Patent ID: 6101019
Filing Date: 2000-08-08
Classification: B41J,G02B

Abstract:
An optical scanner using multiple half mirrors to combine multiple optical beams, comprising:n light emitting sources for emitting laser beams, where ""n"" is an integer greater than 1;(n-1) optical members having reflecting light entering a first face and allowing incident light to penetrate a second face which is opposite to the first face; anda housing in which the plurality of light emitting sources and the plurality of optical members are supported in such a way that the (n-1) optical members are arranged on substantially a linear line and the laser beams emitted from the light emitting sources are reflected not more than one time by the optical members,wherein:the n light emitting sources are kept to have uniform output, andwhen the optical members have a light transmissivity Tk (where ""k"" is an integer, 1<k<n-1), a reflectance Rk, and an attenuation rate while penetrating is g, the following expressions are satisfied,(1-g).sup.n-1 .multidot.T1.multidot.T2.multidot.T3 . . . Tn-1=(1-g).sup.n-2 .multidot.R1.multidot.T2.multidot.T3 . . . Tn-1=(1-g).sup.n-3 .multidot.R2.multidot.T3 . . . Tn-1= . . . =(1-g)Rn-2.multidot.Tn-1=Rn-1 (1)T1+R1+g=T2+R2+g= . . . =Tn-1+Rn-1+g (2).