45/80-degree specular reflectance

Bright Plating electroplating under conditions whereby the electrodeposit has a high degree of specular reflectivity. 

Figure 5 shows the BRDF plot for two randomly polished mirrors. As explained previously, this is a plot of scattered intensity versus angle. The 0° point on the horizontal axis indicates the direction of the specular reflection. All other directions on the plot are relative to this direction (0, — 0j in Fig. 4). The vertical axis is the BRDF scatter (on a logarithmic scale). BRDF is typically plotted on a logarithmic scale because it changes over several orders of magnitude within a few degrees of the specular beam.

For light of wavelength Aj incident on a planar chiral nematic texture of pitch p, the optical rotatory power is extremely high (i.e., lO " degrees/mm) outside the specular reflection band, i.e.,... 

Yecheol Rho earned his BS degree in 2007 from POSTECH and joined professor Ree s group for his PhD. He is currently working on the structures of functional polymers in nanoscale thin films for microelectronic and biomedical devices using GIXS and specular reflectivity as well as infrared spectroscopy and calorimetry. 

For opaque materials, the reflectance p is the complement of the absorptance. The directional distribution of the reflected radiation depends on the material, its degree of roughness or grain size, and, if a metal, its state of oxidation. Polished surfaces of homogeneous materials reflect speciilarly. In contrast, the intensity of the radiation reflected from a perfectly diffuse, or Lambert, surface is independent of direction. The directional distribution of reflectance of many oxidized metals, refractoiy materials, and natural products approximates that of a perfectly diffuse reflector. A better model, adequate for many calculational purposes, is achieved by assuming that the total reflectance p is the sum of diffuse and specular components p i and p. ... 

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