Design method of high-efficient LED freeform optical system for aeronautical ground light

We propose a design method of asymmetric double freeform surface lens for an integrated LED automobile headlamp and develop an integrated LED automobile optical system. A single asymmetric double freeform surface lens is designed to redistribute rays emitting from the light source for realizing both low and high beams. Moreover, a freeform surface reflector is used to improve the energy efficiency of high beams. The prism placed in the optical path can suppress chromatic dispersion on the edge of the target plane. Simulation and experimental results show that the illumination values and color temperature of the key points can fully meet the requirements of United Nations Economic Commission for Europe vehicle regulations (ECE) R112, 48, and 128. The volume of the whole optical system comprised of freeform surface elements is smaller than that of the low beam system of a traditional headlamp, resulting in saved space, in which other electronic devices can be installed for the safety of the driver, which indicates that the proposed method is practical in the field of automobile lighting.

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Design method of infrared microscope optical system with lower aberration compensation

Infrared and Laser Engineering ◽

10.3788/irla.2_2020-0153 ◽

2021 ◽

Vol 50 (2) ◽

pp. 20200153-20200153

Author(s):

刘智颖 Zhiying Liu ◽

吕知洋 Zhiyang Lv ◽

高柳絮 Liuxu Gao

Keyword(s):

Optical System ◽

Design Method ◽

Infrared Microscope

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Design of High-Efficient Bits for Igneous Rock in Xushen Gasfield

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.385-386.308 ◽

2013 ◽

Vol 385-386 ◽

pp. 308-311

Author(s):

Li Gang Zhang ◽

Tie Yan ◽

Shi Bin Li

Keyword(s):

Tungsten Carbide ◽

Design Method ◽

Polycrystalline Diamond ◽

High Hardness ◽

Rake Angle ◽

Gas Field ◽

Working Face ◽

High Efficient ◽

Low Efficiency ◽

Bit Life

The igneous rocks in deep formations of the Xushen gasfield have the following characters: high abrasive property, high hardness, and high drillability, which lead to many drill bit accidents, few footage per bit , low efficiency of drilling, long drilling cycle, these severely restrict the exploration and development process of gas field. According to the features of deep formation, a hybird cutters bit is designed. It has three cones, with the overhang cone , duplicate taper and offset cone characters. The tungsten carbide cutters and the polycrystalline diamond compacts cutters are alternative collocation in the same tooth row in the bit. The exposed height of the tungsten carbide cutters is higher than polycrystalline diamond compacts cutters. The back rake angle of polycrystalline diamond compacts cutters is 10 ~ 40 °, the side rake angle is 10 ~ 30 °. The normal direction of working face stay the same with the composite slip direction, and the side rake pointed at adjacent gullet. Through the design method, it is integrated that the advantages of roller bit and PDC bit, the way of impact breakage and rotational shear breakage and the prominent performance of tungsten carbide cutters and polycrystalline diamond compacts cutters. It can improveROP and bit life.

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Optical System Design with High Resolution and Large Field of View for the Remote Sensor

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.364-366.550 ◽

2007 ◽

Vol 364-366 ◽

pp. 550-554

Author(s):

Jun Chang ◽

Zhi Cheng Weng ◽

Yong Tian Wang ◽

De Wen Cheng ◽

Hui Lin Jiang

Keyword(s):

High Resolution ◽

Optical System ◽

Design Method ◽

Field Of View ◽

Large Field ◽

Wide Field ◽

Remote Sensor ◽

Wide Field Of View ◽

Technological Developments ◽

Technological Opportunities

In this paper, we are presenting a design method and its results for a space optical system with high resolution and wide field of view. This optical system can be used both in infrared and visible configurations. The designing of this system is based on an on-axis three-mirror anastigmatic (TMA) system. Here the on-axis concept allows wide field of view (FOV) enabling a diversity of designs available for the Multi-Object Spectrometer instruments optimized for low scattered and low emissive light. The available FOVs are upto 1º in both spectrum ranges, whereas the available aperture range is F/15 - F/10. The final optical system is a three-mirror telescope with two on-axis and one off-axis segment and its resolution is 0.3m or even lower. The distinguished feature of this design is that it maintains diffraction-limited image at wide wavelengths. The technological developments in the field of computer generated shaping of large-sized optical surface details with diffraction-limited imagery have opened new avenues towards the designing techniques. Such techniques permit us to expand these technological opportunities to fabricate the aspherical off-axis mirrors for a complex configuration.

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Design method for infrared elliptical dome optical system with wide field-of-regard

JOURNAL OF INFRARED AND MILLIMETER WAVES ◽

10.3724/sp.j.1010.2013.00259 ◽

2013 ◽

Vol 32 (3) ◽

pp. 259 ◽

Cited By ~ 1

Author(s):

Chao WANG ◽

Xin ZHANG ◽

Ling-Jie WANG ◽

He-Meng QU ◽

Chao WANG

Keyword(s):

Optical System ◽

Design Method ◽

Wide Field

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A Study on the Effect of Performance Factor on GSHP System through Real-Scale Experiments in Korea

Energies ◽

10.3390/en13030554 ◽

2020 ◽

Vol 13 (3) ◽

pp. 554

Author(s):

Hongkyo Kim ◽

Yujin Nam ◽

Sangmu Bae ◽

Jae Sang Choi ◽

Sang Bum Kim

Keyword(s):

Heat Pump ◽

System Performance ◽

Storage Tank ◽

Heat Storage ◽

Design Method ◽

Ground Source Heat Pump ◽

Pump System ◽

Heat Pump System ◽

Ground Source ◽

High Efficient

A ground source heat pump system is one of the high-efficient technologies for space heating and cooling since it uses stable underground temperature. However, in actual application, many situations cannot be achieved due to the unsuitable design of operation. In particular, the design characteristics of buildings with different building load patterns are not reflected by the conventional design method. Moreover, the design capacity of the heat pump can be reduced by designing less capacity than the peak load through the introduction of the heat storage tank, but there is no related quantitative design method. Therefore, in this study, the effect of the ground source heat pump system design factors such as shape, length of the ground heat exchanger, and the capacity of the heat storage tank on the system performance was analyzed. To quantify the effect of such factors on system performance, an experimental plant was constructed and case studies were conducted for each design factor.

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Design and Realization of Helical Rotor NC Automatic Programming System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.605-607.1469 ◽

2012 ◽

Vol 605-607 ◽

pp. 1469-1473

Author(s):

Feng Chen ◽

Liang Yao Gu ◽

Yue Yang ◽

Chun Yang Jia

Keyword(s):

Design Method ◽

Numerical Control ◽

Programming System ◽

Automatic Programming ◽

Geometrical Properties ◽

Object Oriented Design ◽

High Efficient ◽

Nc Machine ◽

Rotor Surface ◽

Migration Method

Helical rotor is a core component of helical-lobe compressor. Analysis was made on the geometrical properties of tooth curves. Using standard spherical milling cutter on 4-axis NC machine, normal migration method was used to rotor surface processing. Based on the generation characteristics of helical rotor surface, object-oriented design method is used to achieve automatic programming system of helical rotor. The calculation of helical rotor end face profile lines and cutter location point are realized, and over cutting analysis is carried out to generate high efficient numerical control processing program.

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