High-accuracy mathematical fitting to calculation the atmospheric transmittance of infrared radiation

2015 ◽  
Author(s):  
Liang-hong Hua ◽  
Qing-ping Hu ◽  
Xiao-hui Zhang
Keyword(s):  
Infrared Radiation ◽  
High Accuracy ◽  
Atmospheric Transmittance

scholarly journals Depth image correction for intel realsense depth camera

2020 ◽  
Vol 19 (2) ◽  
pp. 1021
Author(s):  
Hyun Jun Park ◽  
Kwang Baek Kim
Keyword(s):  
Image Processing ◽  
Infrared Radiation ◽  
Infrared Camera ◽  
High Accuracy ◽  
Depth Image ◽  
Depth Information ◽  
Depth Camera ◽  
Image Correction ◽  
Image Processing Techniques ◽  
Processing Techniques

<p><span>Intel RealSense depth camera provides depth image using infrared projector and infrared camera. Using infrared radiation makes it possible to measure the depth with high accuracy, but the shadow of infrared radiation makes depth unmeasured regions. Intel RealSense SDK provides a postprocessing algorithm to correct it. However, this algorithm is not enough to be used and needs to be improved. Therefore, we propose a method to correct the depth image using image processing techniques. The proposed method corrects the depth using the adjacent depth information. Experimental results showed that the proposed method corrects the depth image more accurately than the Intel RealSense SDK.</span></p>

Application of Two Unknown Quantities and Three Points Interpolation in the Atmospheric Transmittance of Infrared Radiation

2013 ◽  
Vol 756-759 ◽  
pp. 3665-3668
Author(s):  
Hong Hui Sun ◽  
Min Li ◽  
Jian She Song
Keyword(s):  
Infrared Radiation ◽  
Interpolation Method ◽  
Experimental Results ◽  
Engineering And Technology ◽  
Atmospheric Transmittance

The atmospheric transmittance of infrared radiation is the important parameter on the studies of infrared radiation, the Computation of atmospheric transmittance is professional and complicated and it is inconvenient for the application of engineering and technology. In order to gained the atmospheric transmittance of infrared radiation rapidly when the height of infrared apparatus place and the down range distance between infrared apparatus and infrared object are changed, Lagranges two unknown quantities and three points interpolation is used to computer the interpolations of the atmospheric transmittance of infrared radiation by the MODTRAN software, then the available data of atmospheric transmittance are gained. The experimental results show the interpolation method is effective and valuable in engineering applation.

Study of Flying Projectile’s Properties of Infrared Radiation

2012 ◽  
Vol 268-270 ◽  
pp. 1648-1653
Author(s):  
Yue Ying Lv ◽  
Ying An
Keyword(s):  
Surface Temperature ◽  
Infrared Radiation ◽  
Attenuation Factor ◽  
Radiation Energy ◽  
Light Level ◽  
Detection Distance ◽  
Low Light ◽  
Linear Change ◽  
Radiation Properties ◽  
Atmospheric Transmittance

In order to solve the problem that the optic-electric detecting target board fails to work at nights or under low light level，it has studied the flying projectile’s properties of infrared radiation and the radiation attenuation properties of the flying projectile in the atmosphere. Through establishing the differential equations, the projectile’s surface temperature is obtained to calculate the flying projectile’s infrared radiation properties , according to atmosphere’s transmitting properties，the calculation method of atmospheric transmittance rate. The infrared radiation properties of three typical projectile are simulated by utilizing MATAB. The simulation result shows that the surface temperature of the flying projectile has a linear change with its velocity; the atmospheric transmittance rate is inversely proportional to the detection distance; Once the atmospheric attenuation factor is different, then the radiation energy received by the detector will be different.

Infrared radiation measurement based on proportional corrected atmospheric transmittance

2012 ◽  
Vol 20 (7) ◽  
pp. 1626-1635 ◽  
Author(s):  
杨词银 YANG Ci-yin ◽  
张建萍 ZHANG Jian-ping ◽  
曹立华 CAO Li-hua
Keyword(s):  
Infrared Radiation ◽  
Radiation Measurement ◽  
Atmospheric Transmittance

scholarly journals Numerical calculation of passenger compartment cooling effect under the action of radiative cooling film based on MATLAB

2021 ◽  
Vol 2125 (1) ◽  
pp. 012027
Author(s):  
Yipeng Chao ◽  
Xin Luo ◽  
Chao Zheng ◽  
Yipeng Chao
Keyword(s):  
Ambient Temperature ◽  
Infrared Radiation ◽  
Simulation Models ◽  
Cooling Effect ◽  
Radiative Cooling ◽  
Passenger Compartment ◽  
Time Space ◽  
Cold Source ◽  
Radiation Material ◽  
Atmospheric Transmittance

Abstract Radiative cooling uses space cold source to cool the object, and the radiative cooling film made by using this principle can be applied to automobiles effectively to save the refrigeration resources of automobiles. However, due to the limitation of economy, time, space and other factors, it is difficult to carry out comprehensive research on the actual film-forming cooling effect. Based on the principle of passive radiative cooling, a set of simulation models is developed, which is applied to the selection of infrared radiation materials for automotive radiative cooling film and the study of the influence of environmental factors on the radiative cooling effect. SiO2 was finally selected as infrared radiation material. At the same time, the theoretical cooling temperature of the radiative cooling film applied to the passenger compartment of automobiles can reach 6.8°C under the conditions of 35°C ambient temperature, 0.99 atmospheric transmittance and 10 heat transfer coefficient, using SiO2 as infrared radiation material and PE as dispersion substrate. At the same time, the cooling effect of the radiative cooling film is positively correlated with the ambient temperature, atmospheric transmittance to some extent.

A New 1,000 kV Electron Microscope

1967 ◽  
Vol 25 ◽  
pp. 260-261
Author(s):  
M. Nishigaki ◽  
S. Katagiri ◽  
H. Kimura ◽  
B. Tadano
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Basic Research ◽  
Chromatic Aberration ◽  
High Accuracy ◽  
Biological Specimen ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron

The high voltage electron microscope has many advantageous features in comparison with the ordinary electron microscope. They are a higher penetrating efficiency of the electron, low chromatic aberration, high accuracy of the selected area diffraction and so on. Thus, the high voltage electron microscope becomes an indispensable instrument for the metallurgical, polymer and biological specimen studies. The application of the instrument involves today not only basic research but routine survey in the various fields. Particularly for the latter purpose, the performance, maintenance and reliability of the microscope should be same as those of commercial ones. The authors completed a 500 kV electron microscope in 1964 and a 1,000 kV one in 1966 taking these points into consideration. The construction of our 1,000 kV electron microscope is described below.

Sign in / Sign up

Export Citation Format

Share Document