simplified freeform optics design for complicated laser beam shaping

2017 ◽  
Vol 56 (33) ◽  
pp. 9308 ◽  
Author(s):  
Zexin Feng ◽  
Brittany D. Froese ◽  
Rongguang Liang ◽  
Dewen Cheng ◽  
Yongtian Wang
Keyword(s):  
Laser Beam ◽  
Beam Shaping ◽  
Laser Beam Shaping ◽  
Freeform Optics ◽  
Optics Design

Limitations of the ray mapping approach in freeform optics design

2013 ◽  
Vol 38 (11) ◽  
pp. 1945 ◽  
Author(s):  
Adrien Bruneton ◽  
Axel Bäuerle ◽  
Rolf Wester ◽  
Jochen Stollenwerk ◽  
Peter Loosen
Keyword(s):  
Mapping Approach ◽  
Freeform Optics ◽  
Optics Design
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