scholarly journals Ultrathin Tunable Lens Based on Boundary Tension Effect

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 4018 ◽  
Author(s):  
Ao Yang ◽  
Jie Cao ◽  
Fanghua Zhang ◽  
Yang Cheng ◽  
Qun Hao
Keyword(s):  
Liquid Film ◽  
Small Volume ◽  
Optical Design ◽  
Optical Systems ◽  
Light Weight ◽  
Fabrication Method ◽  
Processing Mode ◽  
Liquid Lenses ◽  
Working Principle ◽  
Tunable Lens

Solid and liquid lenses are commonly used in optical design. Such lenses have suitable thicknesses due to their working principle and processing mode. Thus, zoom optical systems comprising solid and liquid lenses are extremely large. This work presents a new ultrathin tunable lens (UTL) comprising two liquid film lenses (LFLs) obtained through aspheric deformation and produced from the surface of a micro-liquid under gravity and boundary tension. The UTL can flexibly change focal lengths between positive and negative lenses when the device thickness is merely 2.15 mm. The proposed lens has the advantages of small volume, light weight, simple fabrication, and independence from external force during zooming. This research makes up for the drawback that traditional solid and liquid lenses cannot further reduce their thicknesses. The proposed UTL provides a new lens form and fabrication method, and can be used to replace solid and liquid lenses for designing miniature zoom optical systems.

On the small fiber-coupled laser controller for animal robot

2016 ◽  
Vol 36 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Haixia Wang ◽  
Yuliang Wang ◽  
Yaozong Sun ◽  
Qiong Pu ◽  
Xiao Lu
Keyword(s):  
Design Methodology ◽  
High Stability ◽  
Small Volume ◽  
Modular Design ◽  
Current Amplitude ◽  
Light Weight ◽  
Controlled System ◽  
Content Type ◽  
Small Fiber ◽  
In Virtue Of

Purpose Because of the inconvenience and inflexibility of the laser controller, the applied range of optogenetics is limited. This paper aims to present the design of a portable remote-controlled laser controller system, including the remote-controlled system and the laser stimulator. Design/methodology/approach The remote-controlled system is handheld, which can wirelessly adjust the power and the emitting frequency of the laser by utilizing the ZigBee module. Findings The laser stimulator can be mounted on the animal as it is light weight (35 g) and small in size (40 × 40 × 20 mm), and its power and frequency can be appropriately adjusted by changing the current amplitude and duty radio. In the end, the experiments verify the reliability and effectiveness of the laser controller. Originality/value In virtue of the modular design of the driven circuit and the reasonable layout, the whole system has the advantages of small volume, convenient control and high stability, which provide the convenience for the development of portable optogenetics animal robot experiment and has broad market prospects.

scholarly journals Flowline Optical Simulation to Refractive/Reflective 3D Systems: Optical Path Length Correction

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 101 ◽  
Author(s):  
Angel García-Botella ◽  
Lun Jiang ◽  
Roland Winston
Keyword(s):  
Vector Field ◽  
Path Length ◽  
Optical Design ◽  
Radiant Energy ◽  
Computation Time ◽  
Optical Path Length ◽  
Optical Path ◽  
Optical Systems ◽  
Optical Simulation ◽  
Reflective Systems

Nonimaging optics is focused on the study of techniques to design optical systems for the purpose of energy transfer instead of image forming. The flowline optical design method, based on the definition of the geometrical flux vector J, is one of these techniques. The main advantage of the flowline method is its capability to visualize and estimate how radiant energy is transferred by the optical systems using the concepts of vector field theory, such as field line or flux tube, which overcomes traditional raytrace methods. The main objective this paper is to extend the flowline method to analyze and design real 3D concentration and illumination systems by the development of new simulation techniques. In this paper, analyzed real 3D refractive and reflective systems using the flowline vector potential method. A new constant term of optical path length is introduced, similar and comparable to the gauge invariant, which produces a correction to enable the agreement between raytrace- and flowline-based computations. This new optical simulation methodology provides traditional raytrace results, such as irradiance maps, but opens new perspectives to obtaining higher precision with lower computation time. It can also provide new information for the vector field maps of 3D refractive/reflective systems.

Review of Ejection Seat Electronic Program Controller

2014 ◽  
Vol 551 ◽  
pp. 530-534
Author(s):  
Yu Fei Wang ◽  
Li Lin Han ◽  
Feng Wang
Keyword(s):  
Time Delay ◽  
High Precision ◽  
Small Volume ◽  
Light Weight ◽  
Separation System ◽  
Development Potential ◽  
Life Saving ◽  
Main Component ◽  
Program Controller

Ejector seat program controller is the key device unfolded by the separation of the control people-seat and lifesaving parachute after the seat ejection from the machine, which is the main component of seat separation system. Compared with the mechanical program controller, electronic program controller has many advantages: small volume, light weight, time delay of high precision, good flexibility, strong power, easy to expand, the tremendous development potential and splendid testability. This paper respectively introduces the English MK series seats, American ACES series seat and Russian K-36Дseries seat electronic program controller, focusing on the TWZI type electronic program controller developed by China Aviation Life-saving Institute

A Design of New-Type Pipe Thread Forming Machine Based on Pro/E

2012 ◽  
Vol 628 ◽  
pp. 497-499
Author(s):  
Mei Ling An ◽  
Yan Gui Du
Keyword(s):  
Small Volume ◽  
Structural Model ◽  
High Efficiency ◽  
Design Tool ◽  
Interference Detection ◽  
Light Weight ◽  
Physical Prototype ◽  
New Type ◽  
Movement Simulation

The pipe thread forming machine was innovatively designed in the article, using Pro/E as a design tool, we built the structural model of the pipe thread forming machine and performed interference detection and movement simulation for it, on the basis of this, we made a physical prototype. And our experiment showed the complete machine has the characteristics of high efficiency, tight structure, small volume and light weight, and it was easy to move.

scholarly journals Efficient Robust Design Optimization of Optical Systems

2019 ◽  
Vol 215 ◽  
pp. 02001
Author(s):  
Stephanie Kunath
Keyword(s):  
Design Optimization ◽  
Robust Design ◽  
Optical Design ◽  
Simulation Software ◽  
Robust Design Optimization ◽  
Optical Systems ◽  
Optical Simulation ◽  
Optimization Approach ◽  
Trade Off ◽  
Virtual Product Development

To accelerate the virtual product development of using optical simulation software, the Robust Design Optimization approach is very promising. Optical designs can be explored thoroughly by means of sensitivity analysis. This includes the identification of relevant input parameters and the modelling of inputs vs. outputs to understand their dependencies and interactions. Furthermore, the intelligent definition of objective functions for an efficient subsequent optimization is of high importance for multi-objective optimization tasks. To find the best trade-off between two or more merit functions, a Pareto optimization is the best choice. As a result, not only one design, but a front of best designs is obtained and the most appropriate design can be selected by the decision maker. Additionally, the best trade-off between output variation of the robustness (tolerance) and optimization targets can be found to secure the manufacturability of the optical design by several advanced approaches. The benefit of this Robust Design Optimization approach will be demonstrated.

Differentiable Compound Optics and Processing Pipeline Optimization for End-to-end Camera Design

2021 ◽  
Vol 40 (2) ◽  
pp. 1-19
Author(s):  
Ethan Tseng ◽  
Ali Mosleh ◽  
Fahim Mannan ◽  
Karl St-Arnaud ◽  
Avinash Sharma ◽  
...  
Keyword(s):  
Neural Network ◽  
Image Processing ◽  
Optical Design ◽  
Neural Nets ◽  
Fine Tuning ◽  
Optical Systems ◽  
Design Tools ◽  
End To End ◽  
Application Specific ◽  
Network Processing

Most modern commodity imaging systems we use directly for photography—or indirectly rely on for downstream applications—employ optical systems of multiple lenses that must balance deviations from perfect optics, manufacturing constraints, tolerances, cost, and footprint. Although optical designs often have complex interactions with downstream image processing or analysis tasks, today’s compound optics are designed in isolation from these interactions. Existing optical design tools aim to minimize optical aberrations, such as deviations from Gauss’ linear model of optics, instead of application-specific losses, precluding joint optimization with hardware image signal processing (ISP) and highly parameterized neural network processing. In this article, we propose an optimization method for compound optics that lifts these limitations. We optimize entire lens systems jointly with hardware and software image processing pipelines, downstream neural network processing, and application-specific end-to-end losses. To this end, we propose a learned, differentiable forward model for compound optics and an alternating proximal optimization method that handles function compositions with highly varying parameter dimensions for optics, hardware ISP, and neural nets. Our method integrates seamlessly atop existing optical design tools, such as Zemax . We can thus assess our method across many camera system designs and end-to-end applications. We validate our approach in an automotive camera optics setting—together with hardware ISP post processing and detection—outperforming classical optics designs for automotive object detection and traffic light state detection. For human viewing tasks, we optimize optics and processing pipelines for dynamic outdoor scenarios and dynamic low-light imaging. We outperform existing compartmentalized design or fine-tuning methods qualitatively and quantitatively, across all domain-specific applications tested.

Optical design and unification of optical systems of objectives for microscopes

2018 ◽  
Author(s):  
Olga A. Vinogradova ◽  
Vladimir N. Frolov ◽  
Pavel S. Vakulov ◽  
Dmitry N. Frolov
Keyword(s):  
Optical Design ◽  
Optical Systems
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