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Gulden BV-15 and BV-16 Vertical and Horizontal Prism Bars
Part Number Gulden-11314, BV-15 and BV-16 bars
Gulden BV-15 and BV-16 Vertical and Horizontal Prism Bars
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Description
1314 - BV-15 & BV-16 Set Product Id # - 11314 Our exclusive manufacturing process greatly reduces optical strain, producing prisms that virtually eliminate clinical birefringent effects. Prism birefringence can adversely affect your vectographic testing by degrading target contrast ("image washout”), or in extreme cases, by reversing the eye that sees the target (“vectographic reversal”). Birefringence occurs in ordinary prisms because of optical strain which is due to minute molecular misalignments that occur in plastic manufacturing. Our prism bars are made of extremely high quality plastic, which are optically clear with an index of refraction of 1.49 and a light transmission value of 92%. The prism bars are available in various horizontal or vertical configurations, in diopter or degree ranges and sizes. Note: For important information regarding proper usage of prisms and a comparative study, contact your distributor, request literature # GO 9508502. Vertical Sizes: 1-2-3-4-5-6-8-10-12-14-16-18-20-25-30Δ Horizontal Sizes: 1-2-4-6-8-10-12-14-16-18-20-25-30- 35-40-4
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