Abstract—
A capacity‐coupled electrodeless Hg discharge lamp has been developed for LC TV backlightings. By applying sinusoidal voltages which are 180° out of phase with a pair of external electrodes, a luminous uniformity of over 84% is attained in two types of lamps whose lengths are 190 and 390 mm. Luminance, efficacy, and input power to the lamp are 114,000 cd/m2, 35 lm/W, and 21.5 W when the 390‐mm lamp is driven at 5 MHz. With a frequency below 1.1 MHz, eight 390‐mm lamps, connected in parallel to one another without external ballast impedance, can be driven by using a single inverter.
A capacity coupled electrodeless Hg discharge lamp has been developed for LC‐TV backlightings. By applying sinusoidal voltages which are 180 degrees out of phase to a pair of external electrodes, luminous uniformity of over 84 % was attained in two types of lamps whose lengths are 190mm and 390mm. Luminance, efficacy, and input power to the lamp were 114,000cd/m2, 35 lm/W, and 21.5W when the 390mm lamp was driven at 5MHz with an inverter.
A polarization modulation polarimeter for a HPLC detector has been designed and constructed based on a principle, the electrical null-point detection method,. which is entirely different from that of a commercially available polarimeters, the optical null-point detection method. The Mueller matrix method is used to analyze and evaluate important factors determining its performance. It is revealed that a crystal quartz Rochon prism must be used as a polarizer, and should be mounted on a rotatable stage equipped with a mechanism for precise adjustment to set its azimuth angle at 0° as precisely as possible. Furthermore, all optical components used should have the least amount of the residual static birefringence. The total performance of our polarimeter is found to be equivalent to that of commercially available polarimeters.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.