| 摘要 |
1,186,302. Anamorphotic systems. ISCO OPTISCHE WERKE G. m. b. H. March 29, 1968 [March 30, 1967], No.15177/68. Heading G2J. An anamorphotic supplementary lens comprises two cemented pairs of cylindrical lenses L 1 , L 2 and L 3 , L 4 , which, when associated with a spherical lens O of focal length f = 1.0, the axes of the cylindrical lenses being vertical, provides a focal length of 0.7 in the horizontal plane and a focal length of 1.0 in the vertical plane, the optical data being as follows:- #n/r d n u r 1 = - 1, 7360 - 0, 35879 L 1 d 1 = 0,060 1,62286 60,0 r 2 = + 0, 7107 + 0,00172 L 2 d 2 = 0,170 1,62408 36,1 r 3 +2,4604 - 0,25365 d 3 = 0, 491 Air space r 4 = + 7,6720 + 0, 08135 L 3 d 4 = 0,066 1,62408 36,1 r 5 = + 1,1320 - 0, 00108 L 4 d 5 =0,116 1,62286 60, 0 r 6 = - 1,7120 +0,36382 where no surface refractive power, #n/r, differs by more than 20 per cent, no axial thickness, d, by more than 20 per cent, no refractive index n, by more than Π0.02 and no Abbe number v by more than Π5 from the values given above. A front spherical component F may be provided for focusing and the spherical objective O may be a triplet.
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