نتایج جستجو برای: optic effect
تعداد نتایج: 1682311 فیلتر نتایج به سال:
In this paper, modulation bandwidth characteristics of InGaAs/GaAs quantum dot (QD) laser were theoretically investigated. Simulation was done by using the fourth order Runge-Kutta method. Effect of carrier relaxation life time, temperature and current density on characteristics of tunneling injection QD laser (TIL) and conventional QD laser (CL) were analyzed. Results showed that tunneling inj...
OBJECTIVE This study is to investigate the effect of the combination of the olfactory ensheathing cells (OEC) transplantation and intravitreous injection of ciliary neurotrophic factor (CNTF) on the retinal ganglia cells' (RGC) apoptosis and axonals' reparation and regeneration. METHODS In this study, the supraorbital margin exposure of the optic nerves was used to establish adult SD rats' op...
AIMS/BACKGROUND It has been reported that the number of optic nerve fibres decrease with age, and the cup/disc (C/D) ratio increases as the optic disc size increases. Consequently, the normal value of the optic disc variables measured by an optic disc analyser may change according to the optic disc size or age. The effect of individual variations in optic disc size or age on interpretation of o...
The optic, electro-optic, and dielectric properties of antiferroelectric liquid crystals (AFLCs) are analyzed and discussed in terms of the local tilt plane orientation. We show that the so-called pretransitional effect is a combination of two different electro-optic modes: the field-induced antiphase distortion of the antiferroelectric structure and the field-induced reorientation of the tilt ...
In this paper, the set-up of a multi-mode fiber optic sensor for measuring glucose in aqueous solutions is investigated and evaluated. The basis of this sensor is based on the Fresnel Reflection. In this setup, a helium-neon laser is used as a light source, a fiber optic probe, photocell as detector and a digital multimeter. The statistical analysis of the recorded data shows a highly linear be...
Fiber optical current sensors based on Faraday effect have a lot of advantages over conventional current sensors and have been studied extensively. To eliminate the vibration sensitivity, a light path of reflective fiber optic current sensor improved is proposed, which makes discharge of Sagnac effect with Sagnac effect itself and do not disturb Faraday Effect at all. The reliability of the sys...
Purpose: To report a case of peripapillary intrachoroidal cavitation (choroidal schisis) and optic pit in a case of high myopia and open-angle glaucoma. Case report: A 30-year-old high myopic man was referred to our clinic for presumed peripapillary choroidal tumors. In funduscopy, there were two yellow-orange and slightly elevated peripapillary lesions in both eyes with indistinct margins. A s...
purpose: to report complications involving the posterior segment after laser assisted in situ keratomileusis (lasik) in 5 myopic patients ranging in age from 26 to 38 years. patients and findings: case one developed bilateral cilioretinal artery obstruction in association with ischemic optic neuropathy. case two presented with nonsimultaneous bilateral delayed-onset optic neuropathy. in case th...
We report a patient with a bilateral optic anterior ischemic neuropathy as an extrahepatic complication of a chronic hepatitis C (HCV) infection. The patient presented with a bilateral visual acuity loss and bilateral optic disc oedema. The optic neuropathy was associated with a sudden increase in the viral HCV load after a recent liver transplantation. The stop of the calcineurin inhibitor had...
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