Measurement of Directional Characteristics of Reflection From the Surface of Materials Using Polarized Light

Matsuura, Kiyotaka; Uetani, Yoshiaki

doi:10.3130/aijax.388.0_15

Cited by 5 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the following measurements were made by using two polarizing filters (Matsuura and Uetani 1988). The plane-polarized light; p-polarized light or s-polarized light, irradiates the sample surface.…”

Section: Separation Of Unpolarized Component and Polarized Componentmentioning

confidence: 99%

“…By this system, we could describe approximately the directional characteristics of near infrared light in the process of reflection and transmission from wood. However, as Matsuura and Uetani (1988) reported, it is very important to separate the reflected light into a polarized and unpolarized component when considering the light scattering caused by interaction between light and wood properties. They measured the directional characteristics of reflection from the surface of materials using polarized natural light.…”

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Directional Characteristics of Near Infrared Light Reflected from Wood

Tsuchikawa¹,

Torii²,

Tsutsumi³

2001

Holzforschung

View full text Add to dashboard Cite

A near infrared auto-goniophotometer was designed to acquire detailed information on optical characteristics of a biological material which had a cellular structure, such as wood. The reflected light, which originated from the irradiation of polarized near infrared light, was separated into an unpolarized and a polarized component by using two polarizing filters. The standardized reflected intensities of each component at various incident angles q and observation angles h, r up (q, h) and r p (q, h), were measured. Sitka spruce samples with various thicknesses were used. The measurements showed that the directional characteristics of the unpolarized component were affected significantly by the irradiation conditions and the sample thickness. Particularly, these varied with the wavelength of incident light l. This shows that the directional characteristics models we proposed previously are reasonable. On the other hand, matrices of the directional characteristics for polarized components typically show an elliptical shape which is strongly affected by incident angle and only slightly by l. Based on these results, the effects of sample thickness on the spectral directional characteristics were determined.

show abstract

Section: Separation Of Unpolarized Component and Polarized Componentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Directional Characteristics of Near Infrared Light Reflected from Wood

Tsuchikawa¹,

Torii²,

Tsutsumi³

2001

Holzforschung

View full text Add to dashboard Cite

show abstract

Directional Characteristics Model and Light-Path Model for Biological Material Having Cellular Structure

Tsuchikawa¹,

Tsutsumi²

1999

Appl Spectrosc

View full text Add to dashboard Cite

Nondestructive measurements, based on NIRS (near-infrared spectroscopy), on biological material having cellular structure, such as wood, require a nontraditional approach. In this respect, a truly nondestructive measurement system that can accurately monitor the physical condition and chemical components of materials is very desirable. Supported by a series of experiments, we constructed optical characteristic concepts that account for the cellular structure of a sample. The system was successfully modeled by following theoretically the sequential propagation of light in a sample (specifically, scattering, reflection, absorption, and transmission), which varies according to the angle of the fibers with respect to the direction of incident light, θ, and with its wavelength. A set of optical models, which consists of a directional characteristics model and a light-path model, has been developed to describe the various steps in the sequence. On the basis of these models, the leakage ratios of diffusely reflected light from the aggregate width of semi-infinite tracheids, S(θ), for various conditions of irradiation were calculated. These values were in good agreement with the actual values obtained from the measured values of absorbance through the judicious use of a semi-theoretical equation.

show abstract

A Simplified Estimation of Directional Reflection Characteristics of Building Materials Utilizing Readily Measurable Physical Properties

Yabe

Hara

Harada

2019

Nihon Kenchiku Gakkai Kankyokei Ronbunshu

View full text Add to dashboard Cite

In order to easily obtain data of directional reflection characteristics to be incorporated into the simulation, we considered to identify feature quantity of mathematical models of directional reflection characteristics by using information obtained by employing simplified measurements. We compared detailed data of directional reflection characteristics, which were obtained by the direct measurement method utilizing polarizers in advance, with physical properties such as glossiness, surface roughness and spectral diffuse reflectance measured by using commercially available instruments. From these, it was shown that the relevance of the data to expand the possibility of the simplified estimation methods.

show abstract

Measurement of Directional Characteristics of Reflection From the Surface of Materials Using Polarized Light

Cited by 5 publications

References 0 publications

Directional Characteristics of Near Infrared Light Reflected from Wood

Directional Characteristics of Near Infrared Light Reflected from Wood

Directional Characteristics Model and Light-Path Model for Biological Material Having Cellular Structure

A Simplified Estimation of Directional Reflection Characteristics of Building Materials Utilizing Readily Measurable Physical Properties

Contact Info

Product

Resources

About