Headlamps for light based driver assistance

Götz, Mirco; Kleinkes, Michael

doi:10.1117/12.781032

Cited by 6 publications

(5 citation statements)

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“…The concept of a flying spot is a flux redirecting system and known from the cathode ray tube 6 or automotive headlights. 7,8 In all applications the region of interest is illuminated by moving a bright spot while the sensor (in the mentioned applications this is mostly the human eye) captures a single measurement. As a result, the sensor does not see a distinct spot but the integration during exposure time.…”

Section: Flying Spot Projectormentioning

confidence: 99%

Flexible illumination module for lab-on-chip applications

Müller,

Ghosh,

Ramsteiner

et al. 2024

Optical Diagnostics and Sensing XXIV: Toward Point-of-Care Diagnostics

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Lab-on-chip analysis for molecular diagnostics use an analyzer unit and cartridges. Since the cartridges are disposables, their development cycle can be much shorter than the one of the analyzer unit. Hence, it is important to have a high degree of flexibility in the analyzer unit to react to new cartridge developments. Our research tries to overcome limitations due to fixed interfaces by replacing a static illumination system for fluorescence analysis by an adjustable module. The benefit of adjustability goes along with harder requirements. In the case of the illumination system, that means a decrease in etendue of the optical system. Purpose of the presented research is to define the spectral radiance requirements on the light source as a bottleneck in an etendue limited optical system. As light source a phosphor converted light source should be used due to the benefits of a broad spectrum. First, the concept of etendue is used to specify a theoretical spectral radiance requirement on the light source. In the second step, the best available light source is used in a prototype to measure the performance of the adjustable illumination system and to derive a practical spectral radiance requirement. With the currently used light source in the lab prototype, requirements are fulfilled for one out of four spectral wavelength bands. The comparison between theory and experiment shows that the theoretical requirement must be corrected by a factor of two to a practical spectral radiance requirement of about 14 mW/(sr • mm 2 • nm). It can be concluded that especially in the blue and red wavelength range below 500 nm and over 600 nm bright phosphor converted light sources are required. Since the time the light source was selected, a new light source candidate with stronger emission for shorter wavelengths was found.

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Section: Flying Spot Projectormentioning

confidence: 99%

Flexible illumination module for lab-on-chip applications

Müller,

Ghosh,

Ramsteiner

et al. 2024

Optical Diagnostics and Sensing XXIV: Toward Point-of-Care Diagnostics

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“…Recently, more and more beam modes, such as beam patterns related with highway speeds, weather conditions and for cornering [36], can be activated purely by the electronic means [3,54] with the development in multiple-channels digital PWM driver and freely-addressable LED-arrays [18]. However, the current balance among different channels [61] and the compact package of multiple chips with multiple terminals are still the two big challenges.…”

Section: Advantages and Disadvantagesmentioning

confidence: 99%

“…Regularly, for a headlamp a thousand of lumen light output is required, which is converted from the electric energy of the battery charged by the automobile engine. Although the headlamp working time is only 25% of a day [3], the additional energy consumption or the operating cost of the headlamp cannot be omitted. For example, about 55 billion liters of gasoline and diesel or 66 billion USD costs are spent annually in operating the headlamp [4].…”

Section: Introductionmentioning

confidence: 99%

A review on light-emitting diode based automotive headlamps

Long

Zhou

et al. 2015

Renewable and Sustainable Energy Reviews

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“…Research has shown that people only perform at 25% of their ability when driving at night, and nearly 50% of all severe accidents happen during this time. In order to increase the safety when driving under poor visibility conditions, the headlamp of an automobile is a very important device in the vehicle design process [1,2]. It is very important that a well-designed headlamp of a vehicle lighting system provide drivers with safe and comfortable driving conditions at night or in dark places.…”

Section: Introductionmentioning

confidence: 99%

“…1 [3]. In the first decade of the 20th century, the technology of the incandescent lamp was first applied in the vehicle headlamp design system, which led to the current vehicle headlamp design after undergoing a revolutionary change [1]. Thus, the lighting of the vehicle headlamp was developed to the electrical age.…”

Section: Introductionmentioning

confidence: 99%

Modular design of the LED vehicle projector headlamp system

Hsieh

Hung

2013

Appl. Opt.

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A well designed headlamp for a vehicle lighting system is very important as it provides drivers with safe and comfortable driving conditions at night or in dark places. With the advances of the semiconductor technology, the LED has become the fourth generation lighting source in the auto industry. In this study, we will propose a LED vehicle projector headlamp system. This headlamp system contains several LED headlamp modules, and every module of it includes four components: focused LEDs, asymmetric metal-based plates, freeform surfaces, and condenser lenses. By optimizing the number of LED headlamp modules, the proposed LED vehicle projector headlamp system has only five LED headlamp modules. It not only provides the low-beam cutoff without a shield, but also meets the requirements of the ECE R112 regulation. Finally, a prototype of the LED vehicle projector headlamp system was assembled and fabricated to create the correct light pattern.

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Headlamps for light based driver assistance

Cited by 6 publications

References 0 publications

Flexible illumination module for lab-on-chip applications

Flexible illumination module for lab-on-chip applications

A review on light-emitting diode based automotive headlamps

Modular design of the LED vehicle projector headlamp system

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