RESULTS: The Δ E of Group A were larger than 1.5 NBS significantly. That is the smallest ΔE which could be differentiated by human eyes. The ΔE of Group B were smaller than 1.5 NBS.
The analytic formula of phakic intraocular lenses(PIOLs)power to correct myopia,hyperopia and eye's senior aberration is presented based on optical system model of human eyes,which improves the calculation accuracy of PIOL power compared with the experience formula.
Firstly,a color host image is transformed from CIE-RGB to CIE-LAB.Secondly after a binary image watermark ismodulated by an m pseudorandom sequence, it is moderately embedded to the middle third of DWT coefficients of Laccording to visual effect.
The resolution of the designed optical system reaches 0.7 mrad which is close to eyes minimum resolution,the lateral chromatic aberration is less than 42 μm for visible light band,and the maximum distortion is less than 2%.
Generation properties of a Raman laser based on a KGd(WO4)2 : Nd3+ crystal and operating in a mode of passive resonator Q switching by a YAG : V3+ crystal at a wavelength safe for human eyes is studied.