The Research on Special Printing Effects Based on Gray Component Replacement

2010 ◽  
Vol 174 ◽  
pp. 251-254 ◽  
Author(s):  
Ming Zheng Zhu ◽  
Zhe Chen ◽  
Hao Xue Liu
Keyword(s):  
Visible Light ◽  
Spectral Response ◽  
Response Properties ◽  
Digital Printer ◽  
Gray Component Replacement ◽  
Component Replacement

The data of CMY ink’s gray balance are got to define the replacement relationship between CMY and K ink by experiment with the digital printer. A special image was got by using CMY and K ink according to the principle of Gray Component Replacement (GCR).The image will have two different appearances by using the spectral response properties of CMY and K ink under visible light and infrared light．This kind of image can achieve the purpose of anti-counterfeiting printing.

scholarly journals Studies on the substrate-dependent photocatalytic properties of Cu2O heterojunctions

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 4935-4941
Author(s):  
Riza Ariyani Nur Khasanah ◽  
Hui-Ching Lin ◽  
Hsiang-Yun Ho ◽  
Yen-Ping Peng ◽  
Tsong-Shin Lim ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Charge Separation ◽  
Spectral Response ◽  
Photocatalytic Properties ◽  
Visible Light Absorption ◽  
Uv Visible

Cu2O/TNA/Ti photoanode showed spectral response outperformed Cu2O/Ti and Cu2O/FTO photocathodes. Cu2O/TNA/Ti showed better spectral response than that of TNA/Ti, ascribed to UV-visible light absorption of Cu2O, not to charge separation enhancement.

scholarly journals An Optical Filter-Less CMOS Image Sensor with Differential Spectral Response Pixels for Simultaneous UV-Selective and Visible Imaging

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 13
Author(s):  
Yhang Ricardo Sipauba Carvalho da Silva ◽  
Rihito Kuroda ◽  
Shigetoshi Sugawa
Keyword(s):  
Visible Light ◽  
Spectral Sensitivity ◽  
Dynamic Range ◽  
Uv Light ◽  
Spectral Response ◽  
Cmos Image Sensor ◽  
Image Sensor ◽  
Oxide Semiconductor ◽  
Conversion Gain ◽  
Uv Sensitivity

This paper presents a complementary metal-oxide-semiconductor (CMOS) image sensor (CIS) capable of capturing UV-selective and visible light images simultaneously by a single exposure and without employing optical filters, suitable for applications that require simultaneous UV and visible light imaging, or UV imaging in variable light environment. The developed CIS is composed by high and low UV sensitivity pixel types, arranged alternately in a checker pattern. Both pixel types were designed to have matching sensitivities for non-UV light. The UV-selective image is captured by extracting the differential spectral response between adjacent pixels, while the visible light image is captured simultaneously by the low UV sensitivity pixels. Also, to achieve high conversion gain and wide dynamic range simultaneously, the lateral overflow integration capacitor (LOFIC) technology was introduced in both pixel types. The developed CIS has a pixel pitch of 5.6 µm and exhibits 172 µV/e− conversion gain, 131 ke− full well capacity (FWC), and 92.3 dB dynamic range. The spectral sensitivity ranges of the high and low UV sensitivity pixels are of 200–750 nm and 390–750 nm, respectively. The resulting sensitivity range after the differential spectral response extraction is of 200–480 nm. This paper presents details regarding the CIS pixels structures, doping profiles, device simulations, and the measurement results for photoelectric response and spectral sensitivity for both pixel types. Also, sample images of UV-selective and visible spectral imaging using the developed CIS are presented.

scholarly journals Degradation of norfloxacin by copper-doped Bi2WO6-induced sulfate radical-based visible light-Fenton reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (62) ◽  
pp. 38024-38032
Author(s):  
Xin Zhong ◽  
Wen-Ting Wu ◽  
Hao-Nan Jie ◽  
Wang-Ye Tang ◽  
Dan-Yan Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Fenton Reaction ◽  
Sulfate Radical ◽  
Light Irradiation ◽  
Response Properties ◽  
Led Light ◽  
Photo Response

In this work, a series of Cu(ii)-doped Bi2WO6 nanomaterials with good photo-response properties were facile synthesized and used to obtain efficient peroxymonosulfate (PMS) activation activity for norfloxacin (NOF) removal under visible LED light irradiation.

Photocatalytic Degradation of Methylene Blue Using Visible Light Active N-Doped ZnO

2015 ◽  
Vol 1101 ◽  
pp. 299-302 ◽  
Author(s):  
Hanggara Sudrajat ◽  
Sandhya Babel
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Nitrogen Doping ◽  
Spectral Response ◽  
Aqueous Suspension ◽  
Visible Region ◽  
Active Nitrogen ◽  
Visible Light Active ◽  
Doped Zno

A visible light active nitrogen-doped ZnO (N-ZnO) was synthesized using a solvent-free mechanochemical method and applied to degrade methylene blue (MB) dye in aqueous suspension. Results showed that nitrogen doping improved the photocatalytic activity of pristine ZnO by extending its spectral response to visible region. Using 2 g/L of N-ZnO, 98% MB with the initial concentration of 10 mg/L could be degraded within 2 h at pH 7 under 11.3 klux of visible light irradiation. After 6th run, it still exhibited appreciable photocatalytic activity with 94% MB degradation, indicating its high reusability though a simple pretreatment was performed.

scholarly journals Spectral Response Properties of S-potentials in the Retina of the Ayu Plecoglossus altivelis.

1999 ◽  
Vol 65 (5) ◽  
pp. 903-904 ◽  
Author(s):  
Masahiro Furuse ◽  
Masasi Mikkaichi ◽  
Kenkichi Fukurotani
Keyword(s):  
Spectral Response ◽  
Plecoglossus Altivelis ◽  
Response Properties

scholarly journals Optical properties of the scales of Morpho rhetenor butterflies: theoretical and experimental investigation of the back-scattering of light in the visible spectrum

2004 ◽  
Vol 1 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Luca Plattner
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Specular Reflection ◽  
Spectral Response ◽  
Scattered Light ◽  
Near Field ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Geometrical Features ◽  
Back Scattering

A study of the optical properties of the largely periodic microstructure occurring on the wings of the iridescent tropical butterfly Morpho rhetenor and responsible for its structural colouration is reported. An extensive measurement of the back-scattering of visible light from butterfly scales was performed for various angles of incidence. Efficient low-pass filter behaviour was observed for all angles of incidence and polarizations, with near-complete transmission at wavelengths above the threshold of 550 nm. The angular spread of the back-scattered light was found to be organized in lobes with total extinction of the specular reflection for all conditions of incidence. Retro-reflector behaviour was also observed for angles of incidence of 30° and above. Additionally, the role of periodic geometrical features found in the microstructure for the generation of its spectral response was analysed theoretically. Using finite-difference timedomain and near-field to far-field transformation techniques, the back-scattering of visible light by models was computed numerically and the relevance of geometrical features for the production of structural colour and diffraction was demonstrated.

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