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A modular erosion and sediment control barrier. The linear modular erosion and sediment control barrier is constructed of fiber logs joined end-to-end. Each fiber log is made of a quantity of loose fibers retained in a tubular casing by a plug. The tubular casing includes an extended section which i

A modular erosion and sediment control barrier. The linear modular erosion and sediment control barrier is constructed of fiber logs joined end-to-end. Each fiber log is made of a quantity of loose fibers retained in a tubular casing by a plug. The tubular casing includes an extended section which is peeled back and folds over the end of the coupler fiber log during storage and transportation. When deployed, the extended section is unfolded to receive the end of an adjacent fiber log. The two fiber logs are secured together by a cord and hooks.

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A modular erosion and sediment control barrier. The linear modular erosion and sediment control barrier is constructed of fiber logs joined end-to-end. Each fiber log is made of a quantity of loose fibers retained in a tubular casing by a plug. The tubular casing includes an extended section which i

A modular erosion and sediment control barrier. The linear modular erosion and sediment control barrier is constructed of fiber logs joined end-to-end. Each fiber log is made of a quantity of loose fibers retained in a tubular casing by a plug. The tubular casing includes an extended section which is peeled back and folds over the end of the coupler fiber log during storage and transportation. When deployed, the extended section is unfolded to receive the end of an adjacent fiber log. The two fiber logs are secured together by a cord and hooks. n effective lens region of 2.5 mm×2.5 mm. 7. A lens for shaping an optical radiation pattern, wherein the lens is formed into a one-piece member having an integral base and integral cylindrical lens portions that are located on respective sides of the base and that are oriented orthogonal to each other wherein each of the cylindrical lens portions is profiled as a non-spherical surface defined by z=((1/R)X2)/(1+(1+K(1/R)2X2)1/2) where z is an amount of cutting measured from a planar surface, and R and K are constants. 8. The lens according to claim 7, wherein the lens is molded entirely of transparent resin into the one-piece member. 9. The lens of claim 7 wherein said cylindrical lens portions are composed of a transparent acrylic resin. 10. The optical module of claim 1 wherein said cylindrical lens portions are composed of a transparent acrylic resin. 11. The lens of claim 7 wherein one lens portion of said cylindrical lens portions is profiled with R=0.75 and K=-1.4 and the other lens portion of said cylindrical lens portions is profiled with R=-0.85 and K=-1.3. 12. The lens of claim 7 wherein one of said cylindrical lens portions has an outside diameter of 5 mm, a thickness of 4 mm, and an effective lens region of 2.5 mm×2.5 mm.