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(Total 4 Products for When Were Optical Lens Invented)
Double concave lens is similar to flat concave lens. The focal length is negative, but the light incident in parallel diverges outward. The curvature radii of the two sides of double concave lens are equal. It is generally used for beam expansion and projection. The principle of geometric drawing of biconcave lens...
The principle of geometric drawing of biconcave lens imaging is the same as that of convex lens. The top of the object is also regarded as two straight lines: one is parallel to the main optical axis, deflects into divergent light after passing through the biconcave lens, and returns the refracted light to the main...
Optical lens laboratory optical
Custom shapes, such as square windows, step windows round windows and so on. Fused silica is an excellent optical material, with low thermal expansion, exhibits more shock resistance, high laser damage threshold and good chemical homogeneity. There are have UV Fused Silica and IR Fused Silica, UV Fused Silica contains...
Lens and Prisms optical cement
The roof surface of the prism is sometimes coated with optical coating to become the surface of the mirror, which makes the prism not limited to the critical angle of total reflection and can accept incident light at a large angle. Do not confuse the non dispersive Amish roof prism with the dispersive Amish prism....
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