The optics and physics of near infrared imaging

Vollmer, Michael; Möllmann, Klaus‐Peter; Shaw, Joseph A.

doi:10.1117/12.2223094

Cited by 20 publications

(14 citation statements)

References 10 publications

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“…At the other end of the visible spectrum to the UV and above 700 nm is the IR region. Normal silicon based camera sensors are sensitive up to around 1100 nm [ 39 ], and IR imaging (i.e., above 700 nm) is often used by landscape photographers to darken skies and lighten foliage [ 40 ], and in forensics analysis of skin [ 41 ]. The method used to derive the spectral sensitivity curves in Figure 1 and Figure 2 can only be used up to 800 nm with the equipment available to the author.…”

Section: Resultsmentioning

confidence: 99%

Monochrome Camera Conversion: Effect on Sensitivity for Multispectral Imaging (Ultraviolet, Visible, and Infrared)

Crowther¹

2022

J. Imaging

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Conversion of standard cameras to enable them to capture images in the ultraviolet (UV) and infrared (IR) spectral regions has applications ranging from purely artistic to science and research. Taking the modification of the camera a step further and removing the color filter array (CFA) results in the formation of a monochrome camera. The spectral sensitivities of a range of cameras with different sensors which were converted to monochrome were measured and compared with standard multispectral camera conversions, with an emphasis on their behavior from the UV through to the IR regions.

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Section: Resultsmentioning

confidence: 99%

Monochrome Camera Conversion: Effect on Sensitivity for Multispectral Imaging (Ultraviolet, Visible, and Infrared)

Crowther¹

2022

J. Imaging

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“…Silicon can be processed with highly optimized and cost efficient semi-conductor manufacturing techniques. Its peak sensitivity is around 900 to 1000 nm with a steep drop-off at 1100 nm 36 where silicon becomes transparent. The major downside of NIR wavelength are eye safety limitations that prevail in this regime (close proximity to the visible range of the human eye) and restrict the optical energy output.…”

Section: Lidar Design Spacementioning

confidence: 99%

Technical concepts of automotive LiDAR sensors: a review

et al. 2023

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Automotive LiDAR sensors are seen by many as the enabling technology for higherlevel autonomous driving functionalities. Different concepts to design such a sensor can be found in the industry. Some have already been integrated into consumer cars while many others promise to be in mass production soon to become cost-effective enough for broad deployment. However, automotive LiDAR sensors are still evolving and a variety of sensor designs are pursued by different companies. Here, we construct the automotive LiDAR design space to visually depict system design options for these sensors. Subsequently, we exemplify the concepts with drawings that can be found in published patent applications (focusing on scanning mechanisms and scan patterns) before discussing their advantages and challenges.

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“…In homogeneous fluids, light propagation is very dependent on refractive index, n . The refractive index of air, n is influenced by temperature, T , pressure, P , density,  and humidity, RH [9,[15][16][17][18]. If temperature is low, density increases, so the refractive index increases, conversely.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Humidity on the Visibility of Mirage on the Runway of Sultan Iskandar Muda Airport, Aceh, Indonesia

et al. 2019

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A B S T R A C TThe relationship between temperature and humidity of air and visibility of mirage has been studied by observing mirage on the runway of Sultan Iskandar Muda International Airport (SIM) Aceh, Indonesia. Temperature and humidity data were obtained from BlangBintang Meteorology, Climatology and Geophysics Station's database, Aceh Besar, Aceh, Indonesia. It was observed that mirage has shown up from morning to afternoon, from 07.00 AMuntil 18.00 PM, even until sunset. Mirage is also still visible when the weather is cloudy or drizzling, but disappeared when heavy rain. The lowest and highest temperatures where the mirage can still be observed are 26.0 0 C and 32.0 0 C, respectively. Meanwhile, the lowest and highest air humidities where mirages can still be observed are 51.0% and 92.0%, respectively. Observation shows that changes in temperature and humidity in the runway environment greatly affect the appearance and visibility of mirages. When the air temperature is high and the humidity is low, the mirage appears with high visibility (very thick), so that it can be observed clearly visually. Conversely, when the temperature of air is low and the humidity is high, mirage appears with low visibility (very thin) or almost non-existent or completely gone.

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The optics and physics of near infrared imaging

Cited by 20 publications

References 10 publications

Monochrome Camera Conversion: Effect on Sensitivity for Multispectral Imaging (Ultraviolet, Visible, and Infrared)

Monochrome Camera Conversion: Effect on Sensitivity for Multispectral Imaging (Ultraviolet, Visible, and Infrared)

Technical concepts of automotive LiDAR sensors: a review

Effect of Temperature and Humidity on the Visibility of Mirage on the Runway of Sultan Iskandar Muda Airport, Aceh, Indonesia

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